Research Article
Stiffness and Crack Behavior of Unbonded Posttensioned Concrete Beam Strengthened with Aluminum Alloy Plate
Table 2
Initial damage of each damaged beam.
| No. | Cracking load (kN) | Ultimate load (kN) | Maximum crack width (mm) | Number of cracks | Initial prestress (MPa) | Front | Back |
| SL1 | 80 | 204 | 5 | 13 | 12 | 1570 | SL2 | 60 | 180 | 1 | 16 | 16 | 1570 | SL3 | 44 | 200 | 0.3 | 18 | 20 | 1570 | SS1 | 40 | 84 | 2 | 17 | 16 | 1361 | SS2 | 30 | 104 | 0.2 | 19 | 18 | 1570 | SS3 | 34 | 118 | 0.4 | 20 | 20 | 1570 |
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