FAQ 001188 FR


For a support that can transfer only compression forces, the program also shows tension forces.

How is this possible?


In a result combination of your model, the load cases are connected as acting alternatively ("or"), that is, acting one time positively and one time negatively. Negative factors in an RC can be dangerous in case of nonlinear analysis. The failure of springs, tension members, etc can act in the wrong direction and you obtain nonsense results.

The reason for this can be found in the calculation of the RC results. They are combined from the available results. If a support in a load case has compressive forces, then the minus sign in the combination criterion reverses the magnitude and acts as tension force.

To avoid this issue, you can specify the load cases that are included as negative in the combination criterion as new load cases with negative loading. Alternatively, we recommend to use load combinations.



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RFEM Logiciel principal
RFEM 5.xx

Programme de base

Logiciel de calcul de structures aux éléments finis (MEF) pour les structures 2D et 3D composées de plaques, voiles, coques, barres (poutres), solides et éléments d'assemblage

Prix de la première licence
3 540,00 USD
RSTAB Logiciel principal
RSTAB 8.xx

Programme de base

Logiciel de calcul de structures filaires composées de charpentes, poutres et treillis. Il permet le calcul linéaire et non linéaire des efforts internes, des déformations et des réactions d'appui

Prix de la première licence
2 550,00 USD