A　pseudo-dynamic　test　of　two　1/11.　6-scalcd　concrete-filled　steel　tube　(CFST)-reinforced　concrete　(CFSTRC)　column　with　hollow　box　sections　was　performed　to　study　the　influence　of　the　ground　motion　characteristics,　ground　motion　intensity,　mainshocks　and　aftershocks　on　the　seismic　performance　of　the　CFSTRC　columns.　The　results　show　that　the　CFSTRC　column　specimens　completely　function　in　the　elastic　state　under　the　action　of　10　strong　earthquakes　with　the　peak　ground　acceleration　(PGA)　modulated　proportionally　to　0.　05g,　and　the　maximum　displacement　response　under　the　action　of　the　JRT　ground　motions　of　the　Great　Hanshin　Earthquake　in　Japan　was　1.　68　times　the　average　value.　Under　the　action　of　the　9-dcgrcc　rare　mainshocks　(PGA^O.　7g),　specimen　SI　entered　the　strength　deterioration　stage,　whereas　specimen　S2　was　still　in　the　elastoplastic　deformation　stage.　The　failure　modes　of　the　two　specimens　were　both　shear　diagonal　cracks　in　the　web　along　the　loading　direction,　horizontal　cracks　in　the　web　perpendicular　to　the　loading　direction,　and　the　vertical　cracks　in　the　outer　concrete　caused　by　the　local　buckling　of　the　steel　tube　at　the　column　bottom,　resulting　in　a　significant　decrease　in　the　structural　stiffness.　As　the　PGA　of　the　aftershock　increased　step　by　step,　the　maximum　displacement　response　of　the　damaged　specimen　in　the　mainshock　increased　linearly,　and　the　cumulative　hysteretic　energy　dissipation　increased　nonlinearly.　Under　the　action　of　aftershocks　with　the　same　PGA　as　the　mainshocks,　the　cumulative　damage　to　the　two　specimens　was　further　exacerbated,　the　horizontal　strength　decreased　by　about　17%　on　average,　the　cumulative　hysteretic　energy　dissipation　decreased　by　about　16%,　and　the　maximum　displacement　response　on　the　column　top　increased　by　about　3%.　Finally,　the　seismic　damage　index　based　on　the　linear　combination　of　maximum　structural　deformation　and　cumulative　hysteretic　energy　dissipation　can　be　used　to　accurately　evaluate　the　seismic　performance　of　CFSTRC　columns　under　the　action　of　mainshock　and　aftershocks.　©　2022　Xi＇an　Highway　University.　All　rights　reserved.