ANALYTICAL INVESTIGATION OF SLAB BRIDGE DAMAGES CAUSED BY TSUNAMI FLOW

Keisuke Murakami, Yoshiko Sakamoto, Tetsuya Nonaka

Abstract


Tsunami caused by Tohoku earthquake in 2011 had brought fatal damages on many kinds of infrastructures such as ports, roads, bridges, lifelines and other important structures. Among those damages, we have found many bridges whose superstructure was flooded away by tsunami flow. This study proposes a composite simulation method in order to investigate the damage on bridges caused by tsunami action. The numerical method consists of a hydraulic analysis and a structural one. The proposed method is applied to the damaged bridge whose superstructure was flooded away by Tohoku earthquake tsunami. Based on the structural analysis, this study discusses the mechanism of damage  caused by tsunami flow. Furthermore, this study confirms the validity of hydraulic analysis through physical experiment.

Keywords


damage of bridge; Cadmas-Surf; EERC/Fiber

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