Displacement amplification type friction energy dissipation self-resetting damper and building main body

Abstract

The utility model discloses a displacement amplification type friction energy dissipation self-resetting damper and building main body, displacement amplification type friction energy dissipation self-resetting damper includes T type connecting plate, movable connecting plate, apron, rotating plate and friction plate, the rotating plate press -fit is between two aprons, and the center of rotating plate is connected with apron, and the friction plate is located between apron and rotating plate, and is embedded in the recess of apron side wall, T type connecting plate is fixedly connected with one end of apron, and rotating plate is connected with the lug plate of movable connecting plate through bolt, the contact surface of friction plate and rotating plate forms wedge friction structure, when both sides connecting plate generates vertical relative displacement, rotating plate generates relative rotation to friction plate, and wedge friction structure can produce reset force on the contact surface, realizes energy dissipation and shock absorption with reset ability, and with the increase of deformation, the friction and reset force on wedge surface also increase, enhance energy dissipation capacity, improve the seismic toughness of building.

Description

Technical Field

[0001] This utility model relates to the field of seismic resistance of engineering structures, specifically a displacement-amplified friction energy-dissipating self-resetting damper and a building body. Background Technology

[0002] As a key component in a structure for absorbing vibrational energy, dampers, when properly arranged within a building structure, can be the first to activate when the structure is subjected to earthquakes or wind loads. This effectively absorbs the vibrational energy input into the structure, thereby reducing the vibrational response and ensuring the safety of the building. With rapid societal development, people have placed higher demands on their living and production environments, leading to the continuous research and development and widespread application of various dampers in practical engineering. While traditional dampers can effectively reduce vibration and dissipate energy, they often exhibit significant residual deformation, such as metal dampers, buckling-restrained braces (BRBs), and friction dampers. This residual deformation significantly increases the difficulty of replacing dampers after an earthquake, and may even render them irreplaceable, affecting the normal functionality of the building. Therefore, there is an urgent need to develop a new type of damper suitable for prefabricated shear walls. This damper should possess displacement amplification and self-resetting functions to enhance its recoverability and application value in post-earthquake structures. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a displacement-amplified friction energy dissipation self-resetting damper and a building body. It combines the displacement-amplified friction energy dissipation mechanism with the wedge-shaped self-resetting mechanism in parallel, which has the advantages of high energy dissipation efficiency, small residual deformation and easy replacement. This design not only realizes the effective energy dissipation and vibration reduction of the structure, but also has the function of quick replacement, which helps the building to quickly return to normal use after an earthquake, thereby significantly improving the seismic toughness and recoverability of the building.

[0004] This utility model is achieved through the following technical solution:

[0005] A displacement-amplified friction energy-dissipating self-resetting damper includes a T-shaped connecting plate, a double-ear connecting plate, a cover plate, a rotating plate, and friction plates.

[0006] The rotating plate is press-fitted between the two cover plates, with the center of the rotating plate rotating with the cover plate. The friction plate is located between the cover plate and the rotating plate and is fixed on the side wall of the cover plate.

[0007] One side of the T-shaped connecting plate is used to connect to the main structure of the building, and the other side of the T-shaped connecting plate is fixedly connected to one end of the cover plate. The rotating plate is connected to one side of the double-ear connecting plate through the connecting arm, and the other side of the double-ear connecting plate is used to connect to the main structure of the building.

[0008] The contact surfaces of the friction plate and the rotating plate form a wedge-shaped friction structure. When the fixed connecting plate and the double-ear connecting plate produce vertical relative displacement, the rotating plate and the friction plate rotate relative to each other. The wedge-shaped friction structure can increase the friction and restoring force between the friction plate and the rotating plate, thereby realizing variable friction energy consumption.

[0009] Preferably, the wedge-shaped friction structure includes a concave inclined surface and a convex inclined surface that cooperates with it;

[0010] The concave inclined surface is disposed on the end face of the friction plate, and the corresponding convex inclined surface is disposed on the end face of the rotating plate.

[0011] Preferably, the concave inclined surface is a V-shaped structure, and the convex inclined surface is a convex V-shaped structure.

[0012] Preferably, a plurality of wedge-shaped friction structures are provided between the rotating plate and the friction plate, and the plurality of wedge-shaped friction structures are evenly distributed along the circumference of the rotating axis.

[0013] Preferably, the friction pads have a fan-shaped structure and are embedded in the groove on the end face of the cover plate, with multiple friction pads evenly distributed around the circumference.

[0014] Preferably, the rotating plate includes a rotating shaft and a plurality of rotating plates disposed thereon, the number and position of which correspond to the friction plates.

