基于强度折减法的高烈度地震区边坡稳定性分析
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摘要
将边坡安全稳定系数作为岩土体参数的折减系数对岩土体参数进行折减,采用有限元软件ANSYS进行动力分析,求得地震作用过程中边坡稳定性系数;通过边坡断面横向加速度位移时程曲线研究了高边坡的动力特性;结合工程算例,分析了高边坡在地震条件下的失稳破坏机理,验证了强度折减动力分析法的可行性。研究表明:强度折减动力分析法能直接评价边坡地震稳定性,也能充分反映边坡的动力效应。
Through strength reduction of rock and soil parameters,the seismic slope stability factor during the process of earthquake was obtained by finite element software ANSYS.The dynamic characteristics of high slope was studied after analysis of lateral acceleration versus time of cross section.With examples of slope in high-intensity earthquake zone,the slope failure mechanism under the earthquake was analyzed;feasibility of the strength reduction dynamic analysis was validated.The study indicated that strength reduction analysis could determine slope stability in earthquake zone as well as the dynamic effect.
Through strength reduction of rock and soil parameters,the seismic slope stability factor during the process of earthquake was obtained by finite element software ANSYS.The dynamic characteristics of high slope was studied after analysis of lateral acceleration versus time of cross section.With examples of slope in high-intensity earthquake zone,the slope failure mechanism under the earthquake was analyzed;feasibility of the strength reduction dynamic analysis was validated.The study indicated that strength reduction analysis could determine slope stability in earthquake zone as well as the dynamic effect.
引文
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[7]戴妙林,李同春.基于降强法数值计算的复杂岩质边坡动力稳定性安全评价[J].岩石力学与工程学报,2007,26(增刊1):2749-2754.DAI Miao-lin,LI Tong-chun.Analysis of dynamic stabilitysafety evaluation for complex rock slopes by strength reduction nu-merical method[J].Chinese Journal of Rock Mechanics and Engi-neering,2007,26(Supp1):2749-2754.
[8]陈无平,谢伟平,王国波.混凝土动弹模对地铁车站结构地震响应影响的分析[J].武汉工业学院学报,2008,27(1):65-68.CHEN Wu-ping,XIE Wei-ping,WANG Guo-bo.Analysis ofinfluence of dynamic elastic module of concrete on seismic re-sponse of subway station structure[J].Journal of Wuhan Polytech-nic University,2008,27(1):65-68.
[9]郑永来,夏颂佑.岩土类材料的动弹性模量机理[J].震动与冲击,1997,16(2):56-61.ZHENG Yong-lai,XIASong-you.Mechanism of dynamic mod-ulus of elastic for geotechnical materials[J].Journal of Vibrationand Shock,1997,16(2):56-61.
[2]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 Ying-ren,YE Hai-lin,HUANG Run-qiu.Discussionand analysis on falure mechanism and fracturesurface of slope un-der earthquake effect[J].Chinese-Journal of Rock Mechanicsand Engineering,2009,28(8):1714-1723.
[3]郑颖人,赵尚毅.边(滑)坡工程设计中安全系数的讨论[J].岩石力学与工程学报,2006,25(9):1937-1940.ZHENG Ying-ren,ZHAO Shang-yi.Edge(sliding)slope en-gineering discussion of the safety factor[J].Chinese-Journal ofRock Mechanics and Engineering,2006,25(9):1937-1940.
[4]柳林超,梁波,刁吉.基于ANSYS的有限元强度折减法求边坡安全系数[J].重庆交通大学学报:自然科学版,2009,28(5):899-901.LIULin-chao,LIANG Bo,DIAO Ji.Using FEMstrength reduc-tion method based on ANSYS to solve slope safety coefficients[J].Journal of Chongqing Jiaotong University:Natural Science,2009,28(5):899-901.
[5]李凯,李红建,陈国荣,等.有限元强度折减法的三维边坡稳定性分析[J].路基工程,2009,26(3):7-8.LI Kai,LI Hong-jian,CHENGuo-rong,et al.Three-dimen-sional slope stability analysis by strength reduction finite element[J].Subgrade Engineering,2009,26(3):7-8.
[6]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 Hai-bo,XIAO Ke-qiang,LIUYa-qun.Factor of safety a-nalysis of bedding rock slope under seismic load[J].Chinese Jour-nal of Rock Mechanics and Engineering,2007,26(12):2385-2394.
[7]戴妙林,李同春.基于降强法数值计算的复杂岩质边坡动力稳定性安全评价[J].岩石力学与工程学报,2007,26(增刊1):2749-2754.DAI Miao-lin,LI Tong-chun.Analysis of dynamic stabilitysafety evaluation for complex rock slopes by strength reduction nu-merical method[J].Chinese Journal of Rock Mechanics and Engi-neering,2007,26(Supp1):2749-2754.
[8]陈无平,谢伟平,王国波.混凝土动弹模对地铁车站结构地震响应影响的分析[J].武汉工业学院学报,2008,27(1):65-68.CHEN Wu-ping,XIE Wei-ping,WANG Guo-bo.Analysis ofinfluence of dynamic elastic module of concrete on seismic re-sponse of subway station structure[J].Journal of Wuhan Polytech-nic University,2008,27(1):65-68.
[9]郑永来,夏颂佑.岩土类材料的动弹性模量机理[J].震动与冲击,1997,16(2):56-61.ZHENG Yong-lai,XIASong-you.Mechanism of dynamic mod-ulus of elastic for geotechnical materials[J].Journal of Vibrationand Shock,1997,16(2):56-61.
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