超高层建筑消防安全评价——以上海中心大厦为例

Jian Jiang , Lingzhu Chen , Shouchao Jiang , Guo-Qiang Li , Asif Usmani
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引用次数: 21

摘要

上海中心大厦是由巨型框架-核心-支腿侧抗体系组成的既有超高层建筑。其结构在火灾中的安全性一直受到人们的重视。本文对上海中心大厦在火灾情况下的性能进行了独立评估。考虑了两种火灾情景:标准火灾和参数火灾。首先对混凝土核心、巨型柱、组合楼板、支腿桁架和带桁架等关键构件的耐火性能进行了检测。其实际耐火时间远远超过设计耐火时间。将外围钢柱、带桁架腹板等耐火性能较弱的构件去除,研究剩余结构对连续倒塌的抗力。结果表明:上海中心大厦对火致渐进倒塌具有最小3 h的耐火性能;与钢构件相比,混凝土构件具有较小的残余位移。对于其他类似结构的设计,建议对支腿桁架进行有效的防火保护,以保证核心与巨型柱之间的连接。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fire safety assessment of super tall buildings: A case study on Shanghai Tower

Shanghai Tower is an existing super high-rise building composed of mega frame-core-outrigger lateral resisting systems. Its structural safety in fire has been given great attention. This paper presents an independent review of the performance of Shanghai Tower in case of fire. Two fire scenarios: standard fires and parametric fires have been considered. The fire resistance of key component, including the concrete core, mega columns, the composite floor, outrigger trusses and belt trusses were examined first. Their real fire resistance periods proved to be far beyond the design fire resistance. The components with weak fire resistance such as peripheral steel columns and web members of belt trusses were then removed to study the resistance of the residual structure against progressive collapse. The results show that Shanghai Tower has a minimum of 3 h fire resistance against fire-induced progressive collapse. The concrete components have smaller residual displacements compared to the steel components. It is recommended, for the design of other similar structures, that effective fire protection should be provided for the outrigger trusses to guarantee the connection between the core and mega columns.

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