Model test study on dynamic response from high earth-rock fill dam of Lianghekou Hydropower Station with shaking table for seismic simulation

The model tests on the dynamic response from the high earth-rock fill dam of Lianghekou Hydropower Station were made with a large shaking table for seismic simulation.In the tests,the acceleration response characteristics of the model dam was obtained by the measurement and analysis to acceleration response of measure points in the model dam;the seismic residual deformation of the model dam was obtained by measurement to the displacement measure points on surface of the model dam after the earthquakes;the dynamic failure process and mode of the model dam was obtained by direct observation to the dynamic response of model dam in the earthquakes.The study shows that the acceleration response characteristics of the dam is greatly impacted by the factors i.e.the spatial location,type and intensity of input seismic wave,the early vibration,impoundment,etc.The seismic permanent horizontal displacement and vertical settlement are relatively less under the seismic effect,furthermore,the failure pattern of dam is the shallow sliding induce by the rock falling in the valley and on the slope near dam crest.