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KB 000526 | Automatically ignore curved c/t-parts when classifying cross-sections
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First Steps with RFEM
Description
The cross-section classification according to EN 1993‑1‑1 and EN 1993‑1‑5 can be carried out automatically in the RF‑/STEEL EC3 add-on module. The maximum c/t ratios are specified in the standard for straight cross-section parts. There are no normative provisions for curved cross-section parts and therefore the cross-section classification cannot be performed for such cross-section parts.
Keywords
Dlubal Knowledge Base Cross-sectional classification Cross-section class Arc Buckling Dlubal KB Knowledge Base Technical Contribution
Links
- Useful Tools for Fast Generation of Structures in RFEM
- Useful Tools for Fast Generation of Structures in RSTAB
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Automatically ignore curved c/t-parts when classifying cross-sections
The classification of cross-sections according to EN 1993-1-1 and EN 1993-1-5 can be carried out automatically in the RF-/STEEL EC3 add-on module. The maximum c/t ratios are specified in the standard for straight cross -section parts. There are no normative specifications for curved cross -section parts and therefore the cross -section classification cannot be performed for these cross -section parts.
![Distribution of Forces and Moments in Column Base According to [1]](/-/media/Images/website/img/000001-010000/009601-009700/009638.png?la=en&mlid=7D34CEAAE7354583A29169095622B515&hash=D5A1CD829CEAC6F92DF0C68F3F0F37A7E0C0E89B)
![System and Loading According to [1]](/-/media/Images/website/img/000001-010000/009601-009700/009634.png?la=en&mlid=F0F0A23924B8424CA1C2905961DF676B&hash=6AC023A421BDDF6BFE2AC5D69132D2F81A0C365A)
SHAPE-THIN | Cold-Formed Sections
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.
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