强震区隧道洞口段振动台模型试验研究  

Shaking table test for the portal section of a tunnel in high-intensity seismic region

作　　者：朱长安[1] 高波[1] 索然绪[2] 

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]西安公路研究所,西安710054

出　　处：《现代隧道技术》2008年第1期48-52,62,共6页Modern Tunnelling Technology

摘　　要：为了研究强震区隧道洞口段的抗震性能,对隧道结构进行了振动台模型试验。文章首先介绍了试验方案设计;接着对试验中测得的隧道结构的加速度反应和应变反应进行了分析,得出洞口段在地震动作用下的横截面的应变分布规律,以及沿纵向的加速度反应特征;最后,对试验中的地震裂缝和衬砌结构的破坏等震害现象进行了描述。A shaking table test was performed to study the dynamic behavior of the portal section of a tunnel in high-intensity seismic zone. The test scheme is introduced first. Then the acceleration responses and strain responses of tunnel structure are analyzed with the responses obtained from the test. Thereupon, the distribution rules of strains in transverse section and the seismic acceleration responses of the portal section are acquired. At last, the seismic damage phenomena of earthquake cracks on ground surface and the rupture characteristics of lining are described.

关 键 词：强震区 隧道洞口段 振动台试验 

分 类 号：U453.1[建筑科学—桥梁与隧道工程] U452.2[交通运输工程—道路与铁道工程]