BrIM Analysis Product Update - Mid-America CADDfiles.midamericacadd.org/2017/...BrIM_Analysis_Product_Update.pdf · BrIM Analysis Product Update Steve Willoughby, ... • Footing

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BrIM Analysis Product Update

Steve Willoughby, Bentley Systems

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LEAP Bridge Concrete

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• Change name from LEAP Bridge

Enterprise

• Design-centric for analyze, design, and

load rating

• Reinforced concrete, prestressed

concrete, post-tensioned concrete

• AASHTO Standard, LRFD, CHBDC, and

IRC specifications


AASHTO 7th Edition with 2015 and 2016 InterimsMBE 2nd Edition with 2015 Interims


What is LEAP Bridge Concrete?


Precast/PrestressedGirder

CIP RC/PT Girder/Slab

SubstructureBridge Parametric

Layout

Spliced Girder


What’s New in LBC v16.01 (August 2016)

• Consolidated library

• Unified integration of LBC with ProjectWise

• Detailed design reports for Substructure Module

• Two-way connection to OpenBridge Modeler

• Improved GUI


Consolidated library

• Single-file library


Enhanced integration of LBC with ProjectWise

• Added sharing capability for LBC libraries in PW

• Revised the existing workflow of sharing user data files thru PW

• Same workflow to share both user data and library files thru PW


Detailed design reports

• DevExpressreporting format

• LRFD code

• Display the references of articles, equations, and intermediate results


Detailed design reports (cont.)

• Cap– Flexural design check of pier/abutment cap

– Shear design check of pier/abutment cap

– Cracking control check of pier/abutment cap

– Fatigue check of pier/abutment cap

• Column– Shear check of column (if shear check for column is selected)

• Footing– Isolated and combined footing

– Pile and spread footing

– Flexural design of footing cap

– One-way shear design check of footing cap

– Two-way shear design check of footing cap

– Cracking control check of footing cap

– Fatigue check of footing cap


Two-way connection to OpenBridge Modeler

• Concrete bridge models created in the OBM can be brought into LBC for analysis and design.

• Changes made to prestressed girder sizes and IDs, beam layout, and substructure components in LBC can be brought back to OBM.


What’s New in LBC v16.02 (December 2016)

• Upgrade to AASHTO LRFD 7th Edition with 2016 Interims

• Support two recent versions of the LRFD code

• Support lightweight concrete design in all LBC modules

• Support effective footing dimensions in spread footing per LRFD Section 10

• Quantities of wing wall and new VDOT beam types


Support two recent versions of LRFD

• LRFD 7th

Edition with 2016 Interims

• LRFD 7th

Edition with 2015 Interims

Substructure

Precast/Prestressed Girder

CIP RC/PT Girder


Upgrade to LRFD 7th Edition with 2016 Interims

• New wind load generation

• Lightweight aggregate concrete

• Updates on

– Load factor of Service III (Art. 3.4.1)

– Update on the parameters in control of cracking (Art. 5.7.3.4)

– Update on the allowable compression stressed before losses (Art. 5.9.4.1.1)


New wind load generation (1)

LBC: LRFD-7 with 2015 Interims


















LBC: LRFD-7 with 2015 Interims LBC: LRFD-7 with 2016 Interims


LEAP Bridge Concrete CONNECT Ed V17

• Released 06/08/2017

• Major Enhancement

– Response Spectrum Analysis

• Minor Enhancements

– Updated terms throughout the product

– PennDOT girder types

– Support multiple versions installation


Response spectrum analysis

• Grillage model of full bridge

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LEAP Bridge Steel


Modeling, design, analysis, and load-rating system for steel bridges

LEAP Bridge Steel


LEAP Bridge Steel Overview

• Supported bridge configurations

– Simple and continuous spans

– Straight and curved bridges

– Standard rolled shapes, welded I girders and Tub Girders

– 7th Edition of the AASHTO LRFD Specification with 2016 Interims

– 2nd Edition of the AASHTO Manual for Bridge Evaluation


LBS Automatic Girder Plate Generation

• Preliminary design can be time-consuming

• This feature assists user for initial sizing of plates, based on proportions suggested/required in AASHTO

• Parameters include web thickness and depth, flange thickness and width, and material

• User can accept sizes generated by program, or revise as desired


LBS Generate Plates Preview Data


LBS Design Optimization

• Many articles of AASHTO code checking are interrelated making

optimization an iterative trial-and-error approach

• Flange parameters: Width and Thickness

• Web parameter: Thickness

• Flanges are sized based on minimum area that passes AASHTO

code checking.

• Webs are sized to minimize stiffeners

• Structure must be reanalyzed following design optimization


LBS Design Optimization

• All webs with D/tw 150 have

solution from the following:

– a) Unstiffened Web

– b) Transversely Stiffened Web

• All webs with 150 < D/tw 300

have the following solution:

– c) Longitudinally Stiffened Web


LBS Member Definition Screen


LBS Stiffener Location Screen


LBS Web Design Optimization

• Start from input web thickness as minimum thickness

• Increase thickness until either:

– 1) Unstiffened web works

– 2) Maximum web thickness is reached

• If stiffeners must be used:

– 1) If D/tw 150, use transversely stiffened web, compute spacing d0

– 2) If 150 < D/tw 300, use longitudinally stiffened web, compute spacing d0


LBS Web Design Optimization


LBS Auto Design (Flanges)

• Maximum size flange data is copied into girder definition


Analysis – Design Reports


Field Splices

• Design or check field splices on LBS models

• AASHTO LRFD 7th Edition, 2015 Interims

• Design includes all load combinations, including construction stages

• Design/check individual splices or all splices on the bridge at once


LEAP Bridge Steel CONNECT Edition V17

• Major Enhancements:

• 3D Finite Element Analysis

(FEA)

– More accurate analysis

results, especially for

complex structures

• Tub-Girder Analysis and

Design Check

– Product that addresses

all steel bridge types


LEAP Bridge Steel CONNECT Edition V17

• Minor Enhancements:

• Option to Specify Bracing of Concrete-Encased Top Flange – To perform an accurate design check for non-composite bridges with concrete-encased top flanges

• Detailed Camber Tables/Diagrams– To show more geometric properties of the girders that are typically presented in the design plans


Tub-Girder Model

• Single or multiple tub-girders

• Curved or straight alignment

• Stiffeners, internal and external cross-frames, top flange lateral bracing members, and more

• Single or double bearing options


Advantages of FEM

• Ability to handle structures with complex geometries (curved and skewed bridges)

• Ability to solve indeterminate structures

• Mesh size (or element size) could be adjusted for a target accuracy


Tub-Girder Model: Member Groups


Tub-Girder Model: Member Definition


Tub-Girder Model: Cross-Frame Locations


Tub-Girder Model: Bearings/Beam Seats



3D Finite Element Analysis: Analysis Tab


3D Finite Element Analysis: Analysis Results

• Analytical Model • Analysis Results

Deflection Diagram

Moment Diagram


Enhancements to Camber Tables/Diagrams

Documents

BrIM Analysis Product Update - Mid-America CADDfiles.midamericacadd.org/2017/...BrIM_Analysis_Product_Update.pdf · BrIM Analysis Product Update Steve Willoughby, ... • Footing