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现代隧道技术 2017, Vol. 54 Issue (3) :90-96    DOI:
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地震波斜入射下山岭隧道横向动力响应数值分析
(1兰州交通大学甘肃省道路桥梁与地下工程重点实验室, 兰州 730070; 2 兰州交通大学道桥工程灾害防治技术国家地方联合工程实验室, 兰州 730070; 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 上海市城市建设设计研究总院, 上海 200125)
Numerical Analysis of the Transverse Dynamic Response of Mountain Tunnels Subjected to an Oblique Incidence of Earthquake Waves
(1 Key Laboratory of Road & Bridges and Underground Engineering of Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070; 2 National and Provincial Joint Engineering Laboratory of Road & Bridge Disaster Prevention and Control, Lanzhou Jiaotong University, Lanzhou 730070; 3 Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031; 4 Shanghai Urban Construction Design & Research Institute, Shanghai 200125)
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摘要  近断层地震具有显著的方向性特征, 地震波斜入射引起的非一致激励对隧道结构具有不可忽视的影响。文章基于粘弹性边界的波动数值理论, 采用 ANSYS进行汶川卧龙波输入下某山岭隧道横向地震响应数值分析, 研究了地震波入射角度对衬砌动力响应的影响。计算结果表明: 地震波斜入射时, 衬砌结构的地震响应与垂直入射时有明显差异, 呈现竖向受力特征, 结构反应随着入射角度的增加而增大; 斜入射时, 隧道抗震的薄弱部位在拱顶、 拱腰和拱脚处。研究结果可为山岭隧道抗震设计提供参考。
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Abstract: The significant characteristic of a near-fault earthquake is its directivity effect, therefore, the influence of non-uniform excitation induced by an oblique incident earthquake on a tunnel structure should not be ignored.Based on the wave numerical simulation theory of a viscoelastic artificial boundary, a numerical analysis of the transverse seismic response of a mountain tunnel was carried out with the Wenchuan Wolong earthquake wave using ANSYS, and the influence of the incident angle on the lining dynamic response was studied. The results show that: the dynamic responses of the lining structures subjected to the oblique incidence of seismic waves are quite different from those subjected to the vertical incidence of seismic waves, and they present the characteristics of being vertical? ly loaded, with a structure response that increases with an increase of the incident angle; and in the case of oblique incidence, weak parts of the lining are at the crown, haunch and arch spring.
KeywordsMountain tunnel,   Oblique incidence of seismic vibration,   Viscous-elastic boundary,   Numerical simula? tion     
基金资助:基金项目: 国家自然科学基金项目(51378436); 甘肃省道路桥梁与地下工程重点实验室开放基金项目 (1200110206-2); 长江学者和创新团队发展计划滚动资助项目(IRT_15R29).
作者简介: 作者简介: 汪精河 (1987-), 男, 博士, 讲师, 主要从事隧道工程抗震研究工作, E-mail: jhw870219@163.com.
引用本文:   
.地震波斜入射下山岭隧道横向动力响应数值分析[J]  现代隧道技术, 2017,V54(3): 90-96
.Numerical Analysis of the Transverse Dynamic Response of Mountain Tunnels Subjected to an Oblique Incidence of Earthquake Waves[J]  , 2017,V54(3): 90-96
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