To　achieve　a　damage-controllable　and　earthquake-resilient　steel　frame　with　more　feasible　and　simple　dissipative　devices,　an　innovative　steel　moment-resisting　connection　with　bolted　ductile　double　T-stub　fuses　is　developed　in　this　work.　These　T-stubs　with　appropriate　free　deformation　length　in　the　stems,　made　of　Low-Yield-Point　(LYP)　steels　instead　of　ordinary　steels,　simultaneously　behave　as　connectors,　bearing　elements,　and　replaceable　dissipative　fuses　that　benefit　from　the　inherent　excellent　ductility,　dissipation　capacity,　and　fatigue　performance　of　the　LYP　materials.　The　cyclic　responses　of　the　connections　with　LYP　T-stubs　subjected　to　different　weakening　strategies　are　explored　and　compared　via　extensive　nonlinear　numerical　parametric　analyses.　Subsequently,　the　influences　of　the　free　deformation　length　and　the　weakened　degree　of　the　T-stub　stem　on　the　seismic　performance　and　the　structural　fuse　effect　are　evaluated.　Finally,　optimal　design　suggestions　for　this　connection　are　proposed,　which　provide　a　reference　for　engineering　applications.　Analytical　results　demonstrate　that　properly　designed　LYP　T-stubs　with　various　weakened　parameters　can　act　as　structural　fuses　by　dissipating　more　than　90%　of　the　system　energy　and　concentrating　most　of　the　plasticity　and　damage,　which　effectively　protect　the　main　structural　members　from　damage　while　being　subjected　to　seismic　excitations.　Besides,　due　to　low　yield　strengths,　to　achieve　an　identical　weakened　degree,　the　T-stubs　made　of　LYP　steels　are　stockier　than　the　ones　made　of　traditional　or　high-strength　steels.　This　feature　is　able　to　avoid　serious　local　buckling　of　stem　plates　and　significant　strength　degradation,　thus　is　conducive　to　the　improvement　of　the　ductility.　By　comprehensively　considering　the　construction　advantages,　ductility,　dissipation　capacity,　structural　fuse　performance,　and　material　efficiency,　LYP　T-stub　with　a　relatively　thin　stem　is　a　more　promising　solution.　The　method　of　increasing　the　free　deformation　length　of　the　stem　effectively　controls　the　damage　within　the　LYP　T-stubs,　adequately　improves　the　effect　of　structural　fuses,　and　further　lowers　the　required　weakened　degree;　thus,　the　protection　of　primary　frame　members　is　achieved　without　excessively　reducing　the　strength　of　the　connection.　Nevertheless,　the　T-stub　fuses　with　overly-large　free　deformation　lengths　and　thin　stem　plates　tend　to　buckle　substantially,　resulting　in　significant　strength　deterioration　that　adversely　decreases　the　ductility　of　the　connections.　As　a　result,　an　optimal　solution　with　a　satisfactory　weakened　degree　and　an　appropriate　free　deformation　length　(αd　=　0.8　and　le　=　1.0　bts)　is　suggested　as　a　good　compromise　among　the　material　efficiency,　dissipation　and　ductility　capacities,　and　structural　fuse　performance.　©　2020　Elsevier　Ltd