NUMERICAL ANALYSIS ON TSUNAMI-INDUCED FORCES ON OPEN-TYPE WHARVES ON VERTICAL PILES

Abstract

 Open-type wharves on vertical piles may be effective to prevent and reduce the damage due to earthquake and tsunami. However, performance verification method for the structure has not been established. In this study, we conducted three-dimensional numerical analysis on the open-type wharves under steady flow condition. Based on the calculated results, we tried formulation of horizontal force acting on the pier. The model reproduced the experimental results well and showed that numerical analysis is applicable to the calculation of tsunami-induced forces including pressure. After understanding the wave pressure distribution acting on the deck block in detail, the horizontal forces were formulated using water depth, flow velocity and structural parameters, and the validity was shown from the relationship with measurement forces. In practice it can be calculated assuming the drag coefficient constant.