Laminated Elastomeric Bearing Pad: High Vertical Load

A steel laminated elastomeric bearing is cut into a L shape and we can see the internal structure clearly.

LEBP-01: Laminated elastomeric bearing pad internal structure.

Laminated elastomeric bearing pad, one type of reinforced elastomeric bearings, is made of multi-layer rubber and reinforced with steel plate through sulfuration and adhesion. Compared with non-reinforced elastomeric bearing, it has sufficient vertical rigidity which can reliably transfer the concentrated down-loads and impact loads of the superstructure to both ends of the pier. What's more, laminated elastomeric bearing pad not only has fine elasticity which can adapt the rotation of beam end but also has great shearing deformation capacity which can satisfy the horizontal displacement of the superstructure. Thus, it is often applied for steel bridge, PC bridge, RC bridge including right, curved, or skew angled bridge.

A black rectangular steel laminated elastomeric bearing with its cross section drawing.

LEBP-02: Rectangular laminated elastomeric bearing pad.

A black round steel laminated elastomeric bearing with its cross section drawing.

LEBP-03: Round laminated elastomeric bearing pad.

Standard material physical properties
Material	Durometer	Hardness	Tensile strength	Elongation at break	Compression set
Material	Durometer	Shore A	Min. psi	min	max
Nature rubber	50	45-55	2500	450%	25%
	60	55-65	2500	400%	25%
	70	65-75	2500	350%	25%
Neoprene	50	45-55	2250	400%	35%
	60	55-65	2250	350%	5%
	70	65-75	2250	300%	5%

Load distribution and movement accommodation of laminated elastomeric pad.

Three pictures are showing the movement and deformation of laminated elastomeric bearing pad.

Feature

Superior flexibility. Adapt to the rotation of the beam end.
Large shear deformation. Can satisfy the horizontal displacement of the superstructure.
Sufficient vertical rigidity. Capable to withstand vertical loads and external forces.
Excellent isolation effect. Can reduce the impact force from the live load and earthquake.
Wide range of application. In addition to used in bridges, it also can be used for hydraulic engineering and earthquake resistant facility.

Many pieces of rectangular laminated elastomeric bearing pads are in workshop.

LEBP-04: Rectangular laminated elastomeric bearing pads are in workshop.

Many pieces of round laminated elastomeric bearing pads are in workshop.

LEBP-05: Round laminated elastomeric bearing pads are in workshop.

Application
Laminated elastomeric bearing pad can accommodate movement in any direction and rotational movement of any axis by elastic deformation. They are usually used where bridges are susceptible to high loading, high translation and rotations.

A steel laminated bridge bearing is connected the bridge deck and the bridge pier.

SLEB-05: Laminated elastomeric bearing pad is applied for bridge.

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Zaoqiang Dacheng Rubber Co., Ltd.
E-mail: sales@bridgebearing.org

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