Non-linearity and “Why do I get tension/compression where there should be no tension/compression?”

In FEM-Design non-linear behaviour is possible to consider for supports (e.g. uplift), connections and truss members (e.g. tension-only). The analyses where this is included are Load combinations, Imperfections and Stability

Figure 1. Analysis types that include non-linear effects.

To activate non-linear effects, tick the “NLE” checkbox at Calculations > Analysis > Load combinations > Setup by load combinations.

 

Figure 2. How to activate non-linear effects.

 

Since these boundary condition non-linearities are not in effect for the results of Load cases, non-linear results must be viewed in Load combinations.

 

Figure 3. Non-linear support not in effect in Load cases

J
Joakim is the author of this solution article.

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