STABILITY OF A SHELTER TOWER AT EXERTION OF TSUNAMI

摘要

To save lives of residents in affected coastal areas from the tsunami, the shelter tower is newly designed, and it begins to be constructed by the Japanese local governments. The hydraulic experiment is performed to check the stability of the shelter tower at exertion of tsunami. It is confirmed that if there are no debris, tower is enough stable because the tsunami force is smaller than the shear strength of the column connections. On the other hand, if the force is increased by debris, overturning moment becomes much larger than the resistant moment by the tower weight without considering the pullout resistance force of the columns. Presuming the tsunami force which acted on the land structure such as the tsunami shelter became possible by using the newly derived tsunami velocity equation and the estimated drag coefficient.