Energy-dissipating limiting sliding-friction isolation bearing

Abstract

The invention discloses an energy-dissipating limiting sliding-friction isolation bearing which is a bridge friction isolation bearing having limiting capacity applicable to the field of bridge engineering. The energy-dissipating limiting sliding-friction isolation bearing comprises an upper bearing plate, a lower bearing plate, an upper slider, a lower slider, a sliding plate and C-shaped metal bars; under a designed earthquake, sliding friction of the sliders between spherical faces of the bearing plates extend self-vibrating period of a structure, and earthquake energy is dissipated throughthe friction in cooperation with the C-shaped metal bars; under the action of a great earthquake, the C-shaped metal bars can provide certain limiting effect. The shape of the C-shaped metal bars provided herein meets the deformation requirement of the bearing during sliding and can avoid stress concentration. The bearing of the invention is simple in structure, has no need for extra damping andlimiting devices and is particularly applicable to bridge structures having limited pier-top space.

Description

technical field [0001] The invention relates to a bridge support device, which is a bridge friction and shock-isolation support applied in the field of bridge engineering and capable of limiting positions. Background technique [0002] The bridge is a pivotal project on the lifeline of traffic, and it is also an important part of the research on disaster prevention and mitigation in cities and regions. Reasonable and effective anti-seismic countermeasures are taken for bridges to ensure the safety and normal use of bridges in earthquakes, which is of great importance to the earthquake resistance and disaster prevention of cities and regions. Disaster reduction work, as well as post-earthquake recovery and reconstruction work in earthquake-stricken areas are of great significance. The theory of seismic isolation design relies on the energy dissipation characteristics of seismic isolation devices to reduce the impact of earthquake action on bridge structures, which is one of t...

AI Technical Summary

Problems solved by technology

The rubber bearing has good shock absorption and isolation performance, but its bearing capacity is low, it is greatly affected by the environment, its durability is poor, and its horizontal displacement is small

The bearing capacity, displacement performance, and durability of friction-type shock-isolation bearings are superior to those of rubber bearings, but their damping is small, and they usually do not have limit capacity

Under the action of a large earthquake, the upper structure of the bridge may cause the collision of the upper structure and cause the occurrence of falling beams

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