基于Monte-Carlo法的土坡抗震可靠度分析
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摘要
结合Morgenstern-Price条分法和Monte-Carlo数值模拟方法,采用拟静力的方法考虑水平和竖向地震加速度的作用,运用可靠度理论分析了地震效应和土性参数对土坡稳定性的影响,且将常规的可靠度分析结果和考虑土性参数空间变异性的可靠度分析结果进行了对比,计算结果表明:水平地震加速度、土性参数及其空间变异性对土坡稳定性具有显著的影响。
Combining Morgenstern-Price method with Monte-Carlo numerical simulation method,using quasi-static approach to consider the horizontal earthquake acceleration and the vertical earthquake acceleration,the reliability theory is used to analyze earthquake effects and soil parameters on slope stability in this paper.Comparing the conventional reliability results with the reliability results with considering the spatial variability of soil parameters,a conclusion is drawn that the horizontal seismic acceleration,soil parameters and spatial variability have significant impact on the slope stability.
Combining Morgenstern-Price method with Monte-Carlo numerical simulation method,using quasi-static approach to consider the horizontal earthquake acceleration and the vertical earthquake acceleration,the reliability theory is used to analyze earthquake effects and soil parameters on slope stability in this paper.Comparing the conventional reliability results with the reliability results with considering the spatial variability of soil parameters,a conclusion is drawn that the horizontal seismic acceleration,soil parameters and spatial variability have significant impact on the slope stability.
引文
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[2]贾超,刘宁,陈进.地震作用下土坡可靠度风险分析[J].岩石力学与工程学报,2005,24(4):703-707.(JIA Chao,LIU Ning,CHEN Jin.Slope risk analysisunder the earthquake effect[J].Chinese Journal ofRock Mechanics and Engineering,2005,24(4):703-707.(in Chinese))
[3]米君楠.参数变异性及样本容量对边坡可靠度影响的研究[D].杭州:浙江大学,2007.(MI Jun-nan.Slope reliability analysis of variability of parameters andsample size[D].Hangzhou:Zhejiang University,2007.(in Chinese))
[4]谭晓慧.边坡稳定可靠度分析方法的探讨[J].重庆大学学报(自然科学版),2001,24(6):40-44.(TAN Xiao-hui.Discussion of Reliability AnalysisMethods of Slope Stability[J].Journal of Chongqing U-niversity Natural Science Edition,2001,24(6):40-44.(in Chinese))
[5]姚耀武,陈东伟.土坡稳定可靠度分析[J].岩土工程学报,1994,16(2):80-87.(YAO Yao-wu,CHEN Dong-wei.Reliability analysis of slope stability[J].Chinese Journal of Geotechnical Engineering,1994,16(2):80-87.(in Chinese))
[6]祝玉学.土坡可靠度分析[M].北京:冶金工业出版社,1993.(ZHU Yu-xue.Slope Reliability Analysis[M].Beijing:China Metallurgical Industry Press,1993.(in Chinese))
[7]松韦埝.地基工程学可靠性设计理论及实际[M].北京:人民交通出版社,1990.(SONG Wei-nian.Foun-dation Engineering Reliability Design Theory and Its Ap-plication[M].Beijing:China Communications Press,1990.(in Chinese))
[8]Vanmarcke E.H.Probabilistic modeling of soil profiles[J].Journal of Geotechnical Engineering,ASCE,1997,103(Gt11):1227-1246.
[9]Vanmarcke E.H.Random fields:Analysis and synthe-sis[M].The MITPress.Cambridge.Mass,1983.
[10]杨继红,刘汉东,秦四清,等.考虑土性参数空间变异性的边坡可靠度分析[J].工程地质学报,2007,15(2):205-211.(YANG Ji-hong,LIUHan-dong,QINSi-qing,et al.Reliability analysis of slope stability tak-ing into consideration of spatial variability of soil param-eters[J].Journal of Engineering Geology,2007,15(2):205-211.(in Chinese))
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