Autodesk Robot Structural Analysis

[#1]

I am performaing analysis and design of a composite slab. I am approaching this with user defined beams having same properties except a higher Iy and a flexible diaphragm slab.

1- Is my approach correct or is there a better and more reliable method.

2- Shouldn't there be other parameters than Iy that need to be increased or changed. See attached image.

Thanks

[#2]

http://docs.autodesk.com/RSA/2013/ENU/filesROBOT/GUID-BBDCC532-E4F1-4386-9DFA-FE2EC05B44C2.htm

If you want to check stresses - set proper V... values