Abstract
In the 2011 Tohoku earthquake, many water tanks were destroyed in the Tohoku region. In addition, similar damages in the Kanto region are reported, that is far from the epicenter. It is considered that the damage was caused by the sloshing phenomenon occurred by long-period ground motion. Damages by sloshing occurred a lot in the past, but will also arise in near future. This research proposes a countermeasure device against sloshing, installs it in a small model and a real water tank, and proves its performance through experiments.
