FAQ 003294 EN
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In RFEM and RSTAB, it is possible to analyze members with a variable cross-section, which can also consist of freely defined SHAPE‑THIN cross-sections. For the determination of internal forces and deformations, the cross-section properties are interpolated.
SHAPE-THIN determines the effective cross-sections according to EN 1993-1-3 and EN 1993-1-5 for cold-formed sections. You can optionally check the geometric conditions for the applicability of the standard specified in EN 1993‑1‑3, Section 5.2.
The effects of local plate buckling are considered according to the method of reduced widths and the possible buckling of stiffeners (instability) is considered for stiffened sections according to EN 1993-1-3, Section 5.5.
As an option, you can perform an iterative calculation to optimize the effective cross-section.
You can display the effective cross-sections graphically.
Read more about designing cold-formed sections with SHAPE-THIN and RF-/STEEL Cold-Formed Sections in this technical article: Design of a Thin-Walled, Cold-Formed C-Section According to EN 1993-1-3.
- What is the purpose of a fillet weld in SHAPE‑THIN?
- How can I display shear stresses on null elements in SHAPE‑THIN?
- Is it possible to model cold-formed sections in SHAPE‑THIN 8 and to design them in RF‑/STEEL Cold-Formed Sections?
- When calculating a cross-section, I get a message saying that the weld is not connected to two elements. What should I do?
- I would like to calculate the results, such as ordinates, static moments, stresses, at a specific location of a cross-section. What should I do?
- How can I calculate stresses in SHAPE‑THIN?
- How can I adjust inserted cross-sections in SHAPE‑THIN?
- During the calculation, I get a warning that some elements are connected to the buckling panel, but are not defined as stiffeners (Figure 1). What should I do?
Why are my steel members not being designed for stability in RF-STEEL AISC?
- My section is classified as Class 4 and non-designable in RF-/STEEL CSA. However, my manual calculation shows a different class. Why the difference?