[0015] Preferably, a limiting structure is provided on the rotating plate to limit the rotation angle of the rotating plate, thereby limiting the ultimate working stroke of the damper.

[0016] Preferably, the limiting structure includes an SMA preload bolt and a slide groove, which is disposed on the rotating plate and arranged along the rotation direction of the rotating plate, and the SMA preload bolt passes through the slide groove to connect the cover plate.

[0017] Preferably, the rotating plate has a connecting arm at its center that extends toward the double-ear connecting plate. The connecting arm is connected to one end of the double-ear connecting plate, and the other end of the double-ear connecting plate is used to connect to the main structure.

[0018] A building structure includes the aforementioned displacement-amplified friction energy dissipation self-resetting damper, wherein the shear wall of the building structure is connected to the displacement-amplified friction energy dissipation self-resetting damper.

[0019] Compared with the prior art, the present invention has the following beneficial technical effects:

[0020] This application provides a displacement-amplified friction energy dissipation self-resetting damper, which presses a friction plate and a rotating plate between cover plates, and sets a wedge-shaped friction structure between the friction plate and the rotating plate. Utilizing the lever principle, it can amplify the small deformations in the vertical joints of the shear wall, improve energy dissipation efficiency, exert a stronger energy dissipation effect during earthquakes, and suppress structural deformation. This damper combines the displacement-amplified friction energy dissipation mechanism with the wedge-shaped reset mechanism in parallel, forming an advantage with high energy dissipation efficiency, small residual deformation, and easy replacement. This damper has functions such as variable friction energy dissipation, self-resetting function, and rapid replacement after earthquakes, enabling the rapid restoration of the normal use function of the building structure. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a front view of a displacement-amplified friction energy-dissipating self-resetting damper according to the present invention.

[0023] Figure 2 This is a top view of a displacement-amplified friction energy-dissipating self-resetting damper according to the present invention.

[0024] Figure 3 This is a three-dimensional exploded view of a displacement-amplified friction energy-dissipating self-resetting damper according to the present invention.

[0025] Figure 4 This is a structural diagram of the T-shaped connecting plate of a displacement-amplified friction energy-dissipating self-resetting damper according to the present invention.

[0026] Figure 5 This is a structural diagram of the connecting plate of a displacement-amplified friction energy-dissipating self-resetting damper according to the present invention.

[0027] Figure 6 This is a structural diagram of a displacement-amplified friction energy-dissipating self-resetting damper cover plate according to the present invention.

[0028] Figure 7 This is a structural diagram of the friction plate of a displacement-amplified friction energy-dissipating self-resetting damper according to the present invention.

[0029] Figure 8 This is a structural diagram of the rotating plate of a displacement-amplified friction energy-dissipating self-resetting damper according to the present invention.

[0030] In the diagram: 1. T-shaped connecting plate; 2. Cover plate; 3. Double-ear connecting plate; 4. Cover plate connecting bolt; 5. SMA preload bolt; 6. Rotating plate connecting bolt; 7. Ear plate connecting bolt; 8. Rotating plate; 9. Friction plate; 10. End plate; 11. End plate hole; 12. Vertical plate; 13. Vertical plate hole; 14. Connecting plate end plate; 15. Connecting plate end plate hole; 16. Ear plate; 17. Cover plate step; 18. Cover plate root; 19. Cover plate root hole; 20. Groove; 21. Groove hole; 22. Cover plate center hole; 23. Friction plate plane; 24. Friction plate V-shaped bevel; 25. Friction plate hole; 26. Fan-shaped plate; 27. Fan-shaped plate V-shaped bevel; 28. Arc-shaped elongated hole; 29. ​​Rotating plate center hole; 30. Connecting arm; 31. Rotating plate side hole; 32. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0033] A displacement-amplified friction energy-dissipating self-resetting damper includes a T-shaped connecting plate 1, a double-ear connecting plate 3, a cover plate 2, a rotating plate 8, and a friction plate 9.

[0034] The rotating plate 8 is pressed between the two cover plates 2. The center hole of the rotating plate 8 is connected to the cover plate. The friction plate 9 is located between the cover plate 2 and the rotating plate 8 and is embedded in the groove of the side wall of the cover plate 8.

[0035] The T-shaped connecting plate 1 is fixedly connected to one end of the cover plate 2, and one end of the movable connecting plate 3 is connected to the rotating plate 8 through the connecting arm 31. The other end of the movable connecting plate 3 is connected to the main structure.

