A high-rise structure energy dissipation system based on rotary variable friction damper and operation method thereof

Abstract

This invention relates to a high-rise structure energy dissipation and vibration reduction system based on a rotational variable friction damper and its operation method. The system includes frame columns, a core tube, a chain rod assembly, and friction energy dissipation components. This invention amplifies the minute displacements generated by the core tube through the chain rod assembly, thereby enabling the friction energy dissipation components to function effectively. The friction plates exhibit a special wavy, concave-convex structure. When the friction plates rotate relative to each other, the front and rear friction plates expand outwards and compress the outer disc springs, which increases the contact pressure between the friction plates, thereby increasing friction and improving the friction energy dissipation effect. Furthermore, this invention enables the nodes to self-reset after being electrically heated through the deformed shape memory alloy stranded wire. Compared with existing technologies, this invention combines displacement amplification, variable friction energy dissipation, and self-resetting features, resulting in low construction costs, simple installation, and good friction energy dissipation effect.

Description

Technical Field

[0001] This invention relates to the field of core tube deformation control technology, and in particular to a high-rise structure energy dissipation and vibration reduction system based on a rotating variable friction damper and its operation method. Background Technology

[0002] Frame-core tube structures are one of the most commonly used structural systems in high-rise and super high-rise buildings. In a frame-core tube structure, the core tube primarily bears lateral loads such as earthquakes and wind, ensuring that the structure does not undergo significant lateral deformation; the outrigger trusses of the core tube can adjust the stress and deformation of the core tube. As the first and most critical line of defense against various natural disasters, the outrigger truss system possesses important attributes such as high stiffness, concentrated energy dissipation, and post-disaster replaceability, making it a resilient structural system.

[0003] Traditional structural design typically achieves design goals by directly increasing the strength and stiffness of the structure. However, this approach suffers from long construction periods, large construction areas, and potential damage to the existing structure. Damped outrigger truss systems, due to the addition of dampers, not only concentrate energy dissipation but also effectively control structural response, preventing damage to the main structure and certain critical components. Commonly used dampers in current engineering projects include liquid viscous dampers and metal yield-type dampers. For example, Chinese patent CN103774767A discloses a combined high-rise structure energy dissipation and vibration reduction reinforcement layer, which improves the overall lateral stiffness of the structure by incorporating metal yield-type dampers and viscous dampers on the energy dissipation and vibration reduction outrigger truss.

[0004] However, existing dampers have drawbacks such as complex manufacturing processes, difficult installation, and unstable performance, which hinder their large-scale promotion. Summary of the Invention

[0005] The purpose of this invention is to provide a high-rise structure energy dissipation and vibration reduction system based on a rotating variable friction damper and its operation method, which has low construction cost, simple installation, and good friction energy dissipation effect.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] This invention provides a high-rise structure energy dissipation and vibration reduction system based on a rotary variable friction damper, including a frame column, a core tube, a chain rod assembly, and a friction energy dissipation component. The frame column and the core tube are rigidly connected by a lower chord, and the friction energy dissipation component is disposed in the middle of the lower chord.

[0008] The friction energy dissipation component includes a friction plate assembly and a rotating shaft. The friction plate assembly includes an upper friction plate and front and rear friction plates symmetrically arranged on both sides of the upper friction plate. The rotating shaft passes through the upper friction plate, the front friction plate, the rear friction plate, and the lower chord.

[0009] The chain rod assembly includes an upper chain rod, an enlarged chain rod, and a lower chain rod. One end of the upper chain rod is rigidly connected to the core tube, and the other end is hinged to the enlarged chain rod. One end of the enlarged chain rod is hinged to the frame column, and the other end is hinged to one end of the lower chain rod. The other end of the lower chain rod is connected to the upper friction plate by a pin.

[0010] The chain rod assembly can amplify the displacement generated during the lateral deformation of the core tube, and can cause relative rotation between the upper friction plate, the front friction plate, and the rear friction plate through the pins.

[0011] Preferably, the other end of the upper chain rod is hinged to the amplifying chain rod via a lever fulcrum, one end of the amplifying chain rod is hinged to the frame column via a first hinge node, and the other end of the amplifying chain rod is connected to one end of the lower chain rod via a second hinge node.

[0012] Preferably, the upper friction plate is teardrop-shaped, including a narrow upper friction plate adjustment end and a wide upper friction plate connecting bottom.

