Seven　pinned　double-rectangular　tube　assembled　buckling-restrained　brace　(DRT-ABRB)　specimens　are　investigated　by　axial　cyclic　loading　tests　in　this　study.　The　core　member　of　the　specimen　is　a　single　flat-plate,　with　two　rectangular　tubes　assembled,　to　form　the　external　restraining　member　by　high-strength　bolts.　Each　rectangular　tube　is　composed　of　external　channel　steel　and　an　external　cover　plate.　The　influence　of　end　detailing　of　DRT-ABRBs　on　the　energy　dissipation　is　explored　in　the　tests,　which　demonstrates　that,　compared　with　the　end　strengthening　measure　using　an　external　hoop,　the　counterpart　with　a　bench　ribbed　stiffener　provides　better　energy　dissipation　capacity.　In　addition,　the　gap　between　the　bench　ribbed　stiffener　and　the　external　channel　steel　should　be　controlled　in　design.　All　DRT-ABRBs　studied　exhibits　excellent　energy　dissipation　capacity,　which　proves　the　effectiveness　of　the　DRT-ABRB　end　detailing　proposed.　(C)　2017　Elsevier　Ltd.　All　rights　reserved.