Numerical simulation for the seismic response of unsymmetrically loaded tunnel entrance

摘要：

The mechanics of the portal part of unsymmetrically loaded tunnel is different from that of common tunnel,so the dynamic response behaviors of them will be also different.This paper has simulated the seismic response of the portal part of Huangcaoping No.1 tunnel by using FLAC3D,and has discussed the earthquake response characteristic of surrounding rock and lining of the portal part from the aspects of the plastic zone,stress,displacement and acceleration.The findings indicate that the side against mountain is weak in earthquake-resistance of tunnel,so the strengthening measures should be done in this part.Based on the orderliness of acceleration of surrounding along the axial direction of the tunnel,the anti-seismic fortified length in tunnel outlet of Huangcaoping No.1 tunnel can be gotten as fifteen meters.

关键词： unsymmetrically loaded tunnel tunnel entrance FLAC3D seismic response

作者: Tianbin Li Liangxiao Xiong Zhenghui Hua Changbin Yang

作者单位: State Key Laboratory of Geohazard Prevention,Chengdu University of Technology,China State Key Laboratory of Geohazard Prevention,Chengdu University of Technology,China Department of Ge Sichuan Expressway Construction & Development Corporation,China Guangxi Electric Power Industry Investigation Design and Research Institute,China

会议类型: 国际会议

会议名称: The 3rd International Conference on Environmental and Engineering Geophysics(第三届环境与工程地球物理国际会议)

会议地点: 武汉

会议语种:英文

页码: 199-202

在线出版日期: 2008-06-15（万方平台首次上网日期，不代表论文的发表时间）