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。
Prefabrication and assembly is an important development direction of subway station, and the research on its postearthquake fire performance is relatively few at present. In this paper, the three-dimensional finite element model of single-layer double span assembled subway station is established. The deformation of the station under three working conditions of earthquake, fire and fire after earthquake is compared and analyzed by using the far boundary and HC standard temperature rise curve and considering the location of fire source. The results show that the subway station is damaged in "M" shape under earthquake, and the center column of subway station is bent and deformed under fire and post-earthquake fire;under the action of fire, compared with the roof and side wall, the temperature rise of the middle column is the fastest. When a single span is under fire, the relative displacement between the top and bottom of the middle column increases rapidly and then tends to be stable. When a full span is under fire, the deformation of the middle column initially develops slowly and then increases suddenly;the deflection development trend of roof under single fire and post-earthquake fire is similar, and the initial deformation development of side wall is similar;the development law of internal force response under separate fire is similar to that after earthquake. Considering the earthquake damage, the internal force of each component changes more obviously.
作者
蔡新江
李孝杰
毛小勇
田石柱
Cai Xinjiang;Li Xiaojie;Mao Xiaoyong;Tian Shizhu(Department of Civil Engineering,Suzhou University of Science and Technology,Jiangsu Suzhou 215011,China;Jiangsu Province Key Laboratory of Structural Engineering,Jiangsu Suzhou 215011,China)
出处
《消防科学与技术》
CAS
北大核心
2022年第10期1390-1395,共6页
Fire Science and Technology
基金
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。
关键词
装配式地铁车站
火灾
地震次生火灾
有限元分析
prefabricated subway station
fire
post-earthquake fire
finite element analysis
作者简介
蔡新江(1981-),男,满族,黑龙江五常人,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。