[0013] Preferably, the other end of the lower chain rod is connected to the adjusting end of the upper friction plate by a pin, and the front friction plate and the rear friction plate are symmetrically arranged on both sides of the bottom of the upper friction plate connection.

[0014] Preferably, the upper friction plate adjustment end is provided with a plurality of adjustment holes along its central axis, and the lower chain rod is provided with a connection hole at the end connected to the upper friction plate adjustment end, and the pin passes through the connection hole and the adjustment hole.

[0015] More preferably, when the lower chain rod is driven to move laterally by the enlarged chain rod, the lower chain rod drives the upper friction plate to rotate around the rotation axis through the pin, and the lever arm length can be adjusted by switching the position of the adjustment hole.

[0016] In this invention, the chain rod assembly consisting of the upper chain rod, the amplifying chain rod, and the lower chain rod can amplify the minute displacement generated when the core tube is subjected to lateral deformation through leverage.

[0017] More preferably, the position of the lever fulcrum needs to take into account the relative displacement transmission efficiency between the outer frame and the core tube, and is usually set near the first hinge node, with the distance from the first hinge node being 1 / 3 to 1 / 2 of the length of the enlarged chain rod.

[0018] More preferably, the length and angle of the upper chain rod mainly depend on the space constraints between the outer frame and the core tube. The length of the upper chain rod can be between 3 and 6 meters, and the angle between the upper chain rod and the horizontal direction is usually between 15° and 30°.

[0019] More preferably, the length of the magnifying chain rod is generally between 2 and 5 meters; the angle between it and the outer frame is generally between 45° and 60°. This angle range allows the magnifying chain rod to achieve a good balance in the transmission of horizontal and vertical forces.

[0020] In this invention, the length and angle of the amplifying chain rod depend on the required magnification factor of the lever. If a larger displacement magnification factor is desired, its length can be appropriately increased, but structural space constraints and the stability of the rod itself must be considered.

[0021] More preferably, the length and angle of the lower chain rod need to ensure a reasonable geometric relationship with the second hinge node, the main body of the energy dissipation device, etc., so as to achieve a stable force transmission path. Its length is generally 2 to 4 meters, and the angle with the horizontal direction is generally 15° to 30°.

[0022] Preferably, the rotating shaft passes through the central holes of the upper friction plate connecting the bottom, the front friction plate, and the rear friction plate. The front and rear friction plates each have four mounting through holes, which are distributed in a ring at 90° angles with the central hole as the center. The upper friction plate connecting the bottom has four corresponding limiting holes, and the central axes of the mounting through holes and the limiting holes coincide. A pre-tightening screw passes through each set of corresponding mounting through holes and limiting holes.

[0023] More preferably, the preload screw is provided with a disc spring and a limiting nut, the limiting nut being able to press the disc spring against the outer surfaces of the front friction plate and the rear friction plate respectively, generating initial prestress.

[0024] Preferably, a guide rail is axially provided on the rotating shaft, and the parts of the front friction plate and the rear friction plate that contact the rotating shaft are provided with corresponding protruding guide blocks, so that the front friction plate and the rear friction plate can only move back and forth along the axial direction of the rotating shaft and cannot rotate around the rotating shaft.

[0025] Preferably, the rotating shaft is further provided with a limiting structure, which is respectively provided on both sides of the upper friction plate. The limiting structure allows the upper friction plate to rotate only around the rotating shaft and prevents it from moving back and forth along the axial direction of the rotating shaft.

[0026] Preferably, the limiting hole is designed so that the rotation angle of the upper friction plate around the rotation axis does not exceed 15° clockwise or counterclockwise.

[0027] Preferably, the front friction plate, the upper friction plate connected to the bottom, and the rear friction plate are provided with multiple matching wave-shaped concave and convex structures on the side where they contact each other.

[0028] Preferably, the side of the front friction plate, the upper friction plate connected to the bottom, and the rear friction plate that contacts each other is provided as a friction material layer, and the material of the friction material layer includes rubber, resin, and carbon fiber.

[0029] Preferably, the upper friction plate has four symmetrical anchoring points on the outer periphery of the bottom, and each anchoring point is connected to the lower chord end point on its corresponding side by a shape memory alloy stranded wire to form an oblique anchoring connection.

