LEAPBridge Tutorials

LEAP® BRIDGE Bridge Geometry, Substructure & Superstructure

Volume II - Tutorials

Version 09.00.00

DAA038530-1/0001

LEAP® BRIDGE USER MANUAL – Volume I

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DISCLAIMER

Although this program has been written and tested by Bentley Systems, Inc., no warranty, expressed or implied, is made as to the accuracy or functioning of the program and related program material. In no event will Bentley System, Inc. be liable for any damages, including, without limitation, incidental and consequential damages and damages for lost data or profits, arising out of the use of or inability to use the licensed program.

Table of Contents

Chapter T Tutorial Sessions

Tutorial T1 3-Span Precast I-Girder

Superstructure Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T1-4

Substructure Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T1-5

Start of Tutorial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T1-6

Tutorial T2 2-Span CIP PT Box Girder Bridge

Problem Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T2-3


Tutorial T3 3-Span CIP R/C Slab Bridge

Problem Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T3-3


Index

LEAP© Bridge v09.00.00 TOC-i©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.

TOC--ii LEAP© Bridge v09.00.00©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.

LEAP© Bridge v09.00.00 Volume II©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.

Chapter

T
Tutorial Sessions
The chapter consists of tutorial sessions for LEAP Bridge. These tutorials are designed to familiarize you with the

capabilities of the program through a “hands-on” approach.

Each tutorial takes you through an entire design session, screen-by-screen. Upon completing these tutorials, you should be familiar with most of the features in LEAP Bridge. This chapter includes three tutorials.

Table T-1

Tutorial 1: 3-Span Precast I-girder Bridge 72-inch Bulb Tee Girder Design (LRFD) (U.S. Units)

You will learn: - How to define a multi-span prestressed girder bridge.

- How to design superstructure and piers via component programs.

- How to obtain geometry and design reports.

Tutorial 2: 2-Span CIP PT Box Girder

You will learn: - How to define a multi-span cast-in-place post-tensioned box girder bridge.

- How to design the bridge superstructure and required PT.

- How to obtain geometric and design reports.

Tutorial 3: 3-Span CIP R/C Slab

You will learn: - How to define a multi-span cast-in-place reinforced concrete haunched slab bridge.

- How to design bridge superstructures and piers.

- How to obtain geometric and design reports.

T-1

Tutorial SessionsT

T-2 LEAP© Bridge v09.00.00 Volume II©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.


Tutorial

T1
3-Span Precast I-Girder
This tutorial illustrates some of the basic features of LEAP Bridge. It takes you through a LEAP Bridge session, step-by-step, demonstrating the design of a precast/prestressed bridge beam using the AASHTO LRFD design code. In this tutorial, you will be designing beam 2 of span 1 of a three-span continuous bridge.

The information for Tutorial 1 is contained in a LEAP Bridge data file called “Tutor1.xml” and the folder called “Tutor1.” As an alternative to inputting all the information from scratch, as directed in this tutorial, you can load this file and only work on the sections that you wish. To load this file, select Open from the File menu. Move to the LEAP Bridge\Examples subdirectory, if it is not already showing, and select the file “Tutor1.xml.”

Diagrams

Figure T1-1 Elevation View

The superstructure and substructure information are defined in CONSPAN and RC-PIER, and in this case are saved in previous files. This session shows how this information is transferred to LEAP Bridge for full bridge description.

T1 -1

T1

Figure T1-2 Cross-Section View

Figure T1-3 Span Data

Figure T1-4 Topping Data

Span 2Span 1 Span 3

117'-0"

CL LC LCL

L

C

C

117'-0" 117'-0"

115'-0" 115'-0"115'-0"

(Brg. to Brg.)

( Pier to Pier)

(Brg. to Brg.)

( Pier to Pier)

(Brg. to Brg.)

( Pier to Pier)

116'-0"(Precast Length) (Precast Length)

116'-0"

0'-6"( Pier Precast End )

0'-6" 0'-6"(Precast Length)

116'-0"Pier Pier Pier P

CL CL CL

8" Deck Thick ness

BT-72

1/2"Haunch Thickness

Haunch Width42"

T1 -2 LEAP© Bridge v09.00.00 Volume II©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

Figure T1-5 Pattern for Tutorial 1

Symmetrical about midspan

Depress Point.4L = 46'

L/2 = 57.5'

Li/2 = 58.0'

a) Elevation

b) End Pattern c) Midspan Pattern

Straight Strands

Draped Strands

2 @ 10.5"

2 @ 68.5"

