Lever-type limiting device

Abstract

The invention belongs to the technical field of building construction, and particularly relates to a lever-type limiting device. The upper end of a fixing bolt runs through a cavity in a force transferring arc plate along the width direction of a bridge girder between a bridge floor and a bridge pier, one end of a lever supporting seat abuts against the inclined plates of support plates, and a force transferring plate sits against the other end of the lever supporting seat; a primary spring and a secondary spring are arranged between the support plates below the vertical direction of the leversupporting seat; when an earthquake comes, longitudinal wave is transmitted to the bridge pier, which transmits energy upwards, the primary spring and the secondary spring are under the action of energy to produce deformation, the inclined plates of the support plates warp upwards, the force transferring plate relies on the lever supporting seat to cause upward and horizontal displacement, the energy is consumed, and the bridge floor is prevented from falling. The bearing capacity degree of the device is high, the industrialized production and assembly of components can be performed, the construction is simple and convenient, the time limit for a project is shortened, after the earthquake, the device can automatically restore the normal position, the maintenance work is reduced, and the bridge grider service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of building construction, in particular to a lever type limiting device. Background technique [0002] Our country has a vast territory, and bridge construction is an important cause in our country, and the earthquake resistance of bridges is the top priority. [0003] With the rapid development of our country's transportation construction, bridges, as the hub projects on the transportation line, are growing rapidly both in number and in extension length. And my country is an earthquake-prone country, and once bridges are damaged by falling beams in an earthquake, the entire transportation network will be paralyzed. [0004] The seismic design of bridges in my country mainly emphasizes the strength of the pier, how to prevent the pier from collapsing in an earthquake. The anti-fall beam structure adopted is mainly to fix the anti-fall beam stoppers on the pier to control the longitudinal displacement and l...

AI Technical Summary

Problems solved by technology

However, due to the lack of connection between the beam body and the pier body, and between the beam body and the beam body, when a high-intensity earthquake strikes, under the impact of the violent shaking of the beam body, the anti-fall beam stoppers are prone to shear failure and fail, resulting in fall beam failure

[0005] At present, there are problems such as cumbersome construction steps and incomplete factory production of the limit device products in the design of earthquake-resistant bridges in my country.

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