Thanks for your follow up on this issue. Really appreciate it.
As you see when I use the in-built Composite Beam option in STAAD, the maximum mid span moment will be Mz=5000 kNm and no axial force is induced either as you have verified in your excel sheet, but the problem is this model doesn’t work when temperature load is applied.
My intention is to create a model comprising of beams and plate elements like “Composite Beam.std”.
The question is how I can create a model to get same Mz and no axial force for pure bending due to gravity loads?
I tried different ways such Master-Slave and skipping the OFFSET command, however I still get axial force.
I don’t have any other software to verify if I get the same section forces.
I know many users have the same difficulty in understanding the way OFFSET works.
Have you any suggestions?
I will be away for two days, but please keep on this discussion as it is very important for many other users too.