FRP-constrained basin-shaped rubber support

Abstract

An FRP-constrained basin-shaped rubber support comprises a composite upper seat plate, an friction-reducing lining plate, a composite middle plate, a reinforced rubber layer and a composite bottom basin, wherein the composite upper seat plate, the composite middle plate and the composite bottom basin are all composed of more than one layer of FRP sheet wrapping layers, a steel upper seat plate, asteel middle plate and a steel bottom basin, which are bonded and compounded. An FRP constraint band is additionally wound and bonded on the periphery of the basin wall of the composite bottom basin in an annular mode, the reinforced rubber layer is formed by completely vulcanizing more than one FRP cylindrical grids and a rubber layer. According to the invention, by utilizing the FRP cylindricalgrids, the transverse expansion of the inner rubber layer is effectively constrained, and the bearing capacity and inner damping energy consumption capability of the support are improved; the inherentadvantages of fatigue resistance, corrosion resistance, creep resistance and the like of the FRP sheet are utilized, and protection is provided on the periphery of the basin-shaped rubber support; the FRP constraint band is additionally wound and bonded on the periphery of the basin wall of the composite bottom basin in an annular mode, so that the FRP constraint band can more effectively constrain the deformation of the steel basin.

Description

technical field [0001] The invention relates to a bridge support, in particular to an FRP-constrained basin-type rubber support, which belongs to the technical field of bridge supports. Background technique [0002] As an important component connecting the upper and lower structures of the bridge, the bridge support should have the ability to bear vertical pressure, rotate deformation, shear deformation or slide under the bridge load. However, in many projects in the past, due to the structure of the support Because of its simple form and low cost, its importance is often overlooked by designers and researchers. [0003] With the rapid development of bridge construction, basin-type rubber bearings have been widely used in urban bridges, highway bridges, and railway bridges in China. Overloaded bridges and frequent earthquake disasters in China have caused bridge bearings to be the most prone to failure in bridge structures. The main failure forms of basin-type rubber bearin...

AI Technical Summary

Problems solved by technology

The rubber layer of the basin-type rubber bearing only relies on the steel basin to provide circumferential constraints. The rubber layer lacks effective constraints, and the lateral deformation under load is large, which makes the wall thickness of the steel basin very large, and excessive lateral deformation often occurs during use. The situation that caused the steel basin to be damaged by tensile fracture

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