Article Dans Une Revue Journal of Constructional Steel Research Année : 2024

Uniform and tapered welded I-sections: Lateral buckling of columns and out-of-plane buckling of beam-columns

Résumé

The out-of-plane buckling resistance of welded I-section columns and beam-columns is investigated using an extensive parametric study. Non-linear analyses of uniform and web-tapered doubly symmetric S275 and S355 welded members subjected to an axial force, or to a combined axial force and bending moment are performed. The ultimate resistances are determined for welded members with hot-rolled or flame-cut flanges. The numerical results point to the exceeding conservatism of the Eurocode 3 rules for welded members with flame-cut flanges. Thus, proposals are made to improve the prediction of the weak-axis buckling resistance of welded columns accounting for the flame-cut flanges. The current European rules prove somewhat conservative also for uniform welded columns with hot-rolled flanges having a medium or high slenderness. Thus, a proposal is made to improve the flexural buckling resistance for welded columns with hot-rolled flanges. The design methods proposed for welded members with flame-cut flanges in bending or in compression are used together for welded beam-columns with flame-cut flanges. The proposals are given in the format used in the framework of the Eurocode 3 interaction formulae and General Method.
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hal-04900786 , version 1 (20-01-2025)

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Maxime Lebastard, Maël Couchaux, Alain Bureau, Mohammed Hjiaj. Uniform and tapered welded I-sections: Lateral buckling of columns and out-of-plane buckling of beam-columns. Journal of Constructional Steel Research, 2024, 222, pp.108876. ⟨10.1016/j.jcsr.2024.108876⟩. ⟨hal-04900786⟩
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