Abstract
For structures and facilities in coastal areas, realization of effective countermeasures against tsunamis as well as strong earthquake motions is required. In this study, we proposed and researched the countermeasure technology based on the idea of seismic isolation and tsunami isolation to prevent and mitigate the disasters in coastal areas. In the safety evaluation of structures against tsunami, it is considered that the setting of distribution shape of wave pressure has a significant impact on the stress generated in the structures. Therefore, four shapes of wave pressure distribution, namely rectangular, pentagonal, trapezoidal, and triangular, were set and three-dimensional FEM analysis was performed. As a result, it was confirmed that the stress generated in the structure changed greatly depending on the distribution shape of the wave pressure, and that the generated stress increased more greatly when the rectangular shape was set than when the triangular shape was set. From these results, in order to practice appropriate safety evaluation, it is necessary to set the distribution shape of the wave pressure accurately.
