An experimental study on the effect of flexural strengthening with steel plate considering initial strain in reinforcement concrete beams

초기변형률을 고려한 철근콘크리트의 보의 강판휨보강 효과에 관한 실험적 연구

When RC beams are strengthened for flexure with steel plate, reinforced member has initial strain due to the dead load and is subject to partial damage. Strain of steel strengthening is zero at initial state. The effect of strengthening flexural member might be influenced by the quantity of initial strain. In this study, when He beams are strengthened for flexure with steel plate, its behavior is experimentally compared for the reinforcement efficiency of members due to the existence of different levels of initial strain. It is confirmed that reinforcement efficiency varies depending on the difference of initial strain.