Prestressed bridges are bridge structures constructed using prestressed concrete technology, which introduces compressive forces into the concrete before it is subjected to service loads. This technique overcomes concrete’s natural weakness in tension and enables more efficient structural performance.
Advantages of prestressed bridges:
- Longer spans with reduced structural depth
- Minimal or no cracking under normal service loads
- Reduced deflections and improved serviceability
- More efficient use of materials (less concrete and steel)
- Reduced maintenance requirements over the structure’s life
- Enhanced durability and longevity
- Greater architectural flexibility in design
Prestressed concrete bridges can be constructed using various methods, including precast segmental construction, cast-in-place balanced cantilever, or span-by-span construction, making them suitable for a wide range of span lengths and site conditions.
