Variable friction energy dissipation self-centering rotational node

Abstract

The present application relates to a kind of variable friction energy dissipation self-resetting rotary nodes, comprising: bracket;Rotary frame is rotatably connected with the bracket by rotating shaft, gear is also coaxially connected with it on the rotating shaft;Two covers are respectively located above and below the rotating shaft, rack is also provided on cover and engaged with the gear;Self-resetting device, its two ends are connected with the bracket and cover respectively;And variable friction energy dissipation device, two opposite misplacement ends are connected with two covers respectively.The present application can solve the problems that existing self-resetting nodes cannot meet the different needs of structure under different levels of seismic action for energy dissipation capacity and stiffness, or cannot realize adjustable reset force, or due to the small rotating angle of node, there is insufficient energy dissipation capacity and reset capacity.

Description

Technical Field

[0001] This invention belongs to the field of building structure protection technology and relates to a variable friction energy dissipation self-resetting rotating node. Background Technology

[0002] Traditional seismic design based on ductility primarily dissipates seismic energy through the plastic deformation of structural members to prevent structural collapse. This inevitably leads to significant residual deformation after an earthquake. Repairing structures with substantial residual deformation is difficult and costly; some buildings are even beyond repair and must be demolished and rebuilt, resulting in significant resource waste. Self-resetting structures effectively overcome these drawbacks, exhibiting minimal residual deformation after an earthquake. Existing self-resetting nodes typically employ constant stiffness and frictional energy dissipation, but the energy dissipation capacity and stiffness requirements vary under different seismic loads. Furthermore, existing self-resetting nodes cannot achieve adjustable restoring force, and their small rotation angle results in insufficient energy dissipation and restoring capacity. Summary of the Invention

[0003] The purpose of this invention is to provide a variable friction energy dissipation self-resetting rotating node to solve at least one of the following problems: existing self-resetting nodes cannot meet the different energy dissipation capacity and stiffness requirements of structures under different levels of seismic action, or cannot achieve adjustable reset force, or have insufficient energy dissipation capacity and reset capacity due to small node rotation angle. It has good energy dissipation capacity and reset capacity, and can reduce the seismic response and post-earthquake residual deformation of the structure.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A variable friction energy dissipation self-resetting rotary node includes:

[0006] bracket;

[0007] A rotating frame rotatably connected to the bracket via a rotating shaft, and a gear coaxially connected to the rotating shaft;

[0008] Two cover plates are located above and below the rotating shaft, respectively, and a rack that meshes with the gear is also provided on the cover plates;

[0009] The self-resetting device has its two ends connected to the bracket and the cover plate, respectively.

[0010] And a variable friction energy dissipation device, whose two relatively misaligned moving ends are respectively connected to two cover plates.

[0011] Furthermore, the bracket includes a first back plate and two bracket hooks arranged vertically on the first back plate and parallel to each other, and the bracket hooks are machined with hook grooves for placing the rotating shaft.

[0012] Furthermore, the rotating frame includes a second back plate, an ear plate vertically mounted on the second back plate, and a rotating shaft mounted on the ear plate, with a gear mounted at each end of the rotating shaft.

[0013] Furthermore, the cover plate includes a base plate and a connecting side plate vertically mounted on the base plate for connection with the self-resetting device, and a rack that meshes with the gear is also machined on the surface of the base plate.

[0014] Furthermore, the self-resetting device includes a first connector, a second connector, a connecting rod, a first pressure plate, a second pressure plate, a self-resetting spring, and a core rod. At least one connecting rod is fixedly installed on the first connector. The first pressure plate and the second pressure plate are slidably installed on the connecting rod. One end of the core rod is fixed to the second connector, and the other end passes through the second pressure plate and the first pressure plate in sequence. The self-resetting spring, with its two ends respectively abutting against the first pressure plate and the second pressure plate and in a compressed state, is also sleeved on the core rod. Limiting nuts for limiting the stroke of the first pressure plate and the second pressure plate or the distance between them are also provided on both sides of the connecting rod. A first tie nut and a second tie nut for abutting against the first pressure plate and the second pressure plate are also provided on the core rod.

