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Bridge rubber bearing
The bridge rubber bearing is made of multilayer rubber sheet and thin steel plate. It has enough vertical steel to reliably transfer the reverse force of the upper structure to the pier; it has good elasticity to accommodate the rotation of the beam end and large shear deformation ability to meet the horizontal displacement of the upper structure.
The bridge rubber bearing not only has excellent technical performance, but also has the characteristics of simple structure, low price, easy replacement of cushioning and isolation without maintenance, and low building height. Therefore, it is quite popular and widely used in the bridge world.
Features: simple structure, low price, no maintenance
Classification: round board type rectangular plate type
Scope of application: ordinary bridge rubber bearing is suitable for the span of less than 30 meters, small displacement of the bridge. Different plane shapes are suitable for different bridge spans, rectangular support for ortho bridge; curved, diagonal and cylindrical piers.
Bridge rubber bearing not only has excellent technical performance, but also has the characteristics of simple structure, low price, no maintenance, easy replacement of buffer isolation, low building height. Therefore, it is quite popular and widely used in the bridge field.
The bearing capacity of bridge rubber bearings depends on the following three situations:
(1) The rubber itself is crushed or cut;
(2) the compression deformation and shear deformation of rubber exceed the allowable use;
(3) When the support (concrete, steel plate or other) is pulled off by the outward reverse horizontal shear force of rubber or the contact surface of the support and rubber slips off each other.
A large number of experiments have proved that the rubber on the surface of the bridge rubber bearing has compressive strength and shear strength, and is rarely directly crushed or shear. Here to introduce the rubber bearing rubber material is synthetic neoprene rubber (also known as Nath rubber) and vulcanized natural rubber. There are also butyl rubber and rubber mixes. When the strength of the rubber bearing is calculated, the allowable stress is determined by the bearing capacity in (2) and (3) cases.
The upper support plate of the bridge rubber bearing is connected with the upper structure of the bridge and moves with the movement of the beam. The lower support plate is fixed on the top cap of the pier or abutment, and bears the force of the upper structure and transmits it to the pier or abutment. The stainless steel plate on the upper support plate and the polytetrafluoroethylene plate on the lower support plate form a friction part with a small friction coefficient to achieve horizontal displacement, and act on the pier with a small horizontal thrust through the lower support plate.
In the daily inspection and maintenance of the bridge rubber bearing, should check whether the various parts of the support are kept complete and clean, and the garbage, snow and ice around the support should be eliminated in time to ensure the normal operation of the support.
At the same time, the sewage and grease should be cleaned, and the water in the pier and cap should be removed in time. When the silt or silicone grease is dried between the contact surface of the PTFE slide and the stainless steel plate, it should be cleaned up in time and new silicone grease should be injected.
Features: simple structure, low price, no maintenance
Scope of application: ordinary bridge rubber bearing is suitable for the span of less than 30 meters, small displacement of the bridge. Different plane shapes are suitable for different bridge spans, rectangular support for orthobridge, curved, diagonal and cylindrical piers.
| Selection parameters of rectangular plate rubber bearing specification series | ||||||||
| Item | Plane size | Maximum bearing pressure Rck(kN) | Total thickness of support t(mm) | Maximum displacement (mm) | Allowable corner tangent value tanθ (θ is rad) | |||
| la×lb(mm) | Regardless of braking force Δt1 | Gauge braking force Δt2 | Warm areas | Cold areas | Coldest areas | |||
| 1 | 350×400 | 1326 | 69 | 22 | 30.8 | 0.0081 | 0.0069 | 0.0058 |
| 2 | 350×450 | 1496 | 69 | 22 | 30.8 | 0.0074 | 0.0064 | 0.0053 |
| 3 | 400×400 | 1251 | 69 | 22 | 30.8 | 0.0063 | 0.0054 | 0.005 |
| 4 | 400×450 | 1716 | 69 | 22 | 30.8 | 0.0057 | 0.005 | - |
| 5 | 450×450 | 1936 | 69 | 22 | 30.8 | 0.005 | - | - |
Hot Tags: Rubber Bearings For Bridges, Basin Bridge Support, High Damping Rubber Bearing, Basin Rubber Bearing, Neoprene In Bridge, China, Customized, OEM, manufacturers, manufacturing company, factory, price, in stock
