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Torsional and flexural-torsional buckling of compressed steel members in fire
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.
Highlights Torsional and flexural-torsional buckling of compressed steel members in fire Angles, Tee and Cruciform Class 1–3 sections with varying slenderness are studied. EN1993-1-2 overestimates the resistance in a wide range of slenderness. New buckling curve is proposed and proved to be safe. Flexural buckling governs the failure of Cruciform sections of practical interest.
Torsional and flexural-torsional buckling of compressed steel members in fire
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.
Highlights Torsional and flexural-torsional buckling of compressed steel members in fire Angles, Tee and Cruciform Class 1–3 sections with varying slenderness are studied. EN1993-1-2 overestimates the resistance in a wide range of slenderness. New buckling curve is proposed and proved to be safe. Flexural buckling governs the failure of Cruciform sections of practical interest.
Torsional and flexural-torsional buckling of compressed steel members in fire
Possidente, Luca (author) / Tondini, Nicola (author) / Battini, Jean-Marc (author)
2020-04-29
Article (Journal)
Electronic Resource
English
Torsional Buckling of Steel Members: the Flexural Buckling Analogy
| Online Contents | 2001
Torsional Buckling of Steel Members: The Flexural Buckling Analogy
| SAGE Publications | 2001
Torsional-flexural buckling of thin-walled members
| Engineering Index Backfile | 1965
Torsional-flexural buckling of thin-walled members
| Engineering Index Backfile | 1964