Sliding friction damper for bridge

Abstract

The invention discloses a sliding friction damper for a bridge. The sliding friction damper for the bridge comprises an open sliding groove, a sliding upper unit, a sliding friction unit, two adjusting nuts and two butterfly-shaped springs. The open sliding groove comprises a sliding groove bottom plate and sliding groove side plates, the sliding groove bottom plate and the sliding groove side plates are integrally formed, and the inner side faces of the sliding groove side plates are friction faces; the sliding upper unit comprises a notch plate and a notch seat plate, the notch seat plate is welded to the notch plate, and an open groove is formed in the end, away from the notch plate; the sliding friction unit comprises a cylindrical center rod, the cylindrical center rod is perpendicular to the notch seat plate and located in the open groove of the notch seat plate, gaps are reserved between the cylindrical center rod and the two side walls of the open groove of the notch seat plate; the two adjusting nuts are symmetrically located on the two sides of a notch of the opening groove; the two butterfly-shaped springs are symmetrically arranged on the outer sides of the adjusting nuts; outer side surfaces of two circular friction retainer plates are friction faces; and the sliding friction unit and the notch seat plate are embedded in the open sliding groove. According to the sliding friction damper for the bridge, the structure is simple, machining is convenient, performance is stable, and the sliding friction damper for the bridge can be used for damping controlling of a long-span bridge structure.

Description

technical field [0001] The invention relates to the technical field of structural vibration control, in particular to a sliding friction damper for bridges. Background technique [0002] Sliding friction damper is a passive damping control measure that utilizes frictional energy dissipation mechanism to dissipate energy. The friction damper is a displacement damper, and its characteristic is that the friction force is only related to the contact pressure and friction coefficient between the friction surfaces. Existing tests have shown that the hysteresis loop of this type of damper is full and the energy dissipation capacity is strong, and its hysteresis curve is generally rectangular. Since it is a displacement damper, it is generally arranged in a part of the structure with relatively large deformation. [0003] So far, sliding friction dampers have not been used in bridges and other fields. Contents of the invention [0004] The object of the present invention is to ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a sliding friction damper for bridges, to solve the problem of how to use the sliding friction damper to improve the seismic performance of bridges

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