A　gusset　joint　with　7　degrees　arch　angle　comprised　of　two　upper　and　lower　aluminium　alloy　joint　plates　and　four　Hshaped　aluminium　alloy　members　connected　by　Huck　bolts　is　first　designed　and　the　static　performance　experiment　is　carried　out　to　address　the　research　gap　regarding　the　static　performance　of　arched　aluminium　alloy　gusset　joints.　The　failure　modes　of　the　joint　are　summarized　in　terms　of　the　collapse　phenomena,　namely　the　local　buckling　of　the　web　and　the　bending　and　torsion　failure　of　the　member,　and　the　stress　distribution　is　discussed　based　on　the　measured　strain.　Subsequently,　the　ultimate　bearing　capacity　and　the　stiffness　in　different　stages　of　the　load-displacement　curve　are　obtained.　The　analysis　is　then　developed　via　finite　element　(FE)　models　implemented　in　the　non-linear　code　ABAQUS.　First,　via　comparison　with　the　experimental　results,　the　validity　of　the　FE　model　is　verified.　Furthermore,　according　to　the　simulation,　it　reveals　that　with　the　plasticity　development　of　bolt　hole　walls,　the　joint　gradually　reaches　the　ultimate　bearing　capacity　and　undergoes　the　obvious　deformation　utill　it　can　not　bear　the　load.　To　develop　further　understanding,　the　effects　of　different　arch　angles　on　the　bearing　capacity,　stiffness,　and　failure　modes　of　joints　are　investigated,　and　the　results　indicates　that　arch　angles　cannot　be　ignored.