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

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

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.