Torsional buckling and flexural-torsional buckling

[rythin]

Hi.

It is possible to calculate a close to exact critical force for flexural buckling using the buckling analysis. Is it similarly possible to calculate critical forces for buckling modes listed in the subject? All I've seen so far are calculations using procedures described in different codes that are simplified at best.

Thanks in advance.

[Artur.Kosakowski · Accepted solution]

For bar model it is not possible. You need to model a steel profile as panels in a shell model type instead.

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[rythin]

Thanks for the quick response, Artur!

I have managed to create a steel I-beam profile consisting of three separate panels joined together at the medium nodes. It is a simply supported beam loaded with a linear load acting on a top flange along the axis of a web.

Am I correct in assuming a critical load factor (output of a buckling analysis) now represents a loss of the stability in the compressed flange, and is therefore lateral-torsional buckling?

r.

[Artur.Kosakowski]

You need to determine the kind of buckling by the shape of the buckling mode.

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

[rythin]

Thanks for your help! I appreciate it.