Perforated and OWC Caissons
Some perforated caisson breakwaters have double wave chambers, for which no clear guideline for estimating design load is available. Considering this, physical experiment was performed to develop a wave pressure formula for double-chamber perforated caisson. The wave loadings on the vertical and horizontal forces on each wall of the double-chamber caisson were independently measured by both load cells and pressure transducers. Then, the force adjustment factors were determined for all the vertical and horizontal walls of the structure, similarly as the well-known Takahashi's formula (Takahashi and Shimosako, 1994) that is used for single-chamber caisson.