Tapered Steel Frame Structure
Model to Download
In EN 1993-1-1, the General Method was introduced as a design format for stability designs, which can be used for planar systems with any boundary conditions and variable structural height. The design checks can be performed for a loading in the main supporting plane and simultaneous compression. The stability cases of lateral-torsional buckling and flexural buckling are analyzed from the main supporting plane, that is, about the weak component axis. This model was used to explain the question of how flexural buckling in the main supporting plane can be verified in this context.
Model Used in
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.
- I design a single-symmetric cross-section (T‑section) and get the message "Non-designable: ER056) The general method is applicable only for I‑sections." Why?
- I design a set of members with a uniform, double-symmetric cross-section and get the message: "Non-designable: ER051) Moment about z‑axis on asymmetric cross-section, taper or set of members." Why?
- Are boundary conditions transferred from RFEM/RSTAB when performing the analysis in RF‑/STEEL Warping Torsion or General Method in RF‑/STEEL EC3?
- I perform an analysis according to General Method 6.3.4 EN 1993‑1‑1 and have activated the addition "Adapted Method According to Naumes." The critical factor α*crit is displayed in red. Should I be worried?
- How can I display membrane stresses in the results of RF‑STEEL Surfaces?
- What is the meaning of the superposition according to the CQC rule in a dynamic analysis??
- How is the automatic creation of c/t-parts carried out?
- I design a set of members by using the equivalent member method in RF‑/STEEL EC3, but the calculation fails. The system is unstable, delivering the message "Non-designable - ER055) Zero value of the critical moment on the segment."What could be the reason?
- My aim is to mesh a circular hole plate in a mapped way. Is such a meshing possible in RFEM?
- The design ratio of the cross-section check is different for the RF‑/STEEL and RF‑/STEEL EC3 add-on module. What is the reason?