M. SRI KRISHNA PRIYA - Research Scholar Ocean Engineering Centre Indian Institute of Technology Madras
K.A ROOP SEKHAR - Research Scholar Ocean Engineering Centre Indian Institute of Technology Madras
V. SUNDAR - Professor Ocean Engineering Centre Indian Institute of Technology Madras
R. SUNDARA VADIVELU - Associate Professor Ocean Engineering Centre Indian Institute of Technology Madras

The semicircular breakwater (SBW) is a semicircular-shaped hollow caisson founded on a rubble mound. It is cast as different elements and made of prestressed concrete. Since the caisson is hollow, its weight and the materials to be used are significantly less. The stability against sliding for SBW is good, since, the horizontal component of the wave force is smaller compared to the vertical component. In addition, the vertical component is applied downward the curved wall. The SBW enhances the scenery compared to the conventional rubble mound breakwaters. Due to high stability against the wave action and a soft round feature, it is expected that it can also serve well as offshoredetached breakwaters adopted for the protection of the coast against erosion. Further, the presence of SBW submerged and placed in front of main structures like sea walls, vertical walls, closed jetties, etc its presence will reduce the pressures and forces exerted on the main structure.

dynamic pressures, wave forces, reflection, coastal protection, breakwaters, wave structure interaction, submerged breakwater