[0036] The contact surfaces of the friction plate 9 and the rotating plate 8 form a wedge-shaped friction structure. When the double-ear connecting plate 3 and the T-shaped connecting plate 1 undergo vertical relative displacement, the rotating plate 8 and the friction plate 9 rotate relative to each other. The wedge-shaped friction structure can increase the friction and restoring force on the rotating plate 8 and the friction plate 9.

[0037] In some embodiments, the wedge-shaped friction structure includes a concave inclined surface and a convex inclined surface that cooperates therewith.

[0038] The concave inclined surface is set on the end face of the friction plate 9, and the corresponding convex inclined surface is set on the end face of the rotating plate 8. When the double-ear connecting plate 3 and the T-shaped connecting plate 1 undergo vertical relative displacement, the rotating plate 8 is driven to rotate through the connecting arm. During the rotation of the rotating plate 8, when the end with the larger thickness of the convex inclined surface rotates relative to the friction plate 9, it squeezes the rotating plate 8 and the friction plate 9, increasing the friction between the contact surfaces, further enhancing the energy dissipation capacity, and simultaneously increasing the reset force. After the earthquake, the rotating plate 8 is driven to return to its initial state.

[0039] Optionally, the concave inclined surface is a V-shaped structure, and the corresponding convex inclined surface is a convex V-shaped structure.

[0040] Optionally, multiple wedge-shaped friction structures are provided between the rotating plate 8 and the cover plate 2. These wedge-shaped friction structures are evenly distributed along the circumference of the rotation axis, so that the end faces of the rotating plate 8 and the friction plate 9 form a continuous V-shaped groove structure in the circumferential direction. In some embodiments, the friction plate 9 has a fan-shaped structure, and a groove 21 is provided on the inner side of the cover plate 2. The friction plate 9 is embedded in the groove 21 on the inner wall of the cover plate 2, and one friction plate 9 is symmetrically arranged vertically along the center of the rotating plate 8 on each cover plate 2.

[0041] The rotating plate includes a rotating shaft and multiple rotating plates disposed thereon, the number and position of which correspond to the friction disc.

[0042] In some embodiments, a limit structure is provided on the rotating plate to limit the rotation angle of the rotating plate, thereby limiting the ultimate deformation of the damper.

[0043] The limiting structure includes an SMA preload bolt 5 and an arc-shaped elongated hole 29. The arc-shaped elongated hole 29 is located on the rotating plate 27. The SMA preload bolt passes through the cover plate 2, the rotating plate 27, and the arc-shaped elongated hole 29, pressing the rotating plate 8 between the two cover plates 2. When the rotating plate 8 rotates to its limit position, the SMA preload bolt 5 abuts against the end of the arc-shaped elongated hole 29, limiting the continued rotation of the rotating plate 8.

[0044] In some embodiments, a connecting arm 31 is provided on the right side of the rotating plate 8, the connecting arm 31 is connected to the ear plate 16 of the double ear connecting plate 3, and the other end of the double ear connecting plate 3 is connected to the main structure.

[0045] A vertical plate 12 is formed on the T-shaped connecting plate 1. The vertical plate 12 is located between the two cover plates 2 and is fixedly connected to the cover plates 2, thereby fixing the T-shaped connecting plate to the cover plates 2. The other side of the T-shaped connecting plate 1 is used to connect the main structure.

[0046] Example 1

[0047] like Figures 1 to 8As shown, a displacement-amplified friction energy-dissipating self-resetting damper includes a T-shaped connecting plate 1, a cover plate 2, a double-ear connecting plate 3, a rotating plate 8, and a friction plate 9.

[0048] T-shaped connecting plate 1 and double-ear connecting plate 3 are transitional parts between the self-resetting damper and the main structure. One side of T-shaped connecting plate 1 is connected to cover plate 2, and the other side is connected to the main structure. One side of double-ear connecting plate 3 is connected to rotating plate 8, and the other side is connected to the main structure.

[0049] See Figure 4 The T-shaped connecting plate 1 includes an end plate 10 and a vertical plate 12. The vertical plate 12 is located in the middle of the end plate 10 and is perpendicular to the end plate 10. The end plate 10 is provided with a plurality of end plate holes 11, and the vertical plate 12 is provided with a plurality of vertical plate holes 13. Bolts pass through the end plate holes 11 to connect the end plate 10 to the main structure. The vertical plate 12 is located between two cover plates 2 and is connected by cover plate connecting bolts 4.

