Abstract
In case a level 2 tsunami occurs, the wave height is expected to be higher than a design wave height of a seawall, as a result, the wave possibly overflows into the hinterland of the seawall. For the purpose of disaster reduction, we should examine the influence of the overflown tsunami on the buildings behind the seawall.
We herein presented an approximate model to express collapsing behaviors of the seawall, as well as a numerical method to reproduce the overflow motions under the seawall collapsing situation. We examined the characteristics of the tsunami overflows and the seawall collapsing behaviors. Detailed discussion is made on the varying characteristics of the tsunami wave force acting on a hinter building with change of seawall collapsing motions.
