Lee, J.-I. and Kim, Y.-T., 2018. Stability on Concrete Armor Unit at Sharply Curved Corner. In: Shim, J.-S.; Chun, I., and Lim, H.S. (eds.), Proceedings from the International Coastal Symposium (ICS) 2018 (Busan, Republic of Korea). Journal of Coastal Research, Special Issue No. 85, pp. 1116–1120. Coconut Creek (Florida), ISSN 0749-0208.
The breakwaters are one of the most important structures in coastal areas. In the design of rubble mound structures, accurate determination of the stable weight of concrete armor units is critical. This can be calculated using the Hudson or van der Meer formula, wherein the breakwater is assumed straight and the waves are assumed to propagate normally to the structures. The weight of concrete armor units at the head should be at least 1.3–1.6 times that at the trunk. However, design standards for the damage inflicted to concrete armor units at the convex corner of a breakwater are lacking. In this study, three-dimensional hydraulic model tests were performed to determine the stable weight of concrete armor units at the convex corner. Tetrapods were used as the target concrete armor units. The stable weight is suggested using a stability coefficient using Hudson formula. The results show that the stable armor weight at the convex corner is similar to that at the roundhead, could conclude that the weight at the convex corner should be approximately 1.4 times that at the trunk.