ABSTRACT
Under the new regulatory requirements for nuclear power plants, the evaluation of the liquefaction potential of rock debris, conventionally regarded as non-liquefiable soil, is necessary because the standard ground motion is stronger. Recently, an energy-based method was proposed for rational liquefaction prediction. In this study, to verify the applicability of energy-based liquefaction prediction to rock debris, the predicted results were compared with those of two centrifugal model tests performed on saturated rock debris under a centrifugal acceleration of 50 G. In one case, the entire layer was liquefied, and in another, the deep layer did not liquefy. In the energy-based method, the dissipated energy of each layer was calculated using nonlinear total stress analysis. The liquefaction prediction results of the energy-based method were consistent with experimental results.
