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工程力学  2014 

白鹤滩水电站左岸边坡抗震分析

, PP. 149-154

Keywords: 边坡,地震输入模型,强储系数,地震超载系数,边坡稳定

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Abstract:

该文简单介绍了边坡地震自由场输入模型,其中,拉格朗日不连续变形分析方法(LDDA)被用来模拟断层、裂隙和结构面,粘弹性边界为吸能边界以体现无限地基辐射阻尼的影响,利用该模型,对白鹤滩水电站左岸岩质边坡进行了分析计算。通过引入岩体结构面降强系数与地震作用超载系数,分别建立了这两个系数和最大残余位移以及结构面最大张开度的关系,从而得出加固后白鹤滩左岸边坡设计地震作用下强度储备安全系数约为1.18,而超载安全系数约为1.25的结论。该文提出的分析方法有别于刚体极限平衡分析,通过工程实际应用表明,边坡地震自由场输入模型为边坡动力稳定分析提供了一个有效的工具。

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