Abstract

The seismic response under vertical excitation of the large-sized, multi-walled coaxial cylindrical tank filled with liquid is investigated theoretically. In this paper, the bulging motion which occurs in the relatively high frequency region due to the flexibility of the shell is analyzed by means of the finite element method. The natural frequency, the time history of the displacement response of the shell and the dynamic pressure response of the liquid are derived by the modal analysis approach.

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