FUNDAMENTAL STUDY ON APPLICABILITY OF ISOLATION STRUCTURE AGAINST EARTHQUAKE MOTION AND TSUNAMI BY UTILIZING ASPHALTIC VISCOUS FLUID

Abstract

 Wastewater treatment plants are usually constructed at coastal zone and river mouth area because of gravity system for collecting sewage. Consequently, they can be attacked by not only strong motion but also tsunami at earthquake time. In this study, we proposed isolation structural method against strong earthquake motion and tsunami by utilizing asphaltic viscous fluid isolator. Applicability of the method was examined by numerical analyses based on incompressible smoothed particle hydrodynamics. As a result, it is considered that wave pressure induced by tsunami can be reduced due to three-dimensional cushion effect of isolator.