[0015] Furthermore, the position of the limiting nut on the connecting rod is adjustable, and the position of the tie nut on the core rod is also adjustable, so as to make the maximum distance between the first pressure plate and the second pressure plate adjustable.

[0016] Furthermore, the variable friction energy dissipation device includes a first side plate, a middle plate, a second side plate, and one or more connecting screws. The head of the connecting screw abuts against the second side plate, and the tail passes through the second side plate, the middle plate, and the first side plate in sequence before being fixed with a nut. A disc spring string is also fitted on the connecting screw between the fixed nut and the first side plate. The surface of the first side plate facing the middle plate is machined with a groove, and the surface of the middle plate is machined with a protrusion corresponding to the groove. The middle plate is also provided with a transverse groove for the connecting screw to pass through and move horizontally. The middle plate and the first side plate serve as two relatively offset moving ends, and each is selectively connected to one of the two cover plates.

[0017] Furthermore, the second side plate is also provided with a friction pad that contacts the middle plate.

[0018] Furthermore, both the groove and the protrusion have isosceles trapezoidal cross sections, and the upper base angles of the two isosceles trapezoids are equal. The length of the base of the protrusion is less than the length of the base of the groove.

[0019] Furthermore, a top plate is fixedly installed on the top of the middle plate, and a seat plate is fixedly installed on the bottom of the second side plate. Bolt holes are respectively opened on the top plate and the seat plate to connect the two cover plates.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] (1) Variable friction energy dissipation and stiffness. Traditional self-resetting devices all use constant friction energy dissipation, while this invention uses variable friction energy dissipation. Under moderate earthquakes, the node rotation is small, and the friction force of the variable friction energy dissipation device is constant. Under strong earthquakes, the node rotation is large, the friction force of the variable friction energy dissipation device increases, and the node's energy dissipation capacity and stiffness are enhanced.

[0022] (2) The preload of the spring is adjustable. Traditional self-resetting devices use a cylindrical connection, which cannot directly adjust the preload. This invention uses a rod connection, which allows the distance between the left and right limit plates to be changed by adjusting the left and right limit nuts, as well as the left and right tie nuts, thereby making it very convenient to adjust the preload of the disc spring.

[0023] (3) Displacement amplification function. Due to the small rotation angle of the node, traditional self-resetting nodes have insufficient energy consumption and reset capabilities due to their small displacement stroke. This invention amplifies the node rotation displacement by setting a large gear, thereby increasing the stroke of the self-resetting device and improving its reset and energy consumption capabilities. The gear size can be set as needed to obtain the ideal rotation displacement.

[0024] (4) Excellent reset capability. Regardless of whether the node rotates clockwise or counterclockwise, the disc spring can always be in a further compressed state, which can always provide good reset capability, thereby reducing the residual displacement of the structure.

[0025] (5) When the structure is equipped with the nodes proposed in this invention, during an earthquake, regardless of whether the nodes rotate clockwise or counterclockwise, the disc springs will always be further compressed. After the earthquake, when residual deformation is about to occur in the structure, the compressed disc springs will provide a rebound force, pushing the structure back to its initial equilibrium position, thereby reducing residual deformation and achieving self-resetting. Simultaneously, during node rotation, the variable friction energy dissipation device can dissipate seismic energy, thereby reducing the peak dynamic response of the structure. Under moderate earthquakes, node rotation is small, and the friction force of the energy dissipation device remains constant. Under strong earthquakes, node rotation is large, the friction force of the energy dissipation device increases, and the energy dissipation capacity and stiffness of the node increase. Attached Figure Description

[0026] Figure 1 A schematic diagram of a variable friction energy dissipation self-resetting rotary self-resetting node;

[0027] Figure 2This is an assembly diagram of a variable friction energy dissipation self-resetting rotary self-resetting node.

[0028] Figure 3 A schematic diagram of the main structure of a variable friction energy dissipation self-resetting rotating self-resetting node;

[0029] Figure 4 This is a structural diagram of the bracket;

[0030] Figure 5 This is a schematic diagram of the rotating frame.

[0031] Figure 6 This is a schematic diagram of the self-resetting device.

[0032] Figure 7 This is a schematic diagram of the self-resetting device in different states;

[0033] Figure 8 This is a schematic diagram of the cover plate.

