基于有限元强度折减法的地震区三维边坡稳定性分析
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摘要
结合工程实例,采用有限元强度折减法对地震区三维边坡进行静力和拟静力分析,探讨了该方法的基本原理、屈服准则和失稳判据等。在采用有限元软件ANSYS求得三维边坡安全系数的基础上,对边坡的稳定性进行了评价;同时与传统极限平衡方法、二维有限元法所得的安全系数进行对比。结果表明:有限元强度折减法应用于地震区三维边坡稳定性分析是可行的。
Combining with engineering examples,the strength reduction FEM is used to do static and pseudo-static analysis on the three-dimensional slope;the basic principle,yield criterion,instability criterion etc.of the strength reduction FEM are also discussed.The safety factors of the three-dimensional slope are obtained by use of the finite element software ANSYS;furthermore,the slope stability is evaluated.At the same time,the safety factors got by the proposed method are compared with those got by the traditional limit equilibrium method and 2D FEM.The results show that it is feasible that strength reduction FEM is applied in three-dimensional slope stability analysis of the earthquake zone.
Combining with engineering examples,the strength reduction FEM is used to do static and pseudo-static analysis on the three-dimensional slope;the basic principle,yield criterion,instability criterion etc.of the strength reduction FEM are also discussed.The safety factors of the three-dimensional slope are obtained by use of the finite element software ANSYS;furthermore,the slope stability is evaluated.At the same time,the safety factors got by the proposed method are compared with those got by the traditional limit equilibrium method and 2D FEM.The results show that it is feasible that strength reduction FEM is applied in three-dimensional slope stability analysis of the earthquake zone.
引文
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[9]郑颖人,叶海林,黄润秋.地震边坡破坏机制及其破裂面的分析探讨[J].岩石力学与工程学报,2009,28(8):1714-1723.Zheng Yingren,Ye Hailin,Huang Runqiu.Discussion and analysison falure mechanism and fracturesurface of slope under earthquakeeffect[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(8):1714-1723.
[10]方建瑞,许志雄,庄晓莹.三维边坡稳定弹塑性有限元分析与评价[J].岩土力学,2010,31(12):2667-2672.Fang Jianrui,Xu Zhixiong,Zhuang Xiaoying.Appraisal and analy-sis of three-dimensional slope stability based on elastoplasic FEM[J].Rock and Soil Mechanics,2010,31(12):2667-2672.
[2]方建瑞,朱合华,蔡永昌.边坡稳定性研究方法与进展[J].地下空间与工程学报,2007,3(2):343-349.Fang Jianrui,Zhu Hehua,Cai Yongchang.Advancement and meth-ods of the slope stability research[J].Chinese Journal of Under-ground Space and Engineering,2007,3(2):343-349.
[3]赵尚毅,郑颖人.用有限单元强度折减法求边坡稳定安全系数[J].岩土工程学报,2002,24(3):343-346.Zhao Shangyi,Zheng Yingren.Analysis on safety factor of slope bystrength reduction FEM[J].Chinese Journal of Geotechnical Engi-neering,2002,24(3):343-346.
[4]李海波,肖克强,刘亚群.地震荷载作用下顺层岩质边坡安全系数分析[J].岩石力学与工程学报,2007,26(12):2385-2394.Li Haibo,Xiao Keqiang,Liu Yaqun.Factor of safety analysis ofbedding rock slope under seismic load[J].Chinese Journal of RockMechanics and Engineering,2007,26(12):2385-2394.
[5]Griffiths D V,Lane P A.Slope stability analysis by finite elements[J].Geotechnique,1999,49(3):387-403.
[6]Jeomg S,Kim B,Won J,et al.Uncoupled analysis of stabilizingpiles in weathered slopes[J].Computers and Geotechnics,2003,30(8):671-682.
[7]罗强,赵炼恒,李亮,等.地震效应和坡顶超载对均质土坡稳定性影响的拟静力分析[J].岩土力学,2010,31(12):3835-3841.Luo Qiang,Zhao Lianheng,Li Liang,et al.Quasi-static stability a-nalysis of homogeneous soil slopes under effect of surcharge andearthquake[J].Rock and Soil Mechanics,2010,31(12):3835-3841.
[8]宋雅坤,郑颖人,赵尚毅.有限元强度折减法在三维边坡中的应用研究[J].地下空间与工程学报,2006,2(5):822-827.Song Yakun,Zheng Yingren,Zhao Shangyi.Application of three-di-mensional strength reduction FEM in slop[J].Chinese Journal ofUnderground Space and Engineering,2006,2(5):822-827.
[9]郑颖人,叶海林,黄润秋.地震边坡破坏机制及其破裂面的分析探讨[J].岩石力学与工程学报,2009,28(8):1714-1723.Zheng Yingren,Ye Hailin,Huang Runqiu.Discussion and analysison falure mechanism and fracturesurface of slope under earthquakeeffect[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(8):1714-1723.
[10]方建瑞,许志雄,庄晓莹.三维边坡稳定弹塑性有限元分析与评价[J].岩土力学,2010,31(12):2667-2672.Fang Jianrui,Xu Zhixiong,Zhuang Xiaoying.Appraisal and analy-sis of three-dimensional slope stability based on elastoplasic FEM[J].Rock and Soil Mechanics,2010,31(12):2667-2672.
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