Page - 11 - in Book of Full Papers - Symposium Hydro Engineering

COMMISSION INTERNATIONALE DES GRANDS BARRAGES ------- VINGT-SIXIÈME CONGRÈS DES GRANDS BARRAGES Autriche, juillet 2018 ------- COMPARISON OF MEASURED AND ANALIZED SEISMIC BEHAVIOR OF CONCRETE DAMS AND EMBANKMENT DAM IN JAPAN Hiroki SAKAMOTO Koishiwaragawa Dam Construction Office, JAPAN WATER AGENCY Hiroyuki SATO and Takashi SASAKI National Institute for Land and Infrastructure Management, MINISTRY OF LAND, INFRASTRUCTUR, TRANSPORT AND TOURISUM JAPAN 1. INTRODUCTION Many earthquakes have hit Japan and informative data about seismic behavior has recorded at dams during large earthquakes [1]. The report shows some examples of dynamic analyses of existing dams with efforts in order to reproduce seismic performances exactly. In this abstracts, outlines of an arch dam case and an embankment dam case are briefly explained. 2. CASE OF ARCH DAM [2] The earthquake record observed at the crest of Yagisawa Dam (dam height of 131m, Fig.1) in Chuetsu Earthquake (Oct.23, 2004) was 656cm/s2. In the reproduction analysis, modification of the foundation - reservoir coupling conditions has been conducted as compared with generally used conditions in Japan. By using the modified analysis, reproduced behavior of the dam in the earthquake has higher precision than previous method as shown in Fig. 2. 11