高烈度地震区隧道洞口段刚柔相济抗减震模型试验研究  

Shock absorber with rigid-flexible combination model tests for tunnel opening section in high intensity seismic areas

作　　者：崔光耀 纪磊 王明年[2,3] 朱长安 CUI Guangyao;JI Lei;WANG Mingnian;ZHU Chang’an(School of Civil Engineering,North China University of Technology,Beijing 100144,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;MOE Key Lab of Transportation Tunnel Engineering,Southwest Jiaotong University,Chengdu 610031,China;Highway Planning,Survey,Design and Research Institute,Sichuan Provincial Transportation Department,Chengdu 610041,China)

机构地区：[1]北方工业大学土木工程学院,北京100144 [2]西南交通大学土木工程学院,成都610031 [3]西南交通大学交通隧道工程教育部重点实验室,成都610031 [4]四川省交通运输厅公路规划勘察设计研究院,成都610041

出　　处：《振动与冲击》2019年第5期92-97,115,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金(51408008; 51478277);北京市青年拔尖人才培育计划项目(1759-004);四川省应用基础研究计划项目(2014JY0090; 2015JY0166);四川省交通科技项目(2013A1-5)

摘　　要：为研究高烈度地震区隧道洞口段刚柔相济抗减震技术,依托白云顶隧道进口段,开展了大型振动台模型试验,通过对试验数据的分析,主要研究了地震动峰值加速度、纵向应变、接触应力及结构内力。试验结果表明:仅采取结构加强措施,隧道洞口段全段结构安全系数最小值增长百分比在30%～65%;仅施设减震缝,隧道洞口段全段结构安全系数最小值增长百分比在40%～55%,减震缝在消减强制位移方面有明显作用,减震效果明显;采取刚柔相济抗减震措施,隧道洞口段全段结构安全系数最小值增长百分比在85%～145%,其在抵抗地震震动、消减强制位移方面作用显著,减震效果最佳。研究成果可为高烈度地震区交通隧道抗震性能的提高提供借鉴。In order to study shock absorber technology with rigid-flexible combination for tunnel opening section in high intensity seismic areas,taking the entrance section of Bai-yunding tunnel as a background,large-scale shaking table model tests were conducted to study peak acceleration of ground motion,longitudinal strain,contact stress and structural internal forces through analysing test data.The test results showed that only taking structural strengthening measures,the growth percentage of structure safety factor minimum value of the whole tunnel opening section is between 30%-65%;only setting a shock absorption gap,that is between 40%-55%;the shock absorption gap has an obvious action to reduce forced displacements,and its shock absorption effect is obvious;taking the shock absorber technology with rigid-flexible combination,the growth percentage of structure safety factor minimum value of the whole tunnel opening section is between 85%-145% and its action is remarkable to resist earthquake motion and reduce forced displacements,the shock absorption effect is the best.The study results provided a reference for improving the aseismic performance of transportation tunnels in high intensity seismic areas.

关 键 词：隧道工程 高烈度地震区 洞口段 刚柔相济 抗减震 模型试验 

分 类 号：U45[建筑科学—桥梁与隧道工程] TU47[交通运输工程—道路与铁道工程]