[0030] Preferably, the shape memory alloy stranded wire is wrapped with an insulating protective sleeve, and each end of the lower chord is provided with an energizing device. The energizing device is electrically connected to the shape memory alloy stranded wire. The energizing device heats the shape memory alloy stranded wire by energizing it, which enables the energy dissipation and vibration reduction system of the deformed high-rise structure to achieve self-reset.

[0031] Preferably, the device further includes a controller and a probe. One end of the controller is communicatively connected to the power supply device, and the other end is communicatively connected to the probe. The probe is mounted on a support rod, which is vertically mounted on the core tube. The probe is capable of monitoring the lateral deformation of the core tube.

[0032] More preferably, the probe can detect its own specific position coordinates and collect the relative deformation of the core tube and the frame column over time through data acquisition and signal analysis. After calculation by the controller, the signal to correct the deformation is transmitted to the power supply device.

[0033] More preferably, the energizing device heats the shape memory alloy stranded wire by energizing it, thereby utilizing the properties of the shape memory alloy to control and eliminate deformation.

[0034] More preferably, the communication connection includes a wireless connection or a connection via a wire.

[0035] More preferably, the controller is a microcontroller or any one of x86, ARM, or RISC-V architecture processors.

[0036] This invention also provides an operation method for a high-rise structure energy dissipation and vibration reduction system based on a rotating variable friction damper, comprising the following steps:

[0037] S1: Connect the lower chain rod to the upper friction plate using a pin;

[0038] S2: The small displacement generated by the lateral deformation of the core tube is amplified by the chain rod component group and converted into the relative rotation between the friction plates of the friction plate group, generating friction damping force.

[0039] More preferably, the operation method of the high-rise structure energy dissipation and vibration reduction system based on the rotating variable friction damper includes the following steps:

[0040] S1: Select the appropriate adjustment hole according to the actual engineering needs, and connect the lower chain rod and the upper friction plate through the pin;

[0041] S2: Adjust the limit nut to apply initial preload to the disc spring;

[0042] S3: The small displacement generated by the lateral deformation of the core tube is amplified and converted into the relative rotation between the friction plates of the friction plate group by the chain rod component group;

[0043] S4: Misalignment occurs between the friction plates, compressing the disc spring outward. This increases the contact pressure between the friction plates, increases the friction force, and increases the friction damping force.

[0044] S5: By energizing the shape memory alloy stranded wire, the self-resetting of the energy dissipation and vibration reduction system of the high-rise structure is achieved.

[0045] This invention provides a high-rise structure energy dissipation and vibration reduction system based on a rotary variable friction damper. The chain rod component assembly of this invention can amplify small displacements, thereby enabling the friction energy dissipation component to function effectively. Furthermore, the lever arm length can be changed by using different adjustment holes on the friction plates, thus adjusting the friction damping force. In addition, this invention designs the friction energy dissipation component with a special protrusion and groove shape. When the friction plates rotate relative to each other, the front and rear friction plates expand outwards and compress the outer disc spring, which helps to increase the contact pressure between the friction plates, thereby increasing the friction force and improving the friction energy dissipation effect. Moreover, this system can detect the magnitude of deformation using a probe mounted on the support rod. After heat treatment of the deformed shape memory alloy stranded wire, the nodes can self-reset.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] (1) This invention provides a high-rise structure energy dissipation and vibration reduction system based on a rotating variable friction damper. The small displacement generated by the core tube can be amplified by the chain rod component group, so that the specially designed friction energy dissipation component can play an effective role, thereby adjusting the friction damping force, which has a good friction energy dissipation effect, and the construction cost is low and the installation is simple.

[0048] (2) In this invention, the chain rod component group (displacement amplification structure) can amplify small displacements and adjust the lever arm length by adjusting different adjustment holes on the upper friction plate according to the needs of actual engineering, thereby adjusting the friction damping force so that the friction energy dissipation component can play an effective role, thereby maximizing the energy consumption and deformation control capabilities of the system.

[0049] (3) The present invention designs the friction plate group in the friction energy dissipation component as a special protrusion and groove shape. When the friction plates rotate relative to each other, they expand outward and compress the outer disc spring, which can increase the contact pressure between each friction plate, thereby increasing the friction force and improving the friction energy dissipation effect.

[0050] (4) When the structure is deformed by external force, the present invention can achieve self-resetting by heating the shape memory alloy stranded wire with electricity, thereby reducing the cost of correction after the structure is deformed laterally.

