【摘要】 为研究地基特性对坝体—库水—地基流固耦合的影响,以印度柯依那(Koyna)重力坝为例,采用ANSYS中的声学流体单元模拟库水,分别计算了地基为弹性、刚性时坝体在KOBE地震波作用下,典型时刻内库坝面上动水压力分布规律,以及坝顶上游侧水平和竖直位移的时程曲线,进行了模态分析并提取了前7阶频率。结果表明,地基特性对坝体—库水—地基流固耦合的影响非常大,不能简单地将地基视为刚性进行抗震设计。更多还原

【Abstract】 In order to study the influence of foundation properties on the dam-reservoir-foundation of fluid-solid coupling,taking the Koyna gravity dam for an example,the acoustic fluid element in Ansys is used to simulate the reservoir water.Considering the elastic and rigid foundation under earthquake action of KOBE wave,this paper calculates the hydrodynamic pressure distribution rules of the dam surface in typical time,and the time history curves of the horizontal and vertical displacement of the upstream dam crest.And then the modal analysis is carried out to extract the first seven-order frequency.The results show that the influence of foundation properties on dam-reservoir-foundation fluid-solid coupling is obvious and it can not be simply regarded the foundation as rigid for seismic design.更多还原