Axial variable-stage friction damper for building
By designing an axial deformation stage friction damper, and utilizing a limiting structure and connecting components to achieve the order switching of the friction plate, the problem of unstable mechanical performance of dampers in the prior art after rare earthquakes is solved, providing stable multi-stage damping force output, reducing costs and improving safety performance.
Patent Information
- Application Number
- CN202423145004.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-19
AI Technical Summary
Existing metal friction dampers for buildings exhibit unstable and unreliable mechanical properties and poor safety performance after experiencing rare earthquakes or fatigue. They also lack the ability to adjust damping force under multi-stage displacement.
An axial deformation stage friction damper for building applications was designed. Through specific limiting structures and connecting components, including bolts, butterfly washers, and nuts, the order of friction plates can be switched to ensure effectiveness under different displacements. The damping force is enhanced through the coordinated work of the two friction plates.
It provides stable damping force output at different displacement stages, reduces production and construction costs, ensures stable output increase of the damper under extremely rare earthquakes, protects the safety performance of connecting parts and adjacent structures, and maintains the stability and reliability of mechanical properties.
Smart Images
Figure CN223647252U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of building friction damper, and specifically relates to an axial type variable stage friction damper for building. BACKGROUND
[0002] The building metal friction damper consumes the input energy through the friction sliding between components, and is adopted by engineering due to the characteristics of simple structure, stable performance and large damping force. For the structure with the friction damper, under the action of normal use load, the friction damper provides additional stiffness to the structure and does not slide itself; under the action of medium and large earthquakes, the friction damper generates friction sliding to do work and consume and absorb the input energy of the earthquake, and provides additional damping to the structure, thereby reducing the structural response. The existing building metal friction damper only has one stage of displacement, and after experiencing rare earthquakes or fatigue, the mechanical properties are not stable and reliable, and the safety performance is poor. SUMMARY
[0003] The utility model aims at at least one of the technical problems in the related art to some extent.
[0004] Therefore, the utility model adopts the technical scheme, which is an axial type variable stage friction damper for building, comprising two interval arranged outer plates, two T-shaped plates are arranged between the two outer plates, the two T-shaped plates are arranged in axial symmetry, the outer plate is provided with a circular through hole and a strip-shaped through hole, the T-shaped plate comprises a horizontal plate and a vertical plate connected with the horizontal plate, the two sides of the vertical plate are attached with friction plates, the vertical plate is provided with a first strip-shaped hole, the friction plate is provided with a second strip-shaped hole, the positions of the first strip-shaped hole and the second strip-shaped hole correspond to each other, the vertical plate, the friction plate and the outer plate are connected through a connecting assembly, the connecting assembly comprises a bolt, a butterfly elastic pad and a nut, the bolt is connected with the nut after being threaded through the corresponding circular through hole, the first strip-shaped hole, the second strip-shaped hole and the butterfly elastic pad, the vertical plate is provided with an intermediate limiting block, the intermediate limiting block is threaded through the friction plate and then threaded in the strip-shaped through hole.
[0005] Each vertical plate is provided with two groups of connecting assembly groups, each group of connecting assembly groups comprises three connecting assemblies arranged at intervals, and an intermediate limiting block is arranged between the adjacent two connecting assemblies.
[0006] Compared with the prior art, the utility model has the following beneficial effects: the utility model discloses the structure of specific spacing makes it start to take effect under different displacement.Compared with the previous ordinary structure, the production cost, construction cost are greatly reduced, and can show the output of two different orders completely;The utility model discloses the output of a value when the displacement of a stage;When the displacement of more than a stage, the second order friction plate participates in the work, and the output of damper is promoted;The utility model discloses the output of damper under the super-rare earthquake of the damper is stable controllability of the increase of amplitude, namely should not exceed 10% of the damping force of damper design, thereby effectively protecting the connecting piece, embedded part and adjacent substructure bearing safety of damper matching;The product mechanical property is still stable and reliable after damper experiences rare earthquake and fatigue, and the safety performance is better. BRIEF DESCRIPTION OF DRAWINGS
[0007] Figure 1 It is the structural schematic diagram of the utility model;
[0008] Figure 2 It is the structural schematic diagram of T type board and friction plate cooperation;
[0009] Figure 3 It is the structural schematic diagram of outer plate;
[0010] Figure 4 It is Figure 1 The side view of DETAILED DESCRIPTION
[0011] In order to make the purpose, technical scheme and advantage of the present application more clear, the following is further described in detail in combination with the drawings and examples.The specific examples described here are only used to explain the present application, and are not used to limit the present application.
