Many of the river gates, including steel flap gate, were constructed during the period of rapid economic growth, and more than half of them are now 40 years old. Therefore, more efficient maintenance and management plans are needed. In this study, loading test using experimental model and FEM structural analysis were conducted on steel flap gate. Assuming several types of deterioration and damage conditions, the displacement and stress of the steel flap gate were compared by loading tests using experimental models and FEM analysis. And, by comparing the experimental and analytical results, the effects of deterioration damage due to aging on the soundness of steel flap gate were investigated.
