Counterweight lever type negative stiffness friction damper
A technology of friction damper and negative stiffness, which is applied in the direction of protective buildings/shelters, building types, buildings, etc., can solve the problems of increasing structural seismic response, affecting structures, and occupying structural space, so as to reduce structural stiffness and expand Application prospects, the effect of long travel
Active Publication Date: 2021-10-26
BEIJING UNIV OF TECH +1
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Problems solved by technology
At present, shock absorption technology can effectively improve the seismic performance of the structure, but the traditional shock absorption technology needs to arrange dampers on more floors, which occupies a large amount of structural space and affects the use of the structure.
[0003] At present, the existing dampers can effectively improve the structural damping, thereby improving the seismic performance of the structure, but in some cases, it will increase the additional stiffness of the structure, and the increase of additional stiffness will increase the seismic response of the structure
Method used
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[0034] Attached below Figure 1-13 The structure and operating principle of the counterweight lever type negative stiffness friction damper of the present invention are further described.
[0035] like Figure 1-11 As shown, a counterweight lever type negative stiffness friction damper of the present invention, the damper includes a top steel plate 1, a bottom steel plate 2, a side support plate 3, a counterweight 4, a first-stage lever 5, a connecting rod 6, a second Secondary lever 7, rotating rod 8, friction plate 9, friction plate 10. like figure 1 as well as Figure 5-Figure 6 As shown, the top steel plate 1, the bottom steel plate 2 and the side support plate 3 are welded to form the outer shell of the damper, and the side support plate 3 and the bottom steel plate 2 are welded and connected. like image 3 As shown, the first stage lever 5, the connecting rod 6, and the second stage lever 7 are hinged to form a secondary lever system. The counterweight 4 is placed ...
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The invention relates to a counterweight lever type negative stiffness friction damper, which belongs to the technical field of vibration control. Including top steel plate, bottom steel plate, side support plate, counterweight, first level lever, connecting rod, second level lever, rotating rod, friction plate, friction plate. In the initial state, the gravity of the counterweight is amplified for the first time through the first-level lever, and the amplified gravity is transmitted to the second-level lever through the connecting rod for the second amplification, and the amplified gravity is squeezed vertically through the rotating rod Friction plate; when the damper enters the working stage, the friction plate deviates from the equilibrium position, and the rotating rod produces a horizontal component that causes the damper to deviate from the equilibrium position, that is, a negative stiffness force is generated; at the same time, because the rotating rod has a vertical component perpendicular to the friction plate, the It generates friction, provides frictional damping, and both act together to produce a hysteresis curve with negative stiffness characteristics. The invention can reduce the structural rigidity and improve the structural damping at the same time, and has very broad application prospects.
Description
technical field [0001] The invention relates to a counterweight lever type negative stiffness friction damper, which can be applied to the vibration reduction control of engineering structures and belongs to the technical field of vibration control. Background technique [0002] my country is a country with frequent earthquakes. The collapse of buildings during earthquakes is the main cause of casualties. Therefore, people have put forward higher requirements for the anti-seismic technology of building structures. At present, shock absorption technology can effectively improve the seismic performance of the structure, but the traditional shock absorption technology needs to arrange dampers on more floors, which occupies a large amount of structural space and affects the use of the structure. [0003] At present, the existing dampers can effectively improve the structural damping, thereby improving the seismic performance of the structure, but in some cases, it will increase ...
Claims
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IPC IPC(8): E04B1/98E04H9/02
CPCE04B1/98E04H9/021
Inventor 孙天威彭凌云官亚西
Owner BEIJING UNIV OF TECH