黄土边坡-隧道结构地震动反应谱特性研究  

Seismic Response Spectrum of Loess Slope-Tunnel Structure

作　　者：鲁得文[1] 梁庆国[2,3] 熊玉莲 LU Dewen;LIANG Qingguo;XIONG Yulian(Yangling Vocational and Technical College,Yangling 712100,Shaanxi China;National Demonstration Center for Experimental Civil Engineering Education,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]杨凌职业技术学院,陕西杨凌712100 [2]土木工程国家级实验教学示范中心(兰州交通大学),兰州730070 [3]兰州交通大学土木工程学院,兰州730070

出　　处：《河南科学》2020年第11期1847-1852,共6页Henan Science

基　　金：国家自然科学基金项目(41562013,51968041);杨凌职业技术学院自然科学研究基金项目(A2018023)。

摘　　要：利用地震波处理软件SeismoSignal对大型振动台模型试验坡面处监测点数据进行处理,研究边坡-隧道结构在不同地震动输入下的加速度反应谱特性.结果表明:①地震动输入对加速度反应谱和规准反应谱影响显著,随着周期的增大反应谱值先增大后减小,最后趋近于零;②规准反应谱在地震动输入较小时,最大值随地震动输入的增大而减小,随坡高的增大而增大,在坡顶时达到最大值,隧道的存在对边坡的抗震性能有一定影响,尤其在隧道洞口段是抗震的薄弱环节;③平均规准反应谱在短周期段随地震动的增大而减小,在中长周期段随地震动的增大而增大,峰值随地震动的增大呈现出向中长周期段推移的趋势,平均曲线峰值两侧的数据呈现出较好的数学关系,左端拟合曲线为二次多项式关系式,右端拟合曲线为指数关系式.The seismic wave processing software SeismoSignal is used to process the data of the monitoring points on the slope of the large-scale shaking table model test,and the characteristics of the acceleration response spectrum of the slope-tunnel structure under different ground motion inputs are studied.The test results indicated:①The ground motion input has a significant effect on the acceleration response spectrum and the normalized response spectrum.As the period increases,the response spectrum value increases first and then decreases,and finally approaches zero.②When the ground motion input is small,the maximum value of normalized response spectrum decreases with the increase of the ground motion input,and increases with the increase of the slope height,and reaches the maximum value at the top of the slope.The existence of the tunnel has a certain impact on the seismic performance of the slope,especially in the tunnel portal section is the weak link of seismic resistance.③The average normalized response spectrum decreases with the increase of ground motion in the short period,increases with the increase of ground motion in the medium and long period,and the peak value tends to move towards the medium and long period with the increase of ground motion.The data on both sides of the peak value of the average curve shows a good mathematical relationship.The fitting curve at the left end is a quadratic polynomial relationship,and the fitting curve at the right end is an exponential relationship.

关 键 词：加速度反应谱 规准反应谱 地震动输入 拟合曲线 

分 类 号：TU43[建筑科学—岩土工程]