顶板加腋式大跨无柱地铁车站地震响应研究  

Study on Seismic Response of Non-column and Large-span Metro Station Structure with Haunched Roof

作　　者：翟利华[1] 农兴中[1] 刘金燕[1] 林伟波[2] ZHAI Lihua;NONG Xingzhong;LIU Jinyan;LIN Weibo(Guangzhou Metro Design ＆ Research Institute Co. ,Ltd. , GuangZhou, Guangdong 510010, China;School of Civil Engineering and Transportation, South China University of Technology , Guangzhou, Guangdong 510000, China)

机构地区：[1]广州地铁设计研究院有限公司,广东广州510010 [2]华南理工大学土木与交通学院,广东广州510000

出　　处：《施工技术》2018年第13期94-99,共6页Construction Technology

摘　　要：广州地铁11号线将修建多座顶板加腋式大跨无柱地铁车站,为明确该地铁车站结构的地震响应特性,采用非线性地震响应数值模拟方法,研究了顶板加腋式大跨无柱地铁车站在3种地震波作用下的响应特性。研究表明:车站抗震的薄弱部位主要分布在顶板、中板、底板三者与侧墙的连接处以及底板跨中,且各构件之间的刚度差影响构件的破损状态;主频率与土体相近的Kobe波和El-Centro波对车站的破坏力度最大,薄弱部位损伤严重,而广州人工波对车站的破坏力度较小,大震下仅在薄弱部位有局部损伤。顶板加腋后会使腋角部位容易受到损坏而形成"塑性铰",从而使得沿侧墙高度的相对水平位移曲线在该位置出现拐点。根据车站结构的损伤云图及相对水平位移曲线,11m站台宽度和13m站台宽度的地震响应差别不大,地铁车站结构的跨度对其在地震作用下的响应影响不大。Many non-column and large-span subway stations with haunched roof would be built in Guangzhou Metro Line 11. In order to clarify seismic response of this new type metro station structure under three seismic waves with diverse peak ground accelerations,non-linear numerical simulation on seismic response is carried out. Results are summarized as follow： Connections between top/middle/base plates and lateral wall are the weakest part under seismic and different stiffness of structure component obviously influences the damage degree. Subway station has serve damage under Kobe and EI-Centro wave,of which frequency is close to soil＇s. However,Guangzhou artificial wave has limited effects on subway station as local damage would happen under strong seismic. Plastic hinge appears on haunch part of roof plate as a damage symbol,bringing inflection point to relative displacement curve along lateral wall. According to the damage distribution and relative displacement curves of subway station,span has little effect on seismic response of station as limited difference between span of 11 m and 13 m.

关 键 词：地铁车站 大跨度 加腋顶板 地震响应 数值研究 

分 类 号：TU94[建筑科学—建筑技术科学]