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Storey-based stability of unbraced structural steel frames subjected to variable fire loading

机译:可变火荷载下无支撑结构钢框架的基于层的稳定性

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摘要

Structural steel has poor fire resistance properties and often requires thermal protection. Passive thermal protection systems such as insulation for steel members by application of spray-applied fire-resistance materials (SFRM) on surfaces of structural steel members are expensive and represent a significant portion of building costs for steel structures. Also, design codes around the world are progressing toward performance-based approaches rather than prescriptive-based approaches in design for fire safety. However, it is difficult to account realistically for all probable fire scenarios, and the actual fire resistance of a structure may vary significantly depending on the nature of the fire, location of origin and characteristics of the building. A means to define and identify the maximum and minimum fire loading scenarios causing instability of a given structure is therefore desirable. Presented in this paper is a novel global optimization approach for determining the highest temperature, lowest temperature, most localized, and most distributed fire scenarios causing instability for an unbraced structural steel frame. The investigation assumes that the columns are fire protected but the beams are unprotected, and may be extended to apply in other configurations and framing materials. (C) 2017 Elsevier Ltd. All rights reserved.
机译:结构钢的耐火性能差,通常需要热保护。被动热保护系统,例如通过在结构钢构件表面上喷涂喷涂的耐火材料(SFRM)来为钢构件绝缘,是昂贵的,并且占钢结构建筑成本的很大一部分。此外,世界各地的设计规范正在朝着基于性能的方法而不是基于防火的设计性方法发展。但是,很难对所有可能的火灾情况进行现实地解释,并且建筑物的实际耐火性可能会根据火灾的性质,起源位置和建筑物的特性而有很大不同。因此,需要一种方法来定义和识别引起给定结构不稳定性的最大和最小火荷载情况。本文提出了一种新颖的全局优化方法,用于确定导致无支撑结构钢框架失稳的最高温度,最低温度,最局部和最分散的火灾场景。研究假设柱子是防火的,但梁没有保护,并且可以扩展以适用于其他配置和框架材料。 (C)2017 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Journal of Constructional Steel Research》 |2018年第8期|145-153|共9页
  • 作者

    Xu Lei; Ma Terence; Zhuang Yi;

  • 作者单位

    Univ Waterloo, Dept Civil & Environm Engn, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada;

    Univ Waterloo, Dept Civil & Environm Engn, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada;

    RBS Architectural Engn Design Associates, 507-140 West Dongfeng Rd, Guangzhou, Guangdong, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Stability; Steel; Frame; Fire; Optimization; Scenario;

    机译:稳定性;钢;框架;防火;优化;方案;
  • 入库时间 2022-08-18 00:14:15

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