主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2022, Vol. 41 ›› Issue (10): 1390-1395.

• • 上一篇    下一篇

震后火作用下装配式地铁车站抗火性能分析

蔡新江1，李孝杰1,2，毛小勇1,2，田石柱1,2   

  1. （1.苏州科技大学 土木工程学院，江苏 苏州 215011； 2. 江苏省结构工程重点实验室，江苏 苏州 215011)
  • 出版日期:2022-10-15 发布日期:2022-10-15
  • 通讯作者: 国家自然科学基金项目（51778395）；江苏高校“青蓝工程”（2018）；江苏省“333 工程”（2018）；江苏高校境外研修计划
  • 作者简介:作者简介：蔡新江（1981- ），男，满族，黑龙江省五常人，苏州科技大学副教授，博士，主要从事结构抗震抗火性能分析研究，江苏省苏州市高新区滨河路，215011。

Fire resistance of assembled subway station under post earthquake fire

Cai Xinjiang1,2, Li Xiaojie1, Mao Xiaoyong1,2, Tian Shizhu1,2   

  1. (1. Department of Civil Engineering, Suzhou University of Science and Technology, Jiangsu Suzhou 215011, China; 2. Jiangsu Province Key Laboratory of Structural Engineering, Jiangsu Suzhou 215011, China)
  • Online:2022-10-15 Published:2022-10-15

摘要： 摘 要：预制装配化是地铁车站建设的一个重要发展方向，其震后火性能研究目前还相对较少。本文建立单层双跨装配式地铁车站三维有限元模型，采用远置边界和HC标准升温曲线，考虑火源位置不同，分别对地震、火灾以及罕遇地震后火灾3种工况下的地铁车站进行变形对比分析。研究结果表明：地震作用下地铁车站呈“M”形破坏，火灾作用下和震后火作用下地铁车站中柱产生弯曲变形；火灾作用下，与顶板和侧墙相比，中柱升温最快，单跨受火时，中柱柱顶与柱底相对位移迅速增大，随后趋向稳定，全跨受火时，中柱变形初始发展较慢，随后突然增大；顶板在单独火灾下与震后火两种工况下的挠度发展趋势相近，侧墙两种工况下变形初始发展相似；单独火灾下与震后火下构件内力反应发展规律相似，考虑地震损伤后，各构件内力变化更明显。

关键词: 关键词：装配式地铁车站, 火灾, 地震次生火灾, 有限元分析

Abstract: Abstract: The injection of high-pressure fluoropropanegas in a small hole of an enclosed chamber was modeled investigate their detail behaviors, which was compared with the corresponding experimental measurements. Based on the numerical simulations, the concentration, temperature and velocity during the injection of high-pressure fluoropropane were analyzed. The simulated results indicated that a flowback of the fluoropropane gas was shown near an obstacle, which resulted in the low concentration at the other side of the obstacle. The experimental measurements showed that the lowest temperature at the nozzle was as cold as -20 ℃ during the accidental leakage of high-pressure fluoropropane. However, the temperature decrease near the electrical equipment is acceptable if they are more than 1.75 m away from the leakage orifice.

Key words: Key words: fire safety, fluoropropane, high-pressure injection, cooling damage, computer room, electrical equipment, numerical simulation