1. Introduction
It is now well-understood that the confinement of concrete
with fiber-reinforced polymer (FRP) composites can lead to significant
improvements in both compressive strength and ductility
of the concrete. A comprehensive review of the literature previously
reported in Refs. [1–4] illustrated the great number of studies
that have been undertaken on the topic to investigate the axial
compressive behavior of both FRP-wrapped concrete columns
(e.g., [5–12]) and concrete-filled FRP tubes (CFFTs) (e.g., [13–18]).
The superior structural engineering properties of high-strength
concrete (HSC) over normal-strength concrete (NSC) makes it an
attractive alternative for use in the construction of new composite
columns such as CFFTs. A number of studies have recently been
reported in the literature on FRP-confined HSCs (e.g., [19–27]),
which have been complemented by a comprehensive experimental
program that has been underway at the University of Adelaide on
the behavior of FRP–HSC composite columns [28–38]. These studies
have demonstrated the ability of these composite column systems
to exhibit a highly ductile behavior under both concentric