摘要
采用高精度间接边界元方法(IBEM)考察地震波入射下隧道-邻近建筑物二维地震动力相互作用的规律。结果表明:建筑物与邻近隧道存在着明显的相互作用,整体动力反应规律取决于隧道,建筑物之间的空间位置关系、隧道埋深、入射波的频率和角度等因素。隧道位于建筑物正下方时,刚性衬砌隧道(相对围岩)对上部结构主要表现为隔震效应;隧道位于建筑物两侧时,隧道对建筑顶部位移有明显放大效应,最大可放大约40%。同时隧道应力也明显增大,最大可放大约43%。因此实际中需根据隧道-建筑物的空间位置关系,适当调整衬砌隧道与沿线建筑物的抗震设防水平。
A high-precision indirect boundary element method(IBEM)is adopted to investigate the seismic response characteristics and the interaction laws between a tunnel and its adjacent buildings under seismic wave incidence.The results show that there is a distinct interaction between the buildings and the adjacent subway tunnel.The whole dynamic response depends on the spatial location of tunnels and buildings,the buried depth of tunnel,the frequency and the angle of incident wave,etc.The isolation effect is obvious when the rigid lined tunnel is just below the building.The displacement at the ground surface and the top of the building amplifies obviously when the tunnel is located on either side of the building,and the maximum amplification can reach 40%.Moreover,the stress in the tunnel lining also amplifies when the tunnel is located at either side of the building,and the maximum amplification is about 43%.In practice,it is necessary to adjust the seismic fortification levels of lined tunnels and the buildings along the tunnels according to their spatial location.
作者
刘中宪
符瞻远
赵延喜
孙帅杰
LIU Zhongxian;FU Zhanyuan;ZHAO Yanxi;SUN Shuaijie(Tianjin Key Laboratory of Civil Structure Protection and Reinforcing,Tianjin Chengjian University,Tianjin 300384,China;Nanjing Institute of Architectural Engineering,Nanjing 211167,China)
出处
《防灾减灾工程学报》
CSCD
北大核心
2019年第6期980-989,共10页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家自然科学基金项目(51678390)
天津市自然科学基金重点项目(18ZXAQSF00110)
天津市科技支撑计划项目(17YFZCSF01140)资助
关键词
间接边界元
衬砌隧道
SV波
平面波散射
动应力集中
indirect boundary element method
lined tunnel
building
SV waves
scattering of plane waves
dynamic stress
