The Torsional Warping (7 DOF) add-on allows you to perform the calculation of member structures in RFEM and RSTAB, taking into account the cross-section warping. You can consider all internal forces (N, Vu, Vv, Mt,pri, Mt,sec, Mu, Mv, Mω) determined in this way in the equivalent stress analysis of the aluminum design. Please Note: This feature is not yet available for the design standard ADM 2020.
Aluminum Design | Consideration of Internal Forces from Calculation with Torsional Warping (7 Degrees of Freedom)
![Model of Timber Platform](/en/webimage/039775/3498806/001819-01.png?mw=512&hash=e7f172e7dfaca53a2d2d7f5bdda41008f4f1c03d)
![KB 001874 | LTB Analysis According to ADM 2020 Section F.4 in RFEM 6](/en/webimage/048099/3772420/2024-03-18_15-43-26.png?mw=512&hash=418d15db74dbdf280bc2956def625d5b0eb8704f)
![Example of Aluminum Section in RFEM 6](/en/webimage/039766/3506176/EN_1_NEW.png?mw=512&hash=20139c15c22ed3af80d7bc27d2ec9cdac8a19340)
![Local Buckling Methods](/en/webimage/033068/3351551/ADM1.png?mw=512&hash=397e59fa6130c40cc8c8086909796292853c1750)
![Design of RSECTION Cross-Section Made of Aluminum](/en/webimage/032622/3674313/2024-01-02-08-08-03.png?mw=512&hash=8506d19b4f72c7f67893a86a07cd9c7937263a2b)
The Aluminum Design add-on provides you with further options. Here you can also design general cross-sections that are not predefined in the cross-section library. For example, create a cross-section in the RSECTION program and then import it into RFEM/RSTAB. Depending on the design standard used, you can select from various design formats. This includes, for example, the equivalent stress analysis.
With a license for RSECTION and Effective Sections, you can also perform the design checks while taking into account the effective cross-section properties according to EN 1993‑1‑5.
![Tension Design Considering Reduced Cross-Sectional Area](/en/webimage/032623/3483707/002458_EN.png?mw=512&hash=d1c48a5906ec45a706170a31cee7bc2ac3ca4b52)
You know for sure that when connecting tension-loaded components with bolted connections, you need to consider the cross-section reduction due to the bolt holes in the ultimate limit state design. The structural analysis programs also have a solution for this. In the Aluminum Design add-on, you can enter a member local section reduction for this. Enter the reduction of the cross-section as an absolute value or as a percentage of the total area at all relevant locations.
![Cross-Section Design Considering Warping Torsion (7 Degrees of Freedom)](/en/webimage/032626/3483793/002459_EN.png?mw=512&hash=44537d9d653cac0dff6898c4928cad660e102063)
The Torsional Warping (7 DOF) add-on allows you to perform the calculation of member structures in RFEM and RSTAB, taking into account the cross-section warping. You can consider all internal forces (N, Vu, Vv, Mt,pri, Mt,sec, Mu, Mv, Mω) determined in this way in the equivalent stress analysis of the aluminum design. Please Note: This feature is not yet available for the design standard ADM 2020.
![Graphical Display of Mode Shape for Lateral-Torsional Buckling Analysis](/en/webimage/032627/3483692/002462_EN.png?mw=512&hash=6aa3edd092b156b2ffe85fa7752b91477e584758)
Did you use the eigenvalue solver of the add-on to determine the critical load factor within the stability analysis? In this case, you can then display the governing mode shape of the object to be designed as a result.