LEAP Bridge Steel enhancements and corrections release 2 of 2021 (March 2022) (v21.2.0.31)

LEAP Bridge Steel (LBS)

Enhancements for PennDOT

The following features have been added:

New permit/legal vehicles (P-82, P2016-13, ML-80, and TK527)
Rules to apply live load for analysis

Allow design live load to run together with pedestrian load
New dynamic load allowance for permit vehicles
Live load distribution factor update per PennDOT DM-4
Default auto-generated load groups per PennDOT DM-4
Self-weight of field splice considered in design check

Steel design code checker updated

Lateral torsional buckling resistance
Hybrid factor in stress resistance
Lateral stress in the flanges
Lateral bracing design check

Improvement of the loads transfer from superstructure to substructure

This enhancement offers users flexibility to either update the loads transfer in order to regenerate the load cases in the substructure or keep the existing load cases generated previously.

The following issues are fixed:

Live load distribution factors incorrectly calculated at supports of interior girders in LEAP Bridge Steel.
Incorrect zigzag showed up for lanes in a user's LEAP Bridge Steel file. Unable to run the related analysis in LEAP Bridge Steel.
Incorrect numbers of the Regions shown in the reports in LEAP Bridge Steel.

The Ground surface information was incorrectly shown after .tin file was imported in LEAP Bridge Steel.
The three point bearing system was incorrectly shown when a bridge model was being transferred from OpenBridge Modeler to LEAP Bridge Steel.
Code check option of the LRFD Appendix A6 option incorrectly greyed out for a straight steel bridge with no skew in LEAP Bridge Steel.
Load cases failed to update automatically in Substructure module when the geometry parameters of superstructure was changed in LEAP Bridge Steel.
Incorrect zero rating results reported under Service II for a user’s LEAP Bridge Steel file.

Incorrect forces were read for lateral bracing cross-frame members of the steel tub girder in LEAP Bridge Steel.