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中文摘要：
常规的拟静力方法不能反映出深厚覆盖层上高土石坝的动力特性，而应从坝体材料的动力稳定性、坝体地震后的永久变形和坝坡地震过程中稳定安全系数时程变化等方面综合评价大坝的安全性．结合一工程实例，建立了深厚覆盖层上高土石坝的三维有限元动力分析模型，对大坝的抗震稳定性进行分析及评价．研究表明：坝体中较大的加速度数值集中在坝顶向下1／3的坝高范围，而此处以下部分的加速度数值与基岩加速度数值大致相同或略小；地震过程中，坝坡最危险安全系数滑弧由静力最危险滑弧逐步向坝顶方向移动．
英文摘要：
Conventional quasi-static method can not take into consideration the effect of dynamic behaviour of high earth-rockfill dam on deep overburden. The aseismatic stability of dam should be evaluated by the safety factor of material＇s dynamic strength, the permanent deformation after the earthquake and the slope stability during the earthquake. In this paper, the dynamic behavior of a real high earth-rockfiU dam on deep overburden is studied by three dimensional nonlinear dynamic finite element analysis in detail. The result shows that in overburden layer the high seismic acceleration distribution coefficient locates at one third height from the dam crest. And below this height, the maximum response acceleration is similar or smaller than the maximum input value. It is also founded that during the earthquake process, the most dangerous slide surface is moved gradually from the original position to the dam crest.
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同项目期刊论文
Develoment technology of rigidity-drain ile and numerical analysis of its anti-liquefaction characte
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