Seismic Upgrading - Retrofitting of Bridges

A new column was installed at the end of the pier cap beam to support an additional 3.6 m long concrete bolster, which increased flexural capacity. Post-tensioned strand tendons placed in parallel, on each side of the pier cap beam, connected new concrete to the existing box girders. A large steel bracket, attached to the bridge web at the tendon fixed end, allowed for uniform distribution of prestressing forces to the entire structure.