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When I define an elastic foundation, is there any possibility to make the springs for tension or compression fail?


In the current versions of RFEM and RSTAB, it is possible to design elastic foundations to fail either under tension or compression.

In RFEM, this function can be applied to both line supports and surface supports. The definition is made via "Insert" → "Model Data" → "Line Support"/"Surface Support" or "Edit" → "Model Data" → "Line Support"/"Surface Support". Under the "Nonlinearity" option, you can set the type of failure, see Figure 1.

Figure 01 - Failure of elastic foundation in RFEM

In RSTAB, this option is only available for member elastic foundations. The definition of the failure criteria is analogous, see Figure 2.

Figure 02 - Elastic foundation fails in RSTAB


Foundation Member elastic foundation Line support Surface support Elastic surface foundation failure Failure at tension Failure at pressure



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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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RSTAB 8.xx

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The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

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