Table 2 Test and calculated results.
From: Flexural Strength of RC Beam Strengthened by Partially De-bonded Near Surface-Mounted FRP Strip
Specimens | P cr (kN) | Yield | Ultimate | μ (δ u /δ y ) | ΔP (kN) | P n (kN) | \( \frac{{P_{u} }}{{P_{n} }} \) | Failure patterns | ||
|---|---|---|---|---|---|---|---|---|---|---|
P y (kN) | δ y (mm) | P u (kN) | δ u (mm) | |||||||
BC2000 | 42.65 | 143.18 | 6.03 | 190.24 | 79.61 | 13.20 | – | 109.65 | 1.73 | Ductile failure |
BP1600 | 56.93 | 167.20 | 5.97 | 190.25 | 10.12 | 1.70 | 45.6 | 186.97 | 1.02 | FRP peel off |
CP1600-1 | 66.20 | 200.55 | 6.72 | 225.55 | 15.98 | 2.38 | 72.08 | 206.32 | 1.09 | FRP fracture |
CP1600-3 | 46.58 | 173.58 | 6.63 | 233.40 | 26.13 | 3.94 | 72.08 | 206.32 | 1.13 | |
CP500-1 | 42.17 | 161.32 | 6.35 | 208.39 | 19.06 | 3.00 | 54.92 | 193.10 | 1.08 | |
CP500-3 | 53.45 | 162.79 | 6.04 | 233.40 | 26.13 | 4.33 | 72.08 | 206.32 | 1.13 | |
CP400-1a | 52.50 | 163.50 | – | 225.00 | – | – | – | 185.81 | 1.21 | |
CP400-3 | 41.19 | 151.02 | 6.60 | 224.08 | 29.67 | 4.50 | 59.82 | 206.32 | 1.09 | |
CP300-1 | 40.21 | 154.95 | 6.63 | 194.17 | 19.16 | 2.89 | 40.7 | 177.23 | 1.10 | |
CP300-3 | 53.94 | 145.14 | 6.70 | 212.31 | 24.46 | 3.65 | 52.95 | 203.93 | 1.04 | |