Table 6 Inversion of long-term mid-span deflection
Number | Influence factors of mid-span deflection | Left bridge | Right bridge | ||
|---|---|---|---|---|---|
Mid-span (mm) | Sid-span (mm) | Mid-span (mm) | Sid-span (mm) | ||
① | Uneven settlement | 0.0 | 0.0 | -8.0 | 1.2 |
② | Shrinkage and creep | -26.2 | -29.0 | -24.9 | -29.6 |
③ | Concrete over-square | -6.4 | -11.3 | -1.9 | -12.3 |
④ | Stiffness reduction | -17.4 | -17.4 | -17.4 | -17.4 |
① + ② + ③ + ④ | Total | -67.3 | -75.0 | -69.5 | -75.4 |
⑤ | Measured value (temperature correction) | -62.0 | -75.5 | -78.2 | -71.0 |
⑤- (① + ② + ③ + ④) | Prestress loss | -12.0 | -17.8 | -26.0 | -12.9 |
Inversion results of prestress loss | -8.8% | -13.1% | -19.2% | -9.5% | |