Spherical Bridge Bearing Accommodates Large Rotations
Spherical bridge bearings, composed of precision-machined steel plates with spherical concave and convex surfaces, provide flexible movements and rotations between the superstructure and supporting structures to transfer whether horizontal or vertical force safely.
Features:
Spherical bridge bearing - guided type
- Allows for large displacement.
- Accommodate larger rotations than pot bearing in excess of +/- 0.03 radians.
- Unlimited movement capability in any directions.
- Excellent self-alignment capability.
- Minimum sliding friction coefficient.
- Dimpled PTFE disc is fitted in 1/2 depth of the concave steel plate for higher load bearing capacity.
- PTEF disc with cavities for containing lubricant to reduce sliding friction.
- Complying with BS EN-1337, KS4424, AASHO, ISO or other custom standards.
- Easy installation.
- Low cost maintenance.
Applications:
- Ideal for structures with bearings of larges turning angles.
- Bridges with big torsions.
- Bridges in low temperatures lower than -30℃.
- Wide and curved bridges.
Types:
Similar to pot bearing, spherical bridge bearings are available in fixed type, guided type and free sliding types as shown in the following pictures:
Fixed spherical bridge bearing
Guided spherical bridge bearing
Free sliding spherical bridge bearing
- Fixed type bearing only allows for rotations, any longitudinal or transversal movement is restrained.
- Guided type has edge steel guide to accommodate unidirectional movements.
- Free sliding type bearing can slid in all directions.