Variable-damping variable-rigidity viscoelasticity-friction composite damping device

Abstract

The invention discloses a variable-damping variable-rigidity viscoelasticity-friction composite damping device. The variable-damping variable-rigidity viscoelasticity-friction composite damping devicecomprises two symmetric cylinder type viscoelasticity damping device units and two cylinder type friction damping device units, the friction damping device units sleeve the outer sides of the cylinder type viscoelasticity damping device units, the cylinder type viscoelasticity damping device units sequentially comprise annular inner steel cylinders, annular viscoelasticity material layers and annular middle steel cylinders from inside to outside, elastic elements are sleeved with the middles of the annular inner steel cylinders, closed steel plates are mounted on two ends of the annular innersteel cylinders, cylinder viscoelasticity materials are mounted on inner sides of two ends of the annular middle steel cylinders, connecting anchorage steel plates are mounted on two ends of the annular middle steel cylinders, the friction damping device units sequentially comprise annular middle steel cylinders, annular friction pieces, annular friction plates and annular outer steel cylinders from inside to outside, the annular friction plates comprise first annular friction plates and second annular friction plates, and each annular outer steel cylinder is formed through connecting of an upper half annular outer steel cylinder and a lower half annular outer steel cylinder through bolt assembling.

Description

technical field [0001] The invention relates to a damper, in particular to a viscoelasticity-friction composite damper with variable damping and variable stiffness, which belongs to the technical field of energy dissipation and shock absorption. Background technique [0002] Both viscoelastic and friction dampers are the most commonly used dampers in civil engineering. The traditional viscoelastic damper is a damper suitable for anti-wind vibration and small earthquake, it can start to dissipate energy under small displacement, and has good fatigue performance and energy dissipation performance. The traditional friction damper can only provide constant friction, and the damping force cannot change significantly with the increase of displacement. It provides different damping force characteristics, and the phenomenon of wear and fatigue is serious under long-term repeated small displacement (wind vibration and small earthquake). When the sliding force value of the friction ...

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Problems solved by technology

[0003] The object of the present invention is to solve the problems existing in the existing friction damper, and provide a variable damping and variable stiffness viscoelasticity-friction composite damper, which has the technical advantages of the viscoelastic damper and the variable coefficient friction damper at the same time. It can effectively reduce the vibration response of the structure under small earthquakes and wind vibrations, and enable the damper to produce good energy dissipation capacity under moderate earthquakes and large earthquakes, and has the advantage of good fatigue performance

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