This　paper　presents　an　experimental　and　numerical　study　of　concrete-filled　steel　tubular　stub　columns　strengthened　with　fibre　reinforced　polymer　(FRP)　wraps　under　axial　compression.　Twenty　specimens　were　tested　to　investigate　the　effects　of　steel　tube　shape,　number　of　FRP　layers　and　steel　ratio　on　the　performance　of　the　composite　columns.　The　test　results　indicated　that　the　FRP　jackets　could　enhance　the　load-bearing　capacity　for　the　circular　columns　effectively,　whereas　the　enhancement　was　less　significant　for　square　columns.　Nonlinear　analysis　is　performed　using　ABAQUS　software,　and　reasonable　agreement　is　achieved　between　the　predicted　and　test　results.　The　mechanisms　of　FRP　and　steel　tube　confinement　on　the　column　behaviour　are　then　investigated　using　this　modelling.　©　2009　Faculty　of　Construction　and　Land　Use,　The　Hong　Kong　Polytechnic　University.