Shear-resistant spherical steel bearing

Abstract

The invention provides a shear-resistant spherical steel bearing. The shear-resistant spherical steel bearing comprises an upper bearing plate assembly, a lower bearing plate assembly and a spherical cap liner, wherein the spherical cap liner is arranged between the upper bearing plate assembly and the lower bearing plate assembly in a sliding manner; the lower bearing plate assembly comprises a lower bearing plate, a bottom plate and damping springs; the lower bearing plate is arranged between the bottom plate and the spherical cap liner, and is in sliding fit with the bottom plate; and the damping springs are arranged along the sliding direction of the lower bearing plate. The shear-resistant spherical steel bearing disclosed by the invention is suitable for a large-span upper structure with high horizontal shear rigidity and has the advantage of high safety.

Description

Technical field [0001] The invention relates to the technical field of bridge bearings, in particular to a shear-resistant spherical steel bearing. Background technique [0002] In normal work, ordinary spherical steel bearings rely on their own damping to meet the requirements of the superstructure. However, under strong winds, earthquakes and other environments, it will be difficult to withstand the large horizontal loads generated by earthquakes, that is, when the spherical steel bearings are subjected to the level When the shear stiffness is large and accompanied by a certain vertical load, the superstructure has a great safety hazard; at the same time, the movable support slides horizontally under the action of the large horizontal load of the earthquake, and the vibration reduction and isolation mechanism cannot be activated immediately, causing the bridge piers and beams to slide horizontally. The relative horizontal displacement is relatively large, and the falling beam i...

AI Technical Summary

Problems solved by technology

However, there are problems such as complicated production, heavy environmental pollution, and difficult material acquisition; another type of friction swing bow type spring steel plate vibration isolation bearing also has the function of damping and energy dissipation, but it is very easy to cause serious damage when there is vertical tensile stress on the bearing The problem

At the same time, when the existing damping and energy-dissipating devices of spherical steel bearings are applied to the superstructure of long-span bridges, they cannot provide sufficient damping force, and the energy-dissipating and shock-absorbing capabilities of spherical steel bearings under the action of earthquakes and strong winds And the problem of low horizontal shear capacity, resulting in great damage to the long-span superstructure caused by the earthquake, there is a great potential safety hazard

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