摘要
现实中衬砌隧道穿越沉积谷地十分常见,而国内外对其地震响应规律研究较少。基于MATLAB编程平台,采用间接边界积分方程法,就沉积谷地衬砌隧道对平面SH波的散射问题进行了初步探讨。研究了不同频率、隧道埋深与入射角度对地表位移和衬砌内外壁动应力集中因子的影响,并比较了沉积谷地中隧道与半空间隧道两种情况下的差别。结果表明:软土沉积中隧道衬砌动应力集中更为显著;高频波入射下,隧道埋深对沉积区域内位移分布、衬砌应力频谱特性和地表位移频谱特性均有较大影响。研究结论可为沉积谷地中衬砌隧道抗震设计与安全性评估提供定量依据。
Although lined tunnels usually pass through the alluvial valley; the study of their seismic responses is limited. The SH-plane wave scattering induced by an elastic-half-space lined tunnel in alluvial valley is studied with MATLAB program and the indirect-integral boundary element method. The influences of frequency, tunnel depth and incident angle are investigated on the surface displacement and the dynamic stress concentration factor of the internal and surface displacements of alluvial valley. The difference between tunnel and semi-space tunnel in alluvial valley is compared. The results show that the dynamic stress concentration of lined tunnel in alluvial soft clay is significant, and due to the high frequency incident waves, the effect of tunnel depth in alluvial area on the displacement distribution and lined stress spectrum as well as surface displacement is also significant.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2016年第9期2687-2695,2705,共10页
Rock and Soil Mechanics
基金
天津市应用基础与前沿技术研究计划项目(No.14JCYBJC21900)
国家自然科学基金项目(No.51278327)
天津市应用基础与前沿技术研究计划重点项目(No.13JCZDJC35500)~~
关键词
弹性半空间
沉积谷
衬砌隧道
平面SH波
间接边界积分方程法
elastic half-space
alluvial valley
lined tunnel
SH-plane wave
indirect-integral boundary equation method（IBIEM）
作者简介
赵瑞斌，男，1964年生，教授，博士，主要从事地震工程、岩土工程领域的研究工作。E-mail：zhao．rb@263．net
通讯作者：刘中宪，男，1982年生，副教授，博士，主要从事地震工程、工程波动领域的研究工作。E-mail：zhongxian1212@163．net
