摘要
主要考虑了顺层岩体的横观各向同性本构关系,基于黏弹性边界的时域波动理论,以某顺层岩体中高铁隧道为工程背景,采用ANSYS进行了地震响应数值分析,研究了qP波入射时岩层倾角对隧道地震响应不对称性的影响.结果表明:隧道地震响应的不对称性随岩层倾角的变化不服从线性关系,其规律具有分段性;所有工况中,岩层倾角分段区间约为(0°,45°)和(45°,90°),地震响应在岩层倾角为0°或90°时左右严格对称,在倾角为45°时左右较为接近;各分段区间内地震响应的不对称性均随岩层倾角的增大而先增强后减弱.
The case of the transverse isotropic constitution of bedding rock mass was considered,based on the time-domain wave theory of viscous-spring artificial boundary,taking a high-speed railway tunnel in a bedding rock mass as the research object,the proposed method was used through ANSYS to study the influence of the dip angle of rock strata on the seismic response of the tunnels.The results showed that,the asymmetry of the seismic response of the tunnel did not obey the linear relationship with the change of the dip angle of the rock stratum,and the law was segmental.In all the working conditions of this paper,the interval of the dip angle was about(0°,45°)and(45°,90°),the seismic response was strictly left-right symmetrical when the dip angle was 0°or about 90°,and was not too different from left to right when the dip angle was about 45°.The asymmetry of seismic response in each section of the interval increased first and then decreased with the increase of the dip angle of the rock stratum.
作者
胡鸿运
周晓军
汪精河
陈韬
Hu Hong-yun;Zhou Xiao-jun;Wang Jing-he;Chen Tao(Key Laboratory of Transportation Tunnel Engineering with the Ministry of Education,School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;National and Provincial Joint Engineering Laboratory of Road&Bridge Disaster Prevention and Control,Key Laboratory of Road&Bridge and Underground Engineering of Gansu Province,Lanzhou Jiaotong University,Lanzhou 730070,China;National and Local Joint Engineering Laboratory of Comprehensive Intelligent Transportation,National Railway Train Diagram Research and Training Center,School of Transportation and Logistics,Southwest Jiaotong University,Chengdu,610031,China)
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2018年第4期461-466,471,共7页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金项目(51378436,61703351)
中央高校基本科研业务费专项资金项目(2682017CX022).
关键词
顺层岩体
隧道
地震响应
岩层倾角
不对称性
bedding rock mass
tunnel
seismic response
dip angle of rock stratum
asymmetry
