Large-deformation large-tonnage composite viscoelasticity damper

Abstract

An anti-knock device of large distortion and heavy load visco-elasticity damper is composed by a large distortion visco-elasticity damper and lead compacting damper. The large distortion visco-elasticity damper is put in the middle and surrounded by several lead compacting dampers with the top and bottom linked to the armor plate to from an integrated damper.

Description

technical field [0001] The invention is an anti-vibration (seismic) device for civil engineering structures, especially for the situation of large deformation and large tonnage. Background technique [0002] Earthquake force and wind vibration force are the main control loads borne by the building structure, and are also the main factors leading to the damage and collapse of the building structure. Accurately understand the force mechanism and dynamic response of the structure under the action of dynamic load, and implement reliable measures for it. Anti-vibration (earthquake) protection measures are a frontier research topic. Structural energy dissipation and vibration reduction control is a new type of anti-vibration (seismic) method, that is, using energy dissipation and vibration reduction devices to consume external excitation energy, so as to reduce the damage of external excitation to the main structure. At present, energy-dissipating vibration damping devices develo...

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Problems solved by technology

Fluid dampers use fluid motion to dissipate vibration energy, but bubbles are easily generated during the filling process, which leads to the necking of the energy consumption curve, and has the disadvantage of easy leakage and high cost; metal dampers and friction dampers are easy to manufacture , low cost, but its energy dissipation performance has hysteresis, which may adversely affect the acceleration response of the structure, and the energy dissipation performance of the metal damper is easily affected by various parameters such as metal characteristics and damper shape; viscoelasticity The damper is cheap in cost and strong in energy dissipation. It is one of the most widely used damping devices in engineering applications. However, its performance is greatly affected by the external environment temperature, and its deformation capacity is limited by the thickness of the viscoelastic layer, which has the disadvantage of small deformation. , generally the maximum deformation is only 60mm (300% strain amplitude), this is because the maximum thickness of the viscoelastic layer is 20mm, when the thickness is too large, the viscoelastic layer is prone to warping and instability Larger, the shear bearing capacity of the viscoelastic layer is reduced, and the tonnage of the damper is reduced. In order to expand the application range and applicable conditions of the viscoelastic damper, the deformation limit of the viscoelastic damper is increased, and the viscoelastic damping is increased. The damping force of the damper can reduce the influence of temperature on the viscoelastic damper. The patent of this invention combines the advantages of various dampers to develop a new composite viscoelastic damper with excellent performance, low price, and large deformation and large tonnage. device

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