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
Dear Babmau,
Now what I get from your deliberations that you wish to have the same result for the beam modelled with steel section and plate as that for the composite beam out of sections stored in the software. It is not possible because Staad not only uses the material properties but the sectional properties inbuilt in the section table for the analysis so as to behave monolithically.
If any one carries a different opinion, it would be welcomed