中文摘要：

文章利用快速拉格朗日分析（fast Lagrangian analysis of continua，FLAC）商用软件，应用动力弹塑性分析方法对高土石坝进行大变形分析，讨论了地震作用下坝顶的塑性剪应变的变化过程、坝坡的位移时程变化、坝体永久位移变化，研究了地震作用下高土石坝的破坏性态，为大坝的抗震安全措施提供理论依据。

英文摘要：

Ahsteact-The large deformation analysis of high earth-rockfill dam subjected to earthquake is presented by u- sing the dynamic elasto-plastic analysis method with fast Lagrangian analysis of continua（FLAC） commercial software. The change of plastic shear strain of dam crest, the time-history change of the displacement of dam slope and the change of permanent displacement of dam body during earthquake are researched. And the dam age properties of high earth-rockfill dam under earthquake are studied. The conclusion can provide a theoreti- cal basis for the choice of the corresponding anti-seismic measures. Key words：high earth-rockfill dam; permanent deformation; elasto-plastic