A State-of-the-Art Review on Debonding Failures of FRP Laminates Externally Adhered to Concrete

International Journal of Concrete Structures and Materials

Table 1 Ratios of measured to predicted bond strengths.

Model source	FRP-to-concrete			Steel-to-concrete			Both FRP and steel-to-concrete
Model source	Avg.	SD	COV (%)	Avg.	SD	COV (%)	Avg.	SD	COV (%)
Hiroyuki and Wu (1997)	2.87	0.95	33	3.85	1.18	31	3.24	1.09	34
Tanaka (1996)	2.92	1.65	56	5.51	5.30	96	4.02	3.96	99
Van Gemert (1980)	2.19	1.12	51	1.64	0.57	35	1.91	0.96	50
Chaallal et al. (1998)	1.81	0.89	49	1.68	0.70	42	1.71	0.79	46
Khalifa et al. (1998)	1.07	0.24	23	0.76	0.26	34	0.93	0.29	31
Neubauer and Rostasy (1997)	0.82	0.15	18	0.65	0.09	13	0.74	0.15	20
	1.05	0.18	17	0.94	0.11	12	1.00	0.16	16