How can I control the stiffness reduction by load cases for surfaces?

Answer

In the Edit dialog box of the respective surface, in the "Modify Stiffness" tab, you can select which type of stiffness modification is to be performed. For example, you can use "Multiplier Factors" as shown in Figure 01.

Multiplier factors can be specified for various stiffness components (for example, membrane stiffness).

Whether these factors or the defined stiffness modification will be applied in the individual load cases or load combinations is controlled via 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 selected. 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 Multiplier factor

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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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