Research Article
Effects of Seawater Corrosion and Freeze-Thaw Cycles on Mechanical Properties of Fatigue Damaged Reinforced Concrete Beams
Table 12
Bending stiffness analysis.
| Fatigue | Specimen | Initial stiffness | amplitude reduction | Yield stiffness | amplitude reduction | Ultimate stiffness | amplitude reduction | load level | kN⋅m2 | kN⋅m2 | kN⋅m2 |
| 0 | A1 | 414 | 0 | 190 | 0 | 89 | 0 | B1 | 343 | 17.1% | 130 | 31.6% | 68 | 23.6% | C2 | 318 | 23.2% | 104 | 45.3% | 57 | 36.0% |
| 0.2 | A4 | 341 | 0 | 190 | 0 | 82 | 0 | B3 | 324 | 5.0% | 131 | 31.1% | 55 | 32.9% | C3 | 260 | 23.7% | 95 | 50.0% | 53 | 35.4% |
| 0.3 | A6 | 298 | 0 | 152 | 0 | 79 | 0 | B6 | 320 | −7.4% | 110 | 27.6% | 53 | 32.9% | C5 | 245 | 17.8% | 91 | 40.1% | 48 | 39.2% |
|
|