坝体—库水—淤积层—地基系统地震动分析  

Analysis on seismic dynamic response of dam-water-sediment depositfoundation interaction system

作　　者：王铭明[1] 武亮[1] 陈健云[2] 孙胜男[3] 

机构地区：[1]昆明理工大学电力工程学院,云南昆明650500 [2]大连理工大学海岸与近海国家重点实验室,大连辽宁116024 [3]聊城大学建筑工程学院,山东聊城252059

出　　处：《水利水电技术》2015年第1期26-29,33,共5页Water Resources and Hydropower Engineering

基　　金：云南省自然科学基金(KKSY201404026);国家自然科学基金(51269007);国家重点基础研究发展计划("973"计划)项目(2013CB035905)

摘　　要：为明确地震中坝体—库水—淤积层—地基系统相互作用下坝体的反应,将泥沙淤积层作为粘性、可压缩及大密度流体,考虑柔性地基作用建立了二维计算模型。本模型计算结果与以往报道结果相一致:柔性地基与淤积层都能够降低库坝系统的共振频率及反应幅值。此外,本文提出的方法简单、编程方便及运算速度快等特点可以较方便地应用到混凝土坝体非线性动力响应计算中。In order to find out the response of dam body under the interaction of a dam-reservoir-sediment deposit-foundation in- teraction system during earthquake, a 2 - D calculation model is established under the consideration of the effect of flexible foun- dation by taking sediment deposit as a viscous and compressible fluid with large density. The result of the model calculation made herein accords with those from the previous reports, i.e. both the flexible foundation and the sediment deposit can lower the reso- nance frequency and response amplitude of a reservoir-dam system. Moreover, the method given herein is simple with the features of convenient programming and quick calculation, and then can be conveniently applied to the calculation of the nonlinear dynam- ic response of concrete dam body.

关 键 词：大坝 动力响应 淤积层 柔性地基 粘性可压缩流体 

分 类 号：TV312[水利工程—水工结构工程] TU311.3[建筑科学—结构工程]