Research Article
Failure Mechanism and Mechanical Properties of a Retard-Bonded Prestressed Concrete Girder While Curing
Table 3
Crack development status.
| Vertical load (kN) | The main crack width of PC 1-0-0 in a pure bending section of the test specimen (mm) | Vertical load (kN) | The main crack width of PC 2-0-6 in a pure bending section of the test specimen (mm) | 1 | 2 | 3 | 4 | 1 | 2 | 3 | 4 |
| | | 227 | Crack | 245 | Crack | 250 | 0.08 | 0.05 | 0.06 | — | 275 | 0.06 | 0.07 | 0.07 | 0.08 | 275 | 0.09 | 0.07 | 0.11 | 0.19 | 300 | 0.07 | 0.07 | 0.07 | 0.10 | 300 | 0.20 | 0.17 | 0.23 | 0.31 | 325 | 0.07 | 0.09 | 0.10 | 0.12 | 325 | 0.20 | 0.16 | 0.19 | 0.25 | 360 | 0.08 | 0.15 | 0.16 | 0.28 | 360 | 0.21 | 0.17 | 0.40 | 0.26 | 375 | 0.15 | 0.21 | 0.17 | 086 | 375 | 0.25 | 0.23 | 0.53 | 0.53 | 400 | 0.15 | 0.21 | 0.17 | 0.86 | 400 | — | 0.47 | 0.92 | 0.57 | 420 | 0.60 | 0.33 | 0.64 | 1.21 | 425 | — | 0.61 | 1.21 | 1.01 | 506 | Damage | 557 | Damage | Average distance between cracks (mm) | 256 | Average distance between cracks (mm) | 240 |
| Vertical load (kN) | The main crack width of PC 3-0-8 in a pure bending section of the specimen (mm) | Vertical load (kN) | The main crack width of PC 4-0-0 in a pure bending section of the test specimen (mm) | 1 | 2 | 3 | 4 | 1 | 2 | 3 | 4 | 5 |
| 240 | Crack | 250 | Crack | 270 | 0.08 | 0.08 | 0.09 | 0.09 | 270 | 0.11 | 0.06 | 0.05 | 0.04 | — | 290 | 0.13 | 0.14 | 0.09 | 0.09 | 290 | 0.20 | 0.06 | 0.07 | 0.05 | 0.15 | 310 | 0.18 | 0.19 | 0.10 | 0.13 | 330 | 0.22 | 0.09 | 0.13 | 0.09 | 0.16 | 330 | 0.17 | 0.19 | 0.10 | 0.17 | 350 | 0.29 | 0.05 | 0.11 | 0.17 | 0.17 | 350 | 0.17 | 0.19 | 0.10 | 0.19 | 375 | 0.32 | 0.11 | 0.11 | 0.19 | 0.15 | 365 | 0.17 | 0.19 | 0.09 | 0.23 | 400 | 0.37 | 0.18 | 0.14 | 0.25 | 0.19 | 390 | 0.13 | 0.20 | 0.11 | 0.23 | 425 | 0.39 | 0.20 | 0.18 | 0.32 | 0.25 | 597 | Crack | 609 | Crack | Average distance between cracks (mm) | 233 | Average distance between cracks (mm) | 230 |
| Vertical load (kN) | The main crack width of PC 5-6-8 in a pure bending section of the test specimen (mm) | Vertical load (kN) | The main crack width of PC 6-8-8 in a pure bending section of the test specimen (mm) | 1 | 2 | 3 | 4 | 1 | 2 | 3 | 4 |
| 230 | Crack | 225 | Crack | 265 | 0.12 | 0.06 | 0.12 | 0.06 | 265 | 0.14 | 0.11 | 0.12 | 0.17 | 290 | 0.20 | 0.07 | 0.17 | 0.11 | 290 | 0.17 | 0.15 | 0.13 | 0.23 | 315 | 0.25 | 0.04 | 0.18 | 0.15 | 315 | 0.18 | 0.19 | 0.25 | 0.25 | 340 | 0.25 | 0.05 | 0.11 | 0.17 | 340 | 0.20 | 0.16 | 0.40 | 0.35 | 365 | 0.29 | 0.04 | 0.20 | 0.21 | 365 | 0.53 | 0.28 | 0.57 | 1.01 | 390 | 0.44 | 0.04 | 0.52 | 0.18 | 390 | 0.71 | 0.41 | 0.61 | 1.04 | 415 | 0.80 | 0.05 | 0.70 | 0.58 | 415 | 0.93 | 0.53 | 0.75 | 1.07 | 536 | Crack | 527 | Crack | Average distance between cracks (mm) | 266 | Average distance between cracks (mm) | 250 |
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