FAQ 000459 EN

Helpful Questions & Answers

  • Frequently Asked Questions (FAQs)

Are warping stresses in structural components subjected to torsion considered in RFEM/RSTAB and the STEEL or RF‑STEEL Members add-on modules?

Answer

No, they are not. In RFEM/RSTAB or the RF‑/STEEL add‑on module, the warping torsion does not play a role. For members, the warping resistance has no effect here.

RF‑/STEEL calculates torsional stresses close to reality by using MT/WT or MT/(IT/z). With this approach, the warping torsion (primary and secondary torsion or warping bimoment) is not considered.

The warpage is considered in the add‑on modules RF‑/FE‑LTB, RF‑/STEEL Warping Torsion and the cross-section properties program SHAPE‑THIN.

RF-/STEEL Warping Torsion is an extension of the RF‑/STEEL EC3 add‑on module. It performs lateral‑torsional (flexural-torsional) buckling analysis of members according to the second‑order theory with 7 degrees of freedom and application of imperfections with regard to mode shapes. The designs are based on the standard EN 1993‑1‑1:2005 + AC:2009.

Find more information in the webinar 'New Modules RF-/STEEL Warping Torsion and RF-/STEEL Plasticity', that you can download under Links below.

Keywords

warping torsion torsion torsion stresses primary torsion secondary torsion warping bimoment warpage warping resistance torsional warping

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  • Updated 5 April 2021

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