FAQ 000272 IT

Calcolo RFEM RSTAB

Do I have to activate the favorable effect due to tension for performing a second-order analysis of a system with tension members?

Risposta

In general, the check box "Consider favorable effects due to tension of members" is appropriate for every system.

In the standards, you find provisions to consider favorable effects with a smaller partial safety factor as action. The use of varying partial safety factors needs too much computing time. Therefore, RFEM and RSTAB offer you the possibility to set the tension forces to zero. The method is on the safe side. To do this, clear the check box.

On the other hand, the standards also refer to actions. Therefore, it would be possible to decide for each action, whether it has a favorable or unfavorable effect. An action that is seen as having a globally unfavorable effect can have a local favorable effect. If the axial forces are to be included in the calculation as unchanged, select the check box.

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RFEM Programma principale
RFEM 5.xx

Programma principale

Software di progettazione strutturale per l'analisi con elementi finiti (FEA) di sistemi strutturali piani e spaziali costituiti da piastre, pareti, gusci, aste (travi), elementi solidi e di contatto

RSTAB Programma principale
RSTAB 8.xx

Programma principale

Software di progettazione strutturale per il calcolo lineare e non lineare di forze interne, spostamenti generalizzati e reazioni vincolari di telai e strutture costituite da aste e travature reticolari