[0050] See Figure 5 The double-ear connecting plate 3 includes a connecting plate end plate 14, a connecting plate end plate hole 15, an ear plate 16, and an ear plate hole 17. The ear plate 16 is located at the center of the connecting plate end plate 14, and the two ear plates 16 are spaced apart. The ear plate hole 17 is located on the ear plate 16, and the connecting plate end plate hole 15 is located on the connecting plate end plate 14. The connecting plate end plate 14 is connected to the main structure through the connecting plate end plate hole 15 and bolts. The ear plate 16 is connected to the rotating plate 8 through the ear plate hole 17 and ear plate connecting bolts 7.

[0051] See Figure 6 The cover plate 2 has a step 18 at one end near the T-shaped connecting plate 1. The step 18 has multiple cover plate root holes 20 for connecting the upright plate 12 through the cover plate connecting bolts 4. The inner side wall of the cover plate 2 has two grooves 21, the shape of which corresponds to the friction plate 9 and is used to fix the friction plate 9. The grooves 21 have groove holes 22. The cover plate 2 has a cover plate center hole 23 in the middle, which corresponds to the center hole 30 of the rotating plate and is used to connect the rotating plate 8.

[0052] See Figure 7 The friction plate 9 has the same shape as the groove 21. One side of the friction plate 9 is the friction plate plane 24, which contacts the groove 21 in the connecting plate 2. The other side is the friction plate V-shaped inclined surface 25, which is concave. The friction plate 9 has a friction plate hole 26 in the middle, which corresponds to the groove hole 21.

[0053] See Figure 8The rotating plate 8 includes two sector plates 27. One side of each sector plate 27 has a V-shaped inclined surface 28, which is convex and corresponds to the V-shaped inclined surface 25 of the friction plate. The sector plate 27 has an arc-shaped elongated hole 29 for passing through the SMA bolt 5 to apply preload, preventing the SMA bolt 5 from colliding with the sector plate during rotation and limiting the ultimate deformation of the rotating plate. The SMA bolt 5 has a large elastic deformation capacity, capable of adapting to the deformation caused by the rotation of the wedge-shaped friction structure. A central hole 30 is provided in the middle of the rotating plate 8, and side holes 32 are provided on the connecting arm 31. The central hole 30 of the rotating plate and the central hole 23 of the cover plate are connected by a rotating plate connecting bolt 6.

[0054] The installation process of a displacement-amplified friction energy-dissipating self-resetting damper according to this application is as follows:

[0055] The T-shaped connecting plate 1 and the double-ear connecting plate 3 are first connected to the shear walls at both ends, then the four friction plates 9 are respectively installed in the grooves 21 of the two cover plates 2, and then the cover plate root hole 20 of one cover plate 2 is first connected to the vertical plate hole 13 with the cover plate connecting bolt 4.

[0056] Align the center hole 30 of the rotating plate with the center hole 23 of the cover plate, insert the rotating plate connecting bolt 6, and tighten the nut on the bolt 6; no need to tighten it. Then align the side hole 32 of the rotating plate with the ear plate hole 11, insert the ear plate connecting bolt 7, and tighten the nut on the bolt 7; no need to tighten it.

[0057] Align the hole 20 at the base of the cover plate 2 containing the friction plate 9 with the hole 13 in the upright plate, then screw on the nut. The nut of the bolt 4 only needs to be tightened, not fully tightened. Insert the SMA preload bolt 5 into the two recessed holes 22, and finally use a torque wrench to tighten the SMA bolt 5 to the designed preload.

[0058] The working principle of this displacement-amplified friction energy-dissipating self-resetting damper is as follows:

[0059] When the two side wall structures experience vertical relative displacement, this is reflected in the damper as vertical displacement of the central hole 30 and the side hole 31 of the rotating plate, causing the rotating plate 8 to rotate. Due to the lever principle, the two sector plates 27 in the rotating plate 8 experience significant displacement. The rotating plate 8 and the friction plate 9 are designed as V-shaped inclined surfaces. Under the preload, forces perpendicular to the inclined surfaces and forces along the inclined surfaces are generated. The force perpendicular to the inclined surfaces is converted into frictional force to dissipate energy, while the force along the inclined surfaces provides the damper with a restoring force. As the displacement of the sector plate 27 increases, the inclined surfaces further compress the friction plate 9, increasing the force between the contact surfaces, thus increasing friction, further enhancing the energy dissipation capacity, and increasing the restoring force. After the earthquake, the restoring force drives the rotating plate 8 to return to its initial state. Simultaneously, considering the horizontal displacement changes caused by the rotation of the central hole 30 and the side hole 31 of the rotating plate, the side hole 31 of the rotating plate is designed as an elongated hole to accommodate changes in horizontal displacement during rotation. The arc-shaped elongated hole 29 set in the rotating plate 8 can effectively limit the ultimate deformation of the damper and prevent the collapse caused by large structural deformation. The damper has functions such as variable friction energy dissipation, self-resetting function and quick replacement after earthquake, which can realize the rapid restoration of the normal use function of the building structure.

