Dynamic finite element strength reduction method of earthquake stability analysis of surrounding rock of tunnel

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	Dynamic finite element strength reduction method of earthquake stability analysis of surrounding rock of tunnel
	Cheng, Xuan-Sheng 1,2; Zheng, Ying-Ren 2; Tian, Rui-Rui 1
刊名	Yantu Lixue/Rock and Soil Mechanics
	2011-04-01
卷号	32 期号:4 页码:1241-1248
关键词	Convergence of numerical methods Damping Earthquakes Factor analysis Finite element method Modal analysis Numerical methods Rocks Safety factor Static analysis Temperature distribution Thermoanalysis Tunnels Damping coefficients Dynamic analysis models Dynamic finite element Earthquake stability Engineering applications Surrounding rock of tunnel Surrounding rock structures Temperature boundary
ISSN号	10007598
英文摘要	In order to obtain earthquake safety factor of surrounding rock of tunnel, using FEM software ANSYS, firstly, modal analysis is done by adopting the model under the horizontal earthquake action; and then mass damping coefficient and stiffness damping coefficient are obtained. Secondly, the horizontal support reaction force along the vertical borders is obtained by the static analysis. Thirdly, for considering the gravity influence in dynamic analysis, structure gravity is become into temperature boundary condition; and the temperature of each node in model is obtained by thermal analysis. Finally, adopting the dynamic analysis model of cantilever beam, and inputting into the node temperature which is obtained by using thermal analysis, and applying the level support reaction force along the vertical borders, cohesion c and friction angle φ in plastic zone are continuously discounted until the calculation is not convergent; and then the earthquake safety factor of surrounding rock of tunnel is obtained. Numerical example result shows that this approach is feasible, the measure that the structure gravity is become into the node temperature solves the difficulty that the structure gravity can not be considered in previous dynamic analysis; and so a theoretical basis is provided for dynamic safety factor calculation and engineering application of surrounding rock of tunnel under earthquake.
WOS研究方向	Engineering
语种	中文
出版者	Academia Sinica
WOS记录号	WOS:000410709000048
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/111324]
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.Department of Civil Engineering, Logistical Engineering University, Chongqing 400041, China;
推荐引用方式 GB/T 7714	Cheng, Xuan-Sheng,Zheng, Ying-Ren,Tian, Rui-Rui. Dynamic finite element strength reduction method of earthquake stability analysis of surrounding rock of tunnel[J]. Yantu Lixue/Rock and Soil Mechanics,2011,32(4):1241-1248.
APA	Cheng, Xuan-Sheng,Zheng, Ying-Ren,&Tian, Rui-Rui.(2011).Dynamic finite element strength reduction method of earthquake stability analysis of surrounding rock of tunnel.Yantu Lixue/Rock and Soil Mechanics,32(4),1241-1248.
MLA	Cheng, Xuan-Sheng,et al."Dynamic finite element strength reduction method of earthquake stability analysis of surrounding rock of tunnel".Yantu Lixue/Rock and Soil Mechanics 32.4(2011):1241-1248.