An　analytical　model　is　introduced　in　this　paper　to　predict　the　behavior　of　axially　loaded　circular　concrete　columns　confined　by　fiber　reinforced　polymer　(FRP)　composites.　This　model　is　based　on　the　confinement　model　introduced　by　Attard　and　Setunge　(1996)　for　actively　confined　concrete,　and　a　modified　model　developed　for　predicting　the　dilation　behavior　of　concrete.　The　analytical　model,　which　can　predict　stress-strain　curves　of　both　the　increasing　type　and　the　decreasing　type,　is　verified　by　experimental　results　reported　by　the　authors　and　other　researchers.　A　parametric　study　is　presented　to　examine　the　effects　of　stiffness　of　FRP　and　the　strength　of　concrete　on　stress-strain　relations.