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I get the message "Torsion present -> no stability analysis possible". Why does this appear and what can I do?

Answer

This warning appears because the torsion is not considered in the equivalent member design of Eurocode.

Figure 01 - Warning due to Torsion

You can either neglect the torsion at your own discretion and under your own responsibility by using the limit value in the "Details" dialog box, "Stability" tab.

Figure 02 - Limit shear stress due to torsion

Alternatively, you can perform the stability analysis for open cross-sections according to the second-order analysis (including consideration of warping) with RF-/STEEL Warping Torsion or RF-/FE-LTB (see links below).

Keywords

stability torsion second-order analysis warping torsion warning stability analysis non-designable ST320

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  • Updated 29 October 2020

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