LEAP Bridge Tutorials

[Type text] LEAP Bridge Enterprise Tutorials DAA039160-1/0001 Bentley Systems, Inc. www.bentley.com Tutorial 1 Tutorial 1 Two Span CIP prestressed box bridge with Multi-column Pier LEAP® Bridge Enterprise v13.0.0 Tutorial One © Bentley Systems, Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T1:1 Tutorial 1 Tutorial 1 Two-Span CIP Prestressed Box Bridge with Multi-Column Pier This tutorial is a step by step walkthrough of the analysis and design of a two-span cast-in-place posttensioned concrete box-girder bridge, with a multi-column pier using LEAP Bridge. The example illustrates the full lifecycle work flow starting with the basic modeling in the ABC Wizard, followed by detailed design using CONBOX, and ends with the detailed, step-by-step analysis and design of the reinforced concrete sub-structure using RC-PIER. While the design of abutments is also possible in RCPIER, for the sake of brevity, the detailed step by step design of the abutment is omitted for this example. 12 m 6m 6m 1.9625 m 4.0375 m 4.0375 m 1.9625 m Z 2.5 m Y CG 1.8 m Gross Properties CGz: 0.0000 m CGy: 1.0608 m Area: 7.7969 m^2 Izz: 7.4042 m^4 Vol/Area: 158.8126 mm 1.8 m Superstructure Cross Section Sta 0+02 Figure W-1: Bridge superstructure cross-section view LEAP® Bridge Enterprise v13.0.0 Tutorial One © Bentley Systems, Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T1:2 T1:3 .0.Tutorial 1 BB-EB CL: 44 m Span 1: 22 m Span 2: 22 m X Y Figure W-2: Bridge side elevation showing span information Figure W-3: Pier front and side views LEAP® Bridge Enterprise v13. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0 Tutorial One © Bentley Systems. Inc. 860 MPa Area: 2.Tutorial 1 Bridge Data 1. strength.0 Tutorial One © Bentley Systems. LowLax Ultimate Tensile Strength. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. at 28 days: 40 MPa fi.9 mm Rebar Properties Flexure and Shear Steel: Fe415. Column and Footings) fck. fp: 1. Superstructure Concrete Properties fck. Inc. 2 crash barriers and 2 footpaths (left and right) Live Load IRC Loading. Maximum number of design lanes = 2 One lane of class 70R or two lanes of Class A Substructure Concrete Properties (Cap.0. Strength. HYSD Steel Dead Load on Superstructure: Self-weight of wearing surface. T1:4 .667. initial: 35 Mpa Weight: 2500 kg / m3 Single Stage Post-tensioning Strand Properties Strand Type: 27T13. at 28 days: Weight: 35 MPa 2500 kg / m3 LEAP® Bridge Enterprise v13.6mm2 Duct diameter: D=105. 0 Tutorial One © Bentley Systems.Tutorial 1 Concrete Strength Cap Columns Footings Modulus of Elasticity Concrete Density Cap Columns Footings Steel Yield Strength Cap Columns Footings Modulus of Elasticity Superstructure Parameters Number of lanes Type (Pretensioned girders) Beam Height Beam Section Area Beam Inertia Ixx Beam Inertia Iyy Beam Ycg Kerb Height Slab Depth Total number of spans Span Information Bridge Overall Width.000 MPa =3 = 2500 mm = 7. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.79694e+006 mm2 = 7.0.85 mm = 914.79694e+006 mm4 = 1060. Inc. Span 1. ft Span Length. ft fck = 35 MPa fck = 35 MPa fck = 35 MPa Ec = 33.79694e+006 mm4 = 7.722 MPa 2500 kg/m3 2500 kg/m3 2500 kg/m3 fy = 415 MPa fy = 415 MPa fy = 415 MPa Es = 200. T1:5 . ft Curb to Curb Distance.4 mm = 300 mm 2 12 m 12 m 22 m LEAP® Bridge Enterprise v13. The Wizard can be launched simply by clicking on the ABC Wizard icon in the toolbar. click on Next to move to step 2 and input information for the drop cap multi-column pier as shown in Figure W-6. Inc. and start modeling the bridge using the ABC (automated bridge creator) Wizard. The default units are preset to SI (Metric) units for the IRC code.Tutorial 1 Start of Tutorial Start the LEAP Bridge software application by clicking on Start > All Programs > Bentley > LEAP Bridge. After completing the superstructure input. Figure W-4: Project tab information Click the Geometry tab.0. If there are similar multiple piers. this optional information can also be input at this stage. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. LEAP® Bridge Enterprise v13. Begin entering the information shown in Figure W-5 related to the bridge superstructure cross-section and span details. simply use the copy button to copy the current pier geometry to other piers. The input is fairly straightforward and can be completed quickly by simply inputting the values for various input fields. cross-section and vertical profile is available. Set the Design Code to ‘India_IRC’ and fill in the general project information as shown in the figure below.0 Tutorial One © Bentley Systems. If detailed information about the geometry of the bridge including the alignment information. T1:6 . No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Superstructure details LEAP® Bridge Enterprise v13.0 Tutorial One © Bentley Systems. Step 1.0.Tutorial 1 Figure W-5: ABC Wizard. T1:7 . Inc. Simply copy the Abutment Number 1 properties to the end abutment (Abutment Number 2) using the copy tool available on this screen. LEAP® Bridge Enterprise v13. Step 2. Change the selection to “Abutment” and Number “1” and complete the input of abutment properties as shown in Figure W-7. Inc.Tutorial 1 Figure W-6: ABC Wizard. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0.0 Tutorial One © Bentley Systems. click on the Pier drop down in the top left hand corner of the window. T1:8 . Substructure details (Pier) Once the input for the pier is complete. Substructure details (start abutment) Next enter the values for the material properties as shown in figure W-8 below.Tutorial 1 Figure W-7: ABC Wizard.0 Tutorial One © Bentley Systems. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. and you can press the finish button to complete the initial description and view the generated 3D model on the Geometry tab of LEAP Bridge as shown in Figure W-9. T1:9 . the user will be able to override these default settings in the component programs. Inc.0. LEAP® Bridge Enterprise v13. If all information for these three steps in ABC wizard is accurate. the status window will reflect the same. These values will be used as defaults when data is transferred from LEAP Bridge to CONBOX or RC-PIER. After the initial model is built with these properties. Step 2. 0 Tutorial One © Bentley Systems. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. zoom. Figure W-8: ABC Wizard. and pan by either using the right mouse menu (context sensitive menu) or simply accessing the appropriate functions on the tool bar. LEAP® Bridge Enterprise v13. Materials. Inc.0. you could play around with some of the viewing options such as rotation.Tutorial 1 Now that the initial model has been created. Step 3. T1:10 . Let us now complete the input process in CONBOX and complete the design of the superstructure.0 Tutorial One © Bentley Systems.0.xml” to save the file. Next.Tutorial 1 Figure W-9: 3D Bridge model in LEAP Bridge. All of the pertinent data is automatically transferred to CONBOX and CONBOX is displayed as shown in Figure W-10 below. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. click on the Superstructure tab. and the click on the CONBOX button. Now is a good time to save the input. Click on File/Save and provide a name “workshop1. T1:11 . LEAP® Bridge Enterprise v13. Inc. Click on the Define buttons to view and change the dimensions.0. Click OK to close this dialog and view the updated section view showing the 2D graphics for the barrier and footpath on the cross-section.Tutorial 1 Figure W-10: CONBOX Project tab with information completed automatically. simply click on the Geometry tab. and all of the dead loads are automatically considered in the appropriate load groups for analysis. Make sure to hit the Include All button. Inc. T1:12 . Pier.0 Tutorial One © Bentley Systems. and then click on the Crash Barriers button. Layout and Cross-section. footpath and wearing surface. so. the definitions for Geometry in the ABC Wizard were quite sufficient and no further changes are required in the Geometry tab for Alignment. Figure W-11: Crash Barriers definition screen LEAP® Bridge Enterprise v13. Since our demonstration model is quite simple. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. However we do wish to add the superimposed dead loads such as the crash barriers. this can be done through the right-click menu options. Inc. Next click on the Model tab. as shown in the screen below. Note that some loads such as temperature gradient and construction will need to be manually deleted from this list of loads. to focus on workflow for this particular example. i.0 Tutorial One © Bentley Systems. LEAP® Bridge Enterprise v13. T1:13 . the appropriate loads and load factors all per IRC have already been predefined as shown in Figure W-14 and W-15. Select the appropriate Tendon Type. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Click OK to close this screen and move to the Loads and Analysis tab in CONBOX. one in each web. By default all of the initial and final load cases.e. 27T13. and then the Tendon button and input the information for the three strands.0.Tutorial 1 Figure W-12: Updated 2D graphics of bridge cross-section after adding crash barriers etc. Figure W-13: Tendon definition. if a load is already present in any load combination. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. and they can be edited here. and all instances of those particular loads are automatically updated wherever they are used.). duplication is avoided.Tutorial 1 Figure W-14: Load Combinations (for Initial) In the figure above. T1:14 . the right hand side tree with the BR01 (current box girder bridge) Loads are the library of loads on this particular bridge. Inc.0. LEAP® Bridge Enterprise v13. etc. The right-click menu option allows the user to automatically add a particular load defined on the right side to all load combinations on the left side. Ultimate I. To use these loads simply drag and drop them over to the left hand pane in the appropriate Case (initial or final) and Combination. ( Service I.0 Tutorial One © Bentley Systems. T1:15 . Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.Tutorial 1 Figure W-15: Expanded view of BR01 Loads in Library. LEAP® Bridge Enterprise v13.0.0 Tutorial One © Bentley Systems. 0. T1:16 .Tutorial 1 Figure W-16: Load Combinations (for Final) You can verify and if required edit and modify the load factors for each combination under both Initial and Final loads. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Figure W-17: IRC Load Combination Factors dialog. Inc. shown here for “Service I Final”.0 Tutorial One © Bentley Systems. Simply double-click on the Load Combination name in the left hand side window to bring up a dialog which looks similar to the screen shown in Figure W-17. LEAP® Bridge Enterprise v13. 