A wall-type stepped friction damper

Abstract

The present invention discloses a wall-type stepped friction damper, comprising five parts: a wall-connected top plate, a wall-connected bottom plate, a wall-connected bolt, a connecting rod for connecting the top and bottom plates, and several energy-dissipating components for dissipating energy; the damper is installed in the damping wall of the building structure; the wall-connected top plate, the wall-connected bottom plate, the wall-connected bolts and the connecting rods play the role of the damping wall and energy-dissipating components of the building body and ensure the normal operation of the damper as a whole; wherein the energy-dissipating components include friction plate I, pre-tightening bolts, springs, friction plate II, and limit plates, and the energy-dissipating components realize energy dissipation through the friction between friction plate I and friction plate II, wherein the pre-tightening bolts are used to provide positive pressure between the friction plates, and reset is achieved through the spring, so as to achieve multiple energy dissipation. The present invention uses several energy-dissipating components to dissipate energy through friction, and by designing top plate protrusions and energy-dissipating components with different spacings, different numbers of energy-dissipating components work under different earthquake types, and the function of step energy dissipation is realized.

Description

Technical Field

[0001] The invention relates to a wall type damper used for building energy consumption, in particular to a wall type stepped friction damper, belonging to the field of building structure shock absorption. Background Art

[0002] Friction damping uses the principle of tribology to dissipate the energy input into the structure due to ground vibration. In building structures, the use of friction dampers for shock absorption can effectively reduce the damage caused by earthquakes to building structures. A general friction damper includes a middle steel plate and pads on both sides, and energy is dissipated through friction between the steel plate and the pads. However, in practical applications, the vibration magnitude and direction of different types of earthquakes vary. A single friction damper is difficult to meet the shock absorption requirements of different types of earthquakes and has poor shock absorption performance. For example: The assembled steel plate shear wall with damper proposed by China Building Standard Design Institute (China Building Standard Design Institute Co., Ltd. Assembled energy-absorbing steel plate shear wall frame with annular damper and its construction method: CN202010772588.8[P]. 2020-11-24.) uses an annular damper that dissipates energy through the friction of the steel plate and cannot generate different damping forces with the magnitude of the ground motion. The magnitude of its Coulomb friction force is a fixed value; Beijing University of Technology (Beijing University of Technology. A wall-type self-resetting sliding friction damper: CN202 111482775.3[P].2022-03-22.) proposed a self-resetting sliding friction damper, which can restore a certain residual deformation of the damper after an earthquake, but the damping force provided by the friction of the steel plate is still a fixed value and cannot change with the magnitude of the earthquake; the wall damper node proposed by Xi'an University of Architecture and Technology is similar to it (Xi'an University of Architecture and Technology. An ancient building wooden wall with a self-resetting node friction damper installed between walls: CN202123158658.X[P].2022-05-10.).

[0003] The present invention proposes a friction type stepped damper, which provides friction damping forces of different magnitudes under different earthquake effects by setting different groove sizes. The damper is easy to install and can meet the needs of actual engineering projects. Summary of the invention

[0004] The present invention aims to provide a damper for shock absorption and energy dissipation of building structures, and can provide corresponding energy dissipation capabilities for different earthquake types.

[0005] The present invention overcomes the shortcomings of the prior art, realizes stepped friction energy dissipation, and can achieve the required friction force by adjusting the pre-tightening bolts. The present invention is installed in the middle of the damping wall of the building body, and can adjust the friction force of each step by adjusting the pre-tightening bolts and springs in each energy dissipation component. By designing top plate protrusions with different spacings and 6 energy dissipation components, different numbers of energy dissipation components can be operated under different vibration sizes, achieving the effect of stepped energy dissipation.

[0006] The invention provides a wall-type stepped friction damper, comprising a wall-connecting top plate, a wall-connecting bottom plate and wall-connecting bolts for connecting a damping wall of a building main body, a connecting rod for connecting the top and bottom plates, and a plurality of energy-dissipating components for dissipating energy; the damper is installed in the damping wall of the building main body; the wall-connecting top plate, the wall-connecting bottom plate, the wall-connecting bolts and the connecting rods play the role of connecting the damping wall of the building main body with the energy-dissipating components and ensuring the normal operation of the damper as a whole; wherein each energy-dissipating component comprises a friction plate I, a pre-tightening bolt, a spring, a friction plate II and a limit plate; the energy-dissipating component realizes energy dissipation through the friction force between the friction plate I and the friction plate II, uses the pre-tightening bolt to provide positive pressure between the friction plate I and the friction plate II, and realizes reset through the spring, thereby achieving multiple energy dissipation.

