抄録
RC buildings with piles had been expected to be resistant to tsunamis. However, pile-supported RC buildings were pulled up and toppled by the 2011 Off the Pacific Coast of Tohoku Earthquake Tsunami. Damage mechanism of the pile-supported RC buildings due to tsunami has to be found out for tsunami evacuation countermeasures with tsunami evacuation buildings. In this study, we focus on one of the pile-supported RC buildings in Onagawa town, Miyagi Prefecture that was pulled up, toppled and moved during the 2011 tsunami and find out its damage mechanism by using tsunami inundation simulation and tsunami response analysis. As a result it was shown that liquefaction by ground motion and reinforcement of ground surface by Tsunami made shear failure in the piles and after that the building topped and moved by Tsunami.
