HORIZONTAL WAVE FORCE ON SINGLE AND DOUBLE CHAMBER PERFORATED CAISSON

Abstract

Physical experiments were carried out to measure the wave force on vertical walls of perforated caisson breakwater considering several phases of a wave acting on the breakwater. The maximum horizontal wave load on each vertical wall was compared between single and double chamber caisson breakwater. The experimental data showed that the total horizontal wave force for double chamber caisson was 9.6% smaller on average than that for single chamber caisson when the total chamber width was the same for both caissons. Such reduction of the wave force seems to be due to the additional dissipation of wave energy at the porous middle wall between the two chambers of the perforated caisson.pared between single and double chamber caisson breakwater. The experimental data showed that the total horizontal wave force for double chamber caisson was 9.6% smaller on average than that for single chamber caisson when the total chamber width was the same for both caissons. Such reduction of the wave force seems to be due to the additional dissipation of wave energy at the porous middle wall between the two chambers of the perforated caisson.