【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。更多还原

【Abstract】 In order to find out the response of dam body under the interaction of a dam-reservoir-sediment deposit-foundation interaction system during earthquake,a 2-D calculation model is established under the consideration of the effect of flexible foundation 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 resonance 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 dynamic response of concrete dam body.更多还原