LARS - Method to Model Post Tensioned Draped Strands
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Method to Model Post Tensioned Bridges and Defining Draped Strands in LARS Bridge
Many bridges utilize a combination of prestressed strands and draped post tensioned tendons. When the load rating models are created, the post tensioned tendons should…
LARS - Method to Model Riveted Plate Girders
Model a riveted plate girder in LARS Bridge
Riveted plated girders are generally made up of angles, a web plate and coverplates. Model a riveted plate girder in LARS Bridge by using the technique listed below:
1) Input the horizontal legs of the top…
LARS Bridge Use ADTT for gamma__LL legal
Use ADTT for γ LL for legal loads
Setting the “ γ LL Strength I & II ” = 0.000 provides Inventory and Operating γ LL values = 1.75 (Inventory) and 1.35 (Operating) for all vehicles regardless of ADTT. It appears that LARS will only modify the γ LL factors…
LARS HL93_negative loading
HL93 in LARS
LARS HL-93 vehicle information in the program is not detailed and does not differentiate between TRUCK+LANE, TANDEM+LANE, or 90% TRUCK PAIR + LANE (continuous structures only) in the output. Further, comparison of ratings performed for…
New Update LARS Bridge v5.00.06.09 available on SELECT Server
General
Fix for LRFR live load various distribution factor values were defined in various spans of continuous structures.
2. Fix for ASD/LFD/LRFR live load symmetry. A larger live load value was sometimes computed. Changes have been made to…
New Update LARS Bridge v5.00.06.08 available on SELECT Server
LARS Bridge General Enhancements and Fixes
Critical bug fix for floor beam live loading. The issue occurred only when the default edge distance was 18” and the Description è General Bridge Information è Edge Dist. was set to 24”
Compute impact…
LARS product line update
Bentley’s Bridgekey product line is now the LARS product line. Also, all of the LARS products are now utilizing the “SELECT series 2” licensing. The individual products names have also been changed. The name changes are:
BridgeKey BridgeModeler…
Re: LARS Composite Beam Rating - LFD
LARS steel sections properties are usually the same as many programs.
If the Description/Analysis Codes/LFD Moment Redistribution option is checked, LARS will perform the moment redistribution as specified in AASHTO Standard Specification 10.48.1.3…
Dead Loads in LARS Bridge for Load Rating
I am load rating a CPS bridge (AASHTO I-beams with a reinforced concrete deck). Does LARS Bridge automatically calculate the dead load of the concrete deck or do I need to add it as a continuous load in the Dead Load Description input menu?
LARS HL-93 Loading
I am having difficulty with the HL-93 load in LARS v. 5.00.01.00. When I attempt to use the HL93 load the program instead rates the bridge using a OV20 load.
LARS Output - Member Loads At Panel Points
I am currently load rating a steel truss bridge. I am using the LARS software to load rate the truss, floor beams, and stringers. I am also load rating the gusset plates by other means. I would like to use the member forces at the panel points from the…
Bridge Modeler, concurrent forces report
I am using Bridge Modeler/LARS (Release 4.00.03.00) to load rate a truss. In a previous model, the output included a table of concurrent forces but now I am not getting that table. Has anyone else experienced this problem?
Larry
Use The LFD Option In Complex Truss
Document Information
Document Type: TechNote
Product(s): LARS Complex Truss
Version(s): All
Original Author: Bentley Technical Support Group
Use the LFD option in Complex Truss
For LFD select the "Report Output" option before selecting…
SELECTsupport TechNotes And FAQs
Key:
CS – Client Server Article
FAQ – Frequently Asked Questions
TB – Technical Bulletin
TN – TechNote
VID – SELECTsupport Video
Bridge Design And Engineering
Licensing
General LEAP Licensing FAQ
Bentley…