[0051] (5) The high-rise structure energy dissipation and vibration reduction system based on the rotating variable friction damper provided by the present invention combines the features of self-resetting, displacement amplification, and variable friction energy dissipation, which can reduce construction costs, improve construction efficiency and facilitate later maintenance and replacement. Attached Figure Description

[0052] Figure 1 This is a front view of a high-rise structure energy dissipation and vibration reduction system based on a rotary variable friction damper according to the present invention.

[0053] Figure 2 This is a three-dimensional schematic diagram of a friction energy dissipation component in a high-rise structure energy dissipation and vibration reduction system based on a rotary variable friction damper according to the present invention.

[0054] Figure 3 This is a front view of the upper friction plate in a high-rise structure energy dissipation and vibration reduction system based on a rotary variable friction damper according to the present invention.

[0055] Figure 4 This is a front structural view of the front friction plate in a high-rise structure energy dissipation and vibration reduction system based on a rotary variable friction damper according to the present invention.

[0056] In the diagram: 1-Frame column; 2-Core tube; 3-Lower chord; 4-Chain rod assembly; 41-Upper chain rod; 42-Enlarging chain rod; 43-Lower chain rod; 44-Lever fulcrum; 45-First hinge node; 46-Second hinge node; 5-Friction energy dissipation component; 51-Friction plate assembly; 511-Upper friction plate; 5111-Upper friction plate adjustment end; 5112-Upper friction plate connection bottom; 512-Front friction plate; 513-Rear friction plate; 514-Center hole; 515-Mounting through hole; 516-Limiting hole; 517-Adjusting hole; 52-Rotating shaft; 53-Preload screw; 531-Disc spring; 532-Limiting nut; 6-Pin; 7-Shape memory alloy stranded wire; 8-Insulating protective sleeve; 9-Power supply device; 10-Probe; 11-Support rod. Detailed Implementation

[0057] 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.

[0058] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0060] 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.

[0061] Example 1

[0062] A high-rise structure energy dissipation and vibration reduction system based on a rotational variable friction damper, such as Figure 1 As shown, it includes a frame column 1, a core tube 2, a chain rod assembly 4, and a friction energy dissipation component 5. The frame column 1 and the core tube 2 are rigidly connected by a lower chord 3.

[0063] The friction energy dissipation component 5 is mainly composed of a friction plate group 51 and a rotating shaft 52. The friction plate group 51 includes an upper friction plate 511, a front friction plate 512 and a rear friction plate 513. The front friction plate 512 and the rear friction plate 513 are respectively arranged on both sides of the upper friction plate 511. The rotating shaft 52 passes through all the friction plates and the lower chord 3, thereby fixing the friction energy dissipation component 5 in the middle of the lower chord 3.

[0064] The chain rod assembly 4 mainly consists of an upper chain rod 41, an enlarged chain rod 42, and a lower chain rod 43. The upper chain rod 41 is rigidly connected to the core tube 2 and hinged to the enlarged chain rod 42. The enlarged chain rod 42 is hinged to the frame column 1 and the lower chain rod 43. The lower chain rod 43 is hinged to the enlarged chain rod 42 and connected to the upper friction plate 511 via a pin 6.

[0065] When the core tube 2 undergoes lateral deformation, the chain rod assembly 4 amplifies the displacement, and through the pin 6, the friction plates of the friction plate assembly rotate relative to each other, thereby consuming energy and achieving the purpose of shock absorption.

[0066] Example 2

[0067] A high-rise structure energy dissipation and vibration reduction system based on a rotational variable friction damper, such as Figure 2 As shown, based on Example 1,

[0068] The upper friction plate 511 is teardrop-shaped, including a narrow upper friction plate adjusting end 5111 and a wide upper friction plate connecting bottom 5112. The rotating shaft 52 passes through the central hole 514 of the upper friction plate connecting bottom 5112, the front friction plate 512, and the rear friction plate 513, thereby symmetrically arranging the front friction plate 512 and the rear friction plate 513 on both sides of the upper friction plate connecting bottom 5112.

[0069] In this embodiment, the front friction plate 512 and the rear friction plate 513 can only move back and forth along the rotation axis 52 and cannot rotate around the rotation axis 52. The upper friction plate 511 can only rotate around the rotation axis 52 and cannot move back and forth along the rotation axis 52. Multiple matching wavy convex and concave structures are provided on the side where the front friction plate 512, the upper friction plate connecting to the bottom 5112, and the rear friction plate 513 contact each other. The side where the front friction plate 512, the upper friction plate connecting to the bottom 5112, and the rear friction plate 513 contact each other is a friction material layer, and the material of the friction material layer includes rubber, resin, and carbon fiber.

