考虑土体固液两相性的心墙堆石坝地震反应分析研究

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英文篇名：Seismic response analysis of core-wall rock fill dam considering the solid-liquid two phase nature of the soil 作者：李蔚 英文作者：LI Wei;Ganzhou Survey and Design Institute of Water Conservancy and Hydropower; 关键词：水工结构 ; 土石坝 ; 动力分析 ; 固液两相性 英文关键词：hydraulic structure;;earth and rock fill dam;;dynamic analysis;;solid-liquid two phase nature 中文刊名：NFYX 英文刊名：Journal of Jiangxi University of Science and Technology 机构：赣州市水利电力勘测设计研究院; 出版日期：2017-02-15 出版单位：江西理工大学学报 年：2017 期：v.38;No.185 语种：中文; 页：NFYX201701003 页数：6 CN：01 ISSN：36-1289/TF 分类号：19-24

摘要

在传统的心墙堆石坝地震响应影响问题分析中,坝体筑坝材料通常采用单相介质等价线性粘弹性模型,用此模型进行分析,虽然在计算上较为简便,但与土体实际的动力反应不符,无法准确反应坝体在地震动力作用下的真实特性.文章将部分坝体模拟为固液两相孔隙介质,建立以固相位移和液相压力为基本未知量的两相介质动力方程进行分析.文中采用该模型详细的研究了坝体孔隙水压力在地震过程中的生成、增大,以及在地震结束后的消散过程,表明孔隙水压力的增长,将影响坝体的地震响应,可以根据此模型来判断对应的坝体部位产生液化现象的可能性.
        The traditional seismic response analysis cannot accurately reflect the real features of the dam body during the earthquake although it is simple in calculation.In this paper, a model for the dynamic response analysis of dam-water-foundation coupling system is constructed.Some parts of the earth and rock fill dam are treated as a two phase of solid-liquid porous media and the dynamic equations are solved for solid-phase displacement and fluid pressure by the scheme.This model is applied to analyze seismic response of earth and rock fill dams, to get the result of the dam pore water pressure generation and to analyze the dissipation process after the earthquake.The results show that the increase of pore water pressure will influence the seismic response of the dam body, which can estimate the possibility of the liquidation of the dam body.

引文

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