[0007] Furthermore, the friction plate I is a box structure, and is hollow at the front and back, with a triangular upper cross-section and a rectangular lower cross-section; the friction plate II is a steel plate with a rectangular structure, and two parallel friction plates II are respectively arranged on the outside of the friction plate I, and two limit plates are vertically arranged on the inside of each friction plate II. The two friction plates II and the limit plates arranged thereon fix the friction plate I in a rectangular space, and the top of the friction plate I contacts the bottom of the wall top plate; the height and width of the friction plate II are respectively greater than the height and width of the lower rectangular structure of the friction plate I.

[0008] Furthermore, a plurality of symmetrical circular holes are correspondingly provided on the two friction plates II for installing pre-tightening bolts; the two friction plates II can be connected together by the pre-tightening bolts.

[0009] Furthermore, the limit plate is vertically welded to the friction plate II, and the limit plate can limit the friction plate I within a certain space, thereby ensuring that the friction plate I works normally under severe vibration.

[0010] Furthermore, the pre-tightening bolts can pass through the circular holes on the two friction plates II to connect the two friction plates II, thereby providing the pre-tightening force required for the normal working of the friction plates I and II.

[0011] Furthermore, one end of the spring is welded to the bottom of the friction plate I, and the other end is welded to the bottom plate of the connecting wall, so as to ensure that the friction plate I can reciprocate during normal operation.

[0012] Furthermore, the wall connecting bottom plate is provided with strip holes that are compatible with the friction plate I and the bottom of the limit plate, which are used to fix the energy-absorbing components to enable them to work stably; the upper and lower ends of the wall connecting bottom plate are provided with multiple bolt holes, which are used to connect the damping wall of the building body through bolts; the four top corners of the wall connecting bottom plate are provided with semicircular ring structures for connecting connecting rods.

[0013] Furthermore, the wall connecting top plate is provided with bolt holes identical to those on the bottom plate, for connecting the damping wall of the building body; the bottom of the wall connecting top plate is provided with symmetrical sawtooth protrusions, for enabling different numbers of energy dissipation components to work under different vibration magnitudes, thereby achieving the effect of step-by-step energy dissipation. Specifically, the bottom of the top plate is provided with V-shaped grooves and open U-shaped grooves from the midpoint to both sides, and the friction plate I of the energy dissipation component is embedded in the V-shaped grooves and the open U-shaped grooves.

[0014] Furthermore, the connecting rod is connected through the semicircular ring components on the bottom plate and the top plate to ensure the normal operation of the damper as a whole.

[0015] The wall-type stepped friction damper provided by the present invention has the following working mechanism:

[0016] When an earthquake occurs, the top plate of the connecting wall and the energy-absorbing assembly move relative to each other, and the protrusion at the top plate of the connecting wall moves and causes the friction plates I of the two middle energy-absorbing assemblies to move downward. When the relative displacement of the top and bottom plates of the connecting wall increases and the protrusion position exceeds a single energy-absorbing assembly, the top plate no longer provides positive pressure to the friction plates I of the two middle energy-absorbing assemblies. At this time, the elastic force of the spring at the bottom of the energy-absorbing assembly resets the friction plate I. When the protrusion position of the top plate moves to the top of the friction assembly again, the friction plate I can be moved downward again, and so on, to achieve energy consumption. When the relative displacement between the top and bottom plates of the connecting wall is small under the action of a small earthquake, only the friction plates I of the two middle energy-absorbing assemblies play a reciprocating energy-absorbing role; when the relative displacement between the top and bottom plates of the connecting wall increases under the action of a medium or large earthquake, the energy-absorbing assemblies on both sides gradually work; when the displacement is larger, the outermost energy-absorbing assembly begins to participate in energy consumption.

