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A self-resetting sliding friction damper based on sma

A sliding friction and damper technology, applied in the directions of screws, shockproof, threaded fasteners, etc., can solve the problems of stress loss, difficulty in controlling the degree of prestressed tension, and the lack of energy dissipation capacity of prestressed steel strands. The effect of high initial stiffness and good energy dissipation capacity

Active Publication Date: 2021-07-30
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has some disadvantages, such as: the degree of prestressed tension is not easy to control; stress loss and relaxation problems; prestressed steel strand itself has no energy dissipation capacity, etc.

Method used

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  • A self-resetting sliding friction damper based on sma
  • A self-resetting sliding friction damper based on sma
  • A self-resetting sliding friction damper based on sma

Examples

Experimental program
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Effect test

Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] like Figure 1-6 Described, a kind of based on SMA self-resetting sliding friction damper, the application method of this damper is as follows: cover plate (2), the second slope (10) and bolt hole (11) on the cover plate, center splint (3 ), the first bevel (8) and the slotted hole (9) on the central splint, the SMA bolt (1), the threaded section (5) on the SMA bolt, the weakened section (6), the transition section (7), etc. Prefabricated in the factory and then transported to the construction site.

[0029] First install the cover plate (2) and the center splint (3), so that the second slope (10) on the cover plate (2) is fully in contact with the first slope (8) on the center splint (3). In order to prevent the wear and rust of the inclined surfaces, lubricant can be applied between the inclined surfaces according to actual needs. Then pas...

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Abstract

The invention discloses a self-resetting sliding friction damper based on SMA. SMA bolts are used to connect the cover plate and the center splint. Slide inwards or outwards horizontally, and the inclined surface drives the cover to move outwards, so that the SMA bolts are pulled. The energy dissipation capacity of the damper is composed of two parts, frictional energy dissipation between inclined planes and SMA bolt deformation energy dissipation. By adjusting the inclination angle of the inclined plane during design, the proportional relationship between the deformation of the damper and the deformation of the SMA bolt under tension is changed, so as to realize the amplification of the displacement. During the deformation process of the damper, other components except the SMA bolts are in the elastic stage, and the SMA bolts will not have residual deformation during the loading and unloading process of the damper due to the unique superelasticity of the SMA material itself. The damper has a high initial stiffness by preloading the SMA bolts.

Description

technical field [0001] The invention relates to a self-resetting sliding friction damper based on SMA (shape memory alloy), which belongs to the technical field of structural energy dissipation and shock absorption in civil engineering. Background technique [0002] Earthquakes are extremely destructive to civil engineering. How to improve the earthquake resistance of civil engineering is an important challenge for the development of modern civil engineering. With the frequent occurrence of earthquake disasters in recent years, new requirements are put forward for the anti-seismic ability of buildings in the construction of construction projects. The traditional anti-seismic structure of the building consumes the seismic energy through the deformation of the building's own components. However, this will cause permanent damage to the building's own structure and cause serious economic losses. By adding damper components to the building structure, using the damper instead of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/98E04H9/02F16B35/04
CPCE04B1/98E04H9/021F16B35/04
Inventor 邱灿星刘家旺杜修力
Owner BEIJING UNIV OF TECH
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