ABSTRACT
In Japan, a slip safety factor based on an equivalent linear analysis is conventionally used to evaluate the stability of rock foundations under critical facilities in terms of the sliding motion during an earthquake. In this study, dynamic centrifugal model tests were performed to assess the seismic stability evaluation method for rock foundations. The results confirmed the feasibility of the method. In addition, the displacement of rock masses because of sliding was observed to be limited even when the slip safety factor had a value of less than 1. This confirms that, in the event of an earthquake, rock foundations do not become unstable spontaneously. Therefore, evaluating the seismic stability based on ground displacement is considered to be an effective approach.
