Behavior and Damage of Dams Under the 1993 Big Earthquakes in Japan

By analyses of the acceleration records at dams during the two big earthquakes which hit in Hokkaido of Japan in 1993, the maximum acceleration at damsite rock, the maximum acceleration amplification ratios at crest and the natural periods of dam bodies were evaluated and were compared the results with empirical equations. Damage to the dams was described, and the mechanism of the deformations was examined