Structural characteristics and performance of plate-type rubber bearings for highway bridges
The plate-type rubber bearing of highway bridge is manufactured and accepted according to JT/T 4-2004 standard of the Ministry of Communications. It is made of multilayer rubber sheets and thin steel plates after being bonded and vulcanized under pressure. It has sufficient vertical stiffness, can reliably transmit the reaction of the superstructure to the piers and abutments, has good elasticity to adapt to the rotation of the beam end, and has large shear deformation capacity to meet the horizontal displacement of the superstructure.
Stick a layer of polytetrafluoroethylene plate with a thickness of 2mm to 4mm on the surface of the above plate-type rubber bearing to make the polytetrafluoroethylene slide-type rubber bearing. In addition to its vertical rigidity and elastic deformation, it can bear vertical load and adapt to the rotation of beam end, because of the low friction coefficient of PTFE plate, it can make the beam end slide freely on the surface of PTFE plate, and the horizontal displacement is not limited; Especially suitable for bridges with medium and small loads and large displacement.
The plate-type rubber bearing not only has excellent technical performance, but also has the characteristics of simple structure, low price, no maintenance, easy replacement, shock absorption and isolation, and low building height. Therefore, it is popular and widely used in the bridge industry.
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