[0034] Figure 9 This is a schematic diagram of the overall structure of the variable friction energy dissipation device;

[0035] Figure 10 This is an exploded view of a variable friction energy dissipation device;

[0036] Figure 11 This is a schematic diagram of the working principle of a variable friction energy dissipation device.

[0037] Figure 12 A schematic diagram of the mechanical model of a variable friction energy dissipation self-resetting rotating self-resetting node;

[0038] Explanation of markings in the diagram:

[0039] 1-Bracket, 2-Rotating frame, 3-Cover plate, 4-Variable friction energy dissipation device, 5-Self-resetting device, 6-First back plate, 7-Bracket hook, 8-Second back plate, 9-Ear plate, 10-Rotating shaft, 11-Gear, 12-Connecting rod, 13-First pressure plate, 14-Self-resetting spring, 15-Second pressure plate, 16-Left limit nut, 17-Right limit nut, 18-Core rod, 19-Left tie nut, 20-Right tie nut, 21-First connector, 22-Second connector, 23-Rack, 24-Base plate, 25-Connecting side plate, 26-Fixing nut, 27-Disc spring string, 28-First side plate, 29-Top plate, 30-Friction pad, 31-Second side plate, 32-Connecting screw, 33-Intermediate plate, 34-Seat plate. Detailed Implementation

[0040] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0041] Unless otherwise specified, the functional components or structures in the following embodiments or examples are conventional components or structures used in the art to achieve the corresponding functions.

[0042] To improve energy dissipation and reset capabilities, and reduce seismic response and post-earthquake residual deformation, this invention provides a variable friction energy dissipation self-resetting rotating node, the structure of which can be referenced. Figures 1 to 11 As shown, it includes:

[0043] Bracket 1;

[0044] The rotating frame 2 is rotatably connected to the bracket 1 via the rotating shaft 10, and a gear 11 is also coaxially connected to the rotating shaft 10.

[0045] Two cover plates 3 are located above and below the rotating shaft 10, and a rack 23 that meshes with the gear 11 is also provided on the cover plate 3;

[0046] The self-resetting device 5 has its two ends connected to the bracket 1 and the cover plate 3, respectively.

[0047] And a variable friction energy dissipation device 4, whose two relatively misaligned moving ends are respectively connected to two cover plates 3.

[0048] For some specific implementation methods, please refer to [link / reference]. Figure 4 As shown, the bracket 1 includes a first back plate 6 and two bracket hooks 7 arranged vertically on the first back plate 6 and parallel to each other. The bracket hooks 7 are machined with grooves for placing the rotating shaft 10. Specifically, the grooves can be U-shaped, allowing the rotating shaft 10 to rotate relative to the grooves when placed inside. Additionally, the first back plate 6 has bolt holes for connecting to the self-resetting device 5, and can also connect to columns or column bases of the external main structure.

[0049] For some specific implementation methods, please refer to [link / reference]. Figure 5As shown, the rotating frame 2 includes a second back plate 8, an ear plate 9 vertically mounted on the second back plate 8, and a rotating shaft 10 mounted on the ear plate 9. A gear 11 is mounted at one end of the rotating shaft 10. One gear 11 can be mounted at each end of the rotating shaft 10 as needed. The second back plate 8 and the ear plate 9 are fixedly connected together, and the rotating shaft 10 is also fixedly connected to the ear plate 9. Furthermore, the gear 11 of this invention has the function of amplifying the rotational displacement of the node; the size of the gear 11 can be set as needed to achieve a larger rotational displacement.

[0050] For some specific implementation methods, please refer to [link / reference]. Figure 8 As shown, the cover plate 3 includes a base plate 24 and a connecting side plate 25 vertically mounted on the base plate 24 for connection with the self-resetting device 5. A rack 23 for meshing with the gear 11 is also machined on the surface of the base plate 24. Preferably, bolt holes can be provided on the connecting side plate 25 for connection with the self-resetting device 5. Similarly, bolt holes can also be provided on the base plate 24 for connection with the variable friction energy dissipation device 4. Depending on the needs, one or more self-resetting devices 5 connected to the cover plate 3 can be provided.

