Effect of Structural Details of Beam-to-column Joint in RC Viaducts on Capacity

RC beam-to-column joints in railway viaducts are designed to satisfy structural details. However, when overcrowded reinforcement arrangement measures are implemented at joints or high strength rebars are applied to members, a relationship between details of reinforcement arrangement and capacity of joint is required. In this study, we carried out cyclic loading tests and 3D FEM analyses to clarify this relationship. The results show that as the inside radius of the bend of longitudinal rebars decreases, the capacity of a joint decreases due to the reduction of compressive strut width, and that the ties in the joint have little effect on the capacity, although it increases the deformation performance.