A　novel　endplate　bolted　rigid　joint　is　proposed　in　this　study　for　connecting　circular　concrete-filled　steel　tube　(CCFT)　columns　to　wide-flange　(WF)　steel　beams.　The　seismic　performance　and　potential　failure　mechanisms　of　the　proposed　joint　were　investigated　through　quasi-static　cyclic　tests　and　finite　element　(FE)　simulations.　This　study　aims　to　address　several　engineering　challenges　commonly　observed　in　existing　joint　configurations,　including　an　irrational　force-resisting　mechanism,　complicated　detailing　and　installation,　on-site　construction　difficulties,　constraints　on　beam　size,　and　limited　repairability.　By　optimizing　the　force　transfer　path,　the　new　joint　effectively　reduces　the　number　of　critical　tension　welds,　thereby　enhancing　the　ductility　and　reliability.　The　experimental　results　indicate　that　the　joint　exhibits　adequate　flexural　strength,　stiffness,　and　ductility,　with　stable　moment–rotation　hysteresis　loops　under　cyclic　loading.　Moreover,　full　restoration　of　the　joint　can　be　achieved　by　replacing　only　the　steel　beam　and　endplate,　facilitating　post-earthquake　repair.　FE　analysis　reveals　that,　under　the　ultimate　bending　moment　at　the　beam　end,　multiple　through　cracks　develop　in　the　high-strength　grout—which　serves　as　a　key　load-transferring　component—and　significant　debonding　occurs　between　the　grout　and　the　surrounding　steel　members.　However,　due　to　confinement　from　adjacent　components,　these　internal　cracks　do　not　compromise　the　overall　strength　and　stiffness　of　the　joint.　This　research　provides　an　efficient　and　practical　connection　solution,　along　with　valuable　experimental　insights,　for　the　application　of　CCFT　columns　in　moment-resisting　frames　located　in　high　seismic　zones.　©　2025　by　the　authors.