Dynamic centrifuge modelling tests on seismic response of super-high core dams

In order to study the seismic behaviors of a super-high core dam under design seismic intensity, 4 dynamic centrifuge modelling tests are carried out. The models have the same scale and different centrifugal accelerations. Thus, the acceleration response, deformation and stability are analyzed through the extrapolation analysis. The crest acceleration amplification factor is 2.97~3.03. The crest settlement rate is 0.41%, 0.56% and 0.64%, respectively under 3 design earthquakes. The total crest settlement increases, but the incremental settlement decreases rapidly with the number of earthquakes. The settlements of the core, downstream rockfill and upstream rockfill are greater than the former. The core is stable and the settlement of the downstream rockfill is slight. The earthquakes cause the settlement of the upstream rockfill to the storage level. The aseismic measures are necessary to provide the core from exposure according to the test results.