Self-reposition friction energy dissipation support based on shape memory alloy

Abstract

A self-resetting frictional energy-dissipating support based on a shape memory alloy, comprising a first channel steel (1) and a second channel steel (2), the outer ends of the first channel steel (1) and the second channel steel (2) are respectively A round pipe (7) and a connecting plate (8) are connected in sequence; the opening of the first channel steel (1) is downward, and the opening of the second channel steel (2) is upward, and the two press the contact surface through the connecting piece (4) to provide Friction force; the left and right sides of the flange of the first channel steel (1) are respectively provided with four first bolts (5) equidistantly distributed, and the left and right sides of the flange of the second channel steel (2) are respectively provided with four second bolts ( 5‑1), the second bolts (5‑1) are symmetrically arranged in pairs relative to the central axis of the second channel steel (2); the shape memory is used between the first bolts (5) and the corresponding second bolts (5‑1) Alloy wires (3) are connected. The invention has simple structure, stable energy consumption performance, almost no residual deformation after unloading, and is easy to replace.

Description

technical field [0001] The invention relates to the technical field of structure damping, in particular to a self-resetting frictional energy dissipation support based on a shape memory alloy. Background technique [0002] Passive energy-dissipating devices have attracted much attention from the engineering community because of their simple structure, low cost, and easy maintenance. They are currently a mature and widely used vibration control technology. However, there are many shortcomings in the passive energy dissipation devices currently developed and applied, such as easy aging of viscoelastic dampers, difficult maintenance of viscous dampers, and irreversible plastic residual deformation of mild steel dampers. The friction damper has good energy dissipation capacity, and its energy dissipation performance is less affected by the load size, loading frequency and loading cycle times, but it does not have the self-resetting function like the other passive dampers above, ...

AI Technical Summary

Problems solved by technology

However, the passive energy dissipation devices currently developed and applied have many disadvantages, such as the viscoelastic damper is easy to age, the viscous damper is difficult to maintain, and the plastic residual deformation of the mild steel damper is not recoverable, etc.

The friction damper has good energy dissipation capacity, and the energy dissipation performance is less affected by the load size, loading frequency and loading cycle times, but it does not have the self-resetting function like other passive dampers above, and there is residual displacement after the earthquake

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