In order to study the seismic performance of the extended-end-plate connecting joint in between T-shaped concrete-filled rectangular composite tubular column and reinforced concrete beam, nine specimens have been designed and manufactured in the proportion of 1:2 and tested under low-cycle repetitive loadings. Based on tests process and results, the deformation process of specimens under load was observed, hysteresis curve and skeleton curve were described, and the load characteristics, ductility, energy dissipation and stiffness degradation of the joints were analyzed. Results also show that this type of joints have plumper hysteretic curve with ductility coefficient greater than 3.48 and viscous damping coefficient greater than 1.5, which indicate excellent seismic performance. With extended length of corbels, initial stiffness and ultimate load of the joints can be improved; with thickened end-plate and stiffeners, ultimate load and energy dissipation of the joints can be increased, where adding stiffeners can improve thin end-plate joints more significantly than thick end-plate joints; with increased diameter of the bolt, initial stiffness of the joints can be improved, but it only affects its loading capacity within limits.
