Analytical Study of Force–Displacement Behavior and Ductility of Self-centering Segmental Concrete Columns

International Journal of Concrete Structures and Materials

Table 1 Properties of the test specimens.

Specimencode	\( f_{c}^{'} \) (MPa)	Bott. segment confinement	Axial PT load^a (kN)	Material^b
Specimencode	\( f_{c}^{'} \) (MPa)	Bott. segment confinement	Axial PT load^a (kN)	Bott. seg.	Top three seg.
C50	55	Unconfined	50	CC	CRC
C100	55	Unconfined	100	CC	CRC
CF50	55	Confined	50	CC	CRC
CF100	55	Confined	100	CC	CRC
CR50	38	Unconfined	50	CRC	CRC
CR100	38	Unconfined	100	CRC	CRC
CRF50	38	Confined	50	CRC	CRC
CRF100	38	Confined	100	CRC	CRC

^aThe unsaturated ultimate strength, elastic modulus, and thickness of the FRP sheets were 4950 MPa, 227 GPa, and 0.156 mm, respectively.
^bThe PT bars had 20 mm diameter, nominal tensile yield stress of f _py = 900 MPa and ultimate tensile stress of f _pu = 1100 MPa, and total unbonded length of 1950 mm.
CC conventional concrete, CRC crumb rubber concrete.