Abstract
The giant earthquake of Mw=9.3 and the induced tsunami in December 26, 2004 caused the catastrophic damage of infrastructures such as coastal structures, utilities and transportation facilities. In this study, the hydraulic experiments were carried out to clarify a tsunami wave load to a bridge deck, focusing on the clarification of the dependence of the bridge deck lateral movement on a wave height induced by a tsunami. Maximum ratio of the drag force to the deck weight becomes 0.43 to 0.44, that means the boundary lateral load by which deck movement occurs.