4 @ 8.5"

2 @ 66.5"

8 @ 6.5"

2 @ 64.5"

12 @ 4.5"

2 @ 62.5"

12 @ 2.5"

2 @ 60.5"

Beam End

LEAP© Bridge v09.00.00 Volume II T1 -3©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

Superstructure Data

Concrete Properties

Strength

Precast, release 5 ksi

Precast, 28 days 6 ksi

Cast-in-place topping, 28 days 3.5 ksi

Density, all concrete 150 pcf

Strand Properties

Strand Type 1/2” - 270 K - Low relaxation (Es = 28,000 ksi)

Two-point depressed pattern, depression point at 0.4L

Rebar Properties

Grade 60 rebar

Prestress Loss Information

Calculation Method AASHTO LRFD

Hours to release 18

Relative humidity 75%

Live Load

HL-93

Dead Load

On precast 0.180 klf, due to stay-in-place forms

Additional Dead Load

On composite 0.0305 ksf (applied over 51.0 ft.), due to future wearing surface


T1

Substructure Data

Concrete Strength

Cap 4000 psi

Columns 4000 psi

Footings 4000 psi

Modulus of Elasticity 3834 ksi

Concrete Density

Cap 150 pcf

Columns 150 pcf

Footings 150 pcf

Other Parameters

Crack Control Factor z = 170 kips/in

Pier Configuration

Cap: Length × Height × Depth = 51 ft × 54 in × 54 in

Start Elevation = 92.79 ft

End Elevation = 92.79 ft

Factor of Reduced Moment of Inertia = 1.0 (non-cracked section)

Columns: Circular, Fixed at base

Column Height = 20 ft

Diameter = 36 in

Factor of Reduced Moment of Inertia: = 1.0 (non-cracked section)

Wind on Live Load

Wind Angle = +30°

Footing Surcharge

Footing = 0.200 ksf


T1

Start of Tutorial

Start LEAP Bridge. By default, the program is installed in Programs/LEAP Software. To open, click Start > Programs> LEAP Software > LEAP BRIDGE.

Step 1

The Project screen will now be displayed, as shown in Figure T1-6. In the Project tab, enter the general information in the fields as shown in Figure T1-6. From the File menu select Save As and save your data as “Tutor1.xml” in a directory of your choice.

Figure T1-6 Project Tab Screen


T1

Step 2

Click the Geometry tab to display the Geometry screen. At this time the bridge is not defined, and nothing is shown.

Click the Superstructure tab to display the bridge superstructure. Once again, the superstructure is undefined. Click the CONSPAN button to invoke CONSPAN.

Once in CONSPAN, open the file called “T1_CN.csl,” or enter the superstructure definition. Refer to the CONSPAN User Manual for data entry in CONSPAN. Refer to the CONSPAN User Manual for analysis and design of the superstructure, and complete the design of girder number 2 in span 1 (see Tutor 1 of CONSPAN for the LFD version of this problem). Exit CONSPAN and answer Yes to the prompt for saving the data to “Tutor1.xml.” Answer Yes to the question “Would you like to generate the reports now?” At this time, you will have the bridge superstructure views on the Superstructure tab; see Figure T1-7.

Figure T1-7 Superstructure Tab


T1

Step 3

Click the Substructure tab. Although PR01 is selected, it is undefined at this time. Click the RC-PIER button to invoke the program. Once in RC-PIER, open the file called “T1_RCP.rcp,” or enter the substructure definition. Refer to the RC-PIER User Manual for data entry in RC-PIER. Refer to the RC-PIER User Manual for pier analysis, and design of cap. column and footings. Exit RC-PIER and answer YES to the prompt for updating the file “Tutor1.xml.” Answer Yes to the prompt “Would you like to generate the reports now?” Select PR02 from the drop-down list and press the RC-PIER button to invoke the program once again. Open the file “T1_RCP.RCP” and close it to save it in the current bridge. See Figure T1-8.

Figure T1-8 Substructure View


T1

Step 4

Click the Geometry tab and then click the GEOMATH button to invoke GEOMATH. Close the program and answer Yes to the prompt to update the file “Tutor1.xml.” The Geometry view now shows the abutments added by default by GEOMATH.

Figure T1-9 Geometry View

Step 5

On the Geometry tab you can click the Solid button to toggle to Transparent and zoom into the model to view reinforcement in the entire bridge. You can also select specific components in the tree view for which you want to look at reinforcement details in the lower 3-D view.


