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FAQ 003294 | Why is it not possible to modify the thickness of single cross-section elements in SHAPE‑THIN?
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QuestionWhy is it not possible to modify the thickness of single cross-section elements in SHAPE‑THIN?
AnswerThese cross-section elements belong to an inserted cross-section, and therefore, they cannot be edited individually.
If you want to modify the individual elements of an inserted cross-section, you can do it in several ways:
1. Selecting another cross-section from cross-section libraryIf you edit the cross-section or select another one, the corresponding elements will be changed as well. Click the "Parametric Input" button to modify the specified cross-section properties. This option is especially useful if you want to keep the base geometry and symmetry of the original cross-section. The sheet thickness and the total height or width can be adjusted very easily in this way.
2. Reducing section to individual elementsIn this way, you can create single, independent elements from the inserted cross-section. Subsequently, they can be edited like the elements created normally. This procedure is useful, for example, if you want to change the base geometry of the original cross-section.
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Knowledge Base Articles
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.
Product Features Articles
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.
Frequently Asked Questions (FAQ)
- 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?
- Why is it not possible to modify the thickness of single cross-section elements 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?
- How can I get the member end forces to design the connections?