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采用等效粘弹性模型对某面板堆石坝进行了三维动力有限元分析,分别计算了坝体在不同地震设计烈度(峰值加速度为0.1g~0.4g)下面板堆石坝的地震动力反应。结果表明:坝体的峰值加速度随着输入地震动的增大而近似线性增大;但是峰值加速度的放大倍数随着输入地震动的增大而非线性减小。地震峰值加速度变化规律对面板堆石坝的抗震设防具有一定的借鉴意义。
The equivalent viscoelastic model is used to analyze the dynamic response of a concrete face rockfill dam by three-dimensional finite element method. The seismic response of the dam with different seismic design intensities (peak acceleration 0.1g ~ 0.4g) is calculated. The results show that the peak acceleration of dam increases linearly with the increase of input ground motion. However, the magnification of peak acceleration decreases non-linearly with the increase of input ground motion. The variation law of peak acceleration of earthquakes has certain reference significance for the seismic fortification of concrete faced rockfill dam.