A square sleeve type self-resetting metal friction damper

Abstract

The invention discloses a square sleeve type self-reset metal friction damper. The square sleeve type self-reset metal friction damper comprises an outer sleeve and an inner cylinder arranged in the outer sleeve, the damper is connected with an external structure through connecting rods at the two ends, wherein the connecting rod at one end penetrates through the one end of the outer sleeve and isconnected with one end of the inner barrel, and the connecting rod at the other end is connected with the other end of the outer sleeve; and a reset spring is further arranged between the other end of the inner barrel and the other end of the outer sleeve, and a friction structure is arranged between the outer sleeve and the inner barrel. According to the square sleeve type self-reset metal friction damper, metal friction energy dissipation and SMA spring energy dissipation are achieved, damping force is increased by forming grooves in the inner barrel and forming bolt holes in the outer sleeve, and the self-reset function during the two states of being pressed and being pulled by hands is achieved; and the square sleeve type self-reset metal friction damper is simple in manufacturing, reasonable in stress, large in damping force, large in initial stiffness, large in energy dissipation capacity, low in price, stable in vibration reduction and energy dissipation and good in durability.

Description

technical field [0001] The invention relates to a square sleeve type metal damper, which belongs to the field of engineering structure vibration reduction control Background technique [0002] Earthquakes have brought huge disasters to human beings all over the world. How to effectively control the damage and collapse of building structures under the action of earthquakes is an urgent problem to be solved in the field of seismic research of engineering structures. At present, there are mainly several vibration control methods such as passive control, active control and semi-active control. Passive control equipment is simple in structure, low in cost, easy to maintain and does not require external energy. It is a widely used earthquake vibration control method. Passive control mainly includes vibration isolation pads, hydraulic dampers, liquid viscoelastic dampers, mass tuned dampers and so on. However, the vibration isolation pad has the problem of rubber aging, and the l...

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Problems solved by technology

However, the vibration isolation pad will have the problem of rubber aging, the processing and production of the liquid viscous damper is difficult, the price is high, and there is a problem of oil leakage.

The natural vibration frequency of the mass-tuned damper is far from the natural frequency of the main structure, which causes the problem of poor vibration control effect. The viscoelastic damper has poor fatigue resistance under the action of earthquake reciprocating load, and the viscoelastic material is durable. Disadvantages of poor sex

There is also a friction damper, which has low initial stiffness and low bearing capacity, and has the problem of poor self-resetting function under the action of a large earthquake

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