Review of Experimental Studies on Application of FRP for Strengthening of Bridge Structures

Table 4

The mechanical properties of FRP bars and prestressing steel [92].

	AFRP	CFRP	GFRP	Prestressing steel
Fiber volume ratio	0.65	0.65	0.55	—
Density (g/cm^3)	1.28	1.53	2.1	7.85
Longitudinal tensile strength (GPa)	1.25–1.4	2.25–2.55	1.08	1.86
Transverse tensile strength (MPa)	30	57	39	1860
Longitudinal E-modulus (GPa)	65–70	142–150	39	210
Transverse E-modulus (GPa)	5.5	5.7	8.6	210
In-plane shear strength (MPa)	4.9	71	89	—
In-plane shear modulus (GPa)	2.2	7.2	3.8	72.1
Major Poisson’s ratio	0.34–0.6	0.27	0.28	0.3
Minor Poisson’s ratio	0.02	0.02	0.06	03
Bond strength (MPa)	10–13	4–20	—	6.6–7.1
Maximum longitudinal strain (%)	2.0–3.7	1.3–1.5	2.8	4.0
Maximum transverse strain (%)	—	0.6	0.5	4.0
Longitudinal compressive strength (MPa)	335	1440	620	1860
Transverse compressive strength (MPa)	158	228	128	1860
Longitudinal thermal expansion coefficient (×10^−6·1/°C)	−2	−0.9	7	11.7
Transverse thermal expansion coefficient (×10^−6·1/°C)	60	−27	21	11.7