Haichen Wholesale Perforated Grid Support - Grid Rubber Support - Porous Grid Support Manufacturer

Description :

　　Plate rubber bearings are a type of bridge bearing product made by embedding, bonding, and vulcanizing multiple layers of natural rubber and thin steel plates. This type of rubber bearing has sufficient vertical stiffness to withstand vertical loads and can reliably transmit the pressure of the upper structure to the pier; Has good elasticity to adapt to the rotation of the beam end; There is significant shear deformation to meet the horizontal displacement of the upper structure.

　　Rubber bearings are a common rubber bearing product made by vulcanizing and bonding multiple layers of thin steel plates and multiple layers of rubber sheets. This product has sufficient vertical stiffness and can reliably transmit the reaction force of the upper structure of the bearing to the pier. The bearing has good elasticity to cope with the rotation of the beam end of the bridge; It also has a large shear deformation capacity to meet the horizontal displacement of the upper structure.

　　The standards implemented by this product are as follows:

　　Highway industry standard: JT/T4-2019 Highway Bridge Plate Rubber Bearings

　　Railway industry standard: TB/T 1893-2006 Railway Bridge Plate Rubber Bearings

　　National standard: GB 20668.4-2007 Rubber Bearings

　　1. Ordinary bridge rubber bearings are suitable for bridges with spans less than 30 meters and small displacements Different planar shapes are suitable for different bridge span structures, and rectangular supports are used for orthogonal bridges; Circular bearings are used for curved bridges, skew bridges, and cylindrical pier bridges.

　　2. The PTFE plate bridge rubber bearings are suitable for large-span, multi span continuous, simply supported beam continuous plate and other structures with large displacement bridges. It can also be used as a slider in continuous beam pushing and T-shaped beam lateral movement. The application of rectangular and circular PTFE plate rubber bearings is similar to that of rectangular and circular ordinary plate rubber bearings.

　　It is made by embedding, bonding and pressing multiple layers of rubber sheets and thin steel plates. There is sufficient vertical stiffness to withstand vertical loads, which can effectively transmit the reaction force of the upper structure to the pier and abutment; Has good elasticity to adapt to the rotation of the beam end, and has significant shear deformation to meet the horizontal displacement of the upper structure.

　　Deformation of rubber bearings

　　The support should have appropriate shear deformation under stress when in use, but excessive deformation can affect the quality and service life of the support. Some manufacturers' products on the market have excessive initial deformation, and many cracks are found at the beginning of laying, mainly due to the addition of recycled rubber in the product. Over time, most of the diseases become severe and must be replaced. The main reasons for this are as follows: the position of the steel plate is not accurate enough, resulting in a reduction in the protective layer of some edges and more serious cracks; Due to the complete detachment of some supports on the same beam, some supports are subjected to excessive force, resulting in excessive initial deformation; The installation of supports can also cause excessive initial deformation of the supports; Excessive longitudinal slope design of bridges leads to excessive longitudinal shear deformation; The installation temperature is too high or too low, causing excessive shear deformation due to changes in ambient temperature, concrete expansion and contraction, creep, and the effects of vehicle braking force.

　　Rectangular grid rubber support, four hole grid support, bridge GJZ plate rubber support, Baiya

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• Perforated grid support