Composite beam

Hi,

I am trying to model a composite beam (steel beam + concrete slab).

For this purpose I modeled my composite beam as a steel beam and plate elements.

I applied then an offset distance 0.95 m to the steel beams. Now I see that the steel beam gets a very large axial force and the Mz moment at mid span is very small !!!

If I apply MEMEBER RELEASE (Fx) to the steel beams, the Mz moment would be correct, but what happents if I apply temperature load to the plate elements?

The axial force in the beams will be zero so this approach won't work properly.

I am really confused the way STAAD calculates section forces.

Do you have any clarification on this?

babmou

 

 

Composite Beam.std
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