To　study　the　seismic　strengthening　of　damaged　reinforced　concrete　(RC)　frames　using　CFRP　sheets,　this　study　designed　and　tested　the　scaled　2-bay　and　2-storey　RC　frame　specimens.　After　applying　a　low　cyclic　horizontal　load　to　simulate　the　initial　damage　to　the　specimen　in　an　earthquake　disaster,　CFRP　was　used　to　strengthen　the　joints　of　the　damaged　RC　frame.　Pseudo-static　tests　of　strengthened　specimens　and　counterpart　specimens　were　then　carried　out.　Seismic　performance,　including　stiffness,　load　capacity,　ductility　and　energy　dissipation　were　further　analyzed.　The　failure　mode　of　strengthened　RC　frame　structures　showed　excellent　ductility.　The　results　demonstrated　that　the　strengthening　method　involving　wrapping　CFRP　can　significantly　improve　the　maximum　horizontal　bearing　capacity,　initial　stiffness　and　energy　dissipation　capacity　of　the　non-ductile　reinforced　concrete　frame　structure.　The　average　displacement　ductility　coefficient　of　strengthened　specimen　can　be　enhanced　to　3.41　compared　with　that　of　counterpart　specimen　(3.00).　The　pushover　analysis　based　on　the　OpenSees　model　determined　that　the　prototype　frame　with　CFRP　strengthening　can　maintain　structural　integrity　and　safety,　with　its　maximum　interstorey　displacement　angle　below　the　limit　of　seismic　specification　(i.e.,　1/50　in　a　severe　earthquake).　This　study　can　contribute　to　the　development　of　practical　and　efficient　methods　for　restoring　and　improving　the　performance　of　damaged　RC　frames　in　seismic-prone　regions.