0 Tutorial One © Bentley Systems. Figure 18: Results on the Design Tab Figure W-19: Design Parameters dialog In the main menu click on Settings > Design Parameters to bring up the dialog showing the design parameters per IRC. provided and also the initial and final concrete strengths required and provided as shown in Figure 18. some LEAP® Bridge Enterprise v13. Notice also that the program automatically switches you to the design tab. Notice that since we are working with PT concrete. as shown in Figure W-19. and shows the P-jack required vs. the Run Analysis button turns into View Analysis and you could look at the detailed reports (either as graphs or tabular data).Tutorial 1 Click on the Run Analysis button on the Loads/Analysis button to run the actual longitudinal analysis. Inc. T1:17 . moving the trucks along the bridge. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0. Once the Analysis is complete. 0. but since no changes are required. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. and also optionally copy this back to the model.0 Tutorial One © Bentley Systems. 6 for number of legs and 150 mm for spacing and do an auto-design. Inc. Figure W-20: Auto-design in Longitudinal Rebar dialog. Program comes up with a rebar pattern as shown in Figure W-20. Program comes up with a stirrup schedule which you could clean up to make it more construction friendly and click OK to accept the reinf. You can view the results in CONBOX. click on Rebar and in the Dialog which comes up. by simply clicking on the Print icon in the toolbar to bring up the dialog shown below in Figure W-21 LEAP® Bridge Enterprise v13. click cancel to close this screen and go back to the program. On the Design Tab. select Bar size MS25-GR1 and perform an auto-design. Next click on the Stirrups dialog and select MS12-GR1 for the stirrup size. Review the settings here. Click OK to accept and close the dialog.Tutorial 1 of the fields for Reinforced Concrete and Plain concrete are locked. T1:18 . 0 Tutorial One © Bentley Systems. T1:19 .Tutorial 1 Figure W-21: Auto design stirrups dialog.0. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Inc. LEAP® Bridge Enterprise v13. Notice now that the reinforcement has been updated in the superstructure (visible when the transparency option is selected in the 3D view).0. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. See figure W-22 below. Now that the design of the superstructure is complete. LEAP® Bridge Enterprise v13. Click OK to close CBX and transfer information back to the LEAP Bridge model for further processing of the substructure. Inc.0 Tutorial One © Bentley Systems. T1:20 .Tutorial 1 Figure W-21: Print dialog in CBX. select PR01 in Abut/Pier list and then click on the RC-PIER button. all of the pertinent data is automatically transferred to RC-PIER and it is displayed as shown in Figure W-23 below. Let us now complete the input process in RC-PIER and complete the analysis & design of the substructure. Inc.Tutorial 1 Figure W-22: Tendons. Click on save the project. rebar and representative stirrups in the 3D bridge model in LEAP Bridge. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0. LEAP® Bridge Enterprise v13.0 Tutorial One © Bentley Systems. Next click on the SubStructure tab. T1:21 . Inc. LEAP® Bridge Enterprise v13.Tutorial 1 Substructure design Figure W-23: RC-PIER Project tab with information completed automatically. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0 Tutorial One © Bentley Systems. For this example. we will continue with multi column and round column as defined in ABC wizard in LEAP Bridge. Click on Pier configuration. T1:22 . Switch to Geometry tab and note that all the geometry information is filled in correctly.0. you can review the respective geometry information.0 Tutorial One © Bentley Systems. column. Also. LEAP® Bridge Enterprise v13.Tutorial 1 Figure W-24: Pier configuration showing multicolumn. Click on bearing dialog. and footing dialog. you need to define the bearing locations. T1:23 . For this example. straight cap and round column You can review the superstructure parameters information as imported from CONBOX.0. clicking on Cap. Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Tutorial 1 Figure W25: Bearing data Select single bearing line option. Define the 1st bearing at 2 m from the cap left end. Define 2nd bearing at 4 m from the previous bearing location. Click OK to accept these changes. The complete pier geometry can be reviewed in 3D view under geometry tab. Figure W-26: 3D Graphical view of pier You can rotate; zoom in/out using the graphical options given below the 3D view. You can switch to 2D view to copy or print the pier geometry. Next, move to load tab to define the load applied on pier and select the desired load groups as per IRC specifications. LEAP® Bridge Enterprise v13.0.0 Tutorial One © Bentley Systems, Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T1:24 Tutorial 1 For this example, primarily you will consider dead, live, wind, and braking force. Select dead load (G) from the list of loads available and click to select it. Select Dead load case (G) and click edit to open the load dialog. Click generate button to open the auto load generation options as shown in W-27 and select import load from superstructure option. Select the dead load G & SG to import the load on pier1, as shown in Figure W-28 Figure W-27: Auto dead load generation dialog. LEAP® Bridge Enterprise v13.0.0 Tutorial One © Bentley Systems, Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T1:25 Tutorial 1 Figure W-28: Dead load imported from superstructure Upon clicking “Generate” button will distribute the dead load on bearings as shown in Figure W-29. LEAP® Bridge Enterprise v13.0.0 Tutorial One © Bentley Systems, Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T1:26 0. select live load and select generate load. Depending on the carriageway width. On the same dialog. program generates numerous live load combinations based on IRC 6-2000 specifications. Inc.0 Tutorial One © Bentley Systems. it isolates the most critical combinations producing the maximum effect in the individual members. LEAP® Bridge Enterprise v13.Tutorial 1 Figure W-29: Load case dialog Click OK to accept these values and close the dialog. In a similar way. T1:27 . select the option to generate longitudinal forces. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Keep the default IRC rule option and import the live load reactions for Class A and Class 70R vehicles from superstructure (CONBOX) as these are already computed during superstructure design as shown in Figure W-30. This will generate the breaking force for each combination. Among these generated combinations. 0 Tutorial One © Bentley Systems.0. but if you click OK after editing. Note: You can edit the individual load case to check the bearing reaction. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T1:28 . You can click on “LL details” to view the details of each live load positioning.Tutorial 1 Figure W-30: Live load generation Click OK to accept the load cases. program has generated 7 critical live load combinations. Note that. LEAP® Bridge Enterprise v13. program erases the live load details descriptions. Inc. LEAP® Bridge Enterprise v13. select wind load case (Ws) and click edit to generate the wind load forces on structures. You can generate the wind load force acting independently or simultaneously acting on the live load. For this example. Generate the wind load for a range of wind angles from 30 degrees to -30 degrees.0 Tutorial One © Bentley Systems. Inc.0. acting on substructure. T1:29 . we will generate the wind acting simultaneously on the live load by checking the appropriate box. will be selected. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.Tutorial 1 Figure W-31: List of selected loads Now. Depending on the bridge location and pier elevation. correct wind pressure per IRC. 0. Run the analysis and program will generate the default load combinations. move to Analysis tab. T1:30 . You can review the analysis results for each load case or for particular combination at each specific member node LEAP® Bridge Enterprise v13. Click on A/D Parameters (Analysis and Design Parameters) to check the permissible stress values. For this example. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Inc. select Service I and Service IIIA load groups.Tutorial 1 Figure W-32: Wind load generation dialog Once all the required load cases are defined. Next. we will not make any changes and use the default parameters.0 Tutorial One © Bentley Systems. Inc. Program comes with its own reinforcement and stirrup schedule. program flags that location. Select MS25. you are ready to design the individual components cap. Switch to Cap tab and select Auto-design.GRI and MS-12-GR1 for stirrup size. T1:31 . column and footing based on IRC specifications.0. LEAP® Bridge Enterprise v13. Click on Design status to review the flexure. If at any locations. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. which can be edited manually.0 Tutorial One © Bentley Systems. shear and torsion design. This prompts the user to select the rebar size.Tutorial 1 Figure W-33: Analysis results dialog Now. design fails. 0 Tutorial One © Bentley Systems.0. For this example. auto-design will prompt you select one or multiple rebar choices. select MS-25 Gr1 along with MS8-Gr1 for stirrups. as shown in figure W33. you can revise the reinforcement pattern. design the columns & footings. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Program will select the rebar which satisfies the stress check or axial capacity if column is only axially loaded. LEAP® Bridge Enterprise v13.Tutorial 1 Figure W-34: Cap design tab Similarly. For column design. revise the cross section. If section is getting cracked. Inc. Start with auto-design and based on the stress check results. T1:32 . Select FTG01 from the available list and click Auto-design. LEAP® Bridge Enterprise v13. user can define the reinforcement start and end locations. For this example. you can use either use Auto-design or manually define the reinforcement.0. Use MS25-GR1. this dialog will be slightly different. Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.Tutorial 1 Figure W-35: Column design reinforcement In the footing design. Depending on the footing type. For combined footing. You can design all footings at the same time by checking the box for “Auto-design all “.0 Tutorial One © Bentley Systems. T1:33 . we have defined spread footings and will use Auto-design. Tutorial 1 Figure W-36: Footing design tab You can view the results in RC-PIER by simply clicking on the Print icon in the toolbar to bring up the dialog shown below in Figure W-37.0 Tutorial One © Bentley Systems. T1:34 . Inc.0. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. LEAP® Bridge Enterprise v13. Inc. LEAP® Bridge Enterprise v13. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Notice that the reinforcement has been updated in the substructure (visible when the transparency option is selected in the 3D view). T1:35 .0 Tutorial One © Bentley Systems. Now that the substructure design is complete.0.Tutorial 1 Figure W-37: Print dialog in RC-PIER. See figure W-38 below. Click OK to close RC-PIER and transfer information back to the LEAP Bridge model. T1:36 . No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Inc.0.0 Tutorial One © Bentley Systems. Save the project to continue the design of abutment.Tutorial 1 Figure W-38: Pier reinforcement display in 3D model of LEAP Bridge. LEAP® Bridge Enterprise v13. .Tutorial 2 Tutorial 2 Two span bridge with pre-tensioned concrete girders. and multi-column pier. 05843 x 1011 mm4 Height 1200 mm Web Thickness 200 mm LEAP® Bridge Enterprise v13.55 m 3m 3m 1 2 3m 3 1.0. Inc.0 Tutorial Two © Bentley Systems.86 mm Moment of Inertia 1. analysis and design of a two-span bridge with precast pretensioned girder superstructure and multi column pier substructure. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. and multi-column pier. T2:1 .1 m 1. 240 mm 12.55 m 4 Figure T2-1: Bridge Superstructure Cross-section view Figure T2-2: Span Data Figure T2-3: 1200 mm Girder details & properties Area 5. This tutorial takes you through the modeling.Tutorial 2 Tutorial 2 Two span bridge with pre-tensioned concrete girders.44x105 mm2 Ycg (from bottom) 562. Tutorial 2 Figure T2-4: Longitudinal Pier Elevation view Figure T2-5: Transverse Pier Elevation LEAP® Bridge Enterprise v13. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Inc.0 Tutorial Two © Bentley Systems. T2:2 .0. 0 Tutorial Two © Bentley Systems.Tutorial 2 LEAP® Bridge Enterprise v13.0. Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T2:3 . precast at 28 days: 40 MPa Strength. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T2:4 . cast-in-place topping (Deck slab): 40 MPa LEAP® Bridge Enterprise v13. precast at release/transfer: 35 MPa Strength.0. Inc.0 Tutorial Two © Bentley Systems.Tutorial 2 Figure T2-6: Footing Plan and Elevation Problem Data Concrete Properties Strength. maximum number of design lanes = 3. Inc. UTS = 1860 MPa Straight Strand Pattern Rebar Properties Fe415. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0. 7 wire strand.Tutorial 2 2500 kg / m3 Weight: Strand Properties Strand Type: High Tensile steel.7mm dia. Live Load IRC Loading Class A and Class 70R. Carriageway width = 11. T2:5 . Low relaxation. HYSD Steel.0 Tutorial Two © Bentley Systems.1 m Dead Load Weight of each barrier 6 KN/m. Total weight of left and right barriers: 12 KN/m Substructure Data: Concrete Strength Cap fck = 35 MPa Columns fck = 35 MPa Footings fck = 35 MPa Modulus of Elasticity Ec = 33722 MPa Concrete Density Cap 2500 kg/m3 Columns 2500 kg/m3 Footings 2500 kg/m3 Steel Yield Strength Cap fy = 415 MPa Columns fy = 415 MPa LEAP® Bridge Enterprise v13. 12. ft 12.0 Tutorial Two © Bentley Systems.1 m Span Length. of Design Number of lanes =3 Type (Pretensioned girders) Beam Height = 1200 mm Beam Section Area = 54399 mm2 Beam Inertia Ixx = 1.8 mm Curb Height = 914.4 mm Slab Depth = 240 mm Total number of spans 2 Span Information Bridge Overall Width. Inc.058e+011 mm4 Beam Inertia Iyy = 1.058e+011mm4 Beam Ycg =562. ft 17.Tutorial 2 Footings fy = 415 MPa Modulus of Elasticity Es = 200.1 m Curb to Curb Distance. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Span 1.100 KN/m LEAP® Bridge Enterprise v13. ft 11.0. T2:6 .000 MPa Superstructure Parameters Max. No.545 m Substructure Load Dead load Self weight 2500 kg/m3 Slab 2500 kg/m3 Girder weight 2500 kg/m3 Curb Weight = 12 KN/m Future Wearing surface = 6. 7 Pa Long.0 Tutorial Two © Bentley Systems. Inc.Tutorial 2 Live Load Class 70R.0. Wind pressure on superstructure 463. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.92 Pa Wind on Live load Length of live load 18. T2:7 . Wind pressure on superstructure 115. Class A 70R and Class A reaction from Superstructure Wind on structure Direction of Wind 30 to -30 Elevation above which wind acts =0m Trans.22 m LEAP® Bridge Enterprise v13. Begin Entering the information shown in Figure T2-8 to enter bridge superstructure cross-section and span details. LEAP® Bridge Enterprise v13. T2:8 . Inc.0.Tutorial 2 Start of Tutorial Start the LEAP Bridge software application by clicking on Start > All Programs > Bentley > LEAP Bridge. The Wizard can be launched simply by clicking on the ABC Wizard icon in the toolbar. Set the Design Code to ‘India_IRC’ and fill in the project information as shown in the figure below. and start the modeling of the bridge using the ABC (automated bridge creator) Wizard. Figure T2-7: Project Tab Click on the Geometry tab. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0 Tutorial Two © Bentley Systems. Inc. T2:9 .0 Tutorial Two © Bentley Systems. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.Tutorial 2 Figure T2-8: Step 1 ABC Wizard – Superstructure input LEAP® Bridge Enterprise v13.0. LEAP® Bridge Enterprise v13. Within CONSPAN. Inc. Start LB. Enter the properties including the strand template.0. save changes to library and close CONSPAN and come back to LEAP Bridge. T2:10 .Tutorial 2 Figure T2-9: ABC Wizard – Step 1 – Span Details input Note: To add a new section to the beam section library. Select the I-girder type and click on Add. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. go to the Libraries menu and click on Beam Sections. go to the superstructure tab and click on CONSPAN.0 Tutorial Two © Bentley Systems. Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T2:11 .Tutorial 2 Figure T2-10: ABC Wizard – Step 2: Pier Definition LEAP® Bridge Enterprise v13.0.0 Tutorial Two © Bentley Systems. LEAP® Bridge Enterprise v13. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0 Tutorial Two © Bentley Systems. T2:12 . Inc.0.Step 3: Materials Data Click Finish and the 3D model is generated and can be seen in the Geometry Tab.Tutorial 2 Figure T2-11: ABC Wizard. 0 Tutorial Two © Bentley Systems.Tutorial 2 Figure T2-12: Geometry Tab showing 3D Model. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. LEAP® Bridge Enterprise v13.0. T2:13 . Inc. Note CONSPAN is the component software for the design of pre-tensioned girders while CONBOX is for the design of Box Girders. Figure T2-13: Superstructure Tab showing 2D view When CONSPAN comes up. as was described in the ABC Wizard input.0 Tutorial Two © Bentley Systems. and set up the information as shown in the figure below.Tutorial 2 SUPERSTRUCTURE DESIGN Now that the basic bridge model has been built. Inc. Slabs and T-beam bridges.0. you will notice that all of the Project and Geometry information is already filled in. LEAP® Bridge Enterprise v13. So simply verify the information and move to the Materials tab. let us analyze and design the superstructure in detail by moving to the superstructure tab and then click on the CONSPAN button. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T2:14 . 0 Tutorial Two © Bentley Systems.Tutorial 2 Figure T2-14: Material Tab Next click on the loads tab to specify dead and live loads. Make sure to set the keep Values option checked so that these values are retained in this dialog.0. Inc. T2:15 . No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. For dead loads we will use the dead load wizard dialog shown below to specify the left and right curb weight values and a future wearing surface value. Figure T2-15: CONSPAN: Dead Load Wizard Tab LEAP® Bridge Enterprise v13. While the initial longitudinal analysis is done by loading a continuous beam model influence lines. let us stay with the default load selection as per IRC rules. LEAP® Bridge Enterprise v13. T2:16 .f & g as shown below. Figure T2-16: Loads Tab showing both Dead and Live Loads. the transverse distribution is done by using the Courbon’s method. Modify the parameters c. Inc. Next click on the Analysis Tab.0. You can see that there are no results since the analysis has not yet been done. You can view the factors which are set up as per the recommendations in the IRC codes. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. We will not make any changes here for either dead or live load distribution. CONSPAN will automatically apply the appropriate loads in the appropriate lanes and combinations and determine the governing/controlling loads.0 Tutorial Two © Bentley Systems.Tutorial 2 For Live Loads. Now click on the Run Analysis button and all the dead and live loads are processed and the results are displayed as shown below.0. Inc. for each span and for each beam. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T2:17 . various combinations for Service or Strength/Ultimate.Tutorial 2 Figure T2-17: Analysis Tab / Analysis Factors. LEAP® Bridge Enterprise v13. Results can be seen for specific loads.0 Tutorial Two © Bentley Systems. LEAP® Bridge Enterprise v13. You can view the Project Design Parameters by clicking on the design parameters button and verify the settings for the design of the pre-tensioned beams.0 Tutorial Two © Bentley Systems. In this screen you can set various design parameters such as permissible stresses. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. moment and shear design criteria etc. Inc.0.Tutorial 2 Figure T2-18: Analysis Tab / Analysis results. T2:18 . Any overstress or undercapacity is highlighted in the reports to draw the user’s attention. click on the beam tab to specify the prestressing strand pattern.0. For this example.Tutorial 2 Figure T2-18: Beam Tab After the analysis is completed. Double-click the beam icon or click on Strand Pattern button to bring up the Strand Pattern screen. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. LEAP® Bridge Enterprise v13. service stresses and ultimate moment requirements are satisfied. select beam 2 and define the strand pattern as shown in Figure T2-19. You can select the specific beam that you want to design the strand pattern for by simply clicking on the beam in the top window or using the drop down box and selecting the span # and the beam #. You can check the design status for this group of strands and verify that all release stresses. enter the strand pattern shown in the screen below which includes a mix of straight and draped strands.0 Tutorial Two © Bentley Systems. In the Strand Pattern dialog. T2:19 . Inc. 0. Inc. In the dialog that is shown below. LEAP® Bridge Enterprise v13. you can view more comprehensive results by clicking on the Results button. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. you can specify exactly which section of the report you would like to see/print etc.Tutorial 2 Figure T2-19: Beam Tab The design status reports only provide partial reports. T2:20 .0 Tutorial Two © Bentley Systems. After you click OK on the Strand Pattern screen and accept the strand pattern. Click no to generate reports at this time. the strands can be seen in the beams. then click OK on the message which prompts you to update the LEAP Bridge Model. LEAP® Bridge Enterprise v13. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. By doing this all the reinforcement is now written back to the LEAP Bridge Model as also reactions for use in the substructure design.0 Tutorial Two © Bentley Systems. T2:21 .Tutorial 2 Figure T2-20: Results Dialog Close CONSPAN by clicking on File / Exit. Inc. If the transparent mode is turned on the Geometry tab 3D image.0. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T2:22 . Click and drag to rotate the model. Inc. Complete the other project information. and set up the information as shown in the figure below. When RC-PIER comes up.Tutorial 2 Substructure Design Click on the Substructure tab and then on the RC-PIER button. you will notice that all of the Project and Geometry information is already filled in. as shown in Figure T2-22.By default IRC standard and SI unit will be selected.0. So simply verify the information and move to the Loads tab.0 Tutorial Two © Bentley Systems. Figure T2-21: Project Information Screen Step 2 Click on the Geometry tab to open the Geometry screen. Step 1 The Project screen will be displayed. as was described in the ABC Wizard input. LEAP® Bridge Enterprise v13. as shown in Figure T2-21. . Set the Pier View direction to Upstation. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Multi Column Pier Type. Click OK.0. T2:23 . and Round Column Shape are selected. Straight Cap Shape. Inc. LEAP® Bridge Enterprise v13.0 Tutorial Two © Bentley Systems.Tutorial 2 Figure T2-22: Geometry Tab Screen Step 3 Click on Pier Configuration to open the Pier Configuration screen. as shown in Figure T2-12 Note that. Inc. All the values for the number of lanes. Upon review.Tutorial 2 Figure T2-23: Pier Configuration Screen Step 4 Click on Superstructure to open the Superstructure Parameters screen. T2:24 . and total length and width of spans.0. Also. LEAP® Bridge Enterprise v13.0 Tutorial Two © Bentley Systems. beam height and area. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. . curb/railing height. slab depth. click OK to accept and close superstructure parameter dialog. total number of spans. bridge type selected is pretensioned girders based on the superstructure specified in LEAP Bridge. are brought over from the superstructure program as shown in Figure T2-24. 1 m). LEAP® Bridge Enterprise v13. as shown in Figure T2-14.0 Tutorial Two © Bentley Systems. T2:25 . Inc.0.Tutorial 2 Figure T2-24 Superstructure Parameters Screen Step 5 Click on Cap to open the Straight Cap Parameters screen. Verify the various dimensions shown such as pier cap (12. Cap Depth (2700 mm). Cap Height (1500 mm). No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Click OK. and the Start and End Elevations (28.9151 m. each). make the necessary changes. To delete a column. T2:26 .Tutorial 2 Fig T2-14: Cap properties Screen Step 6 Click Column to open the Rounded Column screen. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Figure T2-15 Round Column Screen To modify a column.0 Tutorial Two © Bentley Systems. Inc.0. as shown in Figure T2-15. as follows. Step 7 LEAP® Bridge Enterprise v13. highlight it and click Delete. and click Modify. we are using three columns. (This screen will be specific to the type of column shape selected.) For this tutorial. highlight it in the list. The following illustrates how to define a spread footing and pile/cap footing.Tutorial 2 Click on the Footing|Pile button to open the footing configuration. Figure T2-16 Footing input Screen 1. as shown in Figure T2-17 LEAP® Bridge Enterprise v13. T2:27 . Notice three footings have been defined. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Inc.0 Tutorial Two © Bentley Systems.0. Select FTG03 and click on Edit to activate the Isolated Spread Footing screen. The name Pile cap will appear in the list at the bottom of the screen. LEAP® Bridge Enterprise v13. as follows: 2. Click Add. Select 1@1. Inc.Tutorial 2 Figure T2-17 Isolated Spread Footing Screen How to define the Pile/Cap Footing Design. T2:28 . No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.85 under Columns. and select Pile/Shaft Cap under Type.0.0 Tutorial Two © Bentley Systems. input Pile cap in the Name field. 6. to use the pile pattern defined in the library screen. 4. In the Edit Mode. we will design the isolated spread footing under column 1 which also works for the footings under column 2 & 3. Note that. Specify the footing name as Spread2 and click Add. Step 8 In this example.0. 5. All information about FTG01 will be copied to FTG02 and FTG03 footing. select Circular from the Pile/Shaft Shape list and input 12 in the Pile/Shaft Size field and 150 in the Max. LEAP® Bridge Enterprise v13. Click OK and return to the Footing screen. On the Footing tab.0 Tutorial Two © Bentley Systems.6 m. Step 9 Click on Brgs/Grdrs to open the Bearings/Girders screen.eccentricity. and distance from left end of pier cap to individual bearings. select From Library. T2:29 . This screen is used to define the configuration of the bearing line . as shown in Figure T2-19.6 m × 3. Inc. Pile Capacity field. On the Isolated Spread Footing dialog click on the Copy From button Select FTG01 from in the list and click Copy.Tutorial 2 Figure T2-18 Footing: Isolated Pile/Shaft Cap Design Screen 3. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Choose concentric under column. all the bearing information should have already been automatically filledin as defined in superstructure. Select user input and specify footing size of 3. Under Pile/Shaft configuration. select column 2 in the columns list. You can override these values by typing over them. T2:30 . LEAP® Bridge Enterprise v13. For each bearing point. To modify a bearing line in the list.0 Tutorial Two © Bentley Systems. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. This allows you to input the same value multiple times. make the appropriate changes. and reinforcing steel strength as well as the concrete type. you can select the Last Point option. This screen defines the strength. Notice that the program defaults to certain values. the distance is defined either using Cap Left End option under Distance From or with respect to the last point. concrete modulus of elasticity. For all other points. as shown in Figure T2-20. To delete a bearing line. and click Modify.Tutorial 2 Figure T2-19: Bearing input screen. highlight it and click Delete. Note: If you want to redefine the bearing location. highlight it. Input the values shown in the figure and click OK to return to the Geometry screen. the first bearing point must be measured from Cap Left End. Double Configuration indicates that there are two bearing lines on the pier. Step 10 Click Material to activate the Materials screen.0. each new bearing spaced evenly from the previous bearing. density. Inc. Model to open the Structure Model screen. LEAP® Bridge Enterprise v13. Inc.Tutorial 2 Figure T2-20 Materials Screen Step 11 Click Str. add or remove nodes of the pier structure for use as reference points (checkpoints). Use this screen to keep track of all nodes of the pier structure. T2:31 .0. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. and define hinges at existing points. as shown in Figure T2-21. Click Cancel to return to the Geometry screen.0 Tutorial Two © Bentley Systems. A 3-D image of the structure will be displayed on the screen.0. LEAP® Bridge Enterprise v13.0 Tutorial Two © Bentley Systems.0 T1 -13 Step 12 Select Image from the Show menu to activate the Image screen (or the corresponding icon on the toolbar at the top of the screen). No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. as shown in Figure T2-22.Tutorial 2 Figure T2-21 Structure Model Screen LEAP® RC-PIERv9.0. T2:32 . Inc. Close or minimize the screen and return to the Geometry screen. Step 13 Select Model from the Show menu or its corresponding icon on the toolbar at the top of the screen to bring up the Model screen as shown in Figure T2-23. T2:33 . Inc. zoomin or out).Tutorial 2 Figure T2-22 Image Screen Use the buttons on the left of the screen to manipulate your view of the image (e.g.0. etc will be displayed on the screen.0 Tutorial Two © Bentley Systems. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. rotate. Experiment with the buttons to become familiar with their functions. A 3-D model of the nodes. LEAP® Bridge Enterprise v13. element number. pan.. and Checkpoints). Inc. Close or minimize the screen and return to the Geometry screen. LEAP® Bridge Enterprise v13. as shown in Figure T2-24.0 Tutorial Two © Bentley Systems.Tutorial 2 The type of model displayed depends on which characteristics you select from the check boxes at the top of the screen (Node Number. Experiment with these buttons to become familiar with their functions. Use the buttons on the left side of the screen to manipulate your view of the model (e. rotate. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0. T2:34 . zoom-in or out).g. pan. Member Number. This is where you enter all load information.. Step 14 Click the Loads tab to display the Loads screen. as shown in Figure T2-24 Remove a selected group from the Selected Groups list by clicking the left-arrow button (<-). Click the right-arrow button.0. T2:35 . Next. Repeat the above steps until all required load groups are entered. Highlight G . Inc. To remove all groups from the Selected Groups list. as shown in Figure T1-16. Repeat the above steps until all the required loads have been entered. add the load groups to the Selected Groups list: 4. select the Load Groups/Limit States item from the Libraries menu.Tutorial 2 Figure T2-24 Loads Tab Screen Notice there are two lists of loads: Load Types and Available Groups. 6. 5. The load type will appear in the list under Selected Loads.Dead Load in the list under Load Type. add the load types (shown in Figure T2-24) to the Selected Load list: 1. To define groups.0 Tutorial Two © Bentley Systems. Load Types are preset individual loads that you can add to the pier structure for calculations. Available groups are preset load combinations that can be added to the pier structure. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. First. 2. Click the right-arrow button. The load group will appear in the list under Selected Groups. 3. Step 15 LEAP® Bridge Enterprise v13. click the <== button. Highlight Service Group I in the list under Available Groups. live load. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.Tutorial 2 Auto-generate loads for dead load. wind load on structure. as shown in Figure T2-25 Figure T2-25 Loads: Load Data Screen 2. and wind load on live load. as shown in Figure T2-26.0. T2:36 . 1. Inc. LEAP® Bridge Enterprise v13. Highlight G1 in the Selected Loads list and click Edit. Click Generate to bring up the Auto Load Generation: Structure G screen.0 Tutorial Two © Bentley Systems. The Loads: Load Data screen will display. (Note that the auto load generation screen will be specific to the load type selected). select the check boxes to include slab and girders and select the option “use simple span distribution for barrier and wearing surface. Inc.Tutorial 2 Figure T2-26: Autoload generation of dead load screen 3. You can use select import load from superstructure. If you wish to generate the load instead of importing load. Click OK to return to the Loads screen. Click Generate. The program will automatically generate the loads and return to the Loads: Load Data screen as shown in Fig T2-27. LEAP® Bridge Enterprise v13.0. 