[0070] One end of the upper chain rod 41 is rigidly connected to the core tube 2, and the other end is hinged to the amplifying chain rod 42 via the lever fulcrum 44. One end of the amplifying chain rod 42 is hinged to the frame column 1 via the first hinge node 45, and the other end is connected to one end of the lower chain rod 43 via the second hinge node 46. The other end of the lower chain rod 43 is connected to the upper friction plate adjusting end 5111 via a pin 6. The upper friction plate adjusting end 5111 is provided with multiple adjusting holes 517 along its central axis. The end of the lower chain rod 43 connected to the upper friction plate adjusting end 5111 is provided with a connecting hole, and the pin 6 passes through the connecting hole and the adjusting hole 517.

[0071] like Figure 3-4As shown, the front friction plate 512 and the rear friction plate 513 each have four mounting through holes 515, which are arranged in a ring at 90° angles with the central hole 514 as the center. The upper friction plate connecting bottom 5112 has four corresponding limiting holes 516. The central axes of the mounting through holes 515 and the limiting holes 516 coincide, and a preload screw 53 passes through each set of corresponding mounting through holes 515 and limiting holes 516. The preload screw 53 is equipped with a disc spring 531 and a limiting nut 532. The limiting nut 532 can press the disc spring 531 against the outer surfaces of the front friction plate 512 and the rear friction plate 513 respectively, generating initial prestress.

[0072] In this embodiment, when the core tube 2 undergoes lateral deformation under external force, it generates a small displacement. The chain rod component group 4, composed of the upper chain rod 41, the amplifying chain rod 42, and the lower chain rod 43, can amplify the small displacement based on the lever effect. When the lower chain rod 43 is driven to move laterally by the amplifying chain rod 42, the lower chain rod 43 drives the upper friction plate 511 to rotate around the rotation axis 52 through the pin 6. At this time, the friction plates are misaligned and compress the disc spring 531 outward. The contact pressure between the friction plates increases, the friction increases, and thus the friction damping force increases.

[0073] This embodiment allows for adjustment of the lever arm length by switching the position of the adjustment hole 517.

[0074] Example 3

[0075] A high-rise structure energy dissipation and vibration reduction system based on a rotary variable friction damper, building upon Embodiment 2, includes an axially mounted guide rail on the rotating shaft 52. Corresponding protruding guide blocks are provided on the portions of the front friction plate 512 and the rear friction plate 513 that contact the rotating shaft 52, thereby ensuring that the front and rear friction plates can only move back and forth along the axial direction of the rotating shaft 52, preventing them from rotating around it. A limiting structure is also provided on the rotating shaft 52, with the limiting structures located on both sides of the upper friction plate 511. This limiting structure ensures that the upper friction plate 511 can only rotate around the rotating shaft 52, preventing it from moving back and forth along the axial direction of the rotating shaft 52. In this embodiment, the limiting hole 516 is an arc-shaped structure, ensuring that the rotation angle of the upper friction plate 511 around the rotating shaft 52 does not exceed 15° clockwise or counterclockwise.

[0076] Example 4

[0077] A high-rise structure energy dissipation and vibration reduction system based on a rotational variable friction damper, in addition to the system described in Example 3, has four symmetrical anchoring points on the outer periphery of the bottom 5112 of the upper friction plate. Each anchoring point is connected to the corresponding end of the lower chord 3 by a shape memory alloy stranded wire 7 in an oblique anchoring manner. The shape memory alloy stranded wire 7 is wrapped with an insulating protective sleeve 8. Each end of the lower chord 3 is provided with an energizing device 9, which is electrically connected to the shape memory alloy stranded wire 7.

[0078] This embodiment also includes a controller and a probe 10. The two ends of the controller are connected to the power supply device 21 and the probe 24 wirelessly or via wires. The probe 10 is mounted on the support rod 11, which is vertically mounted on the core cylinder 2. The controller is a microcontroller or a processor based on x86, ARM, or RISC-V architectures. The probe 10 can detect its own specific position coordinates and collect the relative deformation of the frame column 1 and the core cylinder 2 over time through data acquisition and signal analysis. After calculation by the controller, the signal to correct the deformation is transmitted to the power supply device 9. The power supply device 9 heats the shape memory alloy stranded wire 7 by energizing it, thereby utilizing the properties of the shape memory alloy to control and eliminate the deformation.

