Hybrid Effects of Carbon-Glass FRP Sheets in Combination with or without Concrete Beams

International Journal of Concrete Structures and Materials

Table 1 Measured results for the uniaxial tensile tests of CF and GF rovings (first test program) and provided properties of CF and GF filaments.

	CF-N-1	CF-N-2	CF-N-3	CF-N-4	CF-N-5	CF-N-6	CF-N-7	Average
σ _{u_CF}	1,248	1,529	1,273	1,241	1,069	1,406	1,208	1,283
ε _{u_CF}	0.011	0.0123	0.0117	0.0114	0.01	0.0125	0.0105	0.0113
E _CF	114	125	109	109	107	113	115	113

	CF-A-1	CF-A-2	CF-A-3	CF-B-1	CF-B-2	CF-B-3	CF-B-4	CF-B-5	CF-B-6	Average
σ _{u_CF}	1,734	1,680	1,382	1,628	1,544	1,354	1,515	1,533	1,624	1,553

	GF-N-1	GF-N-2	GF-N-3	GF-N-4	GF-N-5	GF-N-6	GF-N-7	GF-N-8	GF-N-9	GF-N-10	Average
σ _{u_GF}	708	883	757	776	901	769	801	794	785	742	792
ε _{u_GF}	0.0167	0.0185	0.0177	0.0167	0.0209	0.0191	0.0174	0.0166	0.0154	0.0169	0.0176
E _GF	42.3	47.8	42.9	46.4	43.2	40.3	46.0	47.8	51.1	43.9	45.1

	GF-A-1	GF-A-2	GF-A-3	GF-A-4	GF-A-5	GF-B-1	GF-B-2	GF-B-3	GF-B-4	GF-B-5	Average
σ _{u_GF}	580	584	869	571	661	1052	951	890	799	681	764

Filament properties are provided by the manufacturer.
σ_{u_CF} measured ultimate stress of CF roving (MPa); ε_{u_CF} measured ultimate strain of CF roving; E_CF measured elastic modulus of CF roving (GPa); σ_{u_GF} measured ultimate stress of GF roving (MPa); ε_{u_GF} measured ultimate strain of GF roving; E_GF Measured elastic modulus of GF roving (GPa).
CF carbon fiber roving, GF glass fiber roving, N non-impregnated rovings, A impregnated-type A grip, B impregnated-type B grip.