Supports and Loads for Calculation with Warping Torsion
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Lateral-Torsional Buckling Analysis with New Torsional Warping (7 DOF) Add-on for RFEM 6 / RSTAB 9
This technical article presents some basics for using the Torsional Warping add-on (7 DOF). It is fully integrated into the main program and allows you to consider the cross-section warping when calculating member elements. In combination with the Stability Analysis and Steel Design add-ons, it is possible to perform the lateral-torsional buckling design with internal forces according to the second-order analysis, taking imperfections into account.

New
- The design of the connection components is performed according to Eurocode EN 1993-1-8
- After activating the Add-on, the design situations for Steel Connections must be activated in the "Load cases and Combinations" dialog box
- For the design of the connection stability (Buckling), it is necessary to have the Add-on Structure Stability activated
- The calculation can be started via the table or via the icon in the top bar
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How do I set a release for warping?
- How can I define a warping spring or a warping restraint?
- How can I deactivate the 7th degree of freedom for certain members or cross-sections only?
- How can I display the cross-section warping?
- The limit stress is activated, but my stress ratio is “non-designable” in the Stress-Strain Analysis add-on. What could be the reason?
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How do I define effective lengths when designing steel members in RFEM 6?
- How do I define a member as a cantilever and not as supported at both ends for serviceability or deflection design?
- I would like to model a frame beam with a tapered cross-section. For this, I have created a member with the cross-section distribution "Tapered at member start". However, the resulting cross-section is displayed incorrectly in the rendering. What is the problem here?
- How do I define a member as a cantilever and not as supported at both ends for serviceability or deflection design?
- How can I define a warping spring or a warping restraint?