浅埋圆形复合式衬砌隧道动应力响应研究  

Dynamic Response Study on Shallow Circular Composite-Lining Tunnels

作　　者：高波[1] 王帅帅[1] 

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,四川成都610031

出　　处：《西南交通大学学报》2016年第4期599-606,共8页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金资助项目(51178398)

摘　　要：为了分析浅埋复合式衬砌隧道动力响应特性,基于Fourier-Besselh级数展开法,给出了半无限空间内平面SV波入射下浅埋圆形复合式衬砌隧道动应力集中系数级数解析解,分析了SV波入射角和入射频率参数对衬砌动应力集中系数的影响,研究表明:在SV波入射下,双层衬砌隧道二次衬砌的动应力集中系数幅值大于初衬值;在隧道外部敷设减震层后,由于减震层剪切刚度较低,隧道动应力特性发生明显改变,当低频入射频率参数为0.25,入射波垂直入射时,设减震层可以降低衬砌动应力集中系数20%;SV波入射角度和入射频率参数对衬砌动应力集中系数有显著影响,随着入射角和入射频率参数增大,衬砌动应力系数幅值和分布越来越复杂.To investigate the dynamic response of shallow buried composite-lining tunnels, series solution of the dynamic stress concentration factor of double linings cylindrical cavities in an half elastic space were presented using the Fourier-Besselh method, as cavities were subjected to incident plane SV waves. The influence of the incident angle and frequency parameter on the dynamic stress concentration factor was discussed, then some conclusions were generated. The maximum dynamic stress concentration factor of the second lining is greater than that of the first lining in double linings tunnels. The dynamic stress concentration factor of the tunnel covered with buffer layers outside changes obviously, when the angle of incident SV waves is 0° and the frequency parameter is 0.25, the dynamic stress concentration factor of linings decreases by 20%. The incident angle and frequency parameter of plane SV waves have a significant influence on the dynamic stress concentration factor, with lager incident angle and frequency parameter, the values and distribution of dynamic stress factor become more complex.

关 键 词：SV波 圆形洞室 双层衬砌 减震层 动应力集中系数 

分 类 号：TU473[建筑科学—结构工程]