水道管路の震害予測

Abstract

It has been said that the damage of subsurface pipe system is governed by the surface accelera-tion and the damage of such facilities were estimated through the estimation of acceleration am-plitude during earthquakes. In this study, then, the correlations between the damage index andthe intensity of ground motion are examined to find the result that the damage is governed bythe ground velocity rather than acceleration amplitude.The velocity response is determined from the average response spectra which were calculatedfrom 277 components of the past strong motion accelerograms. The distributions of responseamplitude and the physical properties of the ground around the averages are taken into accountin the response analyses.The damage potential of water system in Osaka is estimated by appling the regression formulabetween the damage index and the vclocity amplitude.