This　paper　introduces　simplified　design　methods　for　calculating　the　load　bearing　capacity　of　axially　loaded　concrete-filled　carbon　steel　tubular　(CFST)　stub　columns　and　concrete-filled　stainless　steel　tubular　(CFSST)　stub　columns.　Refined　finite　element　(FE)　models　are　developed　for　capturing　the　fire　performance　of　CFST　and　CFSST　stub　columns　under　ISO　834　fire.　The　accuracy　of　proposed　FE　models　is　validated　by　comparing　with　existing　test　data.　By　using　the　new　developed　FE　models,　the　design　equations　suggested　in　Eurocode　4　for　calculating　the　axial　load　bearing　capacity　of　CFST　and　CFSST　stub　column　in　fire　are　evaluated.　It　is　found　that　the　Eurocode　4　generally　provide　an　unsafe　prediction　due　to　the　influence　of　unsuitable　consideration　on　thermal　expansion　and　adopted　material　strength　values.　In　order　to　improve　the　equations　in　Eurocode　4,　correction　factorsk(c)andk(s)for　the　concrete　core　and　steel　tube　are　defined　and　calibrated　based　on　comprehensive　parametric　analysis,　and　refined　equations　for　predicting　the　axial　load　bearing　capacity　of　CFST　and　CFSST　stub　columns　in　fire　are　suggested.　Finally,　a　design　example　based　on　the　proposed　simplified　design　methods　is　demonstrated　in　this　paper.