Torsional Buckling Analysis of Longitudinal and Transverse Stiffeners

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Torsional buckling analysis of transverse and longitudinal stiffeners with open cross‑sections is described in DIN EN 1993‑1‑5, Chapter 9. There is a difference between the simplified and precise method, which considers the warping stiffness of the buckling panel. The simplified method applies Equation 9.3 of DIN EN 1993‑1‑5. If warping stiffness is to be taken into account, either Eq. 9.3 or Eq. 9.4 should be followed. Both design methods are implemented in PLATE‑BUCKLING.

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