Self-resetting corrugated variable friction damper

Abstract

The invention discloses a self-resetting corrugated variable friction damper, which mainly comprises an inner pipe, an outer pipe, a friction assembly, a spiral spring, belleville springs and an associated assembly. The inner pipe is a solid circular pipe made of steel, and the pipe diameter of the middle of the inner pipe is increased; the outer pipe is combined by two semi-circular pipes with flat plate joints, and bolt holes are formed in flat plates; the middles of the inner pipe and the outer pipe are provided with mutually-matched corrugated sections, and the corrugated sections of the inner pipe and the outer pipe are pasted with friction materials or machined friction faces to constitute the friction assembly jointly. The spiral spring is axially pressed and provides the self-resetting capacity; the belleville springs are additionally arranged on high-strength bolts to radially provide the self-resetting capacity; the damper has the variable friction characteristic, under medium and small earthquakes, friction force is small, the displacement stroke is large, under large earthquakes, the friction force is sharply increased, the displacement stroke is decreased, and the energy-dissipating capacity under different earthquake conditions is ensured; and compared with a damper of the same type, the ultimate bearing capacity of the damper is larger, durability is good, and the using range is wide.

Description

technical field [0001] The invention belongs to the field of vibration reduction control of civil structures (including rocking structures, self-resetting structures and high-rise structures, etc.), and relates to a self-resetting corrugated variable friction damper. Background technique [0002] At present, the commonly used vibration control methods mainly include passive control, active control and semi-active control, etc. Among them, passive control is the most widely used because of its simple structure, low manufacturing and maintenance costs. Common passive control devices include friction dampers, metal dampers, viscous dampers, viscoelastic dampers, etc. However, there are oil leakage problems in viscous damper engineering, and viscoelastic dampers have poor fatigue resistance and poor durability under earthquake action. [0003] In response to the "resilient urban and rural" requirements proposed by our country, the recoverable functional structure will be a majo...

AI Technical Summary

Problems solved by technology

At present, the recoverable functional structure mainly uses prestressed steel bars or shape memory alloys to provide self-resetting ability. The prestressed steel bars have insufficient elastic deformation capacity, and the performance of shape memory alloys is greatly affected by temperature.

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