ABSTRACT
Breakwaters of cylindrical shape have been widely studied in the past. The first bottom-seated semicircular breakwater was constructed at Miyazaki Port, Japan in the period 1992 to 1993 (Sasajima et al., 1994; Aburatani et al., 1996); and the similar breakwaters were subsequently constructed in Tianjin Port and Yangtze River Estuary, China in 1997 and 2000 (Xie, 2001), respectively.The breakwaters with a semicylindrical shape offer a number of advantageous apart from having reasonably good wave attenuation performance, i.e. good structural stability, high stability against the wave action, applicability in the soft soil foundation, low construction and maintenance costs, ease of construction, and good scenery enhancement. Further research on the the breakwater with perforations was carried out by Sundar & Ragu (1987), Graw et al. (1998), and Dhinakaran et al. (2008).
