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Sloshing of liquid in oil storage tanks at Tomakomai in Hokkaido, due to the 1983 Japan Sea Earthquake

Shinsaku Zama

Report of Fire Research Institute of Japan

Sayı: 60, 1-10, 1985/09

The 1983 Japan Sea Earthquake provided us with a good chance to work out the problem whether the current theories associated with the liquid sloshing were useful to the huge oil storage tanks, or not. As far as the author knows, this earthquake was the first one with provided a lot of data of sloshing wave height of huge oil tanks.

In this paper, a method for the dynamic response analysis of oil storage tank under two-dimensional excitations is presented and applied to the real one to compare with the sloshing data obtained at Tomakomai. As for the input motion, we utilized the JMA strong motion record with is pertinent to estimate the long-period ground motion.

The numerical results are in good agreement with the observations in respect to the maximum wave height and the predominant direction of sloshing. This proves that the exact estimation for long-period ground motion is very important, and that the extended method for the two-dimensional dynamic response analysis is useful in understanding the liquid sloshing in the cylindrical oil storage tanks. Furthermore, it is necessary to clarify the regionality of the long-period ground motion, mainly due to the deep soil structure at the site, in order to enhance the safety of oil storage tanks to the future earthquakes.

Fire Research Institute of Japan

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