Shock-absorbing and isolation control method and structure with self-resetting function

Abstract

The invention discloses a vibration reduction and isolation control method and structure with a self-resetting function, belonging to the technical field of bridge vibration reduction and isolation control. The invention uses a measuring device located between a main girder and a bridge pier to collect data in real time and transmit it to a control module The control module combines the collected data to analyze and judge the relative displacement state and the relative displacement change trend of the main girder and the bridge pier in real time; The input voltage between the damping devices controls the movement of the girder relative to the pier. The invention can not only prevent the relative displacement of larger piers and girders when and after an earthquake occurs, but also fully utilize the advantages of shock-absorbing and isolation design, and can comprehensively improve the ability of the bridge structure to resist earthquake risks.

Description

technical field [0001] The invention relates to the technical field of shock absorption and isolation of bridges. Background technique [0002] Under strong earthquakes, the bridge structure will suffer from excessive relative displacement between the pier and the main girder, which will cause damage to the bridge deck structure or line structure, and increase the difficulty of post-disaster repair. Seismic isolation design is proven to be an effective seismic strategy to minimize structural damage, but seismic isolation design will lead to large displacement of the bridge structure. If the seismic isolation system has a self-resetting function during an earthquake, it will reduce the relative deformation of the main girder and the bridge pier during and after the earthquake, which has important practical value. The friction pendulum bearing in the bridge shock-absorbing and isolation bearing in the prior art has self-resetting function because of the gravity action of the ...

AI Technical Summary

Problems solved by technology

The friction pendulum bearing in the bridge shock-absorbing and isolation bearing in the prior art has self-resetting function because of the gravity effect of the bearing ball pendulum on the curved surface, but this will cause the rise of the main girder, and the bridge deck construction facilities or The line structure may be damaged because of this; other traditional bridge shock-isolation systems in the prior art generally do not have the self-resetting function, and the deformation is relatively large when the earthquake occurs and after the earthquake

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