Point elements are available in the SHAPE‑THIN program under 'Insert' → 'Model Data' → 'Point Elements'.
Point elements are taken into account when calculating cross-section properties. Their component should not be too great in order to guarantee the validity of the thin-walled cross-section theory.
The analytical calculation of the torsion moment of inertia does not include the point elements. Also, no stresses are determined for point elements.
Types of Point Elements
Four types of point elements are possible:
It is possible to set the point elements graphically at snap points of a cross-section.
External Pressure Coefficients, Cp, for Domed Roofs with a Circular Base (according to Figure 27.3-2 )
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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