Self-resetting variable-damping variable-rigidity viscoelasticity and friction composite damper

Abstract

The invention belongs to the field of earthquake resistance and shock absorption of buildings, particularly relates to a self-resetting variable-damping variable-rigidity viscoelasticity and friction composite damper, and is suitable for the field of building new construction, reinforcement and repair. The damper comprises a first friction base plate and a second friction base plate which are oppositely and fixedly arranged and a viscoelastic damper arranged between the first friction base plate and the second friction base plate in the length direction; a first friction plate and a second friction plate are arranged on the two corresponding sides of the fixed end of the viscoelastic damper respectively; and the first friction plate and the second friction plate are correspondingly connected with the first friction base plate and the second friction base plate in a pressed mode. According to the self-resetting variable-damping variable-rigidity viscoelasticity and friction composite damper, an internal viscoelastic damper unit can perform energy dissipation and shock absorption on high-frequency-band and small-displacement seismic oscillation, and an external self-resetting variable-friction damper unit can perform energy dissipation and shock absorption on low-frequency-band and large-displacement seismic oscillation, so that the energy dissipation and shock absorption capacity of a single damper is improved, and the performance defect of a single energy dissipation mode can be overcome.

Description

technical field [0001] The invention belongs to the field of anti-seismic and shock absorption of buildings, and in particular relates to a self-resetting variable damping variable stiffness viscoelasticity and friction composite damper, which is suitable for the fields of new construction and reinforcement and repair of buildings. Background technique [0002] my country is an earthquake-prone country. When an earthquake occurs, not only the casualties are heavy in the affected areas, but the social and economic order is also severely damaged. In order to reduce the impact of earthquakes and protect the safety of buildings, personnel and property, it is necessary to use energy dissipation shock absorbers. [0003] Damper is currently the most widely used energy dissipation and shock absorption technology. Dampers are installed in new buildings or repaired after building earthquake damage to prolong the natural vibration period of the structure, increase the structural dampi...

AI Technical Summary

Problems solved by technology

Existing dampers with mature technology include viscoelastic dampers, friction dampers, metal dampers, etc. Although viscoelastic dampers and friction dampers are widely used, under the condition of large displacement vibration, viscoelastic dampers It is easy to tear between the viscoelastic material and the steel plate, and the friction damper has a problem of hysteresis under high-frequency vibration

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