Laminated Elastomeric Bearing Pads
From Structural Bearing Assemblies - Elastomeric Bearing Pads for Bridge
Dacheng elastomeric laminated bearing pads with simple reinforcement are made up of multiple elastomer layers separated by reinforcing steel plates, sulfurized and moulded together can be manufactured in a rectangular or circular shape to meet individual engineering requirements. G eneral laminated bearings suits to bridges with span less than 30m and small displacement.Different flat shape suits to different bridge span structures : orthogonal bridges adopt rectangular bearing; curvilinear bridges, oblique crossing bridges and cylindrical pier bridges adopt circular bearing.
Application
Elastomeric Bearings have been designed to be very easy to install, maintenance-free and cost-effective. The product has been successfully used in a broad range of applications which include : bridges, viaducts, high rise buildings, stadiums and dams.
Elastomeric Bearings are designed to accommodate three types of movement : Vertical , Shear , Rotation. To transfer the load from the superstructure (both vertical and horizontal) to the substructure. Bridge with span less than 10m don't normally require any bearings. To accomodate translational move
ments(expansion and contraction) e.g. movement due to temperature (can be large in steel bridges, up to 300mm); due to dead load & live load especially sloping road; shrinkage and creep etc.To accommodate rotational movements of deck girders. Rotation occurs as the deck deflect under load. Also, some relative rotations occur in composite section due to different properties of concrete and steel. Differential settlement may also cause some rotational movement. To limit forces transmitted to the substructures by suitable design.
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