57,59]. Benefiting from the improved
properties of the internal concrete, SFRHSC-filled FRP tubes
(SFRHSCFFT) may form an attractive composite system that is
capable of addressing the aforementioned shortcoming seen in
FRP-confined conventional HSC. However, as revealed by a careful
review of the existing literature, no study has been reported to dateon the behavior of FRP-confined SFRCs under concentric compression.
The only existing study on FRP-confined SFRCs examined the
behavior of specimens that contained internal steel reinforcing
bars under eccentric loading [61].