Research Article
Flexural Behavior of Concrete Beam Strengthened by Near-Surface Mounted CFRP Reinforcement Using Equivalent Section Model
Table 3
Experimental results.
| | Specimens | CONTROL | R-TR-10 | R-PL-15 | R-PL-25 | R-RD-9 | R-PL-252-S | R-PL-252-2S | R-RD-92-S | R-RD-92-2S |
| | Cracking |
(N·mm103) | 8930 | 8705 | 8122 | 8663 | 8652 | 9466 | 11240 | 10164 | 10883 |
(kN) | 15.98 | 16.58 | 15.47 | 16.5 | 16.48 | 18.03 | 21.41 | 19.36 | 20.73 |
(mm) | 1.38 | 1.74 | 1.72 | 1.98 | 1.66 | 1.88 | 2.84 | 1.66 | 1.84 | | 1 | 1.04 | 0.97 | 1.03 | 1.03 | 1.13 | 1.34 | 1.21 | 1.3 |
| | Yielding |
(N·mm103) | 24512 | 28859 | 30172 | 32387 | 32855 | 37779 | 37007 | 40724 | 40562 |
(kN) | 46.69 | 54.97 | 57.47 | 61.69 | 62.58 | 71.96 | 70.49 | 77.57 | 77.26 |
(mm) | 12.48 | 13.36 | 15.5 | 16.06 | 15.36 | 16.46 | 14.16 | 15.22 | 15.4 | | 1 | 1.18 | 1.23 | 1.32 | 1.34 | 1.54 | 1.51 | 1.66 | 1.65 |
| | Maximum |
(N·mm103) | 29500 | 41533 | 41160 | 45245 | 48631 | 57572 | 56191 | 59036 | 78556 |
(kN) | 56.19 | 79.11 | 78.40 | 86.18 | 92.63 | 109.66 | 107.03 | 112.45 | 149.63 |
(mm) | 71.68 | 58.68 | 58.94 | 53.98 | 43.88 | 46.92 | 44.44 | 39.5 | 54.19 | | 1 | 1.41 | 1.4 | 1.53 | 1.65 | 1.95 | 1.9 | 2 | 2.66 |
| | Ductility | | 5.74 | 4.39 | 3.8 | 3.36 | 2.86 | 2.85 | 3.14 | 2.6 | 3.52 |
| | CFRP efficiency | (%) | — | 100 | 100 | 83 | 84 | 69 | 75 | 70 | 91 |
| | Strength effect per axial rigidity | | — | 22.6 | 22.32 | 14.72 | 12 | 9.36 | 9.14 | 7.28 | 9.69 |
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