New methods of safety evaluation for the rock/soil mass surrounding tunnel under earthquake

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	New methods of safety evaluation for the rock/soil mass surrounding tunnel under earthquake
	Cheng, Xuansheng1,2 ; Zheng, Yingren 3; Tian, Ruirui 1; Du, Xiuli 2
	2012
会议名称	12th International Symposium on Structural Engineering, ISSE 2012
会议录名称	Proceedings of the 12th International Symposium on Structural Engineering, ISSE 2012
页码	1247-1256
会议日期	November 17, 2012 - November 19, 2012
会议地点	Wuhan, China
出版者	Science Press
摘要	In order to obtain the seismic safety coefficient and fracture surface and to proceed the seismic safety evaluation for the rock mass and soil mass surrounding tunnel, in this paper, the limitation of evaluating seismic stability is considered, and the pseudo-static strength reduction is used. By the finite element software ANSYS and the strength reduction, the new methods of seismic safety evaluation for the rock mass and soil mass surrounding tunnel are put forward, just as the dynamic FEM static strength reduction and the dynamic FEM strength reduction. In order to prove the feasibility of the proposed method, the results of numerical example are compared with those of the pseudo-static strength reduction method, the results show: (1) two methods are both feasible, the plastic zone of structure is upward migration if the pseudo-static method is used, but the plastic zone is at the bottom if new methods are used. (2) the safety coefficient error of new method I is 9.4%, and is 11.1% of new method II. (3) the safety factor of new method II is minimum, and the safety factor of new method I is maximum, but the general difference is very small. Therefore, in order to ensure the safety of structure, the new method II is proposed to evaluate seismic stability of the rock mass and soil mass surrounding tunnel, and so a theoretical basis is provided for the seismic stability of the rock mass and soil mass and the lining surrounding tunnel, and also provided for engineering application.
关键词	Earthquakes Numerical methods Rock mechanics Rocks Safety factor Soils Stability Structural design Tunnels Earthquake stability Engineering applications Finite element software New methods Pseudostatic method Safety evaluations Safety of structures Seismic safety evaluations
收录类别	EI
语种	英语
EI入藏号	20135217126194
EI主题词	Earthquake engineering
来源库	Compendex
分类代码	401.2 Tunnels and Tunneling - 408.1 Structural Design, General - 483.1 Soils and Soil Mechanics - 484 Seismology - 914.1 Accidents and Accident Prevention - 921.6 Numerical Methods
文献类型	会议论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/116560
专题	土木工程学院
作者单位	1.School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2.Key Laboratory of Urban Security and Disaster Engineering of Education, Beijing University of Technology, Beijing 100124, China; 3.Department of Civil Engineering, Logistical Engineering University, Chongqing 40041, China
第一作者单位	土木工程学院
推荐引用方式 GB/T 7714	Cheng, Xuansheng,Zheng, Yingren,Tian, Ruirui,et al. New methods of safety evaluation for the rock/soil mass surrounding tunnel under earthquake[C]:Science Press,2012:1247-1256.