Self-resetting displacement magnification type shape memory alloy damper

Abstract

The invention belongs to the technical field of civil engineering and provides a self-resetting displacement magnification type shape memory alloy damper. By the self-resetting displacement magnification type shape memory alloy damper, small displacement generated at a beam-column joint or between structural layers of a building structure under the action of an external load can be magnified according to requirements, and the magnified displacement is limited in order to give full play to energy dissipation capacity of a shape memory alloy material in the damper, so that favorable energy dissipation effects can be achieved; namely, when the small displacement is generated at the beam-column joint or between the structural layers of the building structure, the displacement is magnified through a lever mechanism and then transferred to shape memory alloy wires, and the ultra-elastic shape memory alloy material dissipates energy by tensile deformation. The displacement magnification can be adjusted according to practical conditions of building structures of building components, simplicity in mounting is realized, and the shape memory alloy damper is a flexible and efficient energy dissipation element.

Description

technical field [0001] The invention provides a self-resetting and amplifying displacement shape memory alloy (SMA) damper, which can amplify the small relative displacement generated at the beam-column node or between the structural layers of the building structure under the action of external load as required, by limiting The amplified displacement gives full play to the energy dissipation capacity of the superelastic shape memory alloy (SMA) material and consumes seismic energy. The invention is suitable for vibration reduction control of engineering structures and belongs to the technical field of civil engineering. Background technique [0002] A building structure will respond when it is disturbed or stimulated by the outside world, because the excitation makes the system obtain energy input. At the same time, the system can convert the input energy into heat energy or other energy forms through a certain mechanism and consume it, so that the input energy and the cons...

AI Technical Summary

Problems solved by technology

[0005]The traditional SMA passive damper utilizes the superelasticity and high damping characteristics of SMA to dissipate vibration energy, but the disadvantage is that the recoverable strain of SMA (6% -8%), so the SMA damper in this design uses the principle of leverage to amplify the displacement and transmit it to the SMA cable, giving full play to the superelastic hysteretic energy dissipation characteristics of SMA

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