BrIM Analysis Product Update - Mid-America...
Transcript of BrIM Analysis Product Update - Mid-America...
1 | WWW.BENTLEY.COM | © 2017 Bentley Systems, Incorporated © 2017 Bentley Systems, Incorporated© 2017 Bentley Systems, Incorporated
BrIM Analysis Product Update
Steve Willoughby, Bentley Systems
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LEAP Bridge Concrete
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LEAP Bridge Concrete
• 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
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AASHTO 7th Edition with 2015 and 2016 InterimsMBE 2nd Edition with 2015 Interims
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What is LEAP Bridge Concrete?
LEAP Bridge Concrete
Precast/PrestressedGirder
CIP RC/PT Girder/Slab
SubstructureBridge Parametric
Layout
Spliced Girder
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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
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Consolidated library
• Single-file library
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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
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Detailed design reports
• DevExpressreporting format
• LRFD code
• Display the references of articles, equations, and intermediate results
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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
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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.
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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
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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
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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)
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New wind load generation (1)
LBC: LRFD-7 with 2015 Interims
LBC: LRFD-7 with 2016 Interims
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New wind load generation (2)
LBC: LRFD-7 with 2015 Interims
LBC: LRFD-7 with 2016 Interims
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New wind load generation (3)
LBC: LRFD-7 with 2015 Interims
LBC: LRFD-7 with 2016 Interims
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New wind load generation (5)
LBC: LRFD-7 with 2015 Interims
LBC: LRFD-7 with 2016 Interims
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New wind load generation (6)
LBC: LRFD-7 with 2015 Interims LBC: LRFD-7 with 2016 Interims
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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
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Response spectrum analysis
• Grillage model of full bridge
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LEAP Bridge Steel
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Modeling, design, analysis, and load-rating system for steel bridges
LEAP Bridge Steel
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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
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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
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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
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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
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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
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LBS Auto Design (Flanges)
• Maximum size flange data is copied into girder definition
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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
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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
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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
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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
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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
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3D Finite Element Analysis: Analysis Tab
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3D Finite Element Analysis: Analysis Results
• Analytical Model • Analysis Results
Deflection Diagram
Moment Diagram