Abstract
We have proposed a triple-walled breakwater with different draft depths, which is supported by steel piles. It aims to reduce both transmitted and reflected waves for comparatively long waves such as swells. In this study, performance of such a breakwater in obliquely incident waves is examined experimentally and theoretically. Effect of partition or separation walls between the breakwater units on the performance is extensively examined. It is confirmed that the triple-walled breakwater is effective for obliquely incident waves in the same manner as the normal incidence. In oblique waves, however, the installation of partition walls is strongly recommended to reduce the reflected wave for comparatively long waves.