[0012] On the contrary, the present application covers any alternative, modification, equivalent method and scheme defined by the claims on the essence and scope of the present application.Further, in order to make the public better understand the present application, some specific details are described in the following detailed description of the present application.The present application can also be completely understood without the description of these details for those skilled in the art.
[0013] Referring to Figures 1 to 4A friction damper for axial deformation stage in construction includes two spaced-apart outer plates 1, with two T-shaped plates 2 arranged axially symmetrically between them. The outer plates 1 have circular through holes 101 and strip-shaped through holes 102. Each T-shaped plate 2 includes a horizontal plate 201 and a vertical plate 202 connected to the horizontal plate 201. Friction plates 3 are attached to both sides of the vertical plate 202. The vertical plate 202 has a first strip-shaped hole, and the friction plates 3 have a second strip-shaped hole 3. 01. The positions of the first strip hole and the second strip hole 301 are corresponding. The vertical plate 202, the friction plate 3 and the outer plate 1 are connected by a connecting assembly. The connecting assembly includes a bolt 4, a butterfly spring washer 5 and a nut 6. The bolt 4 passes through the corresponding circular through hole 101, the first strip hole, the second strip hole 301 and the butterfly spring washer 5 and is connected to the nut 6. The vertical plate 202 is provided with an intermediate limiting block 302. The intermediate limiting block 302 passes through the friction plate 3 and is inserted into the strip through hole 102.
[0014] The intermediate limiting block 302 can move along the strip-shaped through hole 102.
[0015] Each vertical plate 202 is provided with two sets of connecting component groups. Each set of connecting component groups includes three connecting components arranged at intervals. An intermediate limiting block 302 is provided between two adjacent connecting components.
[0016] In practical application, the two horizontal plates 201 of the two T-shaped plates 2 are connected to the building components respectively. When the damper's stroke is small, only one friction plate moves first, and the damper is in the first-order energy dissipation function. When the damper's stroke increases beyond the first-order displacement, the second friction plate participates in the movement, forming the second-order energy dissipation function; at this time, the damper reaches the optimal additional damping ratio. In the first stage of the stroke, one friction plate is active, and the damping force is small; when the displacement exceeds the first stage, the damper is activated by both friction plates simultaneously.
[0017] This invention utilizes a specific limiting structure to activate the damper under different displacements. Compared to previous conventional structures, it significantly reduces production and construction costs and fully demonstrates two different levels of output. The output of this invention is a single value at the first-order displacement; beyond the first-order displacement, the second-order friction plate engages, increasing the damper's output. The damper described in this invention maintains stable and controllable output increases under extremely rare earthquakes, meaning it should not exceed 10% of the damper's design damping force, thus effectively protecting the load-bearing safety of the damper's connecting parts, embedded parts, and adjacent substructures. Even after experiencing rare earthquakes and fatigue, the damper's mechanical properties remain stable and reliable, resulting in superior safety performance.
Claims
1. An axial stage-variable friction damper for a building, characterized by: The utility model provides a kind of outer plate, it includes two interval settings, two outer plates (1) are provided with two T-shaped plates (2) between two outer plates (1), two T-shaped plates (2) are symmetrically arranged, outer plate (1) is provided with circular through-hole (101) and strip through-hole (102), the T-shaped plate (2) includes horizontal plate (201) and vertical plate (202) connected with horizontal plate (201), the both sides of vertical plate (202) are attached with friction plate (3), vertical plate (202) is provided with first strip hole, friction plate (3) is provided with second strip hole (301), the position of first strip hole and second strip hole (301) is corresponding, vertical plate (202), friction plate (3) and outer plate (1) are connected by connecting assembly, the connecting assembly includes bolt (4), butterfly elastic pad (5) and nut (6), bolt (4) is threaded through corresponding circular through-hole (101), first strip hole, second strip hole (301), butterfly elastic pad (5) and is connected with nut (6) after, the vertical plate (202) is provided with intermediate limiting block (302), intermediate limiting block (302) is threaded through friction plate (3) and is threaded in strip through-hole (102).
2. A building axial phase-variable friction damper according to claim 1, characterized in that: Each vertical plate (202) is provided with two groups of connecting assembly groups, each group of connecting assembly groups includes three connecting assemblies sequentially spaced, and an intermediate limiting block (302) is arranged between the adjacent two connecting assemblies.