Load distribution on two way concrete slab on two concrete beams

[bernans.eriks]

Hello. I have two way concrete slab on two concrete beams.

I use a shell for concrete slab. See robot model file in attachment.

We can see that linear load (DL2) is 5kN/m2 and distributed linear load on beams (transfered from slab) is 7,5 kN/m (5kN/m2*1,5m(slab half width)=7,5 kN/m2).

Hello

My question is why the moment for shell (with messhing) dont shows correctly its need to be 33,75 kN*m

In second model the panel considered as "load take down" and the moment there shows correctly

It looks like meshing points some how supports the beam and descreases the moment.

Can you please take a look on the model in attachment and give me responds

Regards

Eriks

[Rafacascudo · Accepted solution]

If you use simplified method for load distribution , then you will not get correct results for the slab forces.

It has to be analytical

[bernans.eriks]

Thanks Rafaels. 

I changed shell method to analitcal method and added linear releases on ends of panel

And all works correctly!