- Stability analyses for flexural buckling, torsional buckling, and flexural-torsional buckling under compression
- Lateral-torsional buckling analysis of the structural components subjected to moment loading
- Import of the effective lengths from the calculation using the Structure Stability add-on
- Graphical input and check of the defined nodal supports and effective lengths for stability analysis
- Depending on the standard, a choice between user-defined input of Mcr, analytical method from the standard, or use of internal eigenvalue solver
- Consideration of a shear panel and a rotational restraint when using the eigenvalue solver
- Graphical display of a mode shape if the eigenvalue solver was used
- Stability analysis of structural components with the combined compression and bending stress, depending on the design standard
- Comprehensible calculation of all necessary coefficients, such as interaction factors
- Alternative consideration of all effects for the stability analysis when determining internal forces in RFEM/RSTAB (second-order analysis, imperfections, stiffness reduction, possibly in combination with the Torsional Warping (7 DOF) add-on)
Aluminum Design | Strength and Stability | Stability Analysis
![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.
![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.
![Aluminum Design in RFEM 6](/en/webimage/043467/3584316/Screenshot_09-01-2023_11.55.05.png?mw=512&hash=5412e7cb74880198d3d2890e5d084e2a99dcd59e)
- Calculation of deflections and comparison with the normative or manually adjusted limit values
- Consideration of a precamber for the deflection analysis
- Different limit values are possible, depending on the design situation type
- Manual Adjustment of Reference Lengths and Segmentation by Direction
- Calculation of deflections related to the initial structure or to the deformed structure
- Further detailed design checks depending on the selected design standard (for example, vibration design according to EN 1999‑1‑1, 7.2.3)
- Graphical result display integrated in RFEM/RSTAB; for example, the design ratio of a limit value, or the deformation or the sag
- Complete integration of the results into the RFEM/RSTAB printout report