This　study　investigates　the　post-fire　axial　compression　behavior　of　concrete-filled　stainless　steel　tube　(CFSST)　stub　columns,　aiming　to　inform　strategies　for　strengthening　and　retrofitting　fire-damaged　CFSST　structures.　The　paper　reviews　the　mechanical　properties　and　fire　resistance　of　CFSST,　presenting　results　from　a　series　of　fire　and　axial　compression　tests　conducted　on　69　circular　CFSST　stub　columns.　Key　parameters　included　fire　exposure　conditions,　stainless　steel　tube　wall　thickness,　concrete　strength,　and　cooling　methods.　The　analysis　includes　the　failure　mode,　load-deformation　relationship,　ultimate　bearing　capacity,　initial　compressive　stiffness,　and　ductility　of　specimens　post-fire.　The　primary　post-fire　axial　compression　failure　mode　of　the　specimens　was　characterized　by　localized　buckling　uniformly　distributed　along　the　vertical　axis.　For　fire　durations　of　60　min　or　less,　the　ultimate　bearing　capacity　of　the　specimens　was　largely　restored　after　cooling,　with　a　bearing　capacity　loss　of　less　than　10　%.　Specimens　subjected　to　water　cooling　exhibited　lower　initial　compressive　stiffness　and　ultimate　bearing　capacity　compared　to　those　cooled　by　air.　Lastly,　a　formula　is　proposed　for　predicting　the　ultimate　bearing　capacity　of　CFSST　stub　columns　following　exposure　to　ISO　834　standard　fire　conditions.　©　2024