SMA (shape memory alloy) bar assembled self-resetting damper

Abstract

The invention discloses an SMA (shape memory alloy) bar assembled self-resetting damper, belonging to the field of buildings. The damper comprises a first restraining plate, a second restraining plate, a bottom plate, a core plate, an upper cover plate, a lower end plate, SMA bars and a dissipative cell; the lower ends of the first restraining plate and the second restraining plate are fixedly connected with the bottom plate, ribbed angle steel plates are fixedly arranged at the inner sides of the first restraining plate and the second restraining plate, and a connecting plate is fixedly arranged at the lower surface of the bottom plate; the core plate is located between the first restraining plate and the second restraining plate, an upper driving block and a lower driving block are fixedly arranged on the core plate, the upper cover plate penetrates the core plate and is located above the first restraining plate, the second restraining plate and the upper driving block, the lower endplate penetrates the core plate and is located below the lower driving block and the two ribbed angle steel plates, and the SMA bars penetrate the upper cover plate and the lower end plate and are fixed; the dissipative cell is located between the first restraining plate and the second restraining plate and is fixed. The SMA bar assembled self-resetting damper, provided by the invention, has highshock resistance and high stability, and ensures the energy dissipation and self-resetting ability of the SMA bars under the two states of pulling and pressing.

Description

technical field [0001] The invention relates to the construction field, in particular to an SMA rod-assembled self-resetting damper. Background technique [0002] Damper is a device that provides movement resistance and consumes movement energy. It is used in structural engineering such as buildings, bridges, and railways to improve the anti-seismic and shock-absorbing performance of building structures. [0003] Traditional dampers have complex structures and are mostly made of metal, rubber, steel gaskets and other materials. The stability and durability of these materials are poor. Although the structure does not collapse after the earthquake, it has a large residual deformation after the earthquake and cannot continue to use. [0004] Superelastic shape memory alloys (shape memory alloys, SMA) are materials with shape memory effects, superelasticity and high damping properties, as well as energy dissipation and self-resetting capabilities. The recoverable strain of nick...

AI Technical Summary

Problems solved by technology

The current dampers often use SMA wires (such as Chinese patent document CN206477464U), but due to the small diameter of SMA wires, it is inconvenient to install and use, the yield force produced is small, easy to break, and there is a large deformation or Destroyed and needs to be replaced with a new damper, expensive to replace Not suitable for use as a civil engineering damper

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