DAMAGE OF WATER TANKS AND ITS RELATIONSHIP WITH STRONG GROUND MOTION IN BROAD AREAS DURING THE 2011 GREAT EAST JAPANESE EARTHQUAKE

Abstract

 As one of the activities of the Earthquake Engineering Committee of JSCE, through a questionnaire survey the authors investigated the damage of water tanks and elevated tanks in broad areas during the 2011 Great East Japan Earthquake and clarified the characteristics of the damage from the viewpoints of sloshing and bulging. Then through the comparison between the damage characteristics and the contour maps of the response spectra, using many strong ground motion records, they found that there is a very good correspondence between them, and that the damage of sloshing and bulging was verified due to the appearance of long-period and short-period earthquake response exceeding the maximum design values in the present seismic design regulations.