An easy-to-rotate plate-type rubber bearing

Abstract

The invention provides an easily rotatable plate type rubber bearing, which belongs to the technical field of bridge bearings. The support is composed of rubber body, porous carbon fiber epoxy resin laminate, carbon fiber mesh, short carbon fiber, and outer protective rubber. Porous carbon fiber epoxy resin laminates and carbon fiber mesh are alternately arranged to restrain the lateral deformation of the rubber and provide the necessary vertical stiffness and load-bearing capacity of the rubber bearing; Compared with the rubber bearing, fewer stiffening layers can obtain greater vertical stiffness, which improves the vertical bearing capacity of the bearing. At the same time, the effective layer thickness ratio of the rubber body increases significantly, which can effectively improve the shear deformation of the bearing. and rotation capacity, reducing the rotational reaction moment of the beam body and the pier; short carbon fibers are added to the rubber to improve the mechanical properties of the rubber; the porous carbon fiber epoxy resin laminate is light in weight, which greatly reduces the overall weight of the support ; In addition, the large shear deformation can give full play to the hysteretic energy dissipation capacity of the high damping of the rubber material, and realize the effective protection of the bridge structure under the earthquake.

Description

technical field [0001] The invention belongs to the technical fields of bridge engineering and earthquake engineering, and in particular relates to a novel light-duty composite rubber bearing, in particular to an easily rotatable plate-type rubber bearing. Background technique [0002] Plate-type rubber bearings have become a widely used and popular bearing type for highways and urban bridges at home and abroad, and rubber bearings can appropriately increase the natural vibration period of the system, which has become an important measure for bridge shock absorption. The traditional plate-type rubber bearing is a bridge shaped product formed by alternate vulcanization and bonding of multi-layer rubber sheets and multi-layer steel plates. This type of rubber bearing steel plate layer provides sufficient vertical rigidity to withstand vertical loads while restraining The lateral expansion of the rubber; the shear deformation of the rubber layer is used to meet the horizontal d...

AI Technical Summary

Problems solved by technology

However, due to the large thickness of the steel plate of the stiffening layer of the plate bearing, the proportion of the height of the bearing is relatively large, and the rotation capacity of the bearing is limited, which will inevitably produce a large rotational reaction moment on the beam body and the pier, and the beam body and the pier are stressed. Unfavorable, it will increase the project cost

At the same time, when subjected to rare earthquakes, its shear deformation and rotation capacity cannot adapt to the displacement of the beam end, and will lose its due function

The plate rubber bearing also has disadvantages such as poor durability (rubber stress aging, steel plate corrosion), high bearing height, and heavy weight.

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