지진해일에 의한 교량의 피해유형 분석

Abstract

Recently, there has been an increasing concern on Tsunami along the east coast of Korea, that would be initiated from undersea earthquakes at the west coast of Japan. However, the possible property loss caused by Tsunami has not been studied well and the counter-plans to reduce the possible property loss have not been established yet. Especially, there does not exist any counter-plan against damage of civil engineering structures that could induce high property loss. In this study, we analyze the damage patterns of bridge structures, which is one of the typical civil engineering structures. First, we investigate damage cases of the East Japan Tsunami in year 2011. The typical destruction mechanisms of bridges are summarized. Then, bridges in a target area chosen along the east coast of Korea are classified. Based on their basic characteristics, estimated damage patterns and criterions of damage levels are established. Finally, the resistance of several standard bridges against Tsunami are calculated depending on inundation depths and we develop a damage assessment table for bridges against Tsunami.