Stability and design of stainless steel hollow section columns at elevated temperatures
Stability and design of stainless steel hollow section columns at elevated temperatures
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DOI：
10.1016/j.engstruct.2023.116935
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发表时间：
2023-12
影响因子：
5.5
通讯作者：
C. Quan;M. Kucukler
中科院分区：
文献类型：
--
作者：
C. Quan;M. Kucukler
本文研究了不锈钢圆形、椭圆形、方形和矩形空心截面（CHS、EHS、SHS 和 RHS）柱在高温下的稳定性和设计。采用非线性壳有限元模型进行全面的参数研究，从而生成有关不锈钢空心截面柱在高温下的行为和阻力的广泛基准结构性能数据。总共考虑了 26,760 个高温下冷成型和热轧奥氏体、双相和铁素体不锈钢 CHS、EHS、SHS 和 RHS 柱，并考虑了各种构件细长度、横截面几何形状、横截面细长度和高温水平。针对火灾中的不锈钢空心截面柱提出了新的弯曲屈曲设计规则，该规则一致考虑2%总应变f2,θ下的高温强度作为所有截面类别的参考材料强度。所提出的新设计规则的准确性、安全性和可靠性在各种情况下进行了评估。还与欧洲钢结构防火设计标准 EN 1993-1-2 [1] 的柱防火设计规则所获得的结果进行了比较。事实证明，相对于 EN 1993-1-2 [1] 的柱防火设计规定，拟议的新设计规则为高温下不锈钢空心截面柱提供了更准确、安全和可靠的抗弯屈曲阻力预测。
This paper investigates the stability and design of stainless steel circular, elliptical, square and rectangular hollow section (CHS, EHS, SHS and RHS) columns at elevated temperatures. Nonlinear shell finite element models are employed to conduct comprehensive parametric studies whereby extensive benchmark structural performance data on the behaviour and resistance of stainless steel hollow section columns at elevated temperatures is generated. In total, 26,760 cold-formed and hot-rolled austenitic, duplex and ferritic stainless steel CHS, EHS, SHS and RHS columns at elevated temperatures are taken into account, considering various member slendernesses, cross-section geometries, cross-section slendernesses and elevated temperature levels. New flexural buckling design rules are put forward for stainless steel hollow section columns in fire, which consistently considers the elevated temperature strength at 2% total strainf2,θas the reference material strength for all cross-sections classes. The accuracy, safety and reliability of the proposed new design rules are assessed for a wide range of cases. Comparisons are also made against the results obtained through the column fire design rules of the European structural steel fire design standard EN 1993-1-2 [1]. It is demonstrated that the proposed new design rules furnish more accurate, safe-sided and reliable flexural buckling resistance predictions for stainless steel hollow section columns at elevated temperatures relative to the column fire design provisions of EN 1993-1-2 [1].