摘要
本文以成都某地铁深基坑邻近高层住宅楼为研究对象,利用MIDAS GTS数值模拟软件进行时程分析,重点研究地震作用下地铁深基坑对邻近建筑地震响应的影响。结果表明:深基坑对周边场地及邻近建筑的地震响应影响显著,地震作用时邻近建筑位移明显增加,使邻近建筑所受地震作用增大;基坑开挖后削弱了地层的整体性和稳定性,形成相对临空面,基坑两侧地层及邻近建筑震动位移均倾向基坑;在基坑未失稳情况下,邻近建筑层间位移仍有较大幅度增加;邻近建筑使基坑所受地震作用有所增大。
This thesis tends to study the high building adjacent to a deep excavation of metro tunnel by using MIDAS GTS numerical simulation software to take a time-history analysis.It mainly focuses on the influence of the deep excavation on the seismic response of the adjacent buildings.It turns out that the deep excavation has noticeable influence on seismic response of the surrounding sites and buildings.And the displacement of adjacent buildings is significantly increasing under earthquakes,which makes the influence of earthquakes grow on the buildings.The excavation decreases the integrality and stability of stratum,and forms relative free face.The seismic displacement of the stratum and the adjacent buildings happens to the side of the excavation.The inter-story displacement of the adjacent buildings is still remarkably increasing under the circumstance of stable excavation.At the same time,the adjacent buildings also increase the influence of earthquakes on the deep excavation.
作者
赵文强
ZHAO Wenqiang(Qingdao Metro Planning and Design Institute Co.Ltd.,Qingdao Shandong 266300,China)
出处
《铁道建筑技术》
2021年第6期64-67,104,共5页
Railway Construction Technology
关键词
地铁深基坑
邻近建筑
地震作用
时程分析
地震响应
metro deep excavation
adjacent building
influence of earthquake
time-history analysis
seismic response
