摘要
隧道的存在会导致场地土层以及地表结构的地震动力响应发生变化,为研究这种影响,建立了隧道-土体-地表结构相互作用体系的平面应变计算模型,同时考虑了隧道半径以及刚度变化的影响。根据模拟结果可得:由于隧道的存在,地表一定范围内的地震加速度发生显著变化;隧道半径的变化对地表加速度、地表结构地震响应的影响显著,半径越大的隧道对于地震波的阻隔作用越为明显。研究结果表明隧道对场地加速度及地表结构的影响不容忽视。
The existence of the tunnel will greatly affect the seismic response of site and ground structure which are adjacent to the tunnel. In order to study this effect, the plane strain model of the tunnel-soil interaction system is established. The simulation results showed that due to the presence of the tunnel, the earthquake ground acceleration within a certain range changes significantly;The change of tunnel radius has significant effects on the site acceleration and ground structure seismic response. The larger radius tunnel can barrier seismic wave more obviously. The results show that tunnel has a great effect on the site and adjacent ground structure.
作者
杨蒙
林永亮
李新星
YANG Meng;LIN Yongliang;LI Xinxing(Department of Civil Engineering,Shanghai University, Shanghai 200072 , China;Shanghai Tunnel Engineering and Rail Transit Design & Research Institute .Technology R & D Center, Shanghai 200235 , China)
出处
《结构工程师》
北大核心
2019年第1期140-145,共6页
Structural Engineers
基金
上海市城乡建设和交通委员会科研项目(建管2012-009-004)
关键词
隧道
地表结构
地震响应
场地加速度
隧道-土体相互作用
tunnel
ground structure
seismic response
site acceleration
tunnel-soil interaction system
