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Aussie Engineers - Plate Element Slenderness Limits not defined in AS4100

Aussie Engineers - Plate Element Slenderness Limits not defined in AS4100

Aussie Engineers - Plate Element Slenderness Limits not defined in AS4100

(OP)
Hey guys

I'm trying to do a refined design of steel equal angles in bending and have hit a hurdle. When assessing the slenderness of section elements there are some cases where you can end up with one of the plate elements in the angle having compression at the supported edge and tension at the unsupported edge (such as an angle bent around a local axis with the horizontal leg up). There are no elastic or plastic slenderness limits defined in Table 5.2 of AS4100 for this case.

Looking at the AISC DCTs they have definitely used some limits, as the effective section modulus given there lies somewhere between the plastic section modulus and 1.5 times the plastic section modulus. None of the cases in Table 5.2 yields the same result.

Any ideas on a source that might give those limits? I'm assuming they are empirical and can't be derived...

Thanks!

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