Abstract
Beam columns with box sections, especially if fabricated from plates made of high strength steels, often lead to slender elements with class 4 cross-sections, i. e. sections that are susceptible to local buckling. The presented comprehensive study compares the load bearing capacity, based on nonlinear FEM-models, with the predictions of Eurocode 3. The definitions of local imperfections in Eurocode EN 1993-1-5 are presented and discussed. The detected, significantly increased loading capacity of columns with fixed ends and antisymmetric moment distributions is an indication that, even for class 4 sections, a hinged-truss model may be used in the global analysis with sufficient safety. This is shown for the design of members of a single-span truss girder by means of a numerical example.
Translated title of the contribution | Beam columns with thin walled boxed sections: Load bearing behaviour and increased loading capacity compared with Eurocode 3. |
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Original language | German |
Pages (from-to) | 880-889 |
Journal | Stahlbau |
Volume | 83 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2014 |
Fields of Expertise
- Advanced Materials Science