地震动峰值速度对小湾拱坝动力响应的影响分析

为了探究地震动峰值速度对拱坝的影响,采用大型有限元分析软件ABAQUS建立了小湾特高拱坝三维有限元模型,考虑地基-坝体-库水相互作用,计算正常蓄水位温降工况下坝体各向位移和应力的最大值及其最大增幅。结果表明,随着峰值速度增幅的增加,坝体最大第一、三主应力的增幅及坝体各向位移均随之增加,坝体最大第三主应力的增幅增加较快,峰值速度对坝体最大第三主应力影响更加显著,在设计及施工管理运行中应引起足够的重视。

Analysis of Influence of Peak Velocity of Ground Motion on Dynamic Response of Xiaowan Arch Dam

In order to explore the influence of peak velocity of ground motion on the arch dam,a three-dimensional finite element model of Xiaowan super high arch dam was established by using ABAQUS.Considering the interaction between foundation,dam body and reservoir water,the maximum values of displacement and stress in all directions and the maximum increase of stress were calculated under the condition of normal pool level and temperature drop.The results show that with the increase of peak velocity of ground motion,the increase of the maximum first and third principal stresses and the displacement in all directions of the dam body increase.The maximum third principal stress of the dam body increases rapidly,and the peak velocity has more significant influence on the maximum third principal stress of the dam body,which should be paid enough attention in the design and construction management operation.