Resettable large-deformation damper

Abstract

The invention belongs to the field of control over vibration of building structures, and particularly relates to a resettable large-deformation damper. The resettable large-deformation damper is defined by an upper plate, a lower plate, external curved energy-dissipation steel plates and an end plate, wherein the energy-dissipation way that the upper and lower plates tense and compress the external curved energy-dissipation steel plates, energy-dissipation soft partition steel plates, arc-shaped energy-dissipation steel plates, energy-dissipation end steel plates and semicircular connecting steel plates is adopted so that energy can be dissipated through self bending deformation, and moreover, all the components can mutually cooperatively rub and squeeze an elastic bonding filling materialand an energy-dissipation foamed aluminum material when relative displacement is generated. Connecting shafts drive energy-dissipation friction blocks and the energy-dissipation foamed aluminum material to be mutually rubbed for energy dissipation, so that the kinetic energy or the elastic potential energy or other energy of the structure is transformed into heat energy and energy in other formsto be dissipated; shape memory alloy wires and the combined energy-dissipation steel plates are cooperatively stressed, the shape memory alloy wires have a deformation recovery ability, so that a stable damping force and an automatic reset function are provided for vibration of the damper in the tension-compression direction, and during an earthquake, and the earthquake responses of a building structure are reduced.

Description

technical field [0001] The invention belongs to the field of vibration control of building structures, in particular to a resettable large deformation damper. Background technique [0002] Metallic yielding dampers are various forms of damping energy dissipators made of mild steel or other soft metal materials. Metals have good hysteretic properties after yielding, and some metals have elastic-plastic hysteretic deformation energy dissipation, including mild steel dampers, lead dampers, and shape memory alloys (SMA) dampers. The mechanism of lead damper and shape memory alloy damper to control the vibration of the structure is to dissipate part of the energy of the structural vibration through the yield hysteresis energy consumption of the metal, so as to reduce the structural response. The mild steel damper is sufficient It has good hysteresis characteristics after using mild steel to enter the plastic stage. In 1972, American scholars such as Kelly and Skinner first bega...

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Problems solved by technology

[0003] Because the external energy transmitted to the building structure due to earthquakes and other reasons is the root cause of the vibration of the structure, the energy dissipation properties of the damper will be the key to reducing the vibration response of the structure. The dampers currently researched and developed are prone to insufficient energy dissipation characteristics and The uncoordinated structure loses the restraint and anti-buckling effects, resulting in a significant reduction in its energy dissipation capacity

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