With the growing use of stainless steel in the construction and offshore industries, there is an increasing interest and need to study the performance of stainless structures at elevated temperatures. The behavior and design of stainless steel I-section beam-columns in fire is investigated in this paper, addressing a scarcity of previous research on this topic. Finite element (FE) models of stainless steel beam-columns, able to replicate their response at elevated temperatures, are created and validated; the validated models are then used to perform parametric studies to generate extensive benchmark structural performance data. The design rules set out in the European structural steel fire design standard EN 1993-1-2 are assessed and shown to provide rather inaccurate and often unsafe ultimate strength predictions for stainless steel I-section beam-columns in fire. New fire design rules for stainless steel beam-columns are put forward. It is shown that the new proposals are able to offer improved accuracy and design efficiency relative to the EN 1993-1-2 beam-column design rules. The reliability of the proposed design rules is also verified on the basis of the fire design reliability criteria set out by Kruppa [Eurocodes–Fire parts: Proposal for a methodology to check the accuracy of assessment methods, CEN TC 250, Horizontal Group Fire, Document no: 99/130 (1999)], thereby demonstrating the suitability of the proposed design rules for inclusion in the upcoming revised version of EN 1993-1-2.

中文翻译：

---

不锈钢工字形梁柱在高温下的稳定性

随着不锈钢在建筑和海上工业中的使用越来越多，人们越来越感兴趣并需要研究不锈钢结构在高温下的性能。本文研究了不锈钢工字形梁柱在火灾中的行为和设计，解决了以往对该主题研究的不足。创建并验证了不锈钢梁柱的有限元 (FE) 模型，能够复制它们在高温下的响应；然后使用经过验证的模型进行参数研究，以生成广泛的基准结构性能数据。对欧洲结构钢防火设计标准 EN 1993-1-2 中规定的设计规则进行了评估，并显示为不锈钢 I 型截面梁柱在火灾中提供了相当不准确且通常不安全的极限强度预测。提出了新的不锈钢梁柱防火设计规则。结果表明，相对于 EN 1993-1-2 梁柱设计规则，新提案能够提供更高的精度和设计效率。提议的设计规则的可靠性也在 Kruppa 规定的消防设计可靠性标准的基础上得到验证 [欧洲规范-消防部件：关于检查评估方法准确性的方法的建议，CEN TC 250，水平群火灾，文件编号：99/130 (1999)]，