深覆盖层上堆石坝地震响应分析

英文篇名：Analysis on Seismic Response about Rockfill Dam on Deep Overburden Layer
中文刊名：水利与建筑工程学报
英文刊名：Journal of Water Resources and Architectural Engineering
作者：张艳锋
英文作者：ZHANG Yan-feng(State Key Laboratory of Water Resources and Hydropower Engineering Science ; Wuhan University ; Wuhan ; Hubei 430072 ; China)
中文关键词：三维非线性 ; 等效类比 ; 抗液化
英文关键词：three-dimensional nonlinearity ; equivalent analog ; anti-liquefaction
出版日期：2008-09-15
机构：武汉大学水资源与水电工程科学国家重点实验室湖北武汉430072
年：2008
期：03
出版单位：水利与建筑工程学报

摘要

基于在静力分析中采用邓肯E-B本构模型,动力分析中采用等效的算法,以金平堆石坝为例,运用三维非线性静力和动力叠加的方法,模拟了大坝的施工和蓄水的过程,计算分析了坝体和坝基在覆盖层上的动力反应。由于本大坝缺少实验室土样液化试验,采用了工程中常用的seed方法进行等效类比。根据分析结果,建议可考虑对坝脚区域覆盖层进行加固处理,提高其密实度和排水性能,以增强其抗液化安全性。
Based on application of Duncan E-B constitutive model in static analysis and application of equivalent algorithm in dynamic analysis,and taking Jinping rockfill dam as an example,the construction and water-storage process of the dam is simulated and the dynamic response of the dam body and foundation on the overbunden layer is calculated and analyzed by using the three-dimensional nonlinear static and dynamic superposition method.Because of lacking of the soil samples liquefaction tests in laboratory,the seed method is used to make equivalent analog.According to analysis results,it is proposed to strengthen the overbunden layer in toe of the dam in order to increase its density and drainage performance and enhance its anti-liquefaction security.

引文

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