Angles force cause torsional buckling?

[Fynch]

If I have a force going into a hinge and hinge into a cantilever column at an angle - will it cause torsional buckling? Other than shear and bending I'm wondering if I should also account for torsion also.

I've sketched out the structure in the attached. There are 2 hinges and they're connected to a box steel post filled with concrete.

 

[kwinner]

Yes, consider torsion. Refer to AISC 360 Specifications Section H3.1 and H3.2.

 

[phamENG]

Will it cause torsional buckling - maybe. You'd have to analyze it and find out. But yes, you should absolutely consider torsion even if you don't get torsional buckling. After all, torsional buckling is an instability mode caused by axial load. I have a good paper on it around here somewhere. If anything I'd say you're more prone to flexural-torsional buckling, which is a combined failure of twisting about the shear center as it buckles under axial load AND flexural failure. And you also have pure torsion and warping to contend with.

 

[Fynch]

Thank you. Just to confirm the only axial loading is the self weight. The diag force is lateral

 

[WARose]

Agree with phamENG. And torsional buckling tends to be something important with sections like channels, tees, angles and so on. This appears to be a tube.