Numerical Analysis on Flexural Behaviors of Prestressed Reinforced Concrete Beams Strengthened with NSM CFRP Strips

Table 1

Design parameters and results of test beams.

Specimens	Upper limits of overload amplitude (kN)	Cycle number (times)	Sustained load (kN)	Strengthening	(kN)	Failure modes
PCB0	—	—	—	Unstrengthened	229.4	A
MPCB1	0.9	1	0.9	CFRP strips	245.8	A and B
MPCB2	0.9	50	0.9		260.7	B
MPCB3	0.9	100	0.9		257.6	B
MPCB4	1.3	50	1.3		254.6	A and B

Note. is measured yield load value of control beam PCB0 and is the ultimate load of each specimen. A = concrete crushing in the compressive zone and B = wedge-shaped failure of concrete cover in the tensile zone.