T1

Figure T1-10 Geometry View Showing Substructure Reinforcement

Step 6

Click the Reports tab. Select any desired set of reports and view the reports.



Tutorial

T2
2-Span CIP PT Box Girder Bridge
This LEAP Bridge tutorial takes you through a design, step-by-step, and illustrates some of the basic features of the program. In this tutorial you will be designing in accordance with the AASHTO LRFD Design Specifications.

The information for this tutorial is contained in an input file called “Tutor2.xml” and a folder called “Tutor2.” As an alternative to inputting all the information from scratch, as directed in this tutorial, you can load this file and only work on the sections you wish. To load this file, select the Open command from the File menu. Browse to the LEAP BRIDGE/Examples subdirectory, if it is not already showing, and select the file “Tutor2.xml.”

This tutorial is based on a 2-span (162ft. – 150ft.) example provided as CONBOX Tutor 2.


Figure T2-2 Typical Section (Post-Tensioning Ducts Not Shown)

T2-1

T2

Figure T2-3 Longitudinal Section and Post-Tensioning Layout

T2-2 LEAP© Bridge v09.00.00 Volume II©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

Problem Data

Concrete Material Properties

Design Specifications

AASHTO LRFD

Units

U.S. (English)

Loss Type/Material Model

Lump Sum 20 ksi

Horizontal Offset

0.00’

Pier Information

Type Integral

Column Size 4’ x 6’

Column Spacing 20’

Column Length 28’

P/T Tendons

Strand Type 1/2” - 270 ksi Low Relaxation (Es = 28,500 ksi)

Tendon Type Unknown

Friction Coeff. 0.20

Wobble Coeff. (1/ft.) 0.0002

CIP Box Girder Integral Pier

Unit Weight (PCF) 150 150

E-Modulus, E28 (ksi) 3600 3250

Poisson’s Ratio 0.20 0.20

Thermal Coeff. (°F) 6 10-6 --

fci (ksi) 3.5 --

fc (ksi) 4.0 3.25

Humidity (%) 70 --

Ultimate Creep Coeff. Program Calculated --

Ultimate Shrinkage Strain Program Calculated --

LEAP© Bridge v09.00.00 Volume II T2-3©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

Relaxation 0 ksi

Jack Type Left

Force Type Force

Left Force 7570 kips per tendon

Left Set 0.375

Right Force N/A

Right Set N/A

Live Load

HS20-44

Permit Trucks P5, P7, P9, P11 and P13

Live Load Distribution Factor

2.68 lanes Assume distribution factor based on full bridge.

Overall Deck Width lanes

Caltran’s Bridge Design Practice Manual, Figure 2, Section 3.4.3.3 (page 1-13)

Additional Dead Loads

A.C. Overlay Assume 35 psf; w = 0.035[37.5 - 2 (1.75)] = 1.190 klf

Concrete Barrier Assume 392 psf; w = 0.392 x 2 = 0.894 klf

Load Combinations

Dead Loads Superimposed Dead Loads

Live Loads

Initial Self Weight N/A N/A

Final Without Sway Self Weight A.C. OverlayConcrete Barrier

HS20 Truck + LanePermit Vehicles

37.514

---------- 2.68=


T2

Start of Tutorial

Start LEAP Bridge. By default, the program is installed in Programs/LEAP Software. To open, click Start > Programs> LEAP Software > LEAP BRIDGE.

Step 1

The Project screen displays. Click the Geometry tab to display the Geometry screen. At this time, the bridge is not defined and nothing is shown. Click the Superstructure tab to display the bridge superstructure. Once again, the superstructure is undefined. Click the CONBOX button to invoke CONBOX. Once in CONBOX, open the file called “T2_CBX.cbx” or enter the superstructure and pier definition. Refer to the CONBOX User Manual for data entry in CONBOX. Exit CONBOX and answer Yes to the prompt for saving that data file, and save it as Tutor2.xml. At this time, the Superstructure tab in LEAP Bridge will display the superstructure geometry as shown in Figure T2-4.

Figure T2-4 Superstructure Screen

Step 2

Click the Project tab, and enter the general information in the fields as shown in Figure T2-5.


T2


Step 3

Click the Substructure tab and note that the integral pier geometry is shown. Click the RC-PIER button to invoke the program. Once in RC-PIER, you can notice that all of the information related to the integral cap pier as defined in CONBOX has been brought over. You can choose to continue to add additional information and analyze the substructure in RC-PIER. In this example, we will focus on the data transfer aspect only. You can view the transferred information in the Geometry tab, in the Pier Config, SuperStr, Cap, Column and Brng/Girder dialogs. Click OK to close RC-PIER.

