u-t slope type variable friction damper

Abstract

The invention discloses a U-T slope surface type variable friction damper. The damper includes multiple steel plates stacked together, at least one pair of adjacent steel plates respectively are provided with a U part slope surface and a T part slope surface, and the U part slope surface and the T part slope surface constitute a U-T slope surface mechanism; and planar contact are between the remaining adjacent steel plates, and among side surfaces to which the two adjacent steel plates are attached, the side surface of at least one steel plate is bonded with a friction material. The damper transforms axial deformation into normal deformation, and during a process of the axial deformation, the slope surfaces maintain continuous contact in the longitudinal direction, local "void" phenomenondoes not exist, and a whole slope plate is uniformly pressed. The damper can adjust additional stiffness generated by the damper as needed, can even achieve the effect of not adding the additional stiffness, is flexible in usage, and provides a larger selection space.

Description

technical field [0001] The invention relates to a damper, in particular to an anti-seismic variable friction damper, which belongs to the field of energy consumption and shock absorption control of building structures. Background technique [0002] With the continuous advancement of the urbanization process, urban buildings are becoming taller and denser, and earthquake disasters remind people time and time again that while ambitiously challenging the limits of various buildings, more attention must be paid to the seismic performance of building structures . All countries in the world have formulated relevant codes and guidelines for structural earthquake resistance according to their own economic development level and geographical environment conditions (whether they are near the earthquake zone), and with the improvement of their own economic development level, they have continuously improved the seismic requirements of building structures. my country's seismic codes have...

AI Technical Summary

Problems solved by technology

[0006] 1) The hysteresis curve of "pair triangle" or "dog bone shape" is not full enough, which limits its energy consumption capacity

[0007] 2) When the variable friction force is generated, the main variable friction mechanism is the "V-shaped slope" plate, one side of the slope is in close contact, while the other side of the slope is disengaged, causing the slope to bend and deform in the length direction , so that the bolt-spring preload in the disengagement area is lost, resulting in a smaller output of the damper

If the slope plate is thin or the bolt spacing is large, it may even cause inelastic deformation of the plate and cause the damper to fail

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