Frame buckling analysis

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Frame buckling analysis

Post by Ashok » Thu Oct 22, 2020 12:20 am

I am trying to do stability analysis of steel structures... Can I do a critical load analysis of a frame with vertical load? It's a single bay, single storey steel frame.
I am trying with eigen - but it is for natural frequency analysis I think - it is asking for mass.
Is it possible to get the buckling load and take the deformed shape - reduce it by a factor and do non-linear post buckling analysis ?
Kindly tell me the procedure...

Thank you,

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Re: Frame buckling analysis

Post by mhscott » Thu Oct 22, 2020 6:32 pm

You can use corotational mesh with frames to get buckling loads:

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Re: Frame buckling analysis

Post by selimgunay » Mon Oct 26, 2020 10:42 am

You should also apply a small lateral displacement to initiate buckling along with the corotational formulation

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