饱和场地中异跨地铁车站地震响应特性分析
Analysis of Seismic Response of an Unequal-span Metro Station in Saturated Sites
苏健 1肖威 1许民泽 2崔春义 2赵经彤2
作者信息
- 1. 大连海洋大学 海洋与土木工程学院,辽宁 大连 116023
- 2. 大连海事大学 土木工程系,辽宁 大连 116026
- 折叠
摘要
为研究饱和场地中异跨地铁车站结构体系地震动力响应特性问题,以某异跨地铁车站为研究对象,基于有限元分析软件MIDAS-GTS(Midas Geotechnical and Tunnel analysis System)建立异跨地铁地下车站结构体系三维有限元数值模型,选取弹性模量、黏聚力、泊松比、摩擦角作为敏感性影响参数,采用正交试验方法和饱和两相介质动力分析方法进行参数敏感性分析.研究结论表明:剪力墙和悬挑跨附近易发生受弯破坏,中柱易发生受剪破坏;在单一横向地震动作用下或者水平与竖向地震动共同作用下,弹性模量影响最大,泊松比和摩擦角的敏感性次之,黏聚力影响最小.此动力响应特性分析流程方法可为异跨地铁车站抗震设计提供参考.
Abstract
The seismic response characteristics of an unequal-span subway station structure system in saturated site are studied.A three-dimensional finite element numerical model of this structure system is established based on the finite element analysis software MIDAS-GTS.The elastic modulus,cohesion,Poisson's ratio and friction angle are selected as the sensitivity influence parameters.The saturated two-phase medium dynamic analysis method and the orthogonal test method are used for parameter sensitivity analysis to obtain the range of the corresponding seismic response.The research results show that the shear wall and overhang span are prone to yield bending damage,while the central columns are prone to yield shear damage;Under the action of a horizontal ground motion or the combination action of the horizontal and vertical ground motions,the influence of elastic modulus is the largest,the sensitivity of Poisson's ratio and friction angle is the second,and the influence of cohesion is the smallest.This procedure of seismic response characteristics analysis for the unequal-span subway station structure system may provide a reference for the seismic design of unequal-span subway station structures.
关键词
振动与波/饱和场地/异跨地铁车站/正交试验法/地震动力响应/参数敏感性Key words
vibration and wave/saturated site/unequal-span subway station/orthogonal test method/seismic response/parameter sensitivity引用本文复制引用
基金项目
国家自然科学基金面上项目(51578100)
中央高校基本科研业务费专项(3132019349)
辽宁省教育厅科研项目(LJKZ0717)
出版年
2024
国家科技期刊平台
NSTL
万方数据