Large-deformation rubber support with combined cross section capable of reducing shear stiffness

Abstract

The invention discloses a large-deformation rubber support with a combined cross section capable of reducing shear stiffness. The large-deformation rubber support comprises an upper jacking plate, a lower jacking plate and a plate rubber support arranged between the upper jacking plate and the lower jacking plate, wherein the inner portion of the plate rubber support is hollowed out, the hollowed-out portion is provided with a multi-layer sliding rubber support, the shape of the multi-layer sliding rubber support is adapted to the shape of the hollowed-out portion, and the multi-layer slidingrubber support comprises a sliding plate, a rubber sheet and a thin steel plate which are laminated. The large-deformation rubber support with the combined cross section capable of reducing the shearstiffness has the advantages that the combined cross section is formed by placing the multi-layer sliding rubber support on the hollowed-out plate rubber support, so that the support has a multi-layersliding ability and slides as much as possible under the condition that unstability does not occur, and the rigidity of the support can be controlled by adjusting the area proportion of the multi-layer sliding support and reserved plate rubber support and adjusting the sliding surface layer number of the multi-layer sliding support.

Description

technical field [0001] The invention relates to bridge engineering and anti-seismic fields, in particular to a plate type rubber bearing capable of multi-layer constrained sliding in earthquakes, which can reduce stiffness and increase deformation and energy dissipation capacity, and in particular to a composite section Large deflection rubber bearings for reduced shear stiffness. Background technique [0002] With the development of my country's economy and technology, the demand for seismic resistance of bridges is getting higher and higher. Although ordinary plate rubber bearings are simple in structure and easy to manufacture and install, their shear stiffness is too large, and their horizontal deformation capacity and energy dissipation capacity are too low. Although the sliding plate bearing can have a large horizontal displacement, its horizontal stiffness is too low, which is easy to cause instability, so it needs to be used with a fixed bearing, and the fixed pier mu...

AI Technical Summary

Problems solved by technology

However, lead is a poisonous substance to the human body, and it is easy to cause pollution to the environment during the process of manufacture, use, and maintenance. The disposal of waste lead cores after the replacement of the support is also an environmental problem that cannot be underestimated.

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