不同浅埋衬砌隧道压缩、剪切波作用下的动力响应  

DYNAMIC RESPONSE OF SHALLOW-BURIED TUNNEL WITH DIFFERENT LINING STRUCTURES UNDER COMPRESSION AND SHEAR WAVES

作　　者：曾祥会 李楠[2] 刘中宪[2,3] 吴朝阳 ZENG Xianghui;LI Nan;LIU Zhongxian;WU Zhaoyang(Tianjin Binhai New Area Rail Transportation Investment Development Co.,Ltd,Tianjin 300450,China;Tianjin Key Laboratory of Civil Buildings Protection and Reinforcement,Tianjin Chengjian University,Tianjin 300384,China;Tianjin Institution of Earthquake Engineering,Tianjin 300384,China)

机构地区：[1]天津滨海新区轨道交通投资发展有限公司,天津300450 [2]天津城建大学天津市土木建筑结构防护与加固重点实验室,天津300384 [3]天津市地震工程研究所,天津300384

出　　处：《工业建筑》2018年第8期98-102,117,共6页Industrial Construction

基　　金：国家自然科学基金项目(51678390);国家重点基础研究发展计划(2015CB058002);天津市科技支撑计划重点项目(17YFZCSF01140)

摘　　要：采用间接边界元法,对平面压缩波和剪切波入射下浅埋马蹄形隧道对弹性波的散射进行分析。研究表明：随着入射波频率的增大,马蹄形衬砌隧道正上方一定距离处地表位移表现出放大效应,但放大幅度略小于圆形隧道情况;垂直偏振横波倾斜入射,迎波面的地表位移幅值曲线振荡更剧烈;入射波频率较低时,衬砌应力集中现象最为显著,马蹄形衬砌上半拱左、右两侧与竖向夹角约为45°处和拱脚处易发生应力集中;衬砌隧道内壁的环向应力要明显大于衬砌外壁的环向应力。总体上看,马蹄形隧道动应力放大效应要小于相应的圆形隧道。随着入射波频率的增大,马蹄形衬砌应力空间分布更为复杂,应力集中的区域多于圆形。The indirect boundary element method（IBEM） was used to solve the overall seismic response of a shallowburied tunnel with horseshoe-shaped lining under plane elastic wave. The results showed that with the increase of elastic wave frequency,the displacement of the ground surface at a certain area above the horseshoe-shaped lining tunnel exhibited the amplification effect,but the amplitudes were slightly smaller than that of the circular lining tunnel. Under oblique incidence of vertically polarized SV wave,the displacement amplitude of the earth＇s surface at wave surface was more intense. When the frequency of incidence wave was lower,the stress concentration of lining was most obvious,the areas were at the left and right upper arch of horseshoe-shaped lining,which were of about 45° with the vertical plane,and the arch foot; the stress concentration was more significant; the dynamic stress concentration factor（DSCF） of the inner wall of the tunnel was obviously larger than the outer. On the whole,the dynamic stress amplification effect of the horseshoe-shaped tunnel was less than that of the corresponding circular lining tunnel. With the increase of elactic incidence wave frequency,the spatial distribution of the horseshoe-shaped lining was more complex,and the stress concentration area of horseshoe-shaped lining tunnel was more than that of the circular one.

关 键 词：马蹄形衬砌隧道 间接边界元法 剪切波 压缩波 弹性波散射 动应力集中因子 

分 类 号：U451[建筑科学—桥梁与隧道工程]