Document Information

Document Type: FAQ

Product(s): LEAP CONSPAN/Precast/Prestressed Girder

Version(s): All

Original Author: Bentley Technical Support Group - VM

QUESTION: How can the user determine a live load case where 100% of the negative moment between dead load contra flexure points (effect of two tandem trucks) is applied. The program applies 90% per AASHTO - is there a way to modify this parameter and get 100%?

ANSWER:

The application of 90% of the negative moment as per AASHTO code is hard coded and can’t be changed but one work around solution to this problem is to do 2 runs one by creating custom vehicle by increasing the present axle loads by 10% (that will be 110%) and then the program will apply 90% of it and then the user should be getting 100% of negative moment between dead load contra flexure points .And also the user needs to run one more file with default axle loads just to compare the results.

Negative Moment between Dead Load Contra Flexure Points

Document Information

QUESTION: How can the user determine a live load case where 100% of the negative moment between dead load contra flexure points (effect of two tandem trucks) is applied. The program applies 90% per AASHTO - is there a way to modify this parameter and get 100%?