Post-earthquake　investigations　show　that　bridges　with　double/multi-columns　could　suffer　serious　damage　characterized　as　significant　residual　deformation.　To　improve　the　seismic　resilience　of　the　double-column　bridge　bent　under　strong　earthquakes,　a　novel　self-centering　energy　dissipation　brace　composed　of　deformation-amplified　shape　memory　alloy　wires　and　a　friction　device　(DASMAFD)　is　employed　to　retrofit　the　bridge　bent.　Employing　the　lateral　deformation　as　the　damage　index,　the　direct　displacement-based　design　procedure　of　bridge　bents　retrofitted　with　DASMAFDs　is　proposed　and　then　examined　by　elastic-plastic　time　history　analysis.　To　assess　the　seismic　performance　of　the　retrofitted　bridge　bent　under　earthquakes　with　different　intensities,　the　fragility　analysis　of　the　retrofitted　bridge　bent　under　near-fault　and　far-field　ground　motions　is　conducted.　For　comparison,　the　bridge　bents　with　shape　memory　alloy-friction　damper　(SMAFD)　and　displacement-amplified　shape　memory　alloy　damper　(DASMAD)　are　also　investigated.　Meanwhile,　the　ratio　of　residual　displacement　to　peak　displacement　is　defined　as　the　residual　displacement　factor　and　used　to　assess　the　self-centering　function　of　bridge　bents.　The　results　show　that　the　double-column　bridge　bent　retrofitted　with　DASMAFDs　has　significant　seismic　resilience　characterized　as　the　lowest　vulnerability　and　insignificant　residual　deformation　under　earthquakes　with　different　intensities.　©　2025　Institution　of　Structural　Engineers