[0017] At this point, when the building structure is subjected to earthquakes of different magnitudes, due to the different positions and intervals of the protrusions on the top plate of the connecting wall, different energy-absorbing components are involved in the work under different earthquake conditions, so that the damping force of the friction damper can be adjusted.

[0018] Beneficial effects of the present invention: The present invention uses several energy-absorbing components to dissipate energy through friction, and provides symmetrical serrated protrusions and multiple energy-absorbing components at the bottom of the wall top plate, so that different numbers of energy-absorbing components work under different earthquake effects, thereby realizing the function of stepped energy dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the damper of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the energy-consuming component;

[0021] Figure 3 for Figure 2 Cross-sectional view of .

[0022] Figure 4 It is a structural schematic diagram of the wall bottom plate;

[0023] Figure 5 for Figure 4 A top view of

[0024] Figure 6 It is a structural schematic diagram of the wall top plate;

[0025] Figure 7 for Figure 6 Bottom view of

[0026] Figure 8 This is a dimension diagram of the symmetrical protrusions of the top plate of the connecting wall;

[0027] Fig. 9 An exploded diagram of a single energy-consuming component;

[0028] Fig.10 This is an exploded diagram of the overall structure of the damper.

[0029] In the figure, 1 is a wall-connected top plate; 2 is a connecting rod for connecting the top and bottom plates; 3 is a wall-connected bottom plate; 4 is a wall-connected bolt; 5 is an energy-absorbing component; 501 is a friction plate I; 502 is a preload bolt; 503 is a spring; 504 is a friction plate II; 505 is a limit plate; 6 is a first energy-absorbing component; 7 is a second energy-absorbing component; 8 is a third energy-absorbing component; 9 is a fourth energy-absorbing component; 10 is a fifth energy-absorbing component; 11 is a sixth energy-absorbing component; 12 is a strip hole; 13 is a V-shaped groove; 14 is an open U-shaped groove. DETAILED DESCRIPTION

[0030] The present invention is further illustrated by the following examples, but is not limited to the following examples. Example

[0031] like Figures 1 to 10As shown, a wall-type stepped friction damper comprises five parts, namely, a wall-connecting top plate 1, a wall-connecting bottom plate 3 and a wall-connecting bolt 4 for connecting the damping wall of the building main body, a connecting rod 2 for connecting the top and bottom plates, and a plurality of energy-dissipating components 5 for dissipating energy; the damper is installed in the damping wall of the building main body; the wall-connecting top plate, the wall-connecting bottom plate, the wall-connecting bolt and the connecting rod play the role of connecting the damping wall of the building main body with the energy-dissipating component and ensuring the normal operation of the damper as a whole; wherein each energy-dissipating component comprises a friction plate I 501, a pre-tightening bolt 502, a spring 503, a friction plate II 504, and a limit plate 505, wherein the energy-dissipating component realizes energy dissipation through the friction force between the friction plate I and the friction plate II, uses the pre-tightening bolt 502 to provide positive pressure between the friction plate I and the friction plate II, and realizes reset through the spring 503, thereby achieving multiple energy dissipation.

[0032] Furthermore, the friction plate I 501 is a box structure, and the front and back are hollow, the upper cross section is a triangle, and the lower cross section is a rectangle; the friction plate II 504 is a steel plate of a rectangular structure, and two parallel friction plates II are respectively arranged on the outside of the friction plate I, and two limit plates 505 are vertically arranged on the inside of each friction plate II. The two friction plates II and the limit plates arranged thereon fix the friction plate I in a rectangular space, and the top of the friction plate I contacts the bottom of the top plate of the connecting wall; the height and width of the friction plate II are respectively greater than the height and width of the lower rectangular structure of the friction plate I. This is the structure of an energy-consuming component.

[0033] Furthermore, the two friction plates II are provided with a plurality of symmetrical circular holes for installing pre-tightening bolts 502; the two friction plates II can be connected by the pre-tightening bolts. The pre-tightening bolts 502 can pass through the circular holes on the two friction plates II to connect the two friction plates II, providing the pre-tightening force required for the normal operation of the friction plates I and II.

