Fibre-reinforced
polymer (FRP) jackets have been widely used to confine reinforced concrete (RC)
columns for
enhancement in both strength and ductility. More recently, the
benefit of FRP confinement of concrete-filled steel tubes has been explored by
researchers. The main aim of this paper is to present and verify a
theoretical model for FRPconfined concrete-filled steel tubes based on a recent
analysis-oriented model for FRP-confined concrete. To this end, results of a
series of tests on FRP-confined concrete-filled steel tubes are first
presented. The theoretical model is next presented and verified using these
test results. Both the test and the theoretical results show that FRP jacketing
can significantly enhance the ultimate load but may reduce the ductility of
concrete-filled FRP columns.