地震动特性对岩质边坡安全系数的影响

英文篇名：Effects of Input Ground Motion Characters on Safety Factor of Rock Slope
中文刊名：水力发电
英文刊名：Water Power
作者：侯红英 ; 郭德存 ; 刘红帅
英文作者：Hou Hongying1 ; 2 ; Guo Decun3 ; Liu Hongshuai4(1.Southwest Jiaotong University ; Chengdu 610031 ; Sichuan ; China ; 2.HydroChina Corporation ; Beijing 100120 ; China ; 3.Hydropower and Water Resources Planning & Design General Institute ; Beijing 100120 ; China ; 4.Institute of Engineering Mechanics ; China Earthquake Administration ; Harbin 150080 ; Heilongjiang ; China)
中文关键词：岩质边坡 ; 动力安全系数 ; 地震动特性 ; 地震动峰值 ; 地震动频谱特性
英文关键词：rock slope ; dynamic safety factor ; character of input ground motion ; peak of input ground motion ; frequency of input ground motion
出版日期：2012-10-12
机构：西南交通大学;中国水电工程顾问集团公司;水电水利规划设计总院;中国地震局工程力学研究所;
年：2012
期：10
出版单位：水力发电

摘要

基于显式波动有限元—极限平衡法,探讨了可靠度动力安全系数的可信度,研究了地震动峰值、频谱特性对岩质边坡安全系数的影响。研究结果表明,可靠度动力安全系数改变了以往稳定性评价指标与风险评价脱钩的做法,评价结果更为科学合理;地震动峰值基本不改变安全系数时程曲线的形状,但对安全系数的概率分布和标准差影响显著,并且与边坡安全系数呈负相关关系;地震动频谱特性对边坡可靠度动力安全系数的影响最大达到25%,不应忽视。
Based on explicit fluctuations finite element-limit equilibrium method,the credibility of dynamic safety factor of reliability is explored,and the effects of peak and frequency of input ground motion on dynamic stability of rock slope are studied.The results show that,(a) the reliability dynamic safety factor is more reasonable,and can change the practice of decoupling the stability evaluation index and risk assessment,(b)the peak of input ground motion does not alter the shape of time history curve of safety factor,but significantly influences the probability distribution and standard deviation of safety factor,and has a negative relationship with safety factor of slope,and(c)the effect of frequency of input ground motion on reliability dynamic safety factor of rock slope can reach a maximum degree of 25%.

引文

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