Seismic isolation control method having anti-girder-falling and anti-collision functions and seismic isolation control structure

Abstract

The invention discloses a seismic isolation control method having anti-girder-falling and anti-collision functions and a seismic isolation control structure, belonging to the field of the seismic isolation technology for bridges. According to the invention, measurement devices positioned between a main girder I and a bridge pier and a main girder II and the bridge pier are utilized respectively to acquire data in real time and transmit the data to a control module; the control module is used for analyzing and judging the lap-jointing status of the main girder I and the bridge pier and the main girder II and the bridge pier, and the distance status and the lap-jointing length variation tendency of the main girder I and the main girder II in real time in combination with the acquired data, and is used for adjusting the input voltages of damping devices between the main girder I and the bridge pier and between the main girder II and the bridge pier respectively, so as to control the movements of the main girder I and the main girder II relative to the bridge pier according to the lap-jointing status of the main girder I and the bridge pier and the main girder II and the bridge pier, and the distance status and the lap-jointing status variation tendency of the main girder I and the main girder II. The method can prevent a collision between the falling girder and the adjoined main girder, and can comprehensively improve the earthquake risk resisting ability of the bridge structure.

Description

technical field [0001] The invention relates to the technical field of shock absorption and isolation of bridges. Background technique [0002] Under the action of strong earthquakes, bridge structures often suffer from collisions between falling beams and adjacent span main beams, which will lead to serious consequences. Seismic isolation design proved to be an effective seismic strategy to minimize structural damage. However, the seismic isolation design in the prior art will lead to a large displacement of the bridge structure, and the collision risk between the falling beam and the adjacent span main beam will increase. Traditional bridge seismic isolation bearings cannot effectively control this risk, or although this risk is reduced, the seismic isolation mechanism is sacrificed to fully exert the required deformation capacity and energy dissipation capacity. [0003] Therefore, in order to comprehensively improve the ability of bridge structures to resist earthquake...

AI Technical Summary

Problems solved by technology

However, the seismic isolation design in the prior art will lead to large displacement of the bridge structure, and the risk of collision between the falling beam and the main beam of the adjacent span will increase

Traditional bridge shock-isolation bearings cannot effectively control this risk, or although it reduces this risk, it sacrifices the deformation capacity and energy dissipation capacity required for the full play of the shock-isolation mechanism

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