4. T2:37 . No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0 Tutorial Two © Bentley Systems. Tutorial 2 Step 16 Auto generate live load: 1. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Click Generate to activate the Auto Load Generation: Live Load screen.0 Tutorial Two © Bentley Systems. Inc. T2:38 . Highlight (Q+Qim)1 in the Selected Loads list and click Edit to bring up the Loads: Load Data screen. 2. as shown in Figure T227 LEAP® Bridge Enterprise v13.0. Tutorial 2 Figure T2-27 Auto Load Generation: Live Load Screen - Prior to Auto Generation 3. In the longitudinal reaction area, select the option “Import Superstructure Reaction” and define max truck load as 986.238 kN for braking force calculation 4. Instead of importing live load from superstructure, you can select IRC vehicles and generate live load reaction within RC-PIER as well. 5. If you select IRC rule, program will automatically select the vehicles and number of lanes based on bridge width. 6. Click Generate. The program will automatically generate the loads and return to the Live load screen as shown in T2-28. LEAP® Bridge Enterprise v13.0.0 Tutorial Two © Bentley Systems, Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T2:39 Tutorial 2 7. If desired, input a name in the Name text box (e.g., llcase1) and a description in the Description text box. Figure T2-28 Auto Load Generation: Live Load Screen - Post to Auto Generation 8. Click OK and return to the Loads screen. Note that when you return to the Loads screen after generating the live loads, RC-PIER adds (Q+Qim)2, (Q+Qim)3, (Q+Qim)4, .. (Q+Qim)38, load cases to the list under Selected Loads. The Loads screen will look similar to Figure T2-29 LEAP® Bridge Enterprise v13.0.0 Tutorial Two © Bentley Systems, Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T2:40 Tutorial 2 Step 17 1. Highlight W1 in the Selected Loads list and click Edit to bring up the Loads: Load Data screen. 2. Click Generate to open the Auto Load Generation: Wind on Structure screen, as shown in Fig T230 Fig T2-30 Auto Load Generation: Wind on Structure Screen 3. Select multiple angle check box and 30 & -30 from Start and End Wind Angle list. 4. Enter 0 in the Elevation above Which Wind Load Acting field. 5. Select Plain terrain as bridge location. Use the Default Wind Pressure check box. (Note that when this option is selected, the remaining fields are grayed out.) 6. Click Generate. The program automatically generates the loads and returns to the Loads: Load Data screen. 7. Click OK and return to the Loads screen. Step 18 Auto-generate the Wind Load on Live Load: 1. Highlight WL1 in the Selected Loads list and click Edit to bring up the Loads: Load Data screen. 2. Click Generate to open the Auto Load Generation: Wind on Live Load screen, as shown in Figure T2-31 LEAP® Bridge Enterprise v13.0.0 Tutorial Two © Bentley Systems, Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T2:41 4.Click Generate. The program automatically generates the loads.0. 5. Click OK and return to the Analysis screen. This screen is used to perform an analysis and also specify various factors relating to the analysis and design. 5. Click A/D Parameters to open the Analysis/Design Parameters screen and input the values for permissible stresses as shown in Figure T2-32. Inc. LEAP® Bridge Enterprise v13. T2:42 . No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. 4. Step 19 Click the Analysis tab to activate the Analysis screen.545 m in the Length of Live Load field.Tutorial 2 Figure T2-31 Auto Load Generation: Wind on Live Load Screen 3. Select 30 & -30 from the Wind Angle list and leave 17.0 Tutorial Two © Bentley Systems.Click OK and return to the Loads screen. Inc.Tutorial 2 Figure T2-32 Analysis/Design Parameters Screen Click Run Analysis to perform the analysis for the pier structure based on all the data entered up to this point. as shown in Figure T1-25.0 Tutorial Two © Bentley Systems. Specify the type of results to view by using the lists at the top of the screen. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. LEAP® Bridge Enterprise v13. The results will appear on the screen.0. T2:43 . use the scroll bar on the right side of the screen to view all the results. If necessary. Tutorial 2 Figure T2-33 Analysis Tab Screen (After Analysis is Performed) Print the analysis results by right-clicking in the results area of the Analysis screen and selecting the Print. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. The following steps illustrate the auto design feature. as shown in Figure T2-34 Use this screen to have RC-PIER design the cap.0. Step 20 Click the Cap tab to open the Cap screen. Inc. LEAP® Bridge Enterprise v13. T2:44 .0 Tutorial Two © Bentley Systems. Clicking Auto Design or you can manually input the cap design. 2. we will define the reinforcement manually instead of using autodesign. Select Cap from the Selection list. T2:45 . Define top and bottom reinforcement using MS32-GR1 as shown below in Figure T2-35.0.0 Tutorial Two © Bentley Systems. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.Tutorial 2 1. Inc. LEAP® Bridge Enterprise v13. For this example. 4.Tutorial 2 Figure T2-35 Design Cap Screen 3. Inc. T2:46 .0. Click Print to print the design summary.0 Tutorial Two © Bentley Systems. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Click Design Status . 6.Cap screen to review the flexure. LEAP® Bridge Enterprise v13. Click OK. click Design Status to display the cap summary. Select MS12. as shown in Figure T2-36. shear and torsion design.GR1 from the Stirrup Size list. 7. Click Close (or the X in the top right corner of the screen) to exit this screen and return to the Cap screen. 5. 4 from the nlegs list and specify 120 mm in the spacing increment box. To see a design summary of the cap. Review the cap design and modify the reinforcement/stirrup definition. 0 Tutorial Two © Bentley Systems.Cap Screen (In Enhanced Report Format) To see a graphical representation of the cap. Inc. LEAP® Bridge Enterprise v13.Tutorial 2 Figure T2-36 Design Status . it has two sides: left and right. Step 21 Click the Column tab to open the Column screen. T2:47 . as shown in Figure T2-37 Either manually input the column reinforcement or have the program automatically design it. click Sketch. Note:The printout for shear/torsion design is given in terms of the sides of a section.0. the Auto Design feature is used. For the section other than the start or end of a span. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. The start and end of the span have only one side. For this tutorial. 0. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Inc. 2. Select 1 from the Column# list and Ties from the Lateral Bar Type list.Tutorial 2 Figure T2-37 Column Tab Screen 1.0 Tutorial Two © Bentley Systems. Click Auto Design to bring up the Design Column screen. as shown in Figure T2-38. Figure T2-38 Design Column Screen LEAP® Bridge Enterprise v13. T2:48 . Click Close or the X in the top right corner of the screen to exit this screen and return to the Column screen. as shown in Figure T2-39.0. 4.0 Tutorial Two © Bentley Systems. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. To see a design summary of the selected component. The Design Status . Click Print to print the design summary or click Sketch to see a graphical representation of the selected column. Select the desired footing from the footing list. click Design Status on the Column screen to activate the Design Status . Step 22 1.Tutorial 2 3. Select MS 32-GRI from the Bar Size list and MS6-GR1 from the Stirrup Size list. T2:49 .Column screen. Click OK. Inc. 5.Column screen will be displayed. The footing tab screen shows as follows: LEAP® Bridge Enterprise v13. Define hook at 90 degrees on both sides.Footing screen will immediately display.Tutorial 2 Figure T2-40 FootingTab Screen 2. Similar to cap and column.0 Tutorial Two © Bentley Systems. Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Click on Autodesign and select the MS-28 rebar size from the list. T2:50 . LEAP® Bridge Enterprise v13. Click Close or the X in the top right corner of the screen to exit this screen and return to the footing screen. 3. user can click Autodesign or manually define reinforcement. The Design Status .0. Figure T2-41 Autodesign footing screen 4. Tutorial 2 Figure T2-42 Footing design status screen Step 23 LEAP® Bridge Enterprise v13.0.0 Tutorial Two © Bentley Systems, Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T2:51 Tutorial 2 Select Diagrams from the Show menu to activate the Diagram screen, as shown in Figure T2-42 Experiment with the lists and buttons to become familiar with the options of this feature. Step 24 To print the output of the project, select Print from the File menu and the Print screen will display. Select the appropriate options and click OK. Figure T2-43 Footing design status screen This completes Tutorial 2. LEAP® Bridge Enterprise v13.0.0 Tutorial Two © Bentley Systems, Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T2:52 Tutorial 4 Tutorial 3 Single Span Slab Bridge with Abutment. Tutorial 3 and then on to detailed design using the box bridge analysis and design software CONBOX. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T3:1 .Tutorial 3 Single span slab bridge with abutment This tutorial is a step by step walkthrough of the analysis and design of a single span cast-in-place concrete slab bridge. Figure W-1: Bridge superstructure cross-section view Figure W-2: Bridge side elevation showing span information LEAP® Bridge Enterprise v13. and an abutment using LEAP Bridge. followed by detailed step by step design and analysis of the reinforced concrete sub-structure using RC-PIER. Inc. The example illustrates the full life cycle work flow starting with the basic modeling in ABC Wizard.0 Tutorial Three © Bentley Systems.0. two crash barriers. HYSD Steel. T3:2 . at 28 days: 35 MPa Weight: 2500 kg / m3 LEAP® Bridge Enterprise v13. strength.5 m. Column and Footings) Strength. Substructure Concrete Properties (Cap. . initial 25 Mpa Weight: 2500 kg / m3 Rebar Properties Flexure and Shear Steel: Fe415. Inc. Superstructure Concrete Properties fck. Maximum number of design lanes = 2. One lane of class 70R or two lanes of Class A. at 28 days: 35 MPa fci. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0. Dead Load on Superstructure: Self-weight of wearing surface.0 Tutorial Three © Bentley Systems. and two footpaths (left and right) Live Load IRC Loading: Carriageway width = 7..Tutorial 3 Figure W-3: Abutment views Bridge Data 2. Tutorial 3 Concrete Strength Stem wall Footings Modulus of Elasticity Concrete Density Stem wall Footings Steel Yield Strength Stem wall Footings Modulus of Elasticity Superstructure Parameters Number of lanes Type (Reinforced Concrete Slab) Slab Height Slab Section Area Slab Inertia Ixx Slab Inertia Iyy Slab Ycg Curb Height Total number of spans Span Information Bridge Overall Width. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.02e+007 mm4 = 4125+011 mm4 = 425 mm = 914. Span 1.0 Tutorial Three © Bentley Systems. ft Span Length.000 MPa =3 = 850 mm = mm2 = 1.4 mm 1 12 m 12 m 12. ft Curb to Curb Distance. Inc.625 m LEAP® Bridge Enterprise v13. ft fck = 35 MPa fck = 35 MPa Ec = 33722 MPa 2500 kg/m^3 2500 kg/m^3 fy = 415 MPa fy = 415 MPa Es = 200.0. T3:3 . Figure W-4: Project tab information Click the Geometry tab. If the information for end abutment is same. the optional information can also be input at this stage. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. LEAP® Bridge Enterprise v13.0 Tutorial Three © Bentley Systems. T3:4 . The Wizard can be launched simply by clicking on the ABC Wizard icon in the toolbar. If detailed information about the geometry of the bridge including the alignment information.Tutorial 3 Start of Tutorial Start the LEAP Bridge software application by clicking on Start > All Programs > Bentley > LEAP Bridge.0. Inc. The units are preset to SI (Metric) units for the IRC code. After completing the superstructure input. The input is fairly straightforward and can be completed quickly by simply inputting the values for various input fields. Begin entering the information shown in Figure W-5 to enter bridge superstructure cross-section and span details. click on Next to move to step 2 and input information for the stem wall abutment as shown in Figure W-6 shown below. cross-section and vertical profile is available. and start the modeling of the bridge using the ABC (automated bridge creator) Wizard. Set the Design Code to ‘India_IRC’ and fill the project information as shown in the figure below. simply use the copy button to copy the current abutment information to end abutment. Superstructure details LEAP® Bridge Enterprise v13. T3:5 .0 Tutorial Three © Bentley Systems. Step 1. Inc.0. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.Tutorial 3 Figure W-5: ABC Wizard. the status window will reflect the same.0. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. and you can press the finish button to complete the initial description and view the generated 3D model in the Geometry tab of LEAP Bridge as shown in Figure W-9. click on the Pier drop down in the top left hand corner of the window.Tutorial 3 Figure W-6: ABC Wizard. the user will be able to override these default settings in the component programs. Simply copy the abutment properties to the end abutment (Number 2) using the copy tool available on this screen. T3:6 . LEAP® Bridge Enterprise v13. Inc. If all information for these three steps in ABC wizard is accurate.0 Tutorial Three © Bentley Systems. Step 2. These values will be used as defaults when data is transferred from LEAP Bridge to CONBOX or RC-PIER. Next enter the values for the material properties as shown in figure W-8 below. Substructure details (Start Abutment) Once the input for the abutment is complete. Once the initial model is built with these properties. LEAP® Bridge Enterprise v13. Step 3. zoom. Inc. Materials. Figure W-8: ABC Wizard.Tutorial 3 Now that the initial model has been created.0. pan operations by either using the right mouse menu (context sensitive menus) or simply accessing the appropriate functions on the tool bar. T3:7 . you could play around with some of the options available for rotation.0 Tutorial Three © Bentley Systems. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.xml” to save the file. and the click on the CONBOX button.Tutorial 3 Figure W-9: 3D Bridge model in LEAP Bridge. Next click on the SuperStructure tab.0 Tutorial Three © Bentley Systems. Inc. Let us now complete the input process in CONBOX and complete the design of the superstructure. Now is a good time to save the input. Click on File/Save and provide a name “Tutorial 3. T3:8 .0. all of the pertinent data is automatically transferred to CONBOX and CONBOX is displayed as shown in Figure W-10 below. LEAP® Bridge Enterprise v13. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T3:9 . the definitions for Geometry in ABC Wizard were quite sufficient and no further changes are required in the Geometry tab for Alignment. Click OK to close this dialog and view the updated section view showing the 2D graphics for the barrier and footpath on the cross-section. However we do wish to add the superimposed dead loads such as the crash barriers. Pier. footpath and wearing surface. LEAP® Bridge Enterprise v13. Make sure to hit the Include All button.Tutorial 3 Figure W-10: CONBOX Project tab with information completed automatically. so simply click on the Geometry tab. Since our demonstration model is quite simple.0. and all of the dead loads are automatically considered in the appropriate load groups for analysis. Layout and Cross-section. Inc. and then click on the Crash Barriers button.0 Tutorial Three © Bentley Systems. Inc.Tutorial 3 Figure W-11: Crash Barriers definition screen LEAP® Bridge Enterprise v13. T3:10 . No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0 Tutorial Three © Bentley Systems.0. move to the loads and analysis tab in CONBOX. T3:11 . By default all of the initial and final load cases. Inc. since we don’t have PT tendons in this slab. Now. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0 Tutorial Three © Bentley Systems. Note that some loads such as temperature gradient and construction will need to be manually deleted from this list of loads.0. to focus on workflow for this particular example. the appropriate loads and factors all per IRC have already been predefined as shown in Figure W-14 and W-15. LEAP® Bridge Enterprise v13.Tutorial 3 Figure W-12: Updated 2D graphics of bridge cross-section after adding crash barriers etc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.) or use the option in the right-click menu to automatically add the load to all load combinations. etc. the right hand side tree with the BR01 (current box girder bridge) Loads are the library of loads on this particular bridge. Ultimate I.0 Tutorial Three © Bentley Systems. Inc. and they can be edited here.Tutorial 3 Figure W-14: Load Combinations (for Initial) In the figure above.0. and all instances of those particular loads are automatically updated wherever they are used. ( Service I. To use these loads simply drag and drop them over to the left hand pane in the appropriate Case (initial or final) and Combination. LEAP® Bridge Enterprise v13. T3:12 . 0 Tutorial Three © Bentley Systems. LEAP® Bridge Enterprise v13.Tutorial 3 Figure W-15: Expanded view of BR01 Loads in Library. T3:13 . Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0. 0 Tutorial Three © Bentley Systems.Tutorial 3 Figure W-16: Load Combinations (for Final) You can verify and if required edit and modify the load factors for each combination under both initial and final loads. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0. Inc. LEAP® Bridge Enterprise v13. Simply double click on the Load combination name in the left hand side window to bring up a dialog which looks similar to the screen shown in Figure W-17. T3:14 . the Run Analysis button turns into View Analysis and you could look at the detailed reports (either as graphs or tabular data). Inc.0. shown here for “Service I Final”. T3:15 . No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0 Tutorial Three © Bentley Systems. Once the Analysis is complete. moving the trucks along the bridge and then performing an automatic transverse distribution of loads using the Courbon’s method. Click on the Run Analysis button on the Loads/Analysis button to run the actual longitudinal analysis.Tutorial 3 Figure W-17: IRC Load Combination Factors dialog. LEAP® Bridge Enterprise v13. T3:16 .Tutorial 3 Figure 18: Results on the Design Tab LEAP® Bridge Enterprise v13. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0 Tutorial Three © Bentley Systems. Inc.0. select Bar size MS25-GR1 and perform an autodesign. Program comes up with a rebar pattern as shown in Figure W-20. LEAP® Bridge Enterprise v13. T3:17 .0 Tutorial Three © Bentley Systems. Inc.Tutorial 3 Figure W-19: Design Parameters dialog In the main menu click on Settings > Design Parameters to bring up the dialog showing the design parameters per IRC. Review the settings here.0. click on Rebar and in the Dialog which comes up. as shown in Figure W-19. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. On the Design Tab. but since no changes are required. click cancel to close this screen and go back to the program. Notice that since we are only working with Reinforced concrete. Click OK to accept and close the dialog. some of the fields for PT concrete are locked. Tutorial 3 Next click on the Stirrups dialog and select MS12-GR1 for the stirrup size. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Program comes up with a stirrup schedule which you could clean up to make it more construction-friendly and click OK to accept the reinforcement and also optionally copy this back to the model. You can view the results in CONBOX. by simply clicking on the Print icon in the toolbar to bring up the dialog shown below in Figure W-21. Inc. 6 for number of legs and 150mm for spacing and do an auto design.0.0 Tutorial Three © Bentley Systems. T3:18 . LEAP® Bridge Enterprise v13. Inc.0.Tutorial 3 LEAP® Bridge Enterprise v13. T3:19 .0 Tutorial Three © Bentley Systems. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. See figure W-22 below.0.0 Tutorial Three © Bentley Systems. Now that the design of the superstructure is complete. Click OK to close CBX and transfer information back to the LEAP Bridge model for further processing of the substructure. T3:20 . LEAP® Bridge Enterprise v13. Notice now that the reinf.Tutorial 3 Figure W-21: Print dialog in CBX. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Inc. has been updated in the superstructure (visible when the transparency option is selected in the 3D view). No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. select AB01 in Abut/Pier list and then click on the RC-PIER button.Tutorial 3 Figure W-22: Rebar and representative stirrups in the 3D bridge model in LEAP Bridge. Click on save the project.0. T3:21 . Inc. all of the pertinent data is automatically transferred to RC-PIER and it is displayed as shown in Figure W-23 below. Let us now complete the input process in RC-PIER and complete the analysis & design of the substructure. Next click on the SubStructure tab. LEAP® Bridge Enterprise v13.0 Tutorial Three © Bentley Systems. