A Study on Maintenance Methods Considering Expected Maintenance Costs of Caisson Breakwaters Covered with Wave-dissipating Concrete Blocks

Abstract

In this study, we propose a new method for caisson breakwaters covered with wave-dissipation concrete blocks, which enables to evaluate cumulative maintenance costs including both ordinary maintenance costs (to raise work level of the blocks) and disaster recovery costs due to an extreme wave load. The method is based on a statistical model (Monte Carlo Simulation) calculating sliding distances of a caisson during its working life. This method can be effectively utilized for planning maintenance strategies, considering how the ordinary maintenance criteria for the settlement of the blocks affects the cumulative maintenance costs including information on both expected value and the its variations.