Three　groups　of　36　grouted　sleeve　connectors　(GSCs)　with　different　grouting　compactness　were　experimentally　investigated　under　monotonic　tension　and　large-deformation　reciprocating　tension-compression.　The　experimental　results　showed　that　the　failure　mode　contained　the　tensile　fracture　of　the　steel　bar　(Failure　Mode　I)　and　bond-slip　failure　(Failure　Mode　II).　The　yield　strength,　ultimate　strength,　and　elongation　of　GSCs　gradually　decreased,　while　the　residual　deformation　increased　as　the　grouting　compactness　decreased.　The　average　ultimate　strength　of　GSCs　with　90　%　grouting　compactness　was　561.61　MPa,　a　124.46　%　enhancement　over　that　of　GSCs　with　60　%　grouting　compactness.　The　loading　method　mainly　affected　the　residual　deformation　of　GSCs,　which　increased　with　the　cycle　number　of　large-deformation　reciprocating　loadings　at　consistent　grouting　compactness.　Subsequently,　based　on　the　effects　of　the　grouting　compactness　and　large　deformation　on　the　mechanical　performance　of　GSCs,　this　study　combined　the　critical　grouting　compactness　and　fu/fsy　to　judge　the　failure　mode　of　GSCs　with　steel　bar　diameters　of　20　cm,　which　were　determined　to　be　90　%　and　1.4,　respectively.　These　findings　provide　a　foundation　for　designing　assembled　structural　connections　and　ensuring　the　safety　of　assembled　structures.　©　2024　The　Authors