WAVE RUNUP ON CIRCULAR PIER AND COUNTERMEASURE OF ITS REDUCTION BY SUBMERGED BREAKWATER

Abstract

This paper examines the characteristics of wave runup on a circular pier of a bridge constructed in a shallow sea, and investigates the countermeasure for the reduction of wave runup. The experimental results showed that the wave runup of regular and random waves increase in proportion to the incident wave height at the pier. Therefore, the wave runup height can be reduced by damping incident waves. From this point of view, a submerged breakwater is employed as a countermeasure for the reduction of wave runup and the effect on reduction of wave heights and runups is investigated by hydraulic experiments and numerical simulations.