Step 4

Click the Geometry tab and view the 3-D view of the bridge. Click the GEOMATH button to invoke GEOMATH. Exit GEOMATH and note the abutments are added to the bridge by default as shown in Figure T2-6.


T2

Figure T2-6 Geometry Screen

Step 5

Click the Reports tab. Select any desired set of reports and view the results.


T2



Tutorial

T3
3-Span CIP R/C Slab Bridge
This LEAP Bridge tutorial takes you through a design, step-by-step, demonstrating the design of a continuous 3-span cast-in-place reinforced concrete haunched slab. In this tutorial you will be designing in accordance with the AASHTO LRFD Design Specifications.

The information for this tutorial is contained in an input file called “Tutor3.xml.” As an alternative to inputting all the information from scratch, as directed in this tutorial, you can load this file and only work on the sections you wish. To load this file, select the Open command from the File menu. Browse to the LEAPBRIDGE/Examples subdirectory, if it is not already showing, and select the file “Tutor3.xml.”

This tutorial is adapted from the Kansas Department of Transportation’s concrete haunched slab standards.


T3-1

T3

Figure T3-2 Cast-in-Place Concrete Haunch Slab

Figure T3-3 Cross Section (A-A)


T3

Problem Data

Concrete Material Properties

Design Specifications

AASHTO LRFD

Units

English

Rebar Information

fy = Grade 60

Superimposed Dead Loads

On Composite (DW) FWS = 0.9538 K/ft

On Composite (DC) 2 barriers = 0.55 K/ft

Load Combinations

CIP Slab Drop-Cap Pier

Unit Weight (Pcf) 150 150

E-Modulus, E28 (Ks) 4000 4000

Poisson’s Ratio 0.20 0.20

Thermal Coeff. (1/°F) 6 10-6 --

fci (a) - --

fc (a) 5 5

Humidity (%) 80 --

Ultimate Creep Coeff. Program Calculated --

Ultimate Shrinkage Strain Program Calculated --

DeadLoads

SuperimposedDead Loads

LiveLoads

Self Weight FWSConcrete Barrier

HL-93 – Multilane


T3

Start of TutorialStart LEAP Bridge. By default, the program is installed in Programs/LEAP Software. To open, click Start > Programs> LEAP Software > LEAP BRIDGE.

Step 1

The Project screen displays. Click the Geometry tab to display the Geometry screen. At this time, the bridge is not defined, and nothing is shown. Click the Superstructure tab to display the bridge superstructure. Once again, the superstructure is undefined. Click the CONBOX button to invoke CONBOX. Once in CONBOX, open the file called “T3_CBX.cbx,” or enter the superstructure and pier definition. Refer to the CONBOX User Manual for data entry in CONBOX. Exit CONBOX and answer Yes to the prompt for updating the LEAP Bridge model, and No to generate reports. Now save the LEAP Bridge file as “Tutor3.xml.” At this time, the Superstructure tab in LEAP Bridge will display the superstructure geometry as shown in Figure T3-4.

Figure T3-4 Superstructure Screen


T3

Step 2

Click the Project tab, and enter the general information in the fields as shown in Figure T3-5.


Step 3

Click the Substructure tab and note that the pier geometry is shown. In this case, the pier was defined as a drop cap and therefore can be imported in RC-PIER. While Bent1 is selected in the pier list, click the RC-PIER button to invoke the program.

Once in RC-PIER, open the file called “T3_RCP.rcp” or enter the substructure definition. Refer to the RC-PIER User Manual for data entry in RC-PIER. Exit the program and answer Yes to the prompt for updating the LEAP Bridge model. Select Bent2 from the drop-down list and press the RC-PIER button to invoke the program. Once again, open the file “T3_RCP.rcp” and close it to save it in the current bridge. See Figure T3-6.


T3

Figure T3-6 Substructure Tab Screen

Step 4

Click the Geometry tab and view the 3-D view of the bridge. Click the GEOMATH button to invoke GEOMATH. You can view detailed geometry information, and get quick reports for elevation, cross sections, etc. within GEOMATH. Next, exit GEOMATH and click OK to update the LB model.


T3

Figure T3-7 Geometry Tab Screen

Step 5

Click the Reports tab. Select any desired set of reports and view the results.