[0034] Furthermore, the limit plate 505 is vertically welded to the friction plate II. The limit plate can limit the friction plate I within a certain space, and can ensure that the friction plate I works normally under severe vibration.

[0035] Furthermore, one end of the spring 503 is welded to the bottom of the friction plate I, and the other end is welded to the bottom plate of the connecting wall, so as to ensure that the friction plate I can reciprocate during normal operation.

[0036] Furthermore, the wall connecting bottom plate is provided with strip holes 12 which are compatible with the friction plate I and the bottom of the limit plate, and are used to fix the energy-absorbing component so that it can work stably; the upper and lower ends of the wall connecting bottom plate are provided with multiple bolt holes, which are used to connect the damping wall of the building body by bolts; the four top corners of the wall connecting bottom plate are provided with semicircular ring structures, which are used to connect the connecting rods.

[0037] Furthermore, the wall connecting top plate is provided with bolt holes identical to those on the bottom plate, for connecting the damping wall of the building body; the bottom of the wall connecting top plate is provided with symmetrical sawtooth protrusions, for enabling different numbers of energy dissipation components to work under different vibration magnitudes, thereby achieving the effect of step-by-step energy dissipation. Specifically, the bottom of the top plate is provided with V-shaped grooves 13 and open U-shaped grooves 14 from the midpoint to both sides, and the friction plate I of the energy dissipation component is embedded in the V-shaped grooves and the open U-shaped grooves.

[0038] Furthermore, the connecting rod is connected through the semicircular ring components on the bottom plate and the top plate to ensure the normal operation of the damper as a whole.

[0039] The wall-type stepped friction damper provided by the present invention has the following working mechanism:

[0040] When an earthquake occurs, the top plate 1 of the connecting wall and the energy absorbing component 5 are relatively displaced, the bulge at the top plate of the connecting wall moves and causes the friction plates Ⅰ501 of the two middle energy absorbing components to move downward. When the relative displacement of the top and bottom plates of the connecting wall increases and the bulge position exceeds a single energy absorbing component, the top plate no longer contacts the two middle energy absorbing components (i.e. Figure 8 The friction plate I of the third energy absorbing assembly 8 and the fourth energy absorbing assembly 9 (marked in the middle) provides positive pressure. At this time, the elastic force of the spring at the bottom of the energy absorbing assembly resets the friction plate I and enters the adjacent notch. When the friction plate I moves to the bottom of the adjacent notch and gradually resets to the preset height, the friction plate I can be moved downward again, and so on, to achieve energy consumption. When the relative displacement between the top and bottom plates of the connecting wall is small under the action of a small earthquake, only the friction plates I of the two energy absorbing assemblies in the middle (the third energy absorbing assembly 8 and the fourth energy absorbing assembly 9) play a reciprocating energy absorbing role; under the action of a medium earthquake or a large earthquake, the relative displacement between the top and bottom plates of the connecting wall increases, gradually making the energy absorbing assemblies on both sides (the second energy absorbing assembly 7 and the fifth energy absorbing assembly 10) work; when the displacement is larger, the outermost energy absorbing assemblies (the first energy absorbing assembly 6 and the sixth energy absorbing assembly 11) begin to participate in energy consumption.

[0041] At this point, when the building structure is subjected to earthquakes of different magnitudes, due to the different positions and intervals of the protrusions on the top plate of the connecting wall, multiple energy-absorbing components can work under the action of a large earthquake, while under the action of a small earthquake, the number of energy-absorbing components is reduced, and the damper can work earlier.

[0042] The wall damper is installed in the middle of the building damping wall. Before installation, the magnitude of each level of friction should be adjusted in advance by adjusting the pre-tightening bolts and springs in each energy-absorbing component, and corresponding to the protrusions on the top plate, so that different numbers of energy-absorbing components can work under different vibration sizes to achieve the effect of stepped energy absorption.

