Explanation of Support Nonlinearities on Example | 1.2 Translation

Technical Article

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RFEM and RSTAB provide numerous variants of the nonlinear definitions of nodal supports. In the following, in continuation of an earlier article , the other possibilities of nonlinear support design for a displaceable support will be shown by a simple example. For better understanding, the result is always compared to a linearly defined support.


Each nodal support has its own local axis system. The axes are defined as X', Y' and Z'. This axis system is based on the global axis system of the RFEM / RSTAB file by default. However, it is possible to define a custom axis system or simply a rotation. In the example shown here, the support axis systems are displayed for all nodal supports. The possibilities of the individual nonlinearities are shown for the displacement in X '. For the other two support axis directions, the similar definitions apply.

Note: The nonlinearity always refers to the acting support force.

Diagram: Tearing

Supports nonlinearity Tearing Flowing Stop Friction



RFEM Main Program
RFEM 5.xx

Main Program

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

Price of First License
3,540.00 USD
RSTAB Main Program
RSTAB 8.xx

Main Program

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

Price of First License
2,550.00 USD