The　ultra-high　performance　concrete　(UHPC)　confined　by　fiber　reinforced　polymer　(FRP)　tube　is　a　novel　hybrid　system　with　superior　performance.Four　unconfined　UHPC　cylindrical　specimens　and　thirty-six　FRP-confined　UHPC　specimens　with　four　different　types　of　fibers　and　three　different　tube　thicknesses　were　tested　under　monotonic　uniaxial　compression.The　influence　of　FRP　tube　types　and　thickness　on　the　compressive　behavior　of　confined　UHPC　was　discussed.The　FRP　tube　confinement　was　shown　to　significantly　enhance　both　the　ultimate　strength　and　strain.The　dilation　rate　of　confined　UHPC　specimens　equals　to　the　Poisson＇s　ratio　of　unconfined　specimens　at　first.Once　the　FRP　confinement　becomes　fully　activated,the　rate　deduces　to　an　asymptotic　value　that　was　larger　than　the　value　of　conventional　concrete.The　test　results　were　compared　with　a　number　of　typical　confinement　models.A　new　stress-strain　model　was　proposed　based　on　the　test　results.Comparison　of　the　models　showed　that　the　new　model　provides　the　most　accurate　prediction　of　the　ultimate　condition　and　the　stress-strain　behavior　of　FRP-confined　UHPC　specimens.　©　2016,　The　Editorial　Board　of　Journal　of　Basic　Science　and　Engineering.　All　right　reserved.