浅埋矩形框架地铁车站结构抗震性能指标标定研究  

Study on quantification of seismic performance index for rectangular frame subway station structure

作　　者：杜修力[1] 蒋家卫 许紫刚 许成顺[1] 刘思奇 Du Xiuli;Jiang Jiawei;Xu Zigang;Xu Chengshun;Liu Siqi(Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education, Beijing University of Technology, Beijing 100124, China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室

出　　处：《土木工程学报》2019年第10期111-119,128,共10页China Civil Engineering Journal

基　　金：国家重点研发计划项目课题(2018YFC1504305);国家自然科学基金创新研究群体项目(51421005)

摘　　要：针对目前地下结构抗震性能水准定义与性能指标标定研究的不足,文章参考地面建筑性能水准的划分方法,将地下结构的抗震性能水准划分为四个水平,并对每一水平条件下结构具备的功能性作了简略描述。在此基础上,选取 18 座不同断面类型的浅埋矩形框架地铁车站,建立土-结构三维整体分析有限元模型。采用倒三角分布荷载的地下结构 Pushover 分析方法进行分析,获得各个车站结构关键构件的完整能力曲线。通过几何作图法和概率统计方法建立以层间位移角为限值的矩形框架地铁车站结构横向抗震性能指标体系。该性能指标量化标准可在一定程度上指导地下结构抗震设计,并为进一步发展和完善现有地下结构抗震性能指标体系研究提供参考。In view of the insufficiency in the definition of seismic performance level and quantification of performance index for underground structures. This paper divides the seismic performance level of underground structures into four levels, referring to the classification method for performance level of ground buildings, and gives a brief description of the structure functions for each level. Based on the classification, 18 shallow-buried subway stations different types of rectangular sections are selected as analysis objects, and a three-dimensional finite element model of soil-structure is established for them. The model is analyzed by the Pushover method analysis of underground structure with inverted triangular load distribution, and the complete capacity curves of key components of each station structure are obtained. By means of geometric mapping and probability statistics, the lateral seismic performance index system, including the limit value of inter-storey drift, is established for the rectangular frame subway station structure. The quantitative standard of performance index can guide the seismic design of underground structures to a certain extent, and provide reference for further development and improvement of the existing seismic performance index system of underground structures.

关 键 词：地铁车站结构 浅埋矩形框架 抗震性能指标 

分 类 号：TU93[建筑科学—结构工程]