Abstract: Earthquake disaster avoiding is very important for the safety of earth-rockfill dams.It is accepted that rockfill dams are with nicer aseismic behavior.Although some high rockfill dams were tested by strong earthquakes,the limit aseismic capacity of a rockfill dam is still concerned.Numerical model is a useful method to estimate the dynamic response and to analyze the security of a dam during earthquake.3-D FEM method is used to analyze the seismic dynamic behavior of a high earth core rockfill dam.The eart...