A Large Deformation Rubber Bearing with Limiting Combination Section of Cable and Reduced Shear Stiffness

Abstract

The invention discloses a large-deformation rubber support whose shear stiffness is reduced by the limit combination section of the cable. In the through hole; the multi-layer sliding rubber bearing is arranged in the hollow of the plate rubber bearing to form a combined section and increase the sliding surface. The present invention forms a combined section by placing a multi-layer sliding rubber bearing on the hollow plate rubber bearing, and the displacement mutation of the combined section bearing occurs on the internal sliding surface so that the horizontal stiffness can be reduced to adapt to larger deformation; in the upper and lower top plates Penetrating through the cable makes the entire support have energy dissipation and position limiting capabilities.

Description

technical field [0001] The invention relates to the field of bridge engineering and anti-seismic, in particular to a bearing with a composite section, capable of multi-layer constrained sliding during an earthquake, reducing stiffness and prolonging the structural period, and enabling the bridge pier to bear the seismic action together, especially to a bearing A large-deformation rubber bearing with reduced shear stiffness due to the limit combination section of the cable. Background technique [0002] With the development of my country's economy and technology, the demand for anti-seismic bridges has increased. The traditional plate rubber bearings and PTFE plate rubber bearings are not suitable for seismic work. Although the lead core rubber bearings that are most widely used in engineering are reduced The rigidity prolongs the period, and can consume earthquake energy to achieve the effect of shock absorption and isolation. However, lead is a poisonous substance to the hum...

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Problems solved by technology

[0002] With the development of my country's economy and technology, the demand for anti-seismic bridges has increased. The traditional plate rubber bearings and PTFE plate rubber bearings are not suitable for seismic work. Although the lead core rubber bearings that are most widely used in engineering are reduced The rigidity prolongs the period, and can consume earthquake energy to achieve the effect of shock absorption and isolation. However, lead is a poisonous substance to the human body, which is easy to cause pollution to the environment, and under the action of a large earthquake, the lead core rubber bearing moves too much, which is easy to cause falling beam

[0003] The cable damping bearings currently put into production, such as the cable damping spherical bearing, the cable damping pot bearing, etc., although they have the ability to limit the deformation of the cable, they still have fixed bearings, movable For the support, the fixed support needs to be installed with anchor bolts. Under the earthquake, the internal force of the fixed pier is still large before the bolts are sheared, and it may have entered the yield stage at this time; the shearing of the anchor bolts during strong earthquakes will cause displacement out of control; After the anchor bolts are cut off, the stiffness of the bridge cannot meet the traffic requirements. In the earthquake relief, it is necessary to spend precious time to reinstall the anchor bolts

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