Fiber-Reinforced Polymer-Packaged Optical Fiber Bragg Grating Strain Sensors for Infrastructures under Harsh Environment

Table 1

Interlaminar shear strength of BFRP and GFRP rebar under salt and acid condition under different age.

FRP bars	Corrosion solution	Items	20 days	240 days
BFRP	Salt	Average value	45.1	31.2
		Variance	2.2	2.5
		Deterioration rate	−9.8	−37.6
	Acid	Average value	43.3	29.4
		Variance	2.4	3.3
		Deterioration rate	−13.4	−41.2
	Blank specimen	Interlaminar shear strength (MPa)	50
		Variance (MPa)	1.5
GFRP	Salt	Average value	48.2	39.6
		Variance	1.8	2.5
		Deterioration rate	−6.2	−23
	Acid	Average value	46.8	37.9
		Variance	2.1	3.2
		Deterioration rate	−8.9	−26.3
	Blank specimen	Interlaminar shear strength (MPa)	50
		Variance (MPa)	1.5