[0051] For some specific implementation methods, please refer to [link / reference]. Figures 6 to 7 As shown, the self-resetting device 5 includes a first connector 21, a second connector 22, a connecting rod 12, a first pressure plate 13, a second pressure plate 15, a self-resetting spring 14, and a core rod 18. At least one connecting rod 12 is fixedly installed on the first connector 21. The first pressure plate 13 and the second pressure plate 15 are slidably installed on the connecting rod 12. One end of the core rod 18 is fixed to the second connector 22, and the other end passes through the second pressure plate 15 and the first pressure plate 13 in sequence. The self-resetting spring 14 is also sleeved on the core rod 18, with its two ends respectively abutting against the first pressure plate 13 and the second pressure plate 15 and in a compressed state. Limiting nuts for limiting the stroke of the first pressure plate 13 and the second pressure plate 15 or the distance between them are also provided on both sides of the connecting rod 12. The core rod 18 is also provided with a first tie nut and a second tie nut (i.e., a left tie nut 19 and a right tie nut 20, respectively) for abutting against the first pressure plate 13 and the second pressure plate 15. With this design, the self-resetting spring 14 is always in a further compressed state, regardless of whether the self-resetting device 5 is under pressure or tension, thus providing the reset capability.

[0052] In a more specific embodiment, the position of the limiting nut on the connecting rod 12 is adjustable, and the position of the tie nut on the core rod is also adjustable, so as to achieve an adjustable maximum distance between the first pressure plate 13 and the second pressure plate 15.

[0053] In a more specific embodiment, multiple connecting rods 12 can be provided as needed. For example, four rods can be provided corresponding to the four corners of the first connecting head 21, and they can be parallel to each other. At the same time, the self-resetting spring 14 can be a disc spring.

[0054] In some specific embodiments, the variable friction energy dissipation device 4 includes a first side plate 28, a middle plate 33, a second side plate 31, and one or more connecting screws 32. The head of the connecting screw 32 abuts against the second side plate 31, and the tail passes through the second side plate 31, the middle plate 33, and the first side plate 28 in sequence, and then a fixing nut 26 is provided. A disc spring string 27 is also sleeved on the connecting screw 32 between the fixing nut 26 and the first side plate 28. The surface of the first side plate 28 facing the middle plate 33 is machined with a groove, and the surface of the middle plate 33 is machined with a protrusion corresponding to the groove. The middle plate 33 is also provided with a transverse groove for the connecting screw 32 to pass through and move horizontally. The middle plate 33 and the first side plate 28 serve as two relatively staggered moving ends, and each is selectively connected to one of the two cover plates 3.

[0055] In a more specific embodiment, the second side plate 31 is also provided with a friction piece 30 that contacts the intermediate plate 33.

[0056] In a more specific embodiment, both the groove and the protrusion have isosceles trapezoidal cross sections, and the upper base angles of the two isosceles trapezoids are equal. The base length of the protrusion is less than the base length of the groove. By reasonably designing the dimensional difference (i.e., the difference in base length) between the groove and the protrusion, a frictional energy dissipation stroke suitable for small to medium vibrations can be set.

[0057] In a more specific embodiment, a top plate 29 is fixedly installed on the top of the middle plate 33, and a seat plate 34 is fixedly installed on the bottom of the second side plate 31. Bolt holes are respectively opened on the top plate 29 and the seat plate 34 to connect the two cover plates 3.

[0058] Each of the above implementation methods can be implemented individually, or in any combination of two or more.

[0059] The above implementation methods will be described in more detail below with reference to specific embodiments.

[0060] Example 1:

[0061] The variable friction energy dissipation self-resetting rotary node in this embodiment consists of a bracket 1, a geared rotating frame 2, a rack-and-pinion cover plate 3, a variable friction energy dissipation device 4, and a self-resetting device 5. Figure 1 As shown.

[0062] Bracket 1 consists of a first back plate 6 and two bracket hooks 7, as follows: Figure 2As shown. The first back plate 6 and the bracket hook 7 are vertically fixed together. The bracket back plate has bolt holes for connecting the self-resetting device 5 and the column or column foot of the main structure.

