EXPERIMENTAL STUDY OF TSUNAMI WAVE FORCE ACTING ON STRUCTURES WITH MULTIPLE PILLARS

Abstract

 Although a lot of buildings were damaged by the Great East Japan Earthquake in 2011, many buildings with piloti floor weren't destroyed. Thus they are thought to be effective for decreasing tsunami wave force. In this study, as a first step to understand tsunami wave force acting on the building with piloti floor, we have carried out physical experiments to investigate tsunami wave force acting on the structure with multiple pillars.
 We have shown that 1) drag coefficient decreased as Froude number increased for all model condition, 2) model condition (shape of pillar, number of pillars, interval between pillars) affects drag coefficient. We have also classified water surface profile by shape of pillar and Froude number.