topic Re: RC slab design abnormalities in Robot Structural Analysis Forum

RC slab design abnormalities

Anonymous — Tue, 26 Sep 2017 14:52:10 GMT

Hi, Anyone has an idea why on a connection of two slab elements I have high required reinforcement on one side of the connection even moment diagram doesn't show any abnormalities in this area?

Thanks, R. Peter

Re: RC slab design abnormalities

Anonymous — Wed, 27 Sep 2017 05:48:50 GMT

Hi @Anonymous ,

Could you please attach your model?

Re: RC slab design abnormalities

Artur.Kosakowski — Mon, 02 Oct 2017 13:57:09 GMT

Hi @Anonymous

Is it the same when you disable correction of deflection by additional reinforcement (if activated) and the reduction of the moments over supports?

Re: RC slab design abnormalities

Anonymous — Tue, 03 Oct 2017 15:23:37 GMT

Artur, this was due to redistribution of loads from one panel 400 mm deep to other panel 250 mm deep (Globally averaged design forces). Without redistribution the maximum bending moment stays in the slab with bigger depth and therefore OK e.g. there is no excessive amount of reinforcement on one side of edge after redistribution has been switched off.

Re: RC slab design abnormalities

Artur.Kosakowski — Tue, 03 Oct 2017 15:33:44 GMT

Hi Peter,

I'm glad you found the cause and posted it.

I think that it is OK to mark your post as the solution, isn't it?