Buckling analysis

Question:

I am doing a buckling analysis for a Main edge girder of a highly skewed highway bridge. When going through the mode shapes I find that the cross girders often buckle first. This is not realistic because there is jack arches in which i have not modelled.

Is there a simple way to prevent the cross members from bucking other that adding in additional supports or bracing members.

Thanks

Answer:
Hi,

There is no special function for this. How about increasing stiffness (Area, Iyy, Izz) of the cross girders using Section the Section Manager>Stiffness function?

Regards,
DK Lee
Creation date: 7/26/2018 10:00 AM (dklee@midasit.com)      Updated: 7/26/2018 7:30 PM (dklee@midasit.com)
Files
SHB_39 global model_L2_Buckling2_rigid Lframe.mcb
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