This　paper　presents　an　experimental　study　on　the　compressive　behavior　of　hybrid　fiber　reinforced　polymer　(FRP)-concrete-steel　double-skin　tubular　stub　columns　(DSTSCs)　with　recycled　aggregate　concrete　(RAC)　and　a　polyethylene　terephthalate　(PET)　FRP　jacket.　RAC　is　a　green,　sustainable　alternative　to　natural　aggregate　concrete　(NAC),　while　its　mechanical　properties　are　generally　inferior　to　NAC.　Polyethylene　terephthalate　(PET)　FRP　is　manufactured　from　recycled　plastics　and　has　a　large　rupture　strain　(LRS)　value　of　more　than　7%　compared　to　pure　polyethylene　FRP.　In　this　study,　a　total　of　20　DSTSC　specimens　were　tested　under　axial　compression.　The　main　parameters　studied　were　the　RAC　replacement　percent　(0,　50　and　100%),　the　FRP　jacket　thickness,　and　steel　tube　thicknesses　(3　and　5　mm).　Test　results　indicated　that　the　compressive　behavior　of　DSTSC　specimens　with　RAC　and　PET　FRP　is　similar　to　that　of　specimens　with　NAC　and　PET　FRP,　and　both　types　of　columns　exhibit　highly　ductile　compressive　behavior.　It　is　also　observed　that　the　compressive　behavior　of　DSTSCs　is　primarily　influenced　by　the　confinement　stiffness　of　the　FRP　jacket　and　the　steel　tube,　and　the　replacement　percent　of　RAC　has　marginal　effect.　The　increase　of　the　FRP　jacket　or　steel　tube　stiffness　can　counterbalance　the　replacement　percent　effect　of　RAC　on　the　axial　compressive　behavior　of　DSTSCs.　Finally,　the　suitability　of　the　existing　ultimate　condition　models　of　different　types　of　DSTSCs　was　investigated　based　on　the　experimental　results　of　this　study.　©　2022　Elsevier　Ltd