Abstract: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.