地震波斜入射下浅埋偏压隧道动力响应数值分析-兰州大学.PDF

兰州大学学报: 自然科学版, 2016, 52(4) / 8 月 Journal of Lanzhou University ：Natural Sciences，2016 ，52(4) / August 地震波斜入射下浅埋偏压隧道动力响应数值分析 1 1 1 2 汪精河, 周晓军 , 刘建国 , 王晓波 1. 西南交通大学 土木工程学院, 交通隧道工程教育部重点实验室, 成都 610031 2. 上海市城市建设设计研究总院, 上海 200125 摘 要：基于粘弹性边界的时域波动理论, 建立了二维平面SV 波斜入射的输入方法. 以成兰铁路某 山岭隧道浅埋偏压段为研究对象, 采用ANSYS 研究了地震波入射角度对浅埋偏压隧道地震反应的 影响. 结果表明: 地震波斜入射时, 隧道结构的地震响应与垂直入射有明显差异, 结构反应随着入射 角度的增加而增大, 斜入射对隧道竖向地震响应影响更为显著. 入射角度对衬砌弯矩峰值包络图影 响较大, 对轴力峰值包络图影响很小. 斜入射时, 拱顶、仰拱和拱腰的弯矩增加较多, 是隧道衬砌抗震 的薄弱部位. 关键词：浅埋偏压隧道; 地震波斜入射; 粘弹性边界; 数值模拟 中图分类号：U25 文献标识码：A 文章编号: 0455-2059(2016)04-0455-06 DOI: 10.13885/j.issn.0455-2059.2016.04.005 Numerical analysis of the dynamic response of a shallow-buried unsymmetrical-loading tunnel subjected to an oblique incidence of earthquake wave 1 1 1 2 Wang Jing-he , Zhou Xiao-jun , Liu Jian-guo , Wang Xiao-bo 1. Key Laboratory of Transportation Tunnel Engineering with the Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China 2. Shanghai Urban Construction Design Research Institute, Shanghai 200125, China Abstract: Based on the time-domain wave theory of viscous-spring artificial boundary, a 2D input method for an oblique incidence of plane SV wave was proposed. Taking a shallow-buried unsymmetrical-loading moun- tain tunnel in Cheng-Lan Railway as the research object, the proposed method was used through ANSYS to study the influence of the incident angle on the seismic response of shallow-buried unsymmetrical-loading tun- nels. The results showed that the dynamic responses of the tunnel subjected to an oblique incidence of seismic wave were clearly