基于Pushover方法的漫滩软土区地铁车站抗震分析  

Pushover Method Based Seismic Analysis for Subway Station Built in the Floodplain Soft Soil Area

作　　者：姚任行 涂智溢 王仰君 蒋家卫 吴琪[3] 张江伟 Yao Renxing;Tu Zhiyi;Wang Yangjun;Jiang Jiawei;Wu Qi;Zhang Jiangwei(Ningbo Rail Transportation Group Co.,Ltd.,Ningbo 315101,Zhejiang,China;Zhejiang Institute of Communications Co.,Ltd.,Ningbo 315101,Zhejiang,China;Institute of Geotechnical Engineering,Nanjing Tech University,Nanjing 210009,China;School of Urban and Geological Engineering,Hebei GEO University,Shijiazhuang 050031,China)

机构地区：[1]宁波市轨道交通集团有限公司建设分公司,浙江宁波315100 [2]浙江数智交院科技股份有限公司,浙江宁波315100 [3]南京工业大学,岩土工程研究所,南京210009 [4]河北地质大学,城市地质与工程学院,石家庄050031

出　　处：《震灾防御技术》2023年第3期614-619,共6页Technology for Earthquake Disaster Prevention

基　　金：国家自然科学基金(52008206);河北省自然科学基金(E2019403153)。

摘　　要：为研究地下结构Pushover分析方法在不同条件下的适用性,基于有限元软件平台,建立长江漫滩区地铁车站土-结构二维有限元分析模型,分别采用非线性动力时程分析方法与地下结构Pushover分析方法对5种不同土体刚度模型进行抗震分析。峰值层间位移角与峰值内力的分析结果表明,当土体刚度与结构刚度一致时,地下结构Pushover分析方法计算结果与非线性动力时程分析方法计算结果相近,而当土体刚度小于结构刚度或土体刚度大于结构刚度时,Pushover分析方法计算精度下降。This paper is to study the applicability of the underground structure pushover analysis method under different conditions.Based on the finite element software platform,the soil-structure two-dimensional finite element analysis model based on the cross section of the subway station located in Yangtze River floodplain aera was established.The nonlinear dynamic time history analysis method and the pushover analysis method are respectively used for seismic analysis of five models with different soil stiffness.The analysis results based on the peak inter-layer displacement angle and the peak internal force show that,when the soil stiffness is consistent with the structural stiffness,the calculation results of the pushover analysis method are very close to the results of the nonlinear dynamic time history analysis method.However,when the soil stiffness is less than the structural stiffness or when the soil stiffness is greater than the structural stiffness,the calculation accuracy of the pushover analysis method will decrease significantly.

关 键 词：地下结构 PUSHOVER分析方法 土体刚度 抗震分析 长江漫滩区 

分 类 号：U231.4[交通运输工程—道路与铁道工程] TU93[建筑科学—结构工程] TU352.11