Seismic-mitigation-and-isolation control method and structure with self-reset function

Abstract

The invention discloses a seismic-mitigation-and-isolation control method and structure with the self-reset function, and belongs to the technical field of seismic-mitigation-and-isolation control over bridges. The seismic-mitigation-and-isolation control method includes the steps that a measuring device located between a main beam and a bridge pier is used for collecting data in real time and sending the data to a control module; the control module analyzes and judges the relative displacement states and the relative displacement variation trends of the main beam and the bridge pier in real time in combination with the collected data; the control module adjusts the input voltage of a damping device located between the main beam and the bridge pier according to the real-time relative displacement states and the real-time relative displacement variation trends of the main beam and the bridge pier to control the movement of the main beam relative to the bridge pier. By means of the seismic-mitigation-and-isolation control method and structure, large pier-beam relative displacement generated when a seism occurs and after the seism occurs can be prevented, the advantage of seismic-mitigation-and-isolation design can be fully developed, and the capacity, resistant to the seismic risk, of a bridge structure can be roundly improved.

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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