[0063] The rotating frame 2 is composed of a second back plate 8, an ear plate 9, a rotating shaft 10, and a gear 11, as follows: Figure 3 As shown. The second back plate 8 and ear plate 9 are vertically fixed together, and the rotating shaft 10 is vertically fixed together with the ear plate 9. A gear 11 is fixed to each end of the rotating shaft 10. The rotating frame 2 is placed on the two bracket hooks 7 of the bracket 1 via the rotating shaft 10. The gear 11 has the function of amplifying the rotational displacement of the node. The size of the gear 11 can be set as needed to achieve a larger rotational displacement.

[0064] The self-resetting device 5 is composed of a connecting rod 12, a first pressure plate 13, a self-resetting spring 14, a second pressure plate 15, a left limiting nut 16, a right limiting nut 17, a core rod 18, a left tie nut 19, a right tie nut 20, a first connector 21, and a second connector 22. Figure 4 As shown. Four connecting rods 12 pass through the first pressure plate 13 and four left limiting nuts 16. The left end of the connecting rod 12 is fixed to the first connector 21, and the right end of the connecting rod 12 passes through the second pressure plate 15 and is connected to the four right limiting nuts 17. The first pressure plate 13 and the second pressure plate 15 have holes for the connecting rods 12 to pass through. The diameter of the holes is larger than the diameter of the connecting rods 12, allowing the first pressure plate 13 and the second pressure plate 15 to slide left and right along the connecting rods 12. A self-resetting spring 14 is located between the first pressure plate 13 and the second pressure plate 15, and it applies a preload. The left limiting nut 16 is located on the left side of the first pressure plate 13, and the right limiting nut is located on the right side of the second pressure plate 15. By adjusting the left limiting nut 16 and the right limiting nut 17, as well as the left tie nut and the right tie nut, the distance between the first pressure plate 13 and the second pressure plate 15 can be adjusted, thereby changing the preload on the self-resetting spring 14. The core rod 18 passes through the self-resetting spring 14, the first pressure plate 13, the second pressure plate 15, and the right tie nut 20. Its left end is connected to the left tie nut 19, and its right end is connected to the second connector 22. The first pressure plate 13 and the second pressure plate 15 have a hole between them for the core rod 18 to pass through. The diameter of this hole is larger than the diameter of the core rod 18, allowing it to pass freely through the first pressure plate 13 and the second pressure plate 15. The left tie nut 19 is located to the left of the first pressure plate 13, and the right tie nut 20 is located to the right of the second pressure plate 15. The diameters of both the left tie nut 19 and the right tie nut 20 are larger than the diameter of the hole in the first pressure plate 13 and the second pressure plate 15 through which they pass. Therefore, when the self-resetting device 5 is pulled, the second connector 22 drives the core rod 18, the core rod 18 drives the left tie nut 19, and the left tie nut 19 drives the first pressure plate 13 to compress the self-resetting spring 14. The right end of the self-resetting spring 14 is kept in place by the second pressure plate 15 and the right limit nut 17. Figure 5As shown. When the self-resetting device is compressed, the second connector 22 drives the core rod 18, the core rod 18 drives the right tie nut 20, and the right tie nut 20 drives the second pressure plate 15 to compress the self-resetting spring 14. The left end of the self-resetting spring 14 is kept in place by the first pressure plate 13 and the left limit nut 16. Figure 5 As shown. Therefore, regardless of whether the self-resetting device 5 is under compression or tension, the self-resetting spring 14 is always in a further compressed state, thus providing the reset capability.

[0065] The cover plate 3 is composed of a rack 23, a base plate 24, and a connecting side plate 25, as follows: Figure 6 As shown. Two racks 23 are located on the lower part of the base plate 24 and fixed together, and the connecting side plate 25 is located on the upper part of the base plate 24 and fixed together. The cover plate 3 is placed on the gear 11 of the rotating frame 2, and the racks 23 of the cover plate 3 and the gear 11 of the rotating frame 2 are engaged with each other. The base plate 24 of the cover plate 3 has bolt holes for connecting with the variable friction energy dissipation device 4 by bolts. The connecting side plate 25 of the cover plate 3 has bolt holes for connecting with the second connector 22 of the self-resetting device 5 by bolts. The first connector 21 of the self-resetting device 5 and the first back plate 6 of the bracket 1 are connected by bolts. Multiple self-resetting devices 5 connected to the cover plate 3 can be provided as needed.

