Document Information

Document Type: FAQ

Product(s): LEAP CONSPAN

Version(s): All

Original Author: Bentley Technical Support Group -VM

QUESTION: When the user runs a beam design and then changes nothing but the final concrete strength, he/she gets different results for tensile stress at the bottom flange for the Service III load case. Please provide additional explanation on this issue ?

ANSWER:

This is the answer…..

1.) Using the value of concrete strength that you specify, the Youngs modulus is computed using the formula

2.) Using the Youngs modulus the loss in strength is calculated using the formula

3.) This loss in strength is substracted from total strength to give residual strength , which is then divided by the total area to give the tensile stress.

Tensile stress at the bottom flange for the Service III load case.

Document Information

QUESTION: When the user runs a beam design and then changes nothing but the final concrete strength, he/she gets different results for tensile stress at the bottom flange for the Service III load case. Please provide additional explanation on this issue ?