西北黄土地区地震作用下地铁车站动力响应分析  

Dynamic Response Analysis of a Subway Station Under Seismic Action in the Loess Area of Northwest China

作　　者：任永忠[1] 朱彦鹏[2,3] 

机构地区：[1]兰州工业学院土木工程学院,甘肃兰州730050 [2]兰州理工大学甘肃省土木工程防灾减灾重点实验室,甘肃兰州730050 [3]西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《地震工程学报》2017年第4期617-622,631,共7页China Earthquake Engineering Journal

基　　金：甘肃省青年科技研究基金项目(1606RJYA255);兰州工业学院青年科技创新项目(16K-010)

摘　　要：以甘肃兰州地铁一号线某地铁车站为工程背景,基于ADINA分析软件32CPU有限元显式计算平台,建立地基土与车站结构相互作用的非线性地震响应计算模型。数值分析在El-Centro、Kobe和兰州波的多遇地震条件下其车站及地基土的动力响应差异。结果表明:车站结构振型与周围地基土振型基本一致;车站底板、中板及顶板的加速度时程曲线形状基本相同;中柱和侧墙均随着埋深的增加其水平位移减小;车站周围的地表土体均发生了不同程度的沉降,其距车站7.5m范围的沉降尤为显著,致使周围建筑物会遭受到一定程度的损坏。Based on the explicit finite method of the ADINA software and the 32-CPU parallel computing cluster platform,a nonlinear seismic response calculation model of the interaction between the foundation soil and the station structure is established to study its nonlinear seismic response to the El-Centro,recorded Kobe ground motions,and the Lanzhou artificial waves under frequent seismic activity.Using the subway station of the subway line 1in Lanzhou as an example,the results indicate that the vibration mode of the subway structure is similar to the foundation soil and the shape of the acceleration versus time-history curves of the midpoint of the ceiling,middle,and bottom of the subway station are all basically similar.Also,as the buried depth increases,the horizontal displacement of the center pillar and side wall decreases;the surface ground around the subway station produces a different degree of settlement.The settlement away from the subway station in the 7.5-m range is particularly serious because it led to partial damage around the buildings.

关 键 词：西北黄土 地铁车站 动力响应 振型 地表沉降 

分 类 号：U231.4[交通运输工程—道路与铁道工程]