The average hoop strain in FRP at rupture in FRPwrapped concrete can be much lower than the FRP material ultimate tensile strain from flat coupon tests,indicating the assumption that FRP ruptures when the FRP material tensile strength reached is not valid in the case of concrete confined by wrapped FRP. Based on this observation, a unified stress–strain model for concrete confined by different types of FRP must be based on the actual hoop rupture strain of FRP rather
than the ultimate material tensile strain.