2017 Volume 27 Issue 4 Pages 254-264
Normalized Input-Output Minimization (NIOM) analysis was conducted for the long-term earthquake observation records at Tokuyama Dam in Gifu prefecture, Japan operated by the Japan Water Agency, and the propagation times of the seismic waves and the dynamic soil properties in the dam body were investigated. The results revealed that (1) the propagation time in the upper part of the dam body increased with an increase in the reservoir water level during the test impoundment, and decreased with elapsed time after the test impoundment, whereas (2) the propagation time in the lower part of the dam body decreased monotonically and independently of the reservoir water level, and (3) almost no degradation of the dam body was found during the analyzed period in this study.
