Abstract
The damage of 39 bridges by tsunami due to Great East Japan Earthquake was evaluated with the application of β value (ratio to girder resistance and acting force of the tsunami) focusing on the girder shape. As a result, β is an effective parameter to evaluate outflow condition of girder. Besides, it have shown that width, and height of girder affected β value significantly. Furthermore, based on the tsunami velocity that represented the characteristics of tsunami in the area got from video analysis, the conformity between β value and outflow condition was improved.
