Lateral-torsional buckling of partially protected steel I-beams exposed to fire

被引：2
|
作者：
Doula, Moustafa Hadj [1 ]
Ziane, Noureddine [1 ]
Ruta, Giuseppe [2 ,3 ]
Meftah, Sid Ahmed [1 ]
机构：
[1] Univ Djillali Liabes Sidi Bel Abbes, Lab Struct & Mat Avances Genie Civil & Travaux Pu, Sidi Bel Abbes, Algeria
[2] Univ Roma La Sapienza, Dept Struct & Geotech Engn, Rome, Italy
[3] Natl Grp Math Phys, Rome, Italy
来源：
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH | 2021年 / 184卷
关键词：
Steel; Thin-walled beams; Mono-symmetric sections; Thermal gradient; Fire; ELEVATED-TEMPERATURES; STRUCTURAL BEHAVIOR; COLUMNS; ELEMENTS;
D O I：
10.1016/j.jcsr.2021.106825
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This paper proposes a new model for thin-walled open profiles able to predict bending-torsion buckling of thermally restrained steel I beams with bi-and mono-symmetric cross-sections. Refined nonlinear kinematics accounts for the shifts of the centroid and shear centre generated by the thermal gradient. The eigenvalue problem derived from geometrically nonlinear balance equations is solved via power series and NewtonRaphson technique. Several examples are presented; the results are compared with those provided by Abaqus simulation and the literature. (C) 2021 Elsevier Ltd. All rights reserved.
引用
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页数：10
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