Evaluation of the Fire Behavior of Low-Rise Eccentrically Braced Frame Structures Under Different Fire Scenarios

IF 2.3 3区工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY Fire Technology Pub Date : 2024-06-03 DOI:10.1007/s10694-024-01587-9

Seyed Javad Mortazavi, Iman Mansouri, Alireza Farzampour, Eleni Retzepis, Jong Wan Hu

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Abstract

The structural system of eccentrically braced frames (EBFs) is one of the most common structural systems with a excellent seismic performance in highly seismic areas. This study investigates the performance of this structural system in low-rise buildings. For this purpose, a three-story structure with this structural system is designed, and its behavior is investigated under six different fire scenarios. To analyze the structure under fire loads, the temperature distribution in the members exposed to the fire is first evaluated using the finite element heat transfer analysis method. Using the non-linear time history thermo-mechanics analysis method, the investigated frame is then analyzed, and the displacement and internal forces of the members are obtained. The results of these analyses show that in scenarios where the fire occurs in braced bays, the structure remains stable for a longer time, and the combination of braces and link beams is effective in redistributing the load applied to the adjacent columns.

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不同火灾情况下低层偏心支撑框架结构的火灾行为评估

偏心支撑框架（EBF）结构体系是最常见的结构体系之一，在地震高发区具有卓越的抗震性能。本研究探讨了这种结构体系在低层建筑中的性能。为此，我们设计了一个采用这种结构体系的三层结构，并对其在六种不同火灾情况下的行为进行了研究。为了分析火灾荷载下的结构，首先使用有限元传热分析方法评估了暴露在火灾中的构件的温度分布。然后使用非线性时间历程热力学分析方法对所研究的框架进行分析，并得出构件的位移和内力。这些分析结果表明，在火灾发生在支撑托架的情况下，结构在较长时间内保持稳定，支撑和连梁的组合能有效地重新分配施加到相邻柱子上的荷载。

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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.