T3


Index - Volumes I and II

Numerics2-Span CIP PT Box Girder Bridge T2-13-Span CIP R/C Slab Bridge T3-13-Span Precast I-Girder T1-1

AABC Wizard CU-1, CU-5Adding Curves GO-21Adding Tangents GO-20Automatic Bridge Creator IN-3Automatic Bridge Creator (ABC) Wizard GO-15

BBridge Alignment Dialog Box GO-20bridge superstructure CU-1

CComponent Program Libraries A-1Component Reports RP-7Components Menu GO-13CONBOX IN-3, GO-8, GO-11, RP-7, A-1CONSPAN IN-3, GO-8, GO-11, RP-7, TH-2, A-1Creating Alignment Ties GO-21Cross Section Report RP-5

DData

CONBOX TH-1CONSPAN TH-1exchange TH-1GEOMATH TH-1RC-PIER TH-1Shared TH-2storage TH-1

data TH-1Data Entry CU-1Database file TH-2Defining Multiple Bridges Using the ABC Wizard GO-25Deleting Segments GO-21

EEdit Menu GO-12

FFile Menu GO-11File Menu Terms GO-12

GGeneral overview GO-2GEOMATH IN-3, GO-6, GO-11, RP-7, TH-2

Libraries A-1Geometric Design CU-3, CU-4Geometry Tab GO-6Geometry Tab Screen Terms GO-6Getting Started GS-1, CU-1Graphics windows GO-2

Pop-up menus GO-2

LEAP© Bridge v09.00.00 - Volumes 1 & II Index - i©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.

HHardware requirements GS-1Help Menu GO-27

IInput Files GO-5Interface IN-5

LLayout Report RP-3, RP-4LEAP Bridge Configurations GS-7LEAP Bridge Reports RP-2Libraries

Component Programs A-1Libraries Menu GO-13

MMain Features IN-3Material Properties Definition GO-19Material Report RP-6Menus

Components GO-13File GO-11Graphical Options GO-14Help GO-27Libraries GO-13View GO-12

Microsoft .NET GS-1Multiple file copies GS-8

NNavigating the program GO-2

OOnline Help IN-5, GO-27

open girder bridge superstructure and substructure CU-2Opening Database Files GO-5Options Menu GO-14

PPile Pattern GO-17Pop-up menus

In graphics windows GO-2Print Tab RP-1Program Boundaries and Conventions IN-4Project information GO-5Project Information Report RP-2Project Tab GO-5

RRC-PIER IN-3, GO-9, GO-11, RP-7, A-1Reports IN-3, GO-10, RP-1

Component RP-7CONBOX RP-7CONSPAN RP-7create GO-10Cross Section - Cast-in-Place Bridge RP-5Cross Section - Precast Bridge RP-5GEOMATH RP-7Geometry GO-11Layout Report - Cast-in-Place Bridge RP-4Layout Report - Precast Bridge RP-3LEAP Bridge GO-11, RP-2Material RP-6Print RP-1Project Information RP-2RC-PIER RP-7Save RP-1Setup RP-1Substructure GO-11Superstructure, CIP GO-11Superstructure, Precast GO-11View RP-1

Reports Tab GO-10Reports Tab Screen Terms GO-10

Index - ii LEAP© Bridge v09.00.00 - Volumes I & II©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.

SScreen Terms

Geometry Tab GO-6Reports Tab GO-10Status Bar Option GO-27Substructure Tab GO-9Superstructure Tab GO-8

Security GO-12shared data CU-6, CU-9, CU-13Status Bar Options GO-27Status Bar Options Terms GO-27Substructure Data Definition GO-17Substructure Tab GO-9Substructure Tab Screen Terms GO-9Superstructure Data Definition GO-16Superstructure Tab GO-7Superstructure Tab Screen Terms GO-8System requirements GS-1

TTechnical Support GS-8Tutorials

Tutorial 1 - 3-Span Precast I-Girder T1-1Tutorial 2 - 2-Span CIP PT Box Girder Bridge T2-1Tutorial 3 - 3-Span CIP R/C Slab Bridge T3-1

Typographical conventions IN-2

UUnits IN-5

VView Menu GO-12Views GO-14

2-D GO-8, GO-93-D IN-3, IN-4, GO-7Project Tree IN-3transparent IN-4

WWizard / A B C GO-15Wizard / ABC

Advanced Functionality GO-20

XXML GO-5, TH-1

LEAP© Bridge v09.00.00 - Volumes I & II Index - iii©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.

Index - iv LEAP© Bridge v09.00.00 - Volumes I & II©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.

LEAPBridge Tutorials

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