How can the stiffness reduction be controlled for surfaces by load cases?

Answer

First, select the type of stiffness modification to be carried out in the Edit dialog box of the respective surface in the "Modify Stiffness" tab. For example, as shown in Figure 01, by using the "Multiplication Factors".


Multiplication factors can be specified for the different stiffness components (for example, membrane stiffness).

Whether the factors or the set stiffness modification or load combinations will be applied in the individual load cases is controlled by the calculation parameters. Now, this means that the modification is taken into account as soon as the check box shown in Figure 02 has been set. When removing the check box, the modification will not be considered for the surfaces.

Thus, it is possible to control the stiffness modification by load case or by load combination.

Keywords

Modify stiffness Stiffness factor Calculation parameters Surface stiffness Multiplication factor

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RFEM Main Program
RFEM 5.xx

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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

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