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Warping constant for RHS sections

Warping constant for RHS sections

Warping constant for RHS sections

(OP)
Hi,

Could you please let me know, how to calculate the "Warping constant" for RHS sections?

Regards,
Mugundan

RE: Warping constant for RHS sections

RHS sections don't warp meaningfully so it's generally a non issue.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: Warping constant for RHS sections

I always thought Cw = 0 for HSS

RE: Warping constant for RHS sections

(OP)
Guys,

Thanks for your reply.

I understand that the RHS do not warp and we can ignore the torsion due to warping. In such case, it would be enough to consider only the St.Venant torsion for RHS.

Also is it necessary to verify the combined bending and torsion too?

Thanks.

RE: Warping constant for RHS sections

Quote (Techfrendz)

Also is it necessary to verify the combined bending and torsion too?

Only the combined shear stress that results from torsion + flexural shear.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: Warping constant for RHS sections

(OP)
Thanks a lot :)

RE: Warping constant for RHS sections

If you are designing according to AISC 360-10 (or AISC 360-05) and the required torsional strength is more than 20 percent of the available torsional strength, then interaction between bending, torsion, shear, and axial force must be checked per Chapter H3.2 (see equation H3-6).

RE: Warping constant for RHS sections

I wasn't familiar with that provision. Thanks for tabling it Hokie.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: Warping constant for RHS sections

(OP)
Thanks very much guys.

RE: Warping constant for RHS sections

AISC Design Guide 9 gives good info on this.

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