[0060] The significant characteristic of this self-resetting damper is that it produces almost no residual deformation or only a small residual deformation after the load is applied, thus greatly reducing the difficulty of damper replacement and ensuring that the building function can be quickly restored after the structure is subjected to external loads. With the increasing number of prefabricated housing projects, dampers can serve as connectors for the vertical joints of prefabricated walls, enabling rapid assembly on the construction site. Simultaneously, dampers play a good role in energy dissipation and vibration reduction in such buildings. For displacement-type dampers, their energy dissipation efficiency is highly dependent on the displacement amplitude. However, in actual engineering, the displacement generated by external loads on the structure is usually small. By introducing a displacement amplification mechanism, structural deformation can be effectively amplified, allowing the damper to be activated earlier, thereby significantly improving the damper's energy dissipation capacity and facilitating replacement and rapid restoration of building function.

[0061] The above content is only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed in this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A displacement-amplified friction energy-dissipating self-resetting damper, characterized in that, Includes a T-shaped connecting plate, a double-ear connecting plate, a cover plate, a rotating plate, and a friction plate; The rotating plate is press-fitted between the two cover plates, with the center of the rotating plate rotating with the cover plate. The friction plate is located between the cover plate and the rotating plate and is fixed on the side wall of the cover plate. One side of the T-shaped connecting plate is used to connect to the main structure of the building, and the other side of the T-shaped connecting plate is fixedly connected to one end of the cover plate. The rotating plate is connected to one side of the double-ear connecting plate through the connecting arm, and the other side of the double-ear connecting plate is used to connect to the main structure of the building. The contact surfaces of the friction plate and the rotating plate form a wedge-shaped friction structure. When the fixed connecting plate and the double-ear connecting plate produce vertical relative displacement, the rotating plate and the friction plate rotate relative to each other. The wedge-shaped friction structure can increase the friction and restoring force between the friction plate and the rotating plate, thereby realizing variable friction energy consumption.

2. The displacement-amplified friction energy-dissipating self-resetting damper according to claim 1, characterized in that, The wedge-shaped friction structure includes a concave inclined surface and a convex inclined surface that cooperates with it; The concave inclined surface is disposed on the end face of the friction plate, and the corresponding convex inclined surface is disposed on the end face of the rotating plate.

3. The displacement-amplified friction energy-dissipating self-resetting damper according to claim 2, characterized in that, The concave inclined surface has a V-shaped structure, and the convex inclined surface has a convex V-shaped structure.

4. The displacement-amplified friction energy-dissipating self-resetting damper according to claim 1, characterized in that, Multiple wedge-shaped friction structures are provided between the rotating plate and the friction plate, and the multiple wedge-shaped friction structures are evenly distributed along the circumference of the rotating axis.

5. A displacement-amplified friction energy-dissipating self-resetting damper according to claim 1, characterized in that, The friction pads are fan-shaped and are embedded in the groove on the end face of the cover plate, with multiple friction pads evenly distributed around the circumference.

6. A displacement-amplified friction energy-dissipating self-resetting damper according to claim 1 or 5, characterized in that, The rotating plate includes a rotating shaft and multiple rotating plates disposed thereon, the number and position of which correspond to the friction plates.

7. A displacement-amplified friction energy-dissipating self-resetting damper according to claim 1, characterized in that, A limiting structure is provided on the rotating plate to limit the rotation angle of the rotating plate, thereby limiting the ultimate working stroke of the damper.

8. A displacement-amplified friction energy-dissipating self-resetting damper according to claim 7, characterized in that, The limiting structure includes an SMA preload bolt and a slide groove. The slide groove is set on the rotating plate and is arranged along the rotation direction of the rotating plate. The SMA preload bolt passes through the slide groove and connects to the cover plate.

9. A displacement-amplified friction energy-dissipating self-resetting damper according to claim 1, characterized in that, The rotating plate has a connecting arm at its center that extends toward the double-ear connecting plate. The connecting arm is connected to one end of the double-ear connecting plate, and the other end of the double-ear connecting plate is used to connect to the main structure.

10. A building structure, characterized in that, Includes the displacement-amplified friction energy dissipation self-resetting damper as described in any one of claims 1-9, wherein the shear wall of the main building is connected to the displacement-amplified friction energy dissipation self-resetting damper.

Images