Bridge bearings are devices for transferring loads and movements from the deck to the substructure and foundations. In highway bridge bearings movements are accommodated by the basic mechanisms of internal deformation (elastomeric), sliding (PTFE), or rolling. A large variety of bearings have evolved using various combinations of these mechanisms.

 

RB Series of Spherical Bearings

RB series of spherical bearings are suitable for bridge structures with high load and frequent displacement. The spherical bearings are composed of upper support pad, lower support pad, spherical lining plate, flat PTFE sliding plate and dust cover. Transverse movement of the structure can be facilitated as appropriate by a flat sliding interface between flat PTFE sliding plate and spherical lining plate; rotation angle can be facilitated by flat PTFE sliding plate and lower support pad. The properties are as follows:

1.Loads and forces can be transmitted averagely by spherical surface;
2.Rotation angle can be facilitated by flat PTFE sliding plate and lower support pad. The spherical radius and friction coefficient of PTFE decide the rotation moment. Rotation angle can reach up to 0.05rad;
3.Each direction has balanced rotation performance, suitable for curved bridge, ramp bridge, skew bridge and other large span bridges;
4.RB spherical bearings support pressure without rubber plate, thus especially for low temperature regions;
5.Maximum loading capability of the bearings can reach up to 100000Kn, with a maximum rotation angle of 0.06rad;
6.RB spherical bearings have good dustproof and waterproof performances, corrosion and pollution resistant, low rotation frication resistance;
7.RB spherical bearings have simple structure and light weight, compared with pot type bearings, spherical bearing is 20%-30% reduction in weight.
RB series of spherical bearings are produced strictly in accordance with national standard Spherical Bearings for Bridges (GB/T 17955-2009).

 

RB series of spherical bearings
RBQZ Spherical Bearings


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 I.Introduction


      II.Temperature conditions

      III.Specification

      IV.Maintenance