When steel members are corroded, both static and dynamic load carrying capacities are damaged. Static load carrying capacity is easily evaluated because it is only effected by the minimum cross sectional area. However, dynamic load carrying capacity is not easily evaluated because it is effected by distribution of stress and the distribution of stress is not easy to measure. To prevent fracture, it is important to investigate highly stressed region when corrosion occur. In this study, a simple evaluation method for stress concentration factor directly from corroded surface to simply evaluate dynamic load carrying capacity.

Abstract
 1. 서 론
 2. 해석절차
 3. 해석결과 및 고찰
 4. 결 론
 참고문헌

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