Abstract
A lot of properties and lives were lost by the 2011 Tohoku Earthquake. In addition, a large tsunami breakwater (e.g. Kamaishi Port) as well as many breakwaters were collapsed by tsunami attack. There are few studies to clarify the the failure process of composite beakwater consisted of a caisson and mound accompanying with large deformation. In this paper, we developed a numerical model that can analyze the large deformation of composite breakwater using DEM, and confirmed the applicability of numerical model by comparing experimental results and numerically simulated ones. It was found that the discontinuity of friction coefficient is one of important factors for reproducing the tilting and sinking of caisson and mound deformation.
