Hi. When LEAP determines the moment interaction diagram of a column that was analyzed using P-Delta affects does LEAP adjust the moment interaction diagram for the deflections? Such as for a loss of stiffness in the columns due to the deflections as stated in AASHTO LRFD C4.5.3.2?
Or is the moment interaction diagram the same for a column regardless of the deflection?
I'm using OBD V10.10.00.26
Thanks
As per the RCpier user Manual ,
The program is internally adjusting the moment interaction diagram for the deflections.
Multiple iterations are performed with the modified frame.
Also as per the user manual the program is not accounting for Loss of stiffness in column due to the deflections.
The user has to input the reduced MOI manually in Column Dialog Box.
For more information related to reduced MOI issue please check the wiki articles in the below mentioned Bentley Communities link.
https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/52119/reduction-in-moment-of-inertia
Answer Verified By: Rob Whiteside