Abstract
The present design procedures for the breakwater with footing ignore a wave pressure acting on the footing under the assumption that the compressive force on the upper face of the footing can be cancelled by the uplift force on the bottom face of the footing. This assumption is acceptable, but the experiments have confirmed that the compressive force becomes much lager for the case of long footing than the uplift force and works to stabilize the breakwater. We have proposed two empirical formulas for the distributions of uplift and compressive pressures. However, the validity of the formulas was not confirmed for random wave experiments. The present paper describes the confirmation of their validity thorough the experiments in random wave and numerical simulations. The empirical formulas are slightly improved.
