Elastomeric Bearings

Main varieties include Spherical Bearings, Pot Bearings, Elastomeric Bearings, and Rocker Sliding Bearings. Elastomeric laminated bearing are made of multiple layers of rubbers and bonded to thin steel sheets through vulcanization.

Its vertical rigidity is sufficient to bear the perpendicular load and to shift the pressure reliably from the superstructure to the piers. Its elasticity is high enough to suit the rotation of the beam end. Its shear deformation is sufficient to cope with the horizontal displacement of the superstructure. It is quite cheap. This type of bearing

Physical and Mechanical Properties
 

Type of Rubber   Item		CR (-25℃～60℃)	NR (-40℃～60℃)
Hardness (Shore A)		60±5	60±5
Tensile Strength (Mpa)		≥17	≥18
Elongation at Break (%)		≥450	≥450
Brittle Temperature (℃)		≤-40	≤-50
Compression Set (70℃x24h) (%)		≤15	≤30
Resistance to ozone aging (Test Condition: elongation by 20% at 40℃x96h)		100pphm	25pphm
		No Cracking	No Cracking
Air Oven Aging Test	Test Condition	100x70	70x168
	Tensile Strength Change	-15	-15
	Elongation at Break Change	-40	-20
	Hardness Change	0～+10	-5～+10
Peeling Strength of Rubber from Steel		﹥10	﹥10
Peeling Strength of PTFE Plate from Steel		﹥7	﹥7