[0066] The variable friction energy dissipation device 4 consists of a fixing nut 26, a disc spring string 27, a first side plate 28, a top plate 29, a friction plate 30, a second side plate 31, a connecting screw 32, an intermediate plate 33, and a seat plate 34. Figure 7 As shown. The top plate 29 and the middle plate 33 are fixed together, and the second side plate 31 and the seat plate 34 are fixed together. The first side plate 28, the friction plate 30 and the second side plate 31 have holes for the connecting screw 32 to pass through, and the middle plate 33 has a transverse groove for it to pass through and move horizontally. The connecting screw 32 passes through the second side plate 31, the friction plate 30, the middle plate 33, the first side plate 28, the disc spring string 27 and the fixing nut 26 in sequence and is connected together. The disc spring string 27 is preloaded by the fixing nut 26. The first side plate 28 has a groove and the middle plate 33 has a corresponding protrusion on the first side plate 28. The variable friction energy dissipation device 4 is connected to the top plate 29 and the upper cover plate 3 by bolts, and is also connected to the seat plate 34 and the lower cover plate 3 by bolts. The top plate 29 and the seat plate 34 of the variable friction energy dissipation device 4 have bolt holes for connecting to the upper and lower cover plates 3 by bolts, respectively. During the rotation of the node, the rotation of gear 11 will cause the upper and lower cover plates 3 to move relative to each other. The relative movement of the upper and lower cover plates 3 will cause the middle plate 33 to slide between the first side plate 28 and the second side plate 31. Figure 8As shown. In the initial sliding phase, the frictional force is constant. When the intermediate plate 33 slides until the inclined surface of the protrusion of the intermediate plate 33 and the inclined surface of the groove of the first side plate 28 are engaged, as the sliding continues, the intermediate plate 33 and the first side plate 28 begin to slide along the inclined surface. The gap between the first side plate 28 and the second side plate 31 increases, the first side plate 28 compresses the disc spring string 27, the preload of the disc spring string 27 increases, and the frictional force on the friction plate 30 increases. When the intermediate plate 33 has completely slid across the inclined surface, the frictional force remains constant again.

[0067] The preloaded adjustable rotary self-resetting node is implemented as follows:

[0068] (1) Install bracket hooks 7 on the first back plate 6 to form bracket 1.

[0069] (2) Install ear plate 9 on the second back plate 8, then install rotating shaft 10 on ear plate 9, and then install gear 11 at both ends of rotating shaft 10 to form rotating frame 2.

[0070] (3) Install racks 23 on both sides of the base plate 24, and then install connecting side plates 25 on the upper part of the base plate 24 to form a cover plate 3.

[0071] (4) Install right limit nuts 17 on each of the four tie rods (i.e., connecting rods 12), and then install right limit plates (i.e., second pressure plates 15) on the tie rods. Place disc springs (i.e., self-resetting springs 14) in the center of the four tie rods, and then install left limit plates (i.e., first pressure plates 13) and left limit nuts 16 on the tie rods. Achieve predetermined preload by adjusting the left limit nuts 16. Install core rods 18 inside the disc springs, then install left tie nuts 19 on the left end of core rods 18, and then install right tie nuts 20 on the core rod portion outside the right limit plate. Install left connectors (i.e., first connectors 21) on the left end of the tie rods, and then install right connectors (i.e., second connectors 22) on the right end of the core rods.

[0072] (5) The right connector of the self-resetting device is connected to the cover plate 3.

[0073] (6) Place the two cover plates with self-resetting devices on the upper and lower parts of the gear 11, and then connect the left connector of the self-resetting device to the first back plate 6 of the bracket.

[0074] (7) Secure the top plate 29 and the middle plate 33 together, and secure the right side plate (i.e., the second side plate 31) and the seat plate 34 together. Pass the connecting screw 32 through the right side plate, the friction plate 30, the middle plate 33, the left side plate (i.e., the first side plate 28), the disc spring string 27 and the fixing nut 26 in sequence, and connect them to each other.

