| Evaluation of seismic performance of dams is important. According to “Guidelines for SeismicPerformance Evaluation of Dams against Large Earthquakes (Draft)” issued by the River Bureauof the Ministry of Land, Infrastructure, Transport and Tourism in Japan in March 2005, slidingdeformation is identified one of the most important issues in the evaluation of seismic performanceof embankment dams.To evaluate sliding deformation of embankment dams due to earthquakes, Newmark’s method iswidely used. In the sliding deformation analysis, number of slip circles is generally restricted dueto capacity of computer and a few dozens of slip circles has been used in many previous researches.However, similar to the static sliding stability analysis, method for arbitrarily searching a circle ofmaximum sliding deformation is also desirable in Newmark’s method. Therefore, we conducted aresearch to investigate the effects of the limited number of slip circles and the arbitrary slip circleson sliding deformation of embankment dams based on Newmark’s method due to earthquakes for amodel dam of an earth core rockfill dam.We compared the results between the limited number of slip circles and the arbitrary slip circles,and we confirmed that the maximum sliding deformation of the arbitrary slip circles was largerthan that of the limited number of slip circles. |
