Experimental Study on the Bond Performance between Fiber-Reinforced Polymer Bar and Unsaturated Polyester Resin Concrete
Table 3
Summary of FRP bar-UPC pull-out bond test results.
Specimen number
Failure mode
R-GFRP-10-5D-C70
52.70
33.57
1.18
Pull-out
46.50
49.98
29.62
31.84
0.92
1.06
Pull-out
50.75
32.32
1.08
Pull-out
SR-GFRP-10-5D-C70
68.35
43.54
0.82
Rebar fracture
66.45
65.90
42.33
41.98
1.27
0.99
Rebar fracture
62.90
40.06
0.89
Rebar fracture
R-GFRP-6-5D-C70
26.45
46.80
1.65
Pull-out
25.30
25.84
44.76
45.71
2.04
1.81
Pull-out
25.75
45.58
1.73
Pull-out
R-GFRP-15-5D-C70
128.05
36.25
4.21
UPC split
116.25
115.98
32.91
32.83
3.43
2.73
Pull-out
103.65
29.34
0.55
Rebar fracture
R-GFRP-10-3D-C70
37.35
39.65
0.32
Pull-out
30.60
33.90
32.48
35.99
0.28
0.27
Pull-out
33.75
35.83
0.22
Pull-out
R-GFRP-10-7D-C70
60.65
27.59
0.66
Pull-out
65.65
62.53
29.87
28.45
0.46
0.54
Rebar fracture
61.30
27.89
0.51
Rebar fracture
R-GFRP-10-5D-C50
51.05
32.52
0.55
Pull-out
47.95
49.77
30.54
31.70
0.55
0.58
Pull-out
50.30
32.04
0.65
Pull-out
R-GFRP-10-5D-C30
45.05
28.69
1.05
Pull-out
42.45
45.23
27.04
28.81
0.89
1.02
Pull-out
48.20
30.70
1.12
Pull-out
R-BFRP-10-5D-C70
67.30
42.87
0.83
Rebar fracture
64.50
66.20
41.08
42.17
0.76
0.81
Rebar fracture
66.80
42.55
0.85
Rebar fracture
: maximum bond force; : average maximum bond force; : maximum bond strength;: average maximum bond strength; : relative slippage; : average relative slippage. 5D denotes that the bond length between FRP bar and UPC was 5 times the diameter of the FRP bar and C70 denotes that the concrete cover thickness was 70 mm.