[0079] The operation method of this embodiment is as follows: When the core tube 2 undergoes a large lateral deformation under the action of external force, the upper chain rod 41 drives the amplifying chain rod 42 to rotate around the first hinge node 45. The rotation of the amplifying chain rod 42 drives the lower chain rod 43 to move laterally. The lower chain rod 43 drives the upper friction plate 511 to rotate around the rotation axis 52 through the pin 6. Through the amplification effect of the upper chain rod 41, the amplifying chain rod 42, and the lower chain rod 43, the high-rise structure energy dissipation and vibration reduction system based on the self-resetting rotary variable friction damper in this embodiment can amplify the small displacement generated by the deformation of the core tube 2 by tens of times, improve the energy dissipation effect of the energy dissipation component, and thus maximize the energy dissipation and deformation control capabilities of the system. After the upper friction plate 511 rotates at a certain angle, the overlapping portions of the upper friction plate 511 with the front friction plate 512 and the rear friction plate 513 become misaligned. The friction protrusions and friction grooves on each friction plate are no longer tightly fitted, causing the front friction plate 512 and the rear friction plate 513 to expand outward relative to the upper friction plate 511 and compress the disc spring 531 on the outer side of the front friction plate 512 and the rear friction plate 513. After being compressed, the disc spring 531 exerts increased pressure on the front friction plate 512 and the rear friction plate 513, which helps to increase the contact pressure between the friction plates, thereby increasing the frictional force. Through the reciprocating relative rotation between the friction plates, the frictional energy dissipation effect is improved.

[0080] After the core tube 2 deforms, this embodiment can also monitor the magnitude of the deformation of the core tube 2 by means of a probe 24 installed on the support rod 11. After the deformed shape memory alloy stranded wire 7 is heat-treated by means of an energizing device 9, its restoring force can make the deformed node self-reset.

[0081] 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 high-rise structure energy dissipation and vibration reduction system based on a rotating variable friction damper, characterized in that, It includes a frame column (1), a core tube (2), a chain rod assembly (4), and a friction energy dissipation component (5). The frame column (1) and the core tube (2) are rigidly connected by a lower chord (3), and the friction energy dissipation component (5) is located in the middle of the lower chord (3). The friction energy dissipation component (5) includes a friction plate group (51) and a rotating shaft (52). The friction plate group (51) includes an upper friction plate (511) and a front friction plate (512) and a rear friction plate (513) symmetrically arranged on both sides of the upper friction plate (511). The rotating shaft (52) passes through the upper friction plate (511), the front friction plate (512), the rear friction plate (513) and the lower chord (3). The chain rod assembly (4) includes an upper chain rod (41), an enlarged chain rod (42), and a lower chain rod (43). One end of the upper chain rod (41) is rigidly connected to the core tube (2), and the other end is hinged to the enlarged chain rod (42). One end of the enlarged chain rod (42) is hinged to the frame column (1), and the other end is hinged to one end of the lower chain rod (43). The other end of the lower chain rod (43) is connected to the upper friction plate (511) through a pin (6). The chain rod assembly (4) can amplify the displacement generated when the core tube (2) deforms laterally, and can make the upper friction plate (511), the front friction plate (512), and the rear friction plate (513) rotate relative to each other through the pin (6); The upper friction plate (511) is teardrop-shaped and includes a narrow upper friction plate adjustment end (5111) and a wide upper friction plate connecting bottom (5112). The other end of the lower chain rod (43) is connected to the upper friction plate adjustment end (5111) by a pin (6); the front friction plate (512) and the rear friction plate (513) are symmetrically arranged on both sides of the bottom (5112) of the upper friction plate connection. The upper friction plate adjustment end (5111) is provided with a plurality of adjustment holes (517) along its central axis. The lower chain rod (43) is connected to the upper friction plate adjustment end (5111) with a connection hole. The pin (6) passes through the connection hole and the adjustment hole (517). When the lower chain rod (43) is driven to move laterally by the enlarged chain rod (42), the lower chain rod (43) drives the upper friction plate (511) to rotate around the rotating shaft (52) through the pin (6), and the lever arm length can be adjusted by switching the position of the adjustment hole (517).

