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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
04.08: Investigations on the buckling behaviour of slender high strength steel plates under multiaxial stresses
Current design code EN 1993‐1‐5 [1] offers, apart from the possibility of using the Finite Element Method, generally two different methods for the design of slender plates subjected to plate buckling. The first method, called “effective width method”, is based on the reduction of the cross‐section area. The second method, which may be used for the design of plated structures, is the so called “reduced stress method”. It is a classic concept that limits the allowable stresses in the plate and uses a kind of von‐Mises criterion to check the combination of different stresses. The reduction of the allowable stresses in comparison with the full strength is a function of the slenderness of the considered plate and depends on the critical buckling stress. For the “reduced stress method”, according to EN 1993‐1‐5 the determination of the plate slenderness is based on the complete stress field, resulting in a single plate slenderness without the differentiation for the individual acting forces. This gives theoretically the possibility of also considering tension stresses for a multiaxially loaded plate subjected to buckling, as there is a direct influence when determining the plate slenderness.
Furthermore, recent investigations conducted by [2] on unstiffened plates under biaxial compression, showed that the current rules EN 1993‐1‐5 may give unsafe results, so that a correction is proposed by introducing a so‐called “V‐factor” in the design formula. [4] presented the influence of tension stresses on the buckling behaviour of multiaxially loaded plates and developed a “V‐factor” for the tension‐compression interaction domain to profit from the favourable effects of tension stresses.
The aim of this paper, based on [4], is to show experimental as well as numerical analyses on the buckling behaviour of multiaxially loaded high strength steel plates. The numerical simulations are compared to the test results. Furthermore, the validity of the proposed V‐factor is studied. Thus, the investigations increase the insight in the buckling behaviour under multiaxial stress states allowing for an enhancement of the current design rules, focusing on the reduced stress method according to Chapter 10, EN 1993‐1‐5.
04.08: Investigations on the buckling behaviour of slender high strength steel plates under multiaxial stresses
Current design code EN 1993‐1‐5 [1] offers, apart from the possibility of using the Finite Element Method, generally two different methods for the design of slender plates subjected to plate buckling. The first method, called “effective width method”, is based on the reduction of the cross‐section area. The second method, which may be used for the design of plated structures, is the so called “reduced stress method”. It is a classic concept that limits the allowable stresses in the plate and uses a kind of von‐Mises criterion to check the combination of different stresses. The reduction of the allowable stresses in comparison with the full strength is a function of the slenderness of the considered plate and depends on the critical buckling stress. For the “reduced stress method”, according to EN 1993‐1‐5 the determination of the plate slenderness is based on the complete stress field, resulting in a single plate slenderness without the differentiation for the individual acting forces. This gives theoretically the possibility of also considering tension stresses for a multiaxially loaded plate subjected to buckling, as there is a direct influence when determining the plate slenderness.
Furthermore, recent investigations conducted by [2] on unstiffened plates under biaxial compression, showed that the current rules EN 1993‐1‐5 may give unsafe results, so that a correction is proposed by introducing a so‐called “V‐factor” in the design formula. [4] presented the influence of tension stresses on the buckling behaviour of multiaxially loaded plates and developed a “V‐factor” for the tension‐compression interaction domain to profit from the favourable effects of tension stresses.
The aim of this paper, based on [4], is to show experimental as well as numerical analyses on the buckling behaviour of multiaxially loaded high strength steel plates. The numerical simulations are compared to the test results. Furthermore, the validity of the proposed V‐factor is studied. Thus, the investigations increase the insight in the buckling behaviour under multiaxial stress states allowing for an enhancement of the current design rules, focusing on the reduced stress method according to Chapter 10, EN 1993‐1‐5.
04.08: Investigations on the buckling behaviour of slender high strength steel plates under multiaxial stresses
Pourostad, Vahid (Autor:in) / Zizza, Antonio (Autor:in) / Kuhlmann, Ulrike (Autor:in)
ce/papers ; 1 ; 878-887
01.09.2017
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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