P-M 상관도를 이용한 축하중과 폭발하중을 동시에 받는 철근 콘크리트 기둥의 손상도 평가

In this paper, the damage contour of reinforced concrete columns under blast load was compared with its P-M interaction diagram to evaluate the simplified analysis for blast resisting performance of reinforced concrete column. Autodyn which was specialized for analysis of explosion and impact was used to simulate the structural behavior of the columns under combined effect due to axial and blast loading. The weight of explosive is fixed on most threatening weight, 20kg, and distance of explosive is varied from 1m to 5m. According to the analysis, the damage contour of reinforced concrete column showed very similar shape to P-M interaction diagram as its axial load and blast induced additional bending moment changes. Therefore, the damage and failure behavior of reinforced concrete column can be predicted from damage contour on P-M interaction diagram.