摘要
采用间接边界积分方程法(IBIEM),对压缩波(P波)入射下弹性半空间中直墙拱形隧道的地震响应进行分析。通过参数分析,讨论入射波特性和衬砌特性对平面波散射的影响规律。计算结果表明:直墙拱形衬砌洞室附近波的散射同圆形衬砌情况相比差异显著;动力反应特征主要依赖于波入射角、入射波频率、衬砌埋深和厚度等参数;P波入射下洞室附近地面运动放大效应十分明显;低频波入射下,直墙拱形衬砌底板处的动应力集中现象最为显著。
The seismic response analysis of a straight-wall-top-arch tunnel in elastic half-space under incident plane P waves was carried out by an indirect boundary integration equation method（ IBIEM）. Through parametric analysis,the effect of the incident waves and the lining on the scattering of the plane waves was discussed. It was shown that there was an obvious difference between the wave scattering around the lined tunnel and that of the circular tunnel.The dynamic response mainly depended on the incident angle,incident frequency and the embedment depth and thickness of the tunnel,etc. There was a significant amplification effect on the surface movement near the tunnel under incident plane P waves. Significant dynamic stress concentration was also observed on the bottom of the straight-wall-top-arch tunnel under incident wave of low frequency.
出处
《工业建筑》
CSCD
北大核心
2016年第3期96-101,共6页
Industrial Construction
基金
天津市应用基础研究与前沿研究计划项目(14JCYBJC21900)
国家自然科学基金项目(51278327)
滨海土木工程结构与安全教育部重点实验室项目(2014-01)
