Seismic　behavior　of　reinforced　concrete　hollow　rectangular　bridge　columns　retrofitted　with　carbon　fiber　reinforced　polymer　(CFRP)　was　carried　out　under　constant　axial　loading　and　lateral　bending.　The　failure　characteristics,　flexural　ductility,　dissipated　energy,　and　hysteretic　behavior　were　analyzed　based　on　cyclic　testing　of　eight　specimens　retrofitted　with　CFRP.　A　simplified　CFRP-confined　concrete　model　is　developed　by　considering　effective　strength　coefficient　and　area　distribution　ratio　of　CFRP　sheets.　The　hysteretic　behavior　and　its　influencing　parameters　were　studied　using　fiber　element　model　in　the　OpenSees　program.　The　results　indicate　that　the　failure　modes　and　damages　region　would　be　changed　and　the　ductility　and　dissipated　energy　of　the　rectangular　hollow　bridge　columns　with　CFRP　were　improved　greatly,　but　the　lateral　load　capacity　was　not　improved　obviously.　The　simplified　analytical　method　presented　in　this　paper　is　effective　for　analyzing　lateral　force　and　deformation　hysteretic　behavior　of　hollow　rectangular　bridge　columns　retrofitted　with　CFRP.