Vibration Isolators for Bridges

Abstract

The invention discloses a vibration isolator for a bridge. The vibration isolator comprises a supporting seat matched with a bridge body and a vibration attenuation supporting mechanism for supporting the supporting seat and for attenuating vibration, wherein the vibration attenuation supporting mechanism comprises an outer sleeve barrel, a supporting sleeve and a sleeve body supporting assembly, the supporting seat comprises a seat body and a slide rod body, and a first vibration attenuation part for attenuating the vibration of the vertical movement of the supporting seat is arranged between the slide rod body and the supporting sleeve. According to the vibration isolator, the supporting seat is a friction swinging structural supporting seat and has good friction energy-consumption effect, and the vibration attenuation supporting mechanism forms floating support to the whole supporting seat, so that the vibration of the bridge body transferred to a bridge foundation is greatly reduced, and the vibration of peripheral buildings is reduced; and meanwhile, when the vertical movement of the bridge extrudes the supporting seat, the first vibration attenuating part arranged in the supporting sleeve can play a role in buffering a vertical impact force of the bridge. The vibration isolator for the bridge is compact in structure; and moreover, various parts are cooperated to each other and synergistic to collectively achieve the buffer effect, and the integrality is good.

Description

technical field [0001] The invention relates to the technical field of bridge vibration reduction, in particular to a bridge vibration isolator. Background technique [0002] At present, seismic isolation, energy consumption and vibration reduction technologies have gradually attracted the attention of countries all over the world and are widely used in building structures and bridge structures. The most common types of existing bridge isolation systems are natural rubber bearings and lead rubber bearings. Bridge rubber bearings are usually installed between the bridge superstructure, piers and abutments, which can comprehensively reduce the seismic load and reduce the seismic load. The damage to the bridge structure has the dual functions of shock isolation and energy dissipation; at the same time, they also support the weight of the upper main structure and provide elastic recovery. [0003] However, although the natural rubber bearing is cheap, the shock absorption and i...

AI Technical Summary

Problems solved by technology

However, the existing rail transit bridge vibration and noise reduction devices have limited vibration reduction effects, and usually have complex structures and high costs, which cannot meet the needs of use

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