To　quantitatively　study　the　flexural　performance　of　the　disconnectable　coupling　joint　with　steel　wedges　(DCJS),　the　validated　finite　element　model　was　established　based　on　the　test　results　of　the　DCJSs.　Subsequently　a　series　of　finite　element　models　were　used　to　systematically　study　the　deformation　and　force　mechanism　of　the　DCJS　under　eccentric　load.　The　flexural　performance　of　the　DCJDs　was　analyzed　through　the　parameterization　method.　Based　on　the　outcomes　of　the　parametric　study,　the　moment-rotation　model　was　established　for　DCJS.　Results　show　that　the　flexural　performance　of　the　DCJS　decreases　with　the　increase　of　eccentricity,　wedge　height　and　midrib　height,　and　increases　with　the　increase　of　wedge　length,　wedge　width,　channel　thickness　and　tube　wall　thickness.　Meanwhile,　the　moment-angle　curve,　initial　flexural　stiffness　and　plastic　flexural　capacity　of　the　DCJS　can　be　accurately　predicted　by　the　moment-rotation　model.　©　2025　Beijing　University　of　Technology.　All　rights　reserved.