Large deformation rubber supporting seat for reducing shear stiffness of pull rope limiting composite cross section

Abstract

The invention discloses a large deformation rubber supporting seat for reducing the shear stiffness of a pull rope limiting composite cross section. The rubber supporting seat is arranged between an upper top plate and a lower top plate, and an annular pull rope penetrates a first through hole and a second through hole; multiple layers of sliding rubber supporting seats are arranged at a hollowedout part of a plate-type rubber supporting seat and used for forming a composite section and increasing a sliding face. According to the rubber supporting seat, multiple layers of the sliding rubber supporting seats are arranged on the hollowed plate type rubber supporting seat to form a composite cross section, displacement mutation of the composite cross section supporting seat takes place on aninternal sliding face so that horizontal stiffness can be reduced to adapt to larger deformation; a pull rope penetrates through the upper and lower top plates, and therefore the whole supporting seat is provided with energy-consuming and limiting capabilities.

Description

Technical field [0001] The invention relates to the field of bridge engineering and earthquake resistance, in particular to a bearing with a combined cross-section, multi-layer constrained sliding during earthquakes, reducing stiffness and extending the structural period, and allowing bridge piers to bear the seismic action together, and particularly relates to a bearing A large-deformation rubber bearing with cable-limiting combined cross-section to reduce shear rigidity. Background technique [0002] With the development of my country’s economy and technology, the demand for seismic resistance of bridges has increased. Traditional plate rubber bearings and PTFE plate rubber bearings are not suitable for seismic work. At present, the most widely used lead rubber bearings in engineering have been reduced. Stiffness prolongs the period, and can consume seismic energy to achieve the effect of shock absorption, but lead is a toxic substance to the human body, which is easy to pollute...

AI Technical Summary

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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