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Companies: CHINA BAOLI GROUP

Address: No.396 Heping West Road, Hengshi City, Hebei Province, China.

General plate rubber bearing :

This bearing is desirable for bridges. Pot bearing is economical due to simpleconstruction method and it is structurally more compact, light, and lower in construction

height and long service life. The main part of bearing are sliding plate,alloy steel sliding surface, bearing pot, PTFE disc, pot cover, vulcanized-inpressure seal, elastomeric pad and seal against moisture.

The bearing is classified as three types: sliding guided type, free sliding bearing and fixed type.Dimensions and weights for deviating permissible concrete pressures and unusual load
conditions will be calculated on request. Depending on the area of application and country requirements pot bearings can be supplied in accordance with various

standards, e.g. DIN 4141, BS5400, AASHTO, JT391, etc .

            General plate rubber bearing

1. Structure and performance of General plate rubber bearing

   General plate rubber bearing  is sulfurized and stuck gether by several layers of rubber sheet and thin steel plate. It has sufficient vertical rigidity, and can reliably transfer the counterforce on the upper structures to pier platform; it has fine elasticity, and can adapt to the rotation of beam end; it has great shearing deformation capacity, and can satisfy the horizontal displacement of the upper structures.

   Adhere a layer of 1.5mm to 3mm thick polytetrafluoroethylene plate on the surface of the above  General plate rubber bearing ,and polytetrafluoroethylene sliding General plate rubber bearing is formed. Besides vertical rigidity and elastic deformation, able to endure vertical load and suit to the rotation of beam end, the beam end can freely slide on the surface of the tetrafluoro plate due to the low friction coefficient of the polytetrafluoroethylene plate, and the horizontal displacement is not limited; it specially suit to bridges with medium or low load and large displancement.

   General plate rubber bearing not only has fine technical performances, but also has simple structure, low price, no maintenance, easy to change, buffering and shock is isolating, low building height, and other characteristics. Therefore, it is welcomed and widely used in bridges.

   The three executive standards of the products at persent:

The standard of Highway industry: JT/T4-2004 Plate type rubber bearing of highway bridges

The standard of Railway industry: TB/T 1893-2006 Plate type rubber bearing of railway bridges

National standard : GB 20668.4-2007 Plate type rubber bearing The forth part: General plate type rubber bearing

2.Applicability of General plate rubber bearing

2.1 General   Bridge support  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, obique crossing bridges and cylindrical pier bridges adopt circular bearing.

2.2
Tetrafluoro rubber support  suits to bridges with large span, several spans
in continuous, with simply supported beam and continuous plates strutures, and
large displacement. It can still be used as the sliding block in pushing of
continuous beam and cross sliding of T-shaped beam. The application of
rectangular and circular tetrafloro General plate rubber bearing are the same
with rectangular and circular General plate rubber bearing .

3.The operating principle of plate type rubber bearing

The main function of plate type rubber bearing is reliably transfer the counterforce on the upper structures to pier platform, and meet the need deformation of beam body ( horizontal displacement and rotation). It has sufficient vertical rigidity so that can guarantee the lesser deformation of bearing in the effect of maximum vertical load. It has fine elasticity at horizontal direction, and can adapt the horizontal displacement due to the effects of braking force, temperature, contraction of concrete, creep and load, and at the same time, it can adapt the rotation of beam end.