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首页> 外文期刊>Journal of structural engineering >Buckling Curves for Cold-Formed Stainless-Steel Columns and Beams
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Buckling Curves for Cold-Formed Stainless-Steel Columns and Beams

机译：冷成型不锈钢柱和梁的屈曲曲线

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摘要

This paper summarizes the background information and methodology used to derive a set of buckling curves proposed for cold-formed stainless steel columns and beams incorporated in the recently revised SEI/ASCE 8-21 Specification. The study is based on experimental and numerical data collected from the literature on cold-formed stainless steel columns and beams featuring ASTM grades 304, 2101, 430, 404, and 443. Because most of the investigated specimens exhibited slender cross-sections, both the effective width method (EWM) and the direct strength method (DSM) are considered to account for the effect of interaction between global and local buckling on member strength. Buckling curves for flexural buckling and lateral-torsional buckling codified in current international standards are assessed based on the SEI/ASCE 8 reliability requirements, and new curves are derived accordingly. The proposed new buckling curves include expressions to account for the postyielding capacity of stainless steel columns and the inelastic buckling resistance of cold-formed stainless steel beams. In addition, a new local buckling strength curve for members in flexure is proposed in the format of the DSM and shown to provide equivalent design resistances to the EWM.
机译：本文总结了用于推导出一组屈曲曲线的背景信息和方法，提出用于冷成形不锈钢柱和梁，该曲线在最近修正的SEI / asce 8-21规范中结合。该研究基于从文献中收集的实验和数值数据，从而在冷成型不锈钢柱和梁中采用ASTM等级304,2101,430,404和443。由于大多数研究标本表现出细长的横截面有效的宽度法（EWM）和直接强度法（DSM）被认为考虑了全局和局部屈曲与成员强度相互作用的影响。根据SEI / ASCE 8可靠性要求评估在当前国际标准中编写的弯曲弯曲和横向扭转曲线的屈曲曲线，并相应地得出新曲线。所提出的新屈曲曲线包括表达，以考虑不锈钢柱的后屈节能和冷成型不锈钢梁的非弹性屈曲电阻。此外，以DSM的格式提出了弯曲构件的新局部屈曲强度曲线，并显示为EWM提供等效的设计电阻。

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