A Mechanical Device provided in between the Substructure and the Superstructure to control the interaction of these two is called Bearing.
The function of a Bearing is to safely transmit the Loads and Forces acting on to or from the Superstructure to the Substructure underneath while providing for free translation and rotation of the Structure supported by the Bearing.
Replacement of existing Bridge Bearings requires:-
- Lifting of Bridge Superstructure at the pier location
- Dismantling and Removal of the existing Bearing
- Breaking of cover concrete on the pier at Bearing location to expose the reinforcement
- Placing additional reinforcement for pedestal & concreting to bear the load for new Bearing