Torsional and flexural-torsional buckling of compressed steel members are relevant phenomena for monosymmetric and built-up cross-sections frequently employed in bracing systems or in truss structures. Despite the great interest shown by researchers relative to the instability of steel elements in fire, there is a lack of studies on the torsional and flexural-torsional buckling behaviour of steel members in compression at elevated temperature, and no provisions are given in EN 1993-1-2. In this work, a comprehensive numerical investigation of the behaviour of axially compressed angles, Tee and cruciform steel cross-sections at elevated temperature was performed. In this respect, a parametric study was carried out on Class 1 to 3 profiles subjected to uniform temperature distribution. It was found that the buckling curve given in EN 1993-1-2 provides unconservative results for slenderness ranges of practical interest. Improved buckling curves to better predict the behaviour of angles, Tee and cruciform compressed cross-sections at elevated temperature were proposed. © 2020 Elsevier Ltd. All rights reserved.

Torsional and flexural-torsional buckling of compressed steel members in fire / Possidente, Luca; Tondini, Nicola; Battini, Jean-Marc. - In: JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH. - ISSN 0143-974X. - 171:(2020), pp. 106130.1-106130.14. [10.1016/j.jcsr.2020.106130]

Torsional and flexural-torsional buckling of compressed steel members in fire

Possidente, Luca;Tondini, Nicola;
2020-01-01

Abstract

Torsional and flexural-torsional buckling of compressed steel members are relevant phenomena for monosymmetric and built-up cross-sections frequently employed in bracing systems or in truss structures. Despite the great interest shown by researchers relative to the instability of steel elements in fire, there is a lack of studies on the torsional and flexural-torsional buckling behaviour of steel members in compression at elevated temperature, and no provisions are given in EN 1993-1-2. In this work, a comprehensive numerical investigation of the behaviour of axially compressed angles, Tee and cruciform steel cross-sections at elevated temperature was performed. In this respect, a parametric study was carried out on Class 1 to 3 profiles subjected to uniform temperature distribution. It was found that the buckling curve given in EN 1993-1-2 provides unconservative results for slenderness ranges of practical interest. Improved buckling curves to better predict the behaviour of angles, Tee and cruciform compressed cross-sections at elevated temperature were proposed. © 2020 Elsevier Ltd. All rights reserved.
2020
Possidente, Luca; Tondini, Nicola; Battini, Jean-Marc
Torsional and flexural-torsional buckling of compressed steel members in fire / Possidente, Luca; Tondini, Nicola; Battini, Jean-Marc. - In: JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH. - ISSN 0143-974X. - 171:(2020), pp. 106130.1-106130.14. [10.1016/j.jcsr.2020.106130]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/279913
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