Fires Following Earthquake Fragility Functions for Protected Steel Braced Frames

IF 2.3 3区工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY

Fire Technology Pub Date : 2024-01-31 DOI:10.1007/s10694-023-01526-0

Patrick Covi, Nicola Tondini, Amir Sarreshtehdari, Negar Elhami-Khorasani

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Abstract

The paper describes the outcomes of the analysis of a steel braced frame protected with spray-applied fire resistive material and subjected to fires following earthquake (FFE). Nonlinear time-history analyses were performed in order to evaluate the seismic response. Then, the post-earthquake fire ignitions within selected compartments were considered based on the damage suffered by the structure, which was estimated according to the inter-storey drift ratio and floor acceleration. Natural fire curves were determined by means of zone models. Thus, compartmentation and opening characteristics were included in the analysis. Finally, thermomechanical analyses were completed and failure criteria based on the column and beam displacement and rate of displacement were investigated. The results of the probabilistic analyses were used to produce fragility functions to evaluate the probability of exceeding a limit state conditioned on an intensity measure in the context of FFE.

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地震后发生火灾时受保护钢支撑框架的脆性函数

本文介绍了对喷涂防火材料保护的钢支撑框架进行地震后火灾（FFE）分析的结果。为了评估地震响应，进行了非线性时程分析。然后，根据层间漂移率和楼层加速度估算出的结构受损情况，考虑了选定隔间内的震后火灾。自然火灾曲线是通过区域模型确定的。因此，隔间和开口特征也被纳入了分析中。最后，完成了热力学分析，并研究了基于柱、梁位移和位移率的失效标准。概率分析的结果被用于生成脆性函数，以评估在 FFE 条件下强度测量值超过极限状态的概率。

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 Technology 工程技术-材料科学：综合

CiteScore

6.60

自引率

14.70%

发文量

137

审稿时长

7.5 months

期刊介绍： Fire Technology publishes original contributions, both theoretical and empirical, that contribute to the solution of problems in fire safety science and engineering. It is the leading journal in the field, publishing applied research dealing with the full range of actual and potential fire hazards facing humans and the environment. It covers the entire domain of fire safety science and engineering problems relevant in industrial, operational, cultural, and environmental applications, including modeling, testing, detection, suppression, human behavior, wildfires, structures, and risk analysis. The aim of Fire Technology is to push forward the frontiers of knowledge and technology by encouraging interdisciplinary communication of significant technical developments in fire protection and subjects of scientific interest to the fire protection community at large. It is published in conjunction with the National Fire Protection Association (NFPA) and the Society of Fire Protection Engineers (SFPE). The mission of NFPA is to help save lives and reduce loss with information, knowledge, and passion. The mission of SFPE is advancing the science and practice of fire protection engineering internationally.