Shape-memory alloy stranded wire and ring spring assembled type self-restoring damper

A technology of ring springs and memory alloys, applied in protective buildings/shelters, building components, building types, etc., can solve the problems of poor fatigue resistance of viscoelastic dampers, poor resetting of friction dampers, and easy seepage of viscous dampers Leakage and other problems, to achieve the effect of good reset ability, improved energy consumption capacity, and flexible size selection

Active Publication Date: 2016-11-16
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional dampers that have been used in practical engineering have some limitations: viscoelastic dampers have poor fatigue resistance and are prone to aging; viscous dampers are prone to leakage; metal yield dampers are prone to large deformation and failure in strong earthquakes; friction Poor repositioning of the damper, etc.
The superelastic SMA wire used in the damper is prone to damage under the action of strong earthquakes, and the friction plate is difficult to reset after the vibration ends

Method used

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  • Shape-memory alloy stranded wire and ring spring assembled type self-restoring damper
  • Shape-memory alloy stranded wire and ring spring assembled type self-restoring damper
  • Shape-memory alloy stranded wire and ring spring assembled type self-restoring damper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A shape memory alloy stranded wire-annular spring assembled self-resetting damper, its structure schematic diagram is as follows Figure 1-Figure 8 As shown, it is composed of ring spring energy dissipator 1, inner sleeve 2, outer sleeve 3, disc 4 and four SMA strands 6 of the same size and specification. In the inner sleeve 2 of the groove, the inner sleeve 2 is above the outer sleeve 3 and inside the outer sleeve 3, the outer sleeve 3 and the inner sleeve 2 are arranged alternately, so that the SMA strand 6 is always in a tension state, and the inner sleeve 2. The upper end is fixedly connected to the central shaft 14, and the lower end of the outer sleeve 3 is fixedly connected to the guide shaft 7. Four SMA twisted wires 6 are arranged evenly along the same circumference of the disc 4 on the outside of the outer sleeve. The SMA twisted wires 6 pass through the holes on the disc 4 and are fixedly connected to the disc 4 through the clamp 5. The two discs 4 are respec...

Embodiment 2

[0076] A shape memory alloy stranded wire-annular spring assembled self-resetting damper, different from Embodiment 1, the structural schematic diagram of SMA stranded wire 6 is as follows Figure 9 As shown, the secondary SMA strands are processed from seven primary SMA strands, and the seven primary SMA strands are all processed from seven SMA wires 61 with the same diameter and the same specification.

[0077] In this embodiment, the secondary SMA stranded wire processed by the primary SMA stranded wire has better shock absorption effect, longer service life, and better self-resetting effect.

Embodiment 3

[0079] A shape memory alloy stranded wire-annular spring assembled self-resetting damper. The difference from the above embodiment is that the SMA stranded wire 6 is processed by superelastic SMA wire 61 . The initial state of superelastic SMA wire is austenite at normal ambient temperature, which can provide superelastic effect. The maximum recoverable strain of superelastic SMA reaches 6% to 8%. In the above strain range, the memory alloy material will not be damaged, and a hysteresis loop (superelastic hysteresis) with self-resetting characteristics can be formed to dissipate energy.

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Abstract

The invention provides a shape-memory alloy stranded wire and ring spring assembled type self-restoring damper. The damper comprises an energy dissipater, an inner sleeve, an outer sleeve, a disc and two or more SMA stranded wires. The energy dissipater is a ring spring energy dissipater arranged in the inner sleeve. The outer sleeve and the inner sleeve are arranged in a staggered mode so that the SMA stranded wires can be always in a tensioned state. One end of the inner sleeve is fixedly connected with a central shaft; one end of the outer sleeve is fixedly connected with a guide shaft; the central shaft and the guide shaft penetrate through a central hole of the disc; and the two or more SMA stranded wires are evenly arranged around the circumference of the disc and fixedly connected with the disc. The shape-memory alloy stranded wire and ring spring assembled type self-restoring damper has a good energy dissipation function and a good self-restoring function, and adapts to the situation that large displacement of a building structure is caused by strong earthquakes, super-strong wind and the like; and meanwhile, the structure of the damper is guaranteed to the maximum extent in the aspects of transportation and installation.

Description

technical field [0001] The invention belongs to the technical field of consumption shock absorption of civil engineering structures, in particular, the invention relates to a shape memory alloy strand-ring spring assembled self-resetting damper. Background technique [0002] The damage and collapse of buildings during earthquakes is the main cause of earthquake disasters. How to effectively reduce the response of engineering structures under earthquakes and improve the seismic capacity of structures is one of the problems to be solved urgently in the discipline of civil engineering. Structural anti-seismic is a kind of passive energy consumption, which resists earthquake action by enhancing the strength, stiffness and ductility of the structure itself, that is, the structure itself consumes seismic energy, which is uneconomical and difficult to achieve the desired effect. [0003] Passive energy dissipation vibration reduction has attracted much attention from the engineeri...

Claims

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Application Information

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IPC IPC(8): E04H9/02E04B1/98
CPCE04H9/021
Inventor庄鹏王文婷薛素铎
OwnerBEIJING UNIV OF CIVIL ENG & ARCHITECTURE