Abstarct: Abstract Deficiencies in the beam-column connections of old reinforced concrete (RC) frxames substantially increase the vulnerability of external connections during an earthquake. One approach to improving the performance of deficient connections in prior investigations was joint enlargement. The use of the joint enlargement technique, due to the shortening of the deformable length of the beam, requires controlling the shear of adjacent members. Two practical combination retrofitting techniques, which include prestressed steel angles and Carbon fiber reinforced polymers (CFRP) sheets, were experimentally examined to solve the shear problems of the joint enlargement technique in non-seismic specimens. Five beam-column connections, involving two control specimens and three retrofitted specimens at 1/2 scale, were tested with a constant axial force and a cyclic load with increasing amplitude. All five specimens were compared baxsed on seismic parameters including ductility factor, energy dissipation, equivalent hysteretic damping, stiffness degradation, crack patterns, and hysteresis curves. The results showed that Retrofit techniques resulted in the relocation of the plastic hinge from the connection area to the end of the beam. The combination of retrofitting methods, including prestressed angles and CFRP sheets, significantly increased the load-bearing capacity, ductility, energy dissipation, and initial stiffness of the retrofit specimens in comparison to the non-seismic control specimens..