To　investigate　the　shear　behaviour　of　CFRP-concrete　with　surface　groove　subjected　to　chloride　wet-dry　cycles,　single-lap　tensile　shear　tests　with　different　groove　shapes　(rectanglular,　trapezoidal　and　inverted　trapezoidal)　were　carried　out　for　0　d,　60　d　and　120　d　wet-dry　cycles.　The　changes　in　failure　mode,　fracture　engergy　and　factors　influencing　the　maximum　shear　stress　were　examined.　On　the　basis　of　experimental　results,　we　derived　the　bond　slip　constitutive　model　considering　dry-wet　cycles　and　its　effectiveness　was　validated　through　numerical　simulations.　The　results　show　that　the　failure　mode　of　the　surface　groove　method　transitions　from　the　CFRP　sheet　fracture　without　erosion　to　the　mixed　failure　and　debonding　failure　of　the　CFRP　sheet.　Compared　with　EBR　specimens,　the　interface　fracture　energy　of　120　d　wet-dry　cycles　reduces　by　60.04%　-　69.42%　.　The　maximum　shear　stress　of　the　trapezoidal　groove　after　120　d　wet-dry　cycles　is　increased　by　7.18%　-　9.48%　compared　with　other　surface-grooved　shapes.　These　results　indicate　that　the　surface　groove　method　exhibits　superior　shear　behaviour　under　wet-dry　cycles.　The　developed　deterioration　formula　of　the　interface　constitutive　relationship　is　applicable　for　analyzing　and　simulating　the　interfacial　bond　behaviour　of　CFRP　-　concrete　with　surface　groove　under　wet-dry　cycles.　©　2024　Harbin　Institute　of　Technology.　All　rights　reserved.