Claims

1. A wall-type stepped friction damper, characterized in that: It includes a wall connecting top plate, a wall connecting bottom plate, a wall connecting bolt, a connecting rod for connecting the top and bottom plates, and a plurality of energy absorbing components for absorbing energy; the damper is installed in the damping wall of the building; the wall connecting top plate, the wall connecting bottom plate, the wall connecting bolt and the connecting rod play the role of connecting the damping wall of the building and the energy absorbing component and ensuring the normal operation of the damper as a whole; each energy absorbing component includes a friction plate I, a pre-tightening bolt, a spring, a friction plate II, and a limit plate; the energy absorbing component realizes energy absorption through the friction between the friction plate I and the friction plate II, uses the pre-tightening bolt to provide positive pressure between the friction plate I and the friction plate II, and realizes reset through the spring, so as to achieve multiple energy absorption; The friction plate I is a box structure with hollow front and back, a triangular upper cross section and a rectangular lower cross section; the friction plate II is a steel plate with a rectangular structure, two parallel friction plates II are respectively arranged on the outside of the friction plate I, two limit plates are vertically arranged on the inside of each friction plate II, the two friction plates II and the limit plates arranged thereon fix the friction plate I in a rectangular space, the top of the friction plate I contacts the bottom of the top plate of the connecting wall; the height and width of the friction plate II are respectively greater than the height and width of the rectangular structure below the friction plate I; The wall connecting top plate is provided with bolt holes identical to those of the bottom plate, which are used to connect the damping wall of the building body; the bottom of the wall connecting top plate is provided with symmetrical serrated protrusions, which are used to enable different numbers of energy-absorbing components to work under different vibration magnitudes, thereby achieving the effect of stepped energy absorption; the bottom of the top plate is provided with V-shaped grooves and open U-shaped grooves on both sides starting from the midpoint, and the friction plate I of the energy-absorbing component is embedded in the V-shaped grooves and the open U-shaped grooves.

2. The wall-type stepped friction damper according to claim 1, characterized in that: A number of symmetrical circular holes are correspondingly arranged on the two friction plates II. The pre-tightening bolts pass through the circular holes on the two friction plates II to connect the two friction plates II, thereby providing the pre-tightening force required for the normal working of the friction plates I and II.

3. The wall-type stepped friction damper according to claim 1, characterized in that: The limit plate is vertically welded on the friction plate II. The limit plate can limit the friction plate I within a certain space, and can ensure that the friction plate I works normally under severe vibration.

4. The wall-type stepped friction damper according to claim 1, characterized in that: One end of the spring is welded to the bottom of the friction plate I, and the other end is welded to the bottom plate of the connecting wall, so as to ensure that the friction plate I can reciprocate in normal working state.

5. The wall-type stepped friction damper according to claim 1, characterized in that: The wall connecting bottom plate is provided with strip holes that are compatible with the friction plate I and the bottom of the limit plate, which are used to fix the energy-absorbing components to enable them to work stably; the upper and lower ends of the wall connecting bottom plate are provided with multiple bolt holes, which are used to connect the damping wall of the building body through bolts; the four top corners of the wall connecting bottom plate are provided with semicircular ring structures for connecting connecting rods.

6. The wall-type stepped friction damper according to claim 1, characterized in that: The connecting rod is connected through the semicircular ring components on the bottom plate and the top plate to ensure the normal operation of the damper as a whole.

7. An application of the wall-type stepped friction damper according to any one of claims 1 to 6, characterized in that: When an earthquake occurs, the top plate of the connecting wall and the energy absorbing assembly are relatively displaced, and the protrusion at the top plate of the connecting wall moves and causes the friction plates I of the two middle energy absorbing assemblies to move downward. When the relative displacement of the top and bottom plates of the connecting wall increases and the protrusion position exceeds a single energy absorbing assembly, the top plate no longer provides positive pressure to the friction plates I of the two middle energy absorbing assemblies. At this time, the elastic force of the spring at the bottom of the energy absorbing assembly resets the friction plate I. When the protrusion position of the top plate moves to the top of the friction assembly again, the friction plate I can be moved downward again, and so on and so forth to achieve energy dissipation. When the relative displacement between the top and bottom plates of the connecting wall is small under the action of a small earthquake, only the friction plate I of the two energy-absorbing components in the middle plays a reciprocating energy-absorbing role; when the relative displacement between the top and bottom plates of the connecting wall increases under the action of a medium or large earthquake, the energy-absorbing components on both sides gradually take effect; when the displacement is larger, the outermost energy-absorbing components begin to participate in energy absorption.

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