Study on Seismic-Tsunami Countermeasure Technology for Onshore Structures by Utilizing Easily Deformable Cushioning Material

Abstract

We studied countermeasure technology based on the concept of seismic-tsunami isolation in order to contribute to disaster prevention of onshore structures. And, we conducted tsunami model experiment to examine the reduction effect of wave pressure by cushioning materials. As a result, it was confirmed that the wave pressure acting on the structure could be reduced by installing easily deformable cushioning material between the structure and the tsunami. In addition, as a result of the 3-D FEM analysis, it was confirmed that the stress generated in the structure changes greatly depending on the magnitude and the vertical distribution shape of the wave pressure.