[2110] Performance Evaluation of Horizontal Loop Joints in Precast Concrete Beams using RBSM
Keywords:3D-RBSM、Horizontal Loop joints、Inner reinforcing bars in loop、Precast concrete beam
In loop rebar joints, the bond stress of straight portions and bearing pressure of curved portions can be utilized effectively, the joint length can be shortened compared with the conventional lap joint. From such an advantage, adoption of cast in situ loop rebar joints is increasing. The performance evaluation of loop joints has been studied under various specifications and conditions according to various structural conditions of the site, although there are many researches on loop joints arranged vertically to beams or slab members. The horizontal loop joints are also useful depending on construction conditions, however, they have not been investigated sufficiently yet, and the failure mechanism is unknown. In this study, the failure mechanism of the precast beam using the horizontal loop joints and the influence of the reinforcing bars inside the loop were investigated by experiments and numerical simulations.