Yielding dampers, as energy dissipation devices, can be installed within structural connections to dissipate a significant portion of the seismic input energy, thereby reducing the forces transmitted to the primary structural members. In this study, a new beam-to-column connection is proposed in which a replaceable yielding damper is employed. In the first stage, the experimental behavior of three connections equipped with O‑, U‑, and S‑shaped dampers was investigated. From the experimental hysteresis responses, seismic performance indices including maximum moment, elastic stiffness, ductility, cumulative absorbed energy, and equivalent damping ratio were extracted. Considering the superior performance of the connection equipped with the U‑shaped damper in the experiments, the numerical part of the study focused on this damper configuration. Accordingly, the effects of variations in the bend radius and thickness of the U‑shaped damper on the seismic characteristics of the connection were examined. In this phase, 16 numerical models were developed, incorporating four different values for the damper thickness and bend radius. Finally, the effect of changing the beam section on the results was also investigated, assuming that the distance between the damper and the rotational pin remained constant. Experimental results indicated that the U‑shaped damper, due to its specific geometry, provided the highest ductility and energy dissipation capacity among the tested specimens. In contrast, although the S‑shaped damper exhibited higher initial strength, its energy dissipation capacity was lower due to premature failure. Numerical analysis results further showed that increasing the damper thickness and reducing the bend radius led to increases in connection stiffness, ultimate moment, and cumulative energy dissipation, following a nonlinear trend. Moreover, the investigation of beam section variation indicated that, as long as the distance between the damper and the rotational pin remains constant, changing the beam section does not significantly affect the results.