Classification of Laminated bridge bearings
1. Classification by structure
(2) Classification by material and applicable temperature
Normal temperature rubber bearing, chloroprene rubber(CR) Applicable temperature -25℃ ~ 60℃
Cold resistant rubber bearing Nature rubber(NR) Applicable temperature -40℃ ~ 60℃
2. Technical requirements
1) Design requirements
The design parameters, design requirements and inspection requests of elastomeric bearings will be depended on EN, ASTM and ISO standards.
2) Mechanical properties
|Measured tangent value of rotation angle||Concrete bridge||≥ 1/300|
|Steel bridge||≥ 1/500|
|Measured friction coefficient between PTFE plate and stainless steel surface(when silicone grease is added)||≤ 0.03|
3) The minimum thickness of PTFE sheet bonded with PTFE slide plate should comply with the following table regulations.
|Rectangular elastomeric bearing||Round elastomeric bearing|
|Long side range||thickness||Diameter range||thickness|
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