Spherical Bearing
Spherical bearings are a premium type of bridge bearing that uses a spherical sliding surface combined with a PTFE–stainless steel sliding system, enabling large rotations, high load capacity, and flexible displacement. With a low friction coefficient, outstanding durability, and long service life, they are well-suited for major bridges, curved bridges, cable-stayed bridges, and projects requiring stable performance under harsh conditions.
Functions & Operating Principle
Spherical bearings allow:
Large Rotation Capacity
Rotation angles are significantly greater than those of elastomeric or pot bearings → suitable for long-span bridges, curved bridges, and bridges with steep gradients.
Low-Friction Sliding
The PTFE layer combined with stainless steel reduces the friction coefficient to only 0.03–0.06.
High Load Transfer Capacity
Because contact occurs on a spherical surface, stresses are distributed more uniformly.
Multi-Directional Displacement Capacity
Supports thermal movement, girder displacement, and vibration.
Detail Drawing
- Upper Plate (Upper plate)
- P.T.F.E (PTFE sliding surface – Polytetrafluoroethylene)
- Middle Plate (Middle plate)
- P.T.F.E (PTFE sliding surface – Polytetrafluoroethylene)
- Lower Plate (Lower plate)
