Adjustable friction damper

Abstract

The invention relates to an adjustable friction damper. The adjustable friction damper comprises an outer cylinder, a piston, friction cushions, a sliding plate, a left fixed plate, a right fixed plate and reserved bolt holes. The friction damper can be mounted through the reserved bolt holes in the fixed plates; the sliding plate is parallel to the axis direction of the outer cylinder so that itis guaranteed that the sliding plate can slide in the axis direction of the outer cylinder; and the friction cushions are arranged in the parts, making contact with the sliding plate, of the two sidesof the sliding plate correspondingly and can be replaced into corresponding materials according to the different requirements. According to the adjustable friction damper, the pressure of the pistonto the sliding plate is changed through hydraulic pressure so as to change friction force, and accordingly different damping force is obtained; the hydraulic pressure can be provided by a mechanical generating pump or a hydroelectric generating pump, and the magnitude of the pressure can be changed with little energy consumption; and the adjustable friction damper has stable hysteretic performanceand good energy consumption capability, can be used for strengthening structural performance and bearing earthquake loads with various strength, meanwhile has the advantages of being easy to manufacture, low in maintenance cost and the like, therefore, is better in engineering practicability and has wide application prospects.

Description

technical field [0001] The invention relates to an adjustable friction damper, as long as the pressure of the piston on the sliding plate is changed through hydraulic pressure to change the friction force, so as to obtain different damping forces, it has good energy consumption capacity and cost-effectiveness, and belongs to the field of shock absorption control of building structures . Background technique [0002] The friction damper is a kind of control device that dissipates the vibration energy by using the friction energy dissipation of the friction surface. The loss of the traditional friction damper depends heavily on the friction coefficient between the relative sliding surfaces. In passive friction dampers, the maximum frictional resistance of the damper is a predetermined constant value during design. In the anti-seismic and wind-resistant design of building structures, if the friction damper is designed according to the situation under the action of strong vibra...

AI Technical Summary

Problems solved by technology

In the anti-seismic and wind-resistant design of building structures, if the friction damper is designed according to the situation under the action of strong vibration, the damper will not slide at all under the action of weak vibration, and the friction damper cannot eliminate energy. If the situation determines the sliding friction, the damper will not achieve the ideal vibration reduction effect under the action of strong vibration because the output tonnage is too small

Since the intensity of the earthquake action faced by the building structure cannot be accurately predicted, there is a problem that strong vibration and weak vibration cannot be taken into account when using this type of friction damper as a vibration-absorbing component in the building structure.

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