层状场地中地铁隧道对邻近建筑物地震反应的影响  

Effect of tunnels on earthquake response of ground and buildings along the subway in layered site

作　　者：傅玉勇[1] 闫澍旺[1] 胡子学 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津华厦建筑设计有限公司,天津301600

出　　处：《建筑结构》2009年第11期46-49,共4页Building Structure

摘　　要：采用动力有限单元法建立层状场地中地铁隧道和邻近建筑物整体地震反应计算模型。结合粘弹性人工边界,利用大质量法输入地震波,实现了该半无限域内波动问题的准确求解。通过详细的参数分析,研究地铁隧道埋深、建筑物和隧道间距等因素对建筑物地震反应的影响特征。研究表明:软土层中地铁隧道对附近建筑物地震反应具有显著的影响,地铁的存在使得附近建筑物顶层水平位移反应峰值放大了近30%。而竖向地震输入下,地铁对建筑物的影响相对较弱。实际地铁沿线附近建筑物需适当提高地震动输入水平。The whole model of earthquake response of the subway and nearly buildings was established using dynamic FEM. The viscous-spring artificial boundary which is important for the wave motion problem in seml-infinite domain is employed to calculate the effect of the depth, the distance of the tunnel and the soil layer prosperities more accurately. By the detailed parameter study, it is shown that the tunnels in soft soil have significant influence to the nearby buildings, and the displacement in the top of the building can be amplified up to 30% . The vertical earthquake response of the building seems to be less influenced relatively by the tunnels. It is suggested that the earthquake input of those buildings along the subway should be properly improved.

关 键 词：层状场地 地铁隧道 地震反应 有限单元法 粘弹性边界 地铁沿线建筑物 

分 类 号：TU753.1[建筑科学—建筑技术科学] U459.1[建筑科学—桥梁与隧道工程]