Slope Stability Analysis in Highintensity Earthquake Zone by Strength Reduction Method

doi:10.3969/j.issn.1674-0696.2011.02.22

Abstract

Abstract: 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 o f 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 valid dated. The study indicated that strength reduction analysis could determine slope stability in earthquake zone as well as the dynamic effect.

Key words: finite element method strength reduction, dynamic analysis, slope stability, failure mechanism

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。

关键词: 有限元强度折减法, 动力分析, 边坡稳定性, 破坏机理

CLC Number:

TU457

SHI Shirong, CHEN Linjie, YU Chao. Slope Stability Analysis in Highintensity Earthquake Zone by Strength Reduction Method[J]. Journal of Chongqing Jiaotong University(Natural Science), 2011, 30(2): 273-276.

史石荣，陈林杰，余超. 基于强度折减法的高烈度地震区边坡稳定性分析[J]. 重庆交通大学学报（自然科学版）, 2011, 30(2): 273-276.

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