Strengthening of Bridges using External PreStressing
External pre-stressing has been also considered as one of the most powerful techniques for structural strengthening and rehabilitation works. External pre-stressing is preferred for bridge strengthening projects due to its following advantages.
1. Minimal disruption to traffic
2. Low weight of the additional component
3. Speed and short duration of construction
4. Low costs involved
5. Future re-stressing operations could be carried out quickly and conventionally if required.
Some projects are listed here involving application of external pre-stressing in strengthening of projects.
a) Flexural Strengthening of Bridges Girders
b) Shear Strengthening of Headstocks or Pier Caps
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