Determination of Internal Forces for Plates: Torsional Stiffness
Tips & Tricks
In a plate with full torsional stiffness, a significant part of loads is transferred by torsional moments. If it is not possible to set the positive effect of this additional stiffness in the calculation (for example, due to a butt joint of a precast plate in the stiffness area), you have to reduce the torsional stiffness.
For this, use the ‘Orthotropic’ stiffness of a surface in RFEM. In the K33 text box, you can specify the factor D33 for torsional stiffness about the axes x' and y' in the stiffness matrix.
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Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements