Port and harbor facilities generally face severe environmental conditions compared to other infrastructure.They often tend to suffer performance degradation during their service period due to various reasons including materials deterioration and damage of structural components.Therefore,the facilities need to be maintained strategically so as to prevent them from losing their required performance during their service period.
The chloride-induced corrosion of steel bars in concrete is serious problem in concrete superstructure of open-type wharf.In order to satisfy the required performance of the structure,it is necessary to execute the strategic maintenance, though the optimized maintenance scenario is under discussion.There are broadly two types of maintenance strategy for concrete superstructures: Type I requires high levels of precaution so as not to carry out repair work during the service period; and Type II allows small-scale repair works during the service period.
This paper performed life-cycle cost (LCC) analysis for a superstructure of an open-type wharf.The various maintenance scenarios for the target structure were set based on the selected type of the maintenance strategy, and then the LCC analysis was carried out by considering the materials,and repair methods and intervals.The appropriate maintenance programs depending on the selected type of the maintenance strategy,Type I and II,were discussed by comparing the LCC of each maintenance scenarios.