A Study on the Shear Fatigue Damage Behavior of the Reinforced Concrete Beams Subject to Repeated Loading Using the Strut-Tie Model

스트럿-타일 모델을 이용한 반복하중을 받는 철근 콘크리트 보의 전단피로손상거동에 관한 연구

This paper represents the investigation of the shear fatigue behavior and damage procedure of reinforced concrete beams subject to repeated loading using the strut-tie model. Damage Index is defined as the ratio of deflection at each cycle to the ultimate deflection of inelastic region. Two types of strut-tie model are designed according to the inclined angles of concrete-struts and the consideration of concrete-ties. In one model, aggregate interlock and resistance of uncracked concrete are regarded as the main sheat resisting mechanism and in the other, stirrup is. The results show that the strut-tie model combined with damage index can describe the shear fatigue behavior of RC beams subject to repeated loading effectively.