This spectacular Santiago Calatrava designed bridge required bearings with rotations on the order of 8% which is beyond the capacity of most devices. As a result Disktron Bearings modified for high rotations also known as Pod Bearings were utilized to provide this capability. This structure opened to traffic in March of 2012.
Using Disktron Bearing System technology, the POD bearing design incorporates tighter tolerance design parameters to handle the higher braking and traction loads seen in high speed rail applications.
Polytron Disc – By utilizing a polyether urethane disc, the POD Bearing accommodates vertical design loads of 10 to 10,000 kips while maintaining its ability to provide rotation in both longitudinal and transverse directions.
SRM (Shear Resisting Mechanism) – A large diameter high strength steel pin transfers horizontal loads from the upper bearing plate to the baseplate and isolates shear loads from Polytron Disc.
PTFE – The PTFE to stainless steel sliding interface results in a very low coefficient of friction.
Polished Stainless Steel – Stainless steel with a mirror finish provides a low friction sliding interface for the PTFE.
- Rotation capacity in excess of 0.08 radians
- Low vertical deflection for single and multi-span structures
- Ability to handle ultra high braking and traction forces
- Can accommodate all live to dead load ratios
- Accommodates high vertical and horizontal loads
- Maintains tight control of horizontal displacement of structure