Autodesk Robot Structural Analysis

[#1]

Comparing simple hand calculations with the Robot results regarding beams supporting slabs, I've noticed two things:

  - Robot overlaps the beams and slabs and seems to consider the weight of both independently, meaning that the reactions will be higher than reality;

  - The connection between the beams and columns doesn't represent the real rigidity of the composite beam+slab, as the slab makes the beam behave as a T-beam.

Questions:

  - is there a way to subtract the overlapped weight?

  - is is possible to "lower" the beam seen in the image so that the top os flush with the slab and make them act with the equivalent moment of inertia? Or is it better choose an equivalent T-section for the beam? (in this case the overlapping problem gets even worse)

Thanks

Joao

[#2]

Please check:

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/T-slab/m-p/3185418

and

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Beam-offsets/m-p/3332921

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