The　accuracy　of　existing　compressive　strength　models　for　fiber-reinforced　polymer　(FRP)-confined　concrete　might　vary　significantly　since　most　of　them　were　established　empirically,　without　a　clear　understanding　of　the　confinement　mechanisms.　Previous　studies　have　suggested　that　the　compressive　behavior　of　confined　concrete　depends　on　its　confining　stress　path.　However,　the　confining　stress　path　of　FRP-confined　concrete　and　its　corresponding　effect　on　the　behavior　of　FRP-confined　concrete　has　not　been　investigated,　to　the　best　of　the　authors＇　knowledge.　In　this　paper,　the　confinement　mechanism　of　FRP-confined　concrete　will　be　investigated　for　the　first　time　by　investigating　the　confining　stress　path　and　the　relationship　between　the　confining　stress　path　and　the　compressive　strength　of　FRP-confined　concrete.　The　results　indicate　that　the　FRP-confined　concrete　that　has　different　column　parameters　generally　yields　different　confining　stress　paths,　which　leads　to　different　compressive　strengths.　The　influence　of　the　confining　stress　paths　on　the　compressive　strength　was　observed　to　be　less　significant　for　the　specimen　that　was　confined　by　a　stress　path　with　a　larger　lateral　stress　dominant　index.　Based　on　the　theoretical　and　experimental　results　of　this　paper,　a　confining　stress　path-based　compressive　strength　model　will　be　developed　for　FRP-confined　concrete.　The　developed　model　yielded　more　accurate　predictions　than　existing　models　based　on　the　results　of　this　paper　and　previous　tests.