Seismic behaviors of earth-core, concrete-faced-rock-fill, and composite dams

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Abstract

The investigation on the seismic behavior of dams becomes crucial but is limited due to lack of experimental or field data. This paper aims to experimentally simulate the seismic behavior of three types of dams; earth-core rock-fill dam (ECRD), concrete-faced rock-fill dam (CFRD), and composite dam which combines concrete dam and CFRD. A series of staged centrifuge tests was performed by applying real earthquake record from 0.05g to 0.5g. The distributions of amplification ratio differed depending on the magnitude of earthquake loading, zoning condition, and dam type. The residual settlements and horizontal displacement at the dam crest were small but shallow surface sliding was dominant. The behavior of composite dam is also compared with the behaviors of CFRD.