VIBRATION EXPERIMENTS ON THE BULGING VIBRATION OF REAL SCALE WATER TANK

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  • 実機貯水槽を用いてのバルジング振動に関する振動実験

Abstract

 The damage investigation of the water tank of the Great East Japan Earthquake and the Kumamoto earthquake, cases of the side plates and the corner portion of the lower side is damaged from the case and the center where the ceiling and the upper part of the side plate was damaged was observed. The former is caused by the sloshing vibration, the latter is caused by bulging vibration. In this study, using the FRP panel water tank of 3m × 3m × 3m, it was verified for the bulging vibration. As a result, than the change of displacement and pressure of the wall, to confirm the range of the generated frequency of bulging. Bulging is quickly vibrate vibration is completed it was confirmed that convergence. Bulging is to generate a large pressure at the bottom of the tank, this is the cause of the damage to the tank.

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