【作者】 蒋英礼；

【导师】 赵伯明；

【作者基本信息】 北京交通大学 ， 岩土工程， 2009， 硕士

【摘要】 随着我国经济的快速发展,我国城市地铁建设的规模正迅速扩大,我国建有或规划建设地铁或轻轨的城市已有30多个城市。地铁地下结构兼具有人防工程的作用,担负着重要的社会功能,一旦发生破坏,将会给社会带来巨大的经济损失和人员伤亡。研究软土地基地铁地下结构的地震响应对制定地铁抗震设计规范具有重要的参考价值。本文的主要内容包括:（1）利用ANSYS建立软土地铁地下车站在地震作用下的三维数值模型,通过ANSYS-FLCA^3D接口导入有限差分软件FLCA^3D,并进行数值模拟计算。（2）以汶川地震发生时绵竹市清平乡监测站获得的强震记录为基岩地震输入波,考虑只输入水平向地震波,只输入竖直向地震波以及同时输入水平向与竖直向地震波三种加载工况下地铁地下车站结构的地震响应特性,对车站结构各构件进行动内力分析及变形分析,以及土-结构间的动土压力分析,特别分析了中柱的动内力、变形及加速度分析。（3）建立地铁地下车站接头结构三维数值模型,考虑上述三种加载工况下地铁地下车站接头结构的地震响应特性,对车站结构和区间隧道结构进行动内力及变形分析,以及土-结构间的动土压力分析。（4）分析不同方向下输入地震波对车站结构及车站接头结构的加速度响应,得出地下结构加速度响应规律。本文以软土地铁地下车站结构为研究对象,以汶川地震发生时绵竹市清平乡监测站获得的强震记录为地震输入波,分析不同方向的地震波对车站结构地震响应的特性,得出了一些有意义的结论,对进一步研究软土地铁地下结构的地震,特别是强震反应特性具有一定的参考价值;对于成都,重庆,或具有潜在强震的城市的地铁建设具有参考意义。更多还原

【Abstract】 With the rapid development of Chinese economy,the scale of underground subway construction is enlarged quickly;there are more than 30 cities constructing or planning to construct subway or light-rail.The subway also has the function to defense some surprise attacks,which shoulders the important social effect.It will bring large economic losses when it is destroyed.It is significant to study the seismic characteristic of subway which is built on the soft site.The main content in this dissertation include:（1）In this paper,a procedure ANSYS-FLAC^3Dis proposed to build the three -dimensional numerical model under earthquake of FLAC^3Dby using ANSYS.And then numerical simulation is done by FLAC^3D.（2）The strong earthquake record,the Qingping ware,which is recorded in Qingping town,Mianzhu city,when the Wenchuan earthquake occurred,is selected as the bedrock input ground motion.The response characteristics of the subway station is analyzed under three cases of input ground motion,that is,only input horizontal acceleration,only input vertical acceleration,and input both horizontal and vertical acceleration.The results include the dynamic interval force response and the deformation of the subway station structure,particular the dynamic interval force and the deformation of the centre column.（3）The subway station joint structure is established and response characteristics of the subway station is analyzed under the three cases.The results also include the dynamic interval force response and the deformation of the subway station structure and the joint structure.（4）The acceleration response of subway station structure and the joint structure from different direction acceleration is considered.And the studied results the acceleration response rule of the underground structure.In this dissertation,the underground structure in soft soil is selected as the object to study,and the Qingping ware is selected as the input ground motion.the studied results the rules of the seismic characteristic and the seismic response characteristics of underground structure form different direction acceleration.The results in this dissertation will direct the following research for the underground subway which is built on the soft site.Also the results will direct the subway construction in Chengdu city, Chongqing city or other cities in which strong earthquake is potential of occurring.更多还原