2. The high-rise structure energy dissipation and vibration reduction system based on a rotational variable friction damper according to claim 1, characterized in that, The other end of the upper chain rod (41) is hinged to the amplifying chain rod (42) through the lever fulcrum (44), and one end of the amplifying chain rod (42) is hinged to the frame column (1) through the first hinge node (45); the other end of the amplifying chain rod (42) is connected to one end of the lower chain rod (43) through the second hinge node (46).

3. The high-rise structure energy dissipation and vibration reduction system based on a rotational variable friction damper according to claim 1, characterized in that, The rotating shaft (52) passes through the center hole (514) of the upper friction plate connecting bottom (5112), the front friction plate (512), and the rear friction plate (513). The front friction plate (512) and the rear friction plate (513) are each provided with 4 mounting through holes (515). The mounting through holes (515) are distributed in a ring at a 90° angle with the center hole (514) as the center. The upper friction plate connecting bottom (5112) is provided with 4 limiting holes (516). The central axis of the mounting through holes (515) and the limiting holes (516) coincides. A pre-tightening screw (53) passes through each set of corresponding mounting through holes (515) and limiting holes (516).

4. The high-rise structure energy dissipation and vibration reduction system based on a rotating variable friction damper according to claim 3, characterized in that, The preload screw (53) is provided with a disc spring (531) and a limiting nut (532). The limiting nut (532) can press the disc spring (531) against the outer surfaces of the front friction plate (512) and the rear friction plate (513) respectively to generate initial prestress.

5. The high-rise structure energy dissipation and vibration reduction system based on a rotating variable friction damper according to claim 3, characterized in that, A guide rail is axially provided on the rotating shaft (52), and the front friction plate (512) and the rear friction plate (513) are provided with corresponding protruding guide blocks in the parts that contact the rotating shaft (52), so that the front friction plate (512) and the rear friction plate (513) can only move back and forth along the axial direction of the rotating shaft (52) and cannot rotate around the rotating shaft (52); The rotating shaft (52) is also provided with a limiting structure. The limiting structure is respectively provided on both sides of the upper friction plate (511). The limiting structure makes the upper friction plate (511) only able to rotate around the rotating shaft (52) and unable to move back and forth along the axis of the rotating shaft (52). The limiting hole (516) is provided so that the rotation angle of the upper friction plate (511) around the rotation axis (52) does not exceed 15° clockwise or counterclockwise.

6. The high-rise structure energy dissipation and vibration reduction system based on a rotational variable friction damper according to claim 1, characterized in that, Multiple matching wave-shaped concave-convex structures are provided on the side where the front friction plate (512), the upper friction plate connecting the bottom (5112), and the rear friction plate (513) are in contact with each other. The sides of the front friction plate (512), the upper friction plate connected to the bottom (5112), and the rear friction plate (513) that are in contact with each other are provided as friction material layers, and the materials of the friction material layers include rubber, resin, and carbon fiber.

7. The high-rise structure energy dissipation and vibration reduction system based on a rotational variable friction damper according to claim 1, characterized in that, The upper friction plate is connected to the bottom (5112) with four symmetrical anchoring points on the outer periphery. Each anchoring point and the lower chord (3) end point on the corresponding side are connected by a shape memory alloy stranded wire (7) to form an oblique anchoring connection. The shape memory alloy stranded wire (7) is wrapped with an insulating protective sleeve (8). Each end of the lower chord (3) is provided with an energizing device (9). The energizing device (9) is electrically connected to the shape memory alloy stranded wire (7). The energizing device (9) heats the shape memory alloy stranded wire (7) by energizing it, which enables the energy dissipation and vibration reduction system of the deformed high-rise structure to achieve self-reset.

8. The high-rise structure energy dissipation and vibration reduction system based on a rotational variable friction damper according to claim 7, characterized in that, It also includes a controller and a probe (10). One end of the controller is connected to the power supply device (9) and the other end is connected to the probe (10). The probe (10) is mounted on a support rod (11). The support rod (11) is vertically mounted on the core tube (2). The probe (10) can monitor the lateral deformation of the core tube (2).

9. A method for operating a high-rise structure energy dissipation and vibration reduction system based on a rotating variable friction damper as described in any one of claims 1-8, characterized in that, Includes the following steps: S1: Connect the lower chain rod (43) to the upper friction plate (511) through a pin (6); S2: The small displacement generated by the lateral deformation of the core tube (2) is amplified by the chain rod component group (4) and converted into the relative rotation between the friction plates of the friction plate group (51), generating friction damping force.

Images