地铁车站与横跨桥梁耦联破坏数值模拟  

Numerical simulation of coupling failure between subway station and cross bridge

作　　者：董瑞 景立平[1,2,3] 单振东 李亚东[4] Dong Rui;Jing Liping;Shan Zhendong;Li Yadong(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China;Key Laboratory of Earthquake Disaster Mitigation,Ministry of Emergency Management,Harbin 150080,China;Institute of Disaster Prevention,Hebei Langfang 065201,China;Earthquake Engineering Research&Testing Center,Guangzhou University,Guangzhou 510405,China)

机构地区：[1]中国地震局工程力学研究所地震工程与工程振动重点实验室,哈尔滨150080 [2]地震灾害防治应急管理部重点实验室,哈尔滨150080 [3]防灾科技学院,河北廊坊065201 [4]广州大学工程抗震研究中心,广州510405

出　　处：《地震学报》2022年第1期50-59,共10页Acta Seismologica Sinica

基　　金：中国地震局地震工程与工程振动重点实验室开放研究专项(2018D16);国家重点研发计划(2018YFC1504004)和国家重点研发计划课题(2016YFC0800205)共同资助。

摘　　要：以典型的两层三跨形式地铁车站为研究对象,采用非线性动力时程反应分析方法,对软土场地的地铁车站与上部交叉桥梁模型进行数值模拟分析,给出了一种潜在的地铁车站-桥梁耦联破坏模式,分析了地铁车站与上部桥梁的地震动力相互作用.数值模拟结果表明:桥梁对车站的地震响应影响较小,车站发生破坏主要取决于地震作用及其本身的强度;地铁车站发生破坏后会引起邻近区域土层产生较大的水平和竖向变形,进而会引起邻近区域地基失效并使桥梁发生落梁破坏;地铁车站遭地震破坏后,桥梁基础带动邻近区域的土层整体向车站方向移动,加剧车站坍塌震害.In this paper,a typical two-story and three-span subway station is taken as the research object. The nonlinear dynamic time-history analysis method is adopted to conduct numerical simulation analysis on the model of the subway station and the upper bridge on soft site. A potential coupling failure mode of subway station and bridge is presented. The seismic interaction between the subway station and the upper bridge is studied. Numerical simulation results show that:the bridge has a little effect on the seismic response of the station,and the damage of the station mainly depends on the earthquake action and structure strength;the destruction of the subway station will cause a large horizontal and vertical deformation of the soil in adjacent areas,resulting in the bridge beam fall;after the destruction of the station,the bridge foundation makes the soil move towards the station,which aggravates the earthquake damage of subway station.

关 键 词：结构-土-结构相互作用 有限单元法 地震反应分析 耦联破坏 

分 类 号：P315.9[天文地球—地震学]