Fire resistance of austenitic stainless steel beams with rectangular hollow sections

IF 2 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Fire and Materials Pub Date : 2023-07-01 DOI:10.1002/fam.3167

N. Lopes, F. Arrais, P. Vila Real, M. Alves, L. Mesquita, P. Piloto, J. Pinho da Cruz

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引用次数: 0

Abstract

This paper presents a study on the structural behaviour of stainless steel profiles under fire conditions. An experimental campaign of three-point bending tests on rectangular hollow section beams of the grade 1.4301 (also known as 304) were conducted, considering both steady-state and transient state conditions. Prior to those tests, the mechanical characterization of the stainless steel was investigated. The constitutive laws obtained by tensile tests at high temperatures are compared with those recommended in Eurocode 3, whose respective material models were recently proposed for modifications, still requiring complete validation. In addition, numerical modelling of the bending tests has been performed afterwards achieving close approximation to the observed experimental results. Finally, analytical methods to predict the load-deflection behaviour are also presented. Good agreement between the considered methodologies was attained validating their application on the prediction of the fire behaviour of stainless steel beams.

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矩形空心截面奥氏体不锈钢梁的耐火性能

本文研究了不锈钢型材在火灾条件下的结构行为。在稳态和瞬态条件下，对等级为 1.4301（也称为 304）的矩形空心型钢进行了三点弯曲试验。在这些试验之前，对不锈钢的机械特性进行了研究。通过高温拉伸试验获得的构成法则与欧洲规范 3 推荐的构成法则进行了比较，欧洲规范 3 最近提出了相应的材料模型修改建议，但仍需进行全面验证。此外，还对弯曲试验进行了数值建模，之后得出的结果与观察到的实验结果非常接近。最后，还介绍了预测荷载-挠度行为的分析方法。所考虑的方法之间取得了良好的一致性，验证了它们在预测不锈钢梁火灾行为方面的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fire and Materials 工程技术-材料科学：综合

CiteScore

4.60

自引率

5.30%

发文量

审稿时长

3 months

期刊介绍： Fire and Materials is an international journal for scientific and technological communications directed at the fire properties of materials and the products into which they are made. This covers all aspects of the polymer field and the end uses where polymers find application; the important developments in the fields of natural products - wood and cellulosics; non-polymeric materials - metals and ceramics; as well as the chemistry and industrial applications of fire retardant chemicals. Contributions will be particularly welcomed on heat release; properties of combustion products - smoke opacity, toxicity and corrosivity; modelling and testing.