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. we will continue with Stem wall as defined in ABC wizard in LEAP Bridge. Click on Abutment configuration. T3:22 . LEAP® Bridge Enterprise v13.0.0 Tutorial Three © Bentley Systems. Switch to Geometry tab and note that all the geometry information is filled in correctly. For this example.Tutorial 3 Substructure design Figure W-23: RC-PIER Project tab with information completed automatically. Inc. we need to define eccentric footing for stem wall.8 m as shown below. Click on Footing|Pile dialog and change the from column distance in z direction to 4.0.Tutorial 3 Figure W-24: Abutment configuration showing stem wall properties You can review the superstructure parameter information as imported from CONBOX. T3:23 . For this example. LEAP® Bridge Enterprise v13. Inc.0 Tutorial Three © Bentley Systems. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. 0. Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.Tutorial 3 you For this example. Click on bearing dialog and define the bearings at every 2m distance.0 Tutorial Three © Bentley Systems. T3:24 . we need to define the bearing locations. LEAP® Bridge Enterprise v13. Define 5 bearings. Click OK to accept these changes. The complete pier geometry can be reviewed in 3D view under geometry tab.0 Tutorial Three © Bentley Systems. Define 2nd bearing at 2 m from the previous bearing location. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.Tutorial 3 Figure W25: Bearing data Select single bearing line option. LEAP® Bridge Enterprise v13.0. Define the 1st bearing at 2 m from the cap left end. Inc. T3:25 . zoom in/out using the graphical options given below the 3D view. primarily you will consider dead. For this example.0 Tutorial Three © Bentley Systems. Select the dead load G & SG to import the load on pier1. wind and braking force. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0. live. Inc. move to load tab to define the load applied on pier and select the desired load groups as per IRC specifications. Select Dead load case (G) and click edit to open the load dialog. as shown in Figure W-28 LEAP® Bridge Enterprise v13. Click generate button to open the auto load generation options as shown in W-27 and select import load from superstructure option. Next. Select dead load (G) from the list of loads available and click to select it. T3:26 . You can switch to 2D view to copy or print the pier geometry.Tutorial 3 Figure W-26: 3D Graphical view of pier You can rotate. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T3:27 .0 Tutorial Three © Bentley Systems. LEAP® Bridge Enterprise v13.0.Tutorial 3 Figure W-27: Auto dead load generation dialog. Inc. Inc. LEAP® Bridge Enterprise v13. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0.Tutorial 3 Figure W-28: Dead load imported from superstructure Upon clicking “Generate” button will distribute the dead load on bearings as shown in Figure W-29.0 Tutorial Three © Bentley Systems. T3:28 . Tutorial 3 Figure W-29: Load case dialog Click OK to accept these values and close the dialog. In the similar way, select live load and select generate load. Keep the default IRC rule option and import the live load reactions for Class A, 70 R from superstructure as these are already computed during superstructure design as shown in Figure W-30. Depending on the carriageway width, program generates numerous live load combinations based on IRC 6-2000 specifications. Among these generated combinations, it isolates the most critical combinations producing the maximum effect in the individual members. On the same dialog, select the option to generate longitudinal forces. This will generate the breaking force for each combination. LEAP® Bridge Enterprise v13.0.0 Tutorial Three © Bentley Systems, Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T3:29 Tutorial 3 Figure W-30: Live load generation Click OK to accept the load cases. Note that, program has generated 7 critical live load combinations. You can click on “LL details” to check the details of each live load positioning. Note: You can edit the individual load case to check the bearing reaction, but if you click OK after editing, program erases the live load details descriptions. LEAP® Bridge Enterprise v13.0.0 Tutorial Three © Bentley Systems, Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T3:30 Tutorial 3 Figure W-31: List of selected loads Now, select wind load case (Ws) and click edit to generate the wind load forces on structures. Generate the wind load for multiple range of wind angle 30 to -30. You can generate the wind load force acting on live load simultaneously or independently. For this example, we will generate the wind on live load simultaneous by selecting wind acting on live load option. Depending on the bridge location, and pier elevation, correct wind pressure acting on substructure will be selected. LEAP® Bridge Enterprise v13.0.0 Tutorial Three © Bentley Systems, Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T3:31 Select “Yes” to allow program to generate the default load combinations. we will not make any changes and use the default parameters. For this example.0 Tutorial Three © Bentley Systems. Next. Click on Analysis and design parameter to check the permissible stress values. load groups. You can review the analysis results for each load case or for particular combination at each specific member node. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.Tutorial 3 Figure W-32: Wind load generation dialog Once all the required load cases are defined.0. T3:32 . move to analysis tab. Inc. select the Service I and Service IIIA. LEAP® Bridge Enterprise v13. program flags that location. T3:33 . shear and torsion design.Tutorial 3 Figure W-33: Analysis results dialog Now.0. Select MS32.0 Tutorial Three © Bentley Systems. design fails. which can be edited manually. This prompts the dialog to select the rebar size. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. If at any locations. Click on Design status to review the flexure. you are ready to design the individual components – the stem wall and footing according to IRC specifications. Program comes with its own reinforcement and stirrup schedule. Inc. Switch to stem tab and select Autodesign. LEAP® Bridge Enterprise v13.GRI and MS-6-GR1 for stirrup size. Use MS28-GR1. you can use Autodesign as explained earlier or manually define the reinforcement. design the footing. Select FTG03 from the available list and click Autodesign.Tutorial 3 Figure W-34: Stem design tab Similarly. T3:34 .0 Tutorial Three © Bentley Systems. You can design all the footing at the same time by checking the box for “Autodesign all “.0. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Inc. this dialog will be slightly different. For this example. In the footing design. For combined footing. user can define the reinforcement start and end location. LEAP® Bridge Enterprise v13. Depending on the footing type. we have defined spread footing and will be using Autodesign and use 90 degrees hook on both sides to check the design status. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0.Tutorial 3 Figure W-36: Footing design tab You can view the results in RC-PIER by simply clicking on the Print icon in the toolbar to bring up the dialog shown below in Figure W-37. Inc. T3:35 . LEAP® Bridge Enterprise v13.0 Tutorial Three © Bentley Systems. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Notice now that the reinf. LEAP® Bridge Enterprise v13. Click OK to close RC-PIER and transfer information back to the LEAP Bridge model.Tutorial 3 Figure W-37: Print dialog in RC-PIER. See figure W-38 below. has been updated in the substructure (visible when the transparency option is selected in the 3D view). T3:36 .0.0 Tutorial Three © Bentley Systems. Now that the substructure design is complete. Inc. Tutorial 3 Figure W-38: Abutment reinforcement display in 3D model of LEAP Bridge. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. LEAP® Bridge Enterprise v13.0 Tutorial Three © Bentley Systems. Inc.0. T3:37 . Tutorial 4 Tutorial 4 Two Span CIP Post Tensioned I-Girder Bridge . The example illustrates the full lifecycle work flow starting with the basic modeling in the ABC Wizard.0. please refer to other tutorials for details. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T4:2 . Figure W-1: Bridge superstructure cross-section view Figure W-2: Bridge side elevation showing span information LEAP® Bridge Enterprise v13. For the sake of brevity. followed by detailed design of Span 1 Girder 1 (S1G1) using CONBOX.Tutorial 4 Tutorial 4 Two-Span CIP Post-Tensioned I-Girder Bridge This tutorial is a step by step walkthrough of the analysis and design of a two-span cast-in-place posttensioned I-girder bridge using LEAP Bridge. the detailed step by step analysis and design of the abutments and pier is omitted from this example. Inc.0 Tutorial Four © Bentley Systems. Inc. T4:3 .0 Tutorial Four © Bentley Systems.Tutorial 4 Figure W-3: Bridge plan view showing span information Figure W-4: Pier front and side views LEAP® Bridge Enterprise v13.0. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. 667. T4:4 . at Initial stage (time of PT): 35 MPa fck. fp: 1. LowLax Ultimate Tensile Strength. . .9 mm Rebar Properties Flexure and Shear Steel: Fe415. at Intermediate stage: 37 MPa fck.6mm2 Duct diameter: D=105. Superstructure: Single-stage post-tensioned bridge. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0 Tutorial Four © Bentley Systems. .Tutorial 4 Bridge Data 3. . at Final stage (time of Live Load): 35 MPa Weight: 2400 kg / m3 Single Stage Post-tensioning Strand Properties Strand Type: 27T13. Concrete Properties Girder: fck. at Final stage (time of Live Load): 45 MPa Deck: fck. at Deck stage (Casting of Deck): 35 MPa fck.0. at Intermediate stage: 30 MPa fck. . Inc.860 MPa Area: 2. . at Deck stage (Casting of Deck): 0 MPa fck. at Initial stage (time of PT): 0 MPa fck. . Class 70R and Class A LEAP® Bridge Enterprise v13. . HYSD Steel Dead Load on Superstructure: 2 crash barriers (left and right) Live Load IRC Loading. Figure W-5: Project tab information Click the Geometry tab. After completing the superstructure input. T4:5 . click on Next to move to step 2 and input information for the drop cap multi-column pier as shown in Figure W-7. this optional information can also be input at this stage.Tutorial 4 Start of Tutorial Start the LEAP Bridge software application by clicking on Start > All Programs > Bentley > LEAP Bridge. The Wizard can be launched simply by clicking on the ABC Wizard icon in the toolbar.0. simply use the copy button to copy the current pier geometry to other piers. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. If detailed information about the geometry of the bridge including the alignment information. Set the Design Code to ‘India_IRC’ and fill in the general project information as shown in the figure below. cross-section and vertical profile is available. The default units are preset to SI (Metric) units for the IRC code. and start modeling the bridge using the ABC (automated bridge creator) Wizard. Inc. LEAP® Bridge Enterprise v13. If there are similar multiple piers. Begin entering the information shown in Figure W-6 related to the bridge superstructure cross-section and span details.0 Tutorial Four © Bentley Systems. The input is fairly straightforward and can be completed quickly by simply inputting the values for various input fields. Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0.Tutorial 4 Figure W-6: ABC Wizard. Superstructure details LEAP® Bridge Enterprise v13.0 Tutorial Four © Bentley Systems. Step 1. T4:6 . Simply copy the Abutment Number 1 properties to the end abutment (Abutment Number 2) using the copy tool available on this screen. Substructure details (Pier) Once the input for the pier is complete.0 Tutorial Four © Bentley Systems. Step 2. Change the selection to “Abutment” and Number “1” and complete the input of abutment properties as shown in Figure W-8. LEAP® Bridge Enterprise v13. Inc. click on the Pier drop down in the top left hand corner of the window.Tutorial 4 Figure W-7: ABC Wizard. T4:7 . No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0. These values will be used as defaults when data is transferred from LEAP Bridge to CONBOX or RC-PIER.Tutorial 4 Figure W-8: ABC Wizard. LEAP® Bridge Enterprise v13. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. After the initial model is built with these properties.0 Tutorial Four © Bentley Systems. Substructure details (start abutment) Next enter the values for the material properties as shown in figure W-9 below. Inc.0. T4:8 . the user will be able to override these default settings in the component programs. Step 2. Step 3. you could play around with some of the viewing options such as rotation. Materials. zoom. Now that the initial model has been created. the status window will reflect the same. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.Tutorial 4 Figure W-9: ABC Wizard.0 Tutorial Four © Bentley Systems. T4:9 . and pan by either using the right mouse menu (context sensitive menu) or simply accessing the appropriate functions on the tool bar. Inc.0. and you can press the finish button to complete the initial description and view the generated 3D model on the Geometry tab of LEAP Bridge as shown in Figure W-10. If all information for these three steps in ABC wizard is accurate. LEAP® Bridge Enterprise v13. xml” to save the file.0. All of the pertinent data is automatically transferred to CONBOX and CONBOX is displayed as shown in Figure W-11 below. Let us now complete the input process in CONBOX and complete the design of the superstructure.0 Tutorial Four © Bentley Systems. Click on File/Save and provide a name “workshop1. and the click on the CONBOX button. T4:10 . No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Next.Tutorial 4 Figure W-10: 3D Bridge model in LEAP Bridge. Now is a good time to save the input. Inc. LEAP® Bridge Enterprise v13. click on the SuperStructure tab. 0. Inc. The bearing offset with respect to the centerline of supports (Abutments and Piers) can be specified in the Bridge Component Layout dialog box by assigning values to LtBrgOff and RtBrgOff fields. T4:11 .Tutorial 4 Figure W-11: CONBOX Project tab with information completed automatically. The length of the Abutment can also be specified in this dialog. the length of the Piers can be defined in the Pier and Column Definition dialog box (Figure W-12). LEAP® Bridge Enterprise v13. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0 Tutorial Four © Bentley Systems. material properties for the deck and the girders at the various stages (Initial. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0. Deck.0 Tutorial Four © Bentley Systems. Intermediate. LEAP® Bridge Enterprise v13. T4:12 . Inc. and Final) and the girder type and the section variation at the ends of the girders – End Block and Taper Section details – can be specified in the Span Definition dialog box under the Geometry tab (Figure W-13).Tutorial 4 Figure W-12: Bearing Offset and Abutment Length definition The deck and the haunch thicknesses. Inc.0.0 Tutorial Four © Bentley Systems. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.Tutorial 4 LEAP® Bridge Enterprise v13. T4:13 . 0 Tutorial Four © Bentley Systems. Click on the Define buttons to view and change the dimensions. clearance. Click OK to close this dialog and view the updated section view showing the 2D graphics for the (Figure W-14). and section variation definition Superimposed dead loads such as the crash barriers.Tutorial 4 Figure W-13: Deck and haunch thickness. girder type. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. The dead load of the Items marked Include are automatically considered in the appropriate load groups for analysis. LEAP® Bridge Enterprise v13.0. footpath and wearing surface can be automatically added by specifying their sizes and material properties by clicking on the Crash Barriers button on the Geometry tab. material properties for deck and girders. Inc. T4:14 . 0.Tutorial 4 LEAP® Bridge Enterprise v13. T4:15 . Inc.0 Tutorial Four © Bentley Systems. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Footpath. LEAP® Bridge Enterprise v13. The Tendon Type specified is 27T13. and Railing definition Next click on the Model tab. Wearing Surface. and then the Tendon button and input the information for the tendon in Girder 1 in Span 1. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.Tutorial 4 Figure W-14: Crash Barriers. T4:16 .0. Inc.0 Tutorial Four © Bentley Systems. Tendons for all girders in all spans can be similarly specified (Figure W-15). T4:17 . LEAP® Bridge Enterprise v13.0 Tutorial Four © Bentley Systems. the appropriate loads and load factors all per IRC have already been predefined as shown in Figure W-16. Inc.0.Tutorial 4 Figure W-15: Tendon definition Click OK to close this screen and move to the Loads and Analysis tab in CONBOX. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. By default all of the initial and final load cases. duplication is avoided. T4:18 . LEAP® Bridge Enterprise v13. Intermediate. and they can be edited here. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Inc. Simply double-click on the Load Combination name in the left hand side window to bring up a dialog which looks similar to the screen shown in Figure W-17. the right hand side tree with the BR01 – Loads are the library of loads on this particular bridge. You can verify and if required edit and modify the load factors for each combination. The right-click menu option allows the user to automatically add a particular load defined on the right side to all load combinations on the left side. To use these loads simply drag and drop them over to the left-hand pane in the appropriate Case – Initial. and all instances of those particular loads are automatically updated wherever they are used.0. if a load is already present in any load combination.0 Tutorial Four © Bentley Systems. Deck.Tutorial 4 Figure W-16: Load Combinations (for Final) In the figure above. etc. Ultimate I. and Final – and the appropriate Combination – Service I. LEAP® Bridge Enterprise v13. T4:19 .0. temperature loads. the Run Analysis button turns into View Analysis and you could look at the detailed reports (either as graphs or tabular data). No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. for the dead loads. and the moving live loads defined under the Loads/Analysis tab.Tutorial 4 Figure W-17: IRC Load Combination Factors dialog. shown here for “Service I Final” Click on the Run Analysis button on the Loads/Analysis button to run the longitudinal analysis. See Figure W-18.0 Tutorial Four © Bentley Systems. Inc. Once the Analysis is complete. detailed design results can be viewed in tabular or graphics format by clicking on the Design Results button on the Design tab (Figure W-20). See Figure 19.0 Tutorial Four © Bentley Systems. T4:20 . LEAP® Bridge Enterprise v13. Please select All Spans and All Girders if you would like to automatically export the girder reactions to RC-PIER. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0. Additionally. Inc.Tutorial 4 Figure W-18: View Analysis Results Notice also that the program automatically switches you to the design tab. provided and also the initial and final concrete strengths required and provided as shown in Figure 18. and shows the P-jack required vs. Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. T4:21 .Tutorial 4 Figure 19: Results on the Design Tab LEAP® Bridge Enterprise v13.0 Tutorial Four © Bentley Systems.0. Inc. T4:22 .0.0 Tutorial Four © Bentley Systems. Here Permissible stresses and other design requirements can be specified. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. as shown in Figure W-21. LEAP® Bridge Enterprise v13.Tutorial 4 Figure 20: Detailed design results in the Design Results dialog Click on Settings > Design Parameters in the main menu to bring up the dialog showing the design parameters per IRC. 0 Tutorial Four © Bentley Systems.0. 2 for number of legs and 150 mm for spacing and do an auto-design. T4:23 . LEAP® Bridge Enterprise v13. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. Inc. In this example. the specified tendon provides adequate flexural capacity and as such no additional mild steel is required. Similarly mild steel required in addition to the tendons can be automatically designed using the Rebar dialog on the Design tab.Tutorial 4 Figure W-21: Design Parameters dialog On the Design tab click on the Stirrups button and select HY12-GRII for the stirrup size. Program comes up with a stirrup schedule which you could clean up to make it more construction friendly and click OK to accept the reinforcement and also optionally copy this back to the model (Figure W-22). Inc. T4:24 .0.Tutorial 4 Figure W-22: Auto-design in Stirrups dialog You can view the results in CONBOX. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher. by simply clicking on the Print icon in the toolbar to bring up the dialog shown below in Figure W-23 LEAP® Bridge Enterprise v13.0 Tutorial Four © Bentley Systems. Inc. Select “Update LEAP Bridge Model” to transfer the information and the reactions back to the LEAP Bridge model. Once the model updated in LEAP Bridge the model information and the reactions from computed in CONBOX will be available for analyzing and designing the abutments and the pier using RCPIER. T4:25 .0. close CONBOX via File/Exit or by clicking on the “X”.Tutorial 4 Figure W-23: Print dialog for creating and printing reports Now that the design of the superstructure is complete. For transferring all necessary information. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.0 Tutorial Four © Bentley Systems. please select All Spans and All Girders for running the analysis in CONBOX before updating the LEAP Bridge model. LEAP® Bridge Enterprise v13. Tutorial 4 The designed reinforcement can be seen in the Design tab of LEAP Bridge – visible when the transparency option is selected in the 3D view. Figure W-24: Tendons and representative stirrups in the 3D bridge model in LEAP Bridge LEAP® Bridge Enterprise v13. See figure W-24.0.0 Tutorial Four © Bentley Systems. T4:26 . Inc. No part of this user manual may be reproduced in any form or by any means without the written permission of the publisher.