Two-stage hybrid energy dissipation shock absorber

Abstract

The invention discloses a two-stage mixed type energy dissipation and shock absorption device. The two-stage mixed type energy dissipation and shock absorption device comprises an upper steel board, a lower steel board, flange steel boards, two metal dampers, holding-on pieces and viscoelastic materials, wherein the two metal dampers are displaced at the upper and lower positions, one metal damper is located between the upper steel board and one flange steel board, the other metal damper is located between the other flange steel board and the lower steel board, the two metal dampers are connected through the holding-on pieces, and the positions between one flange steel board and the upper steel board and between the other flange steel board and the lower steel board are filled with the viscoelastic materials. In the first stage of work, under the wind load and small earthquakes, the relative displacement of the upper steel board and the lower steel board is smaller than intervals in the holding-on pieces, the metal dampers can not be driven to work, shear deformation occurs in the viscoelastic materials to consume energy, the metal dampers keep elastic, the device focuses on providing damping, the accelerated speed of the structure is effectively decreased, and the displacement response is effectively reduced; in the second stage of work, under middle earthquakes and large earthquakes, the relative displacement of the upper steel board and the lower steel board is greater than the intervals in the holding-on pieces, the metal dampers are driven to work with the viscoelastic materials, the stiffness and damping force of the device are increased remarkably, and the displacement response under middle and large earthquakes can be effectively reduced.

Description

technical field [0001] The invention relates to a two-stage hybrid energy dissipation and shock absorption device, which belongs to the field of energy dissipation and shock absorption of building structures. Background technique [0002] At present, the commonly used energy dissipation and shock absorbing devices are divided into two categories: velocity-dependent type and displacement-dependent type. Different types of energy dissipation and shock absorbing devices have different characteristics, applicable stages and scopes. Velocity-dependent dampers (viscous dampers, viscoelastic dampers, etc.) mainly provide damping, because they start to consume energy once there is a relative displacement, so they are suitable for resisting wind loads and small earthquakes, and basically do not provide Stiffness will not cause an increase in the acceleration response of the structure, and the damping provided can effectively reduce the various responses of the structure to ensure th...

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Problems solved by technology

Therefore, when using energy-dissipating shock-absorbing devices, it is difficult to achieve a good state of the structure under different stages (wind load, small earthquake, moderate earthquake and large earthquake) by using a damper with a single energy-dissipating mechanism.

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