An Analytical Design Approach for Outstand Steel Plates in Compression
Auteur(s): |
Jurgen Becque
(University of Cambridge Cambridge UK)
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Médium: | article de revue |
Langue(s): | anglais |
Publié dans: | ce/papers, septembre 2023, n. 3-4, v. 6 |
Page(s): | 1821-1825 |
DOI: | 10.1002/cepa.2535 |
Abstrait: |
Current design approaches to determine the capacity of plates in local buckling are based on empirical equations, in particular the widely used Winter equation. In contrast, this research presents a novel analytical approach, focusing on outstand steel plates. The derivation of the method is rooted in the Föppl‐von Karman equations, which are first simplified by making a number of basic mechanical assumptions about the post‐buckling stress field. An approximate solution to the emerging differential equation is obtained, which assumes a polynomial displacement profile in the transverse direction of the plate. This solution agrees eminently well with the results of finite element simulations, both for the case of a geometrically perfect plate and a plate containing an initial imperfection. By combining the obtained post‐buckling stress profile with a failure criterion based on von Karman's effective width concept, a closed‐form strength equation for compressed outstand plates is derived, which is seen to be a sole function of the plate slenderness and a dimensionless imperfection factor. This equation agrees closely with the available experimental data. |
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10767254 - Publié(e) le:
17.04.2024 - Modifié(e) le:
17.04.2024