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Twisting moment in 2ways slab

Twisting moment in 2ways slab

Twisting moment in 2ways slab

(OP)
hi,
When do we have a flat slab with edge beams or drop panels, how can we take into account the torsion ? We cant use the wood amer analysis because it doesnt apply at the flat slab with beams or drops.
How can i integer the Mxy in the strips ??
Thanks a lot.  

RE: Twisting moment in 2ways slab

You could model the edge beam as a "beam" element and assign a torsional stiffness. For wide narrow beams (beams wider than they are narrow) their may be no need to design for torsion because it is compatibility torsion.

RE: Twisting moment in 2ways slab

Just a quick note Mxy is not torsion it is the rate of change of slope in the x-direction as one moves in the y-direction or vise versa. while it inculdes torison moments in slabs, it isn't entirely shear so compatibility donsn't apply, you may wish to read thread507-275796: cracked torsional slab stiffness  

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