Shape memory alloy energy dissipation shock absorber

Abstract

The shape-memory alloy energy-dissipating shock absorber includes symmetrically arranged mounting plates, said mounting plates are provided with multiple sets of first mounting holes, and symmetrically arranged first connecting plates and connecting structures are arranged between the symmetrically arranged mounting plates. With the symmetrically arranged damping structure, the connection structure is located between the symmetrically arranged first connecting plates. Using the above structure, the shock absorber made of shape memory alloy as the main structure, through the special phase transformation process of martensitic phase transformation and austenite phase transformation, when the structure vibrates, the vibration of the structure is adjusted through the phase transformation The generated energy is used for hysteretic energy consumption; the application of pre-strain can not only improve the stiffness of nodes, but also keep the shape alloy rods in a state of tension, effectively suppress the vibration response of the structure, and improve the energy dissipation capacity of the structure; The structure of the device is unique and reasonable, and it is designed for the cutting-edge material of shape memory alloy, making full use of its characteristics to reduce vibration and consume energy.

Description

technical field [0001] The invention relates to the technical field of structural energy dissipation and vibration reduction, in particular to a shape memory alloy energy dissipation shock absorber. Background technique [0002] In the current society, earthquakes are still one of the most important natural disasters that threaten the survival and development of our human society. Before the 1990s, steel frame rigid joints, that is, bolted and welded joints, were widely used in various steel structure fields because of their good plastic deformation capabilities. However, further investigations after the earthquake showed that such joints Even if it is not damaged in the earthquake, a large amount of participating deformation will occur. After research by many scholars, it has been found that in the original steel frame structure, adding energy-dissipating elements can effectively improve the energy-dissipating performance, stiffness, and ductility of the structure. , Signi...

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Problems solved by technology

However, due to the small elastic modulus of shape memory alloy martensite and austenite, although it can effectively reduce the residual deformation when used as a self-resetting element, the initial stiffness of the node directly connected by it is small. At the same time, the shape memory alloy The direct connection with the structure cannot give full play to its hysteretic performance, resulting in insufficient hysteretic energy consumption capacity of such nodes

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