Rigid floor diaphragm

amarnath · Post by **amarnath** » Sun Feb 03, 2008 2:43 am

Hi
I am doing nonlinear dynamic analysis of asymmetric plan shear buildings. I have the following queries:

1) In Opensees there is a RigidDiaphragm command can it be used to model rigid floor effect in a shear building shear buildings?

2) I was using Quad Element (plane stress) to model the floor slab in the building. Will this automatically take into account the rigid floor diaphragm effect?

3) In Quad Element does it take into account the membrane forces?

Waiting for your valuable suggestion.

Thanking You

Amarnath

derogar · Post by **derogar** » Sun Feb 03, 2008 8:45 am

r u trying to model shear wall with flat slab floor systems or trying to model punching in slab-column connections?

amarnath · Post by **amarnath** » Sun Feb 03, 2008 9:59 pm

Hi
No I am not modeling shear wall with flat slab. It is simple building having rigid floor. I wanted to know how to model it in Opensees?

Please let me know, whether quad element can be used to model rigid floor effect in the building.

With regards

Amarnath

silvia · Post by **silvia** » Mon Feb 04, 2008 6:56 am

why not the rigid diaphragm command?

amarnath · Post by **amarnath** » Mon Feb 04, 2008 8:35 am

Hi
I have several number of nodes so defining rigid floor diaphragm is little bit tedious.
More over I wanted to know whether modeling the floor slab with quad element will take into account the rigid floor diaphragm effect.

Amarnath