[0075] (8) A variable friction energy dissipation device is installed between the bottom plates of the upper and lower cover plates using bolts.

[0076] (9) Connect the back plate of the bracket to the column, and connect the back plate of the rotating frame to the beam.

[0077] During the rotation of the node, the rotating shaft 10 drives the gear 11 to rotate. The rotation of the gear 11 drives the rack 23 to move horizontally, which in turn drives the connecting side plate 25 to pull and compress the self-resetting device 5. During the pulling and compressing process, the self-resetting spring 14 is always in a further compressed state, thus providing a reset capability. The rotation of the gear 11 causes the upper and lower cover plates 3 to move relative to each other, which in turn drives the variable friction energy dissipation device 4 to dissipate frictional energy. In the initial sliding stage under moderate earthquake action, the node rotation is small, and the frictional force of the variable friction energy dissipation device 4 is constant. Under strong earthquake action, the node rotation is large, and the sliding displacement of the variable friction energy dissipation device is large. After the intermediate plate 33 slides to the point where the inclined surface of the protrusion of the intermediate plate 33 and the inclined surface of the groove of the first side plate 28 are engaged, the frictional force begins to increase, and the energy dissipation capability is enhanced. See details. Figure 12 As shown, during the loading phase: when the node rotation is small, the friction force of the variable friction energy dissipation device 4 is constant, and the stiffness of the variable friction energy dissipation device 4 is 0. Therefore, the stiffness of the node is equal to the stiffness of the self-resetting device 5, i.e., the stiffness of the self-resetting spring 14. When the node rotation increases, the variable friction energy dissipation device 4 enters the variable friction phase, the friction force increases, and the stiffness of the node is equal to the stiffness of the self-resetting device 5 and the stiffness of the variable friction energy dissipation device 4, i.e., the sum of the stiffness of the self-resetting spring 14 and the disc spring string 27. When the node rotation stiffness further increases, the variable friction energy dissipation device 4 enters the constant friction phase again, and the stiffness of the node is equal to the stiffness of the self-resetting device 5. When the node changes from the loading phase to the unloading phase, the friction force changes direction, and the node mechanical model shows a descending segment, subsequently unloading with a stiffness similar to that of the loading phase. In addition, the mechanical models of the node's positive and negative rotations are completely symmetrical. The outstanding advantage of this node compared to ordinary nodes is that it can achieve variable friction force and variable stiffness. Under small-scale earthquakes, the nodes rotate relatively little. Because the rotational stiffness and energy dissipation capacity of the nodes are constant, they can effectively resist small-scale earthquakes. Under large-scale earthquakes, the seismic demand of the structure increases, and both the rotational stiffness and energy dissipation capacity of the nodes increase, thus enabling more effective resistance to large-scale earthquakes. Simultaneously, to prevent excessive node friction from causing the nodes to become unable to rotate and to prevent a rapid increase in internal forces, the friction is designed to stop increasing further after reaching a certain level.

[0078] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A variable friction energy dissipation self-centering rotational node, characterized by, The utility model relates to a self-resetting device and variable friction energy dissipation device for a rotary frame, and belongs to the field of mechanical engineering. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame.

2. A variable friction energy dissipation self-centering rotational node according to claim 1, characterized in that, The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame.

3. A variable friction energy dissipation self-centering rotational node according to claim 1, wherein, The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame.

4. A variable friction energy dissipation self-centering rotational node according to claim 1, wherein, The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame.

5. A variable friction energy dissipation self-centering rotational node according to claim 1, wherein, The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame.

6. A variable friction energy dissipation self-centering rotational node according to claim 5, wherein, The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame.

7. A variable friction energy dissipation self-centering rotational node according to claim 1, wherein, The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame.

8. A variable friction energy dissipation self-centering rotational node according to claim 7, wherein, The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame.

9. A variable friction energy dissipation self-centering rotational node according to claim 7, wherein, The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame.

10. A variable friction energy dissipation self-centering rotational node according to claim 7, wherein, The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy dissipation device for a rotary frame. The utility model discloses a rotary frame, a self-resetting device and a variable friction energy

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