When using staad is there a way to determine the center of rigidity and center of mass locations for each floor? I know the program does this if you specify a rigid diaphragm but what if you model a semi-rigid diaphragm using plate elements? I need the centers of mass and rigidity to calculate the accidental torsion and add that to the model as a separate load case as staad doesn’t do this for you when modeling the diaphragm as plate elements.
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