Sliding and Overturning of Caissons by Storm Waves

Abstract

paper concerns the stability of caissons during wave loading. The damages induced to Stretches B and C of the Shin-Nagasaki South_breakwater during Typhoon 8712 are outlined. This is followed by a theoretical discussion of the overturning behaviour of caissons, with the inertial resistance being properly allowed for. The expression for the lower bound of driving moments sufficient to overturn a given caisson is derived. The limiting driving moments obtained for Stretches B and C are then converted to the destructive wave heights, with the aid of Goda's (1974) wave-pressure formulae.