Composite self-centering energy dissipation brace device

Abstract

The application discloses a composite self-resetting energy dissipation support device, and belongs to the technical field of building structure energy dissipation and shock absorption. The device comprises a support cylinder, a first rod and a second rod in the support cylinder, and the end of the second rod is sleeved with the end of the first rod and both can slide relative to each other. The second rod is sleeved with an outer sleeve, one end of the outer sleeve is connected with the first rod through a displacement amplification system, a viscous liquid chamber for energy dissipation through fluid damping is arranged between the outer side wall of the outer sleeve and the inner side wall of the support cylinder, and the outer side of the overlapping part of the first rod and the second rod is provided with a shape memory alloy energy dissipation system. The self-resetting characteristic of SMA is utilized to realize the decoupling of the energy dissipation process and the reset process, energy can be dissipated in large deformation, and the original state can be automatically restored after the load disappears, so that the recoverability and seismic toughness of the structure are greatly improved. Meanwhile, the application integrates three energy dissipation approaches of friction, fluid damping and memory alloy super-elasticity, and three mechanisms are cooperated to realize multi-stage energy dissipation effect.

Description

Technical Field

[0001] This invention belongs to the field of building structure energy dissipation and vibration reduction technology, specifically relating to a composite self-resetting energy dissipation support device. Background Technology

[0002] As modern engineering structures develop towards ultra-high and long-span structures, their vulnerability to dynamic disasters such as earthquakes and strong winds is becoming increasingly prominent. Traditional passive energy dissipation devices, such as metal yield dampers, friction dampers, and viscous dampers, face significant bottlenecks in practical applications: metal dampers come at the cost of irreversible plastic damage, leading to post-earthquake residual displacement and repair challenges; the performance stability of friction dampers is heavily dependent on the contact surface condition and lacks adaptive adjustment capabilities; and viscous dampers are difficult to activate under small displacements, and their recovery capability depends on the structure itself.

[0003] Against this backdrop, smart materials and composite design have become key directions for overcoming the aforementioned limitations. Among them, shape memory alloys (SMAs) have attracted much attention due to their unique hyperelastic effect. SMAs can completely recover their original shape after experiencing strains of up to 8%, while dissipating a large amount of energy through stress-induced martensitic phase transformation. This provides a revolutionary material basis for resolving the fundamental contradiction between energy dissipation and restoring function in traditional dampers. The academic community has widely confirmed that SMAs are ideal materials for achieving structural self-restoration and high energy dissipation.

[0004] However, existing self-resetting energy dissipation devices using only SMA components have limited energy dissipation density, insufficient response to small excitations, and weak compressive strength of SMA materials, making them prone to instability in complex tensile and compressive cyclic environments. Furthermore, some self-resetting energy dissipation devices employing multiple energy dissipation mechanisms have low coupling between their SMA components and other energy dissipation mechanisms, making it difficult to achieve optimal synergy and resulting in low performance superposition efficiency.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a composite self-resetting energy-dissipating support device to solve the problems of low energy density, easy instability under pressure, and poor coupling effect when multiple mechanisms work together.

[0007] To achieve the above objectives, the present invention provides the following technical solution: This composite self-resetting energy-dissipating support device includes a support cylinder and a first rod and a second rod disposed therein. One end of the second rod is sleeved on one end of the first rod, and the two can slide relative to each other. The other end of the second rod is fixedly connected to the inner wall of one end of the support cylinder, and the other end of the first rod extends to the outer side of the other end of the support cylinder. The other end is connected to one end of a displacement amplification system, and the other end of the displacement amplification system is connected to the first rod. A viscous liquid chamber for energy dissipation through fluid damping is provided between the outer wall of the outer sleeve and the inner wall of the support cylinder. A shape memory alloy energy dissipation system is provided on the outer side of the overlapping portion of the first rod and the second rod.

[0008] Specifically, the first spring is made of shape memory alloy.

[0009] Specifically, the viscous liquid chamber is filled with viscous liquid.

[0010] Furthermore, the shape memory alloy energy dissipation system includes a friction ring sleeved on the outside of the second rod and multiple sets of alloy rod energy dissipation units distributed circumferentially along the friction ring. The alloy rod energy dissipation units are made of shape memory alloy. A first sliding groove is formed on the side wall of the second rod along its length. A bolt is provided on the inner wall of the friction ring. The bolt passes through the first sliding groove and is fixedly connected to the first rod.

[0011] Furthermore, the alloy rod energy dissipation unit includes a first memory alloy rod and a second memory alloy rod. One end of the first memory alloy rod and the second memory alloy rod on the same side are hinged to the outer wall of the friction ring, and the other end on the same side are slidably connected to the inner wall of the support cylinder through sliding components, so that the first memory alloy rod and the second memory alloy rod are V-shaped.

[0012] Furthermore, the sliding assembly includes a sliding rod and a sliding base fixed to the inner wall of the support cylinder. The sliding base has a second sliding groove for the sliding rod to move horizontally. One end of the sliding rod is hinged to a first memory alloy rod or a second memory alloy rod, and the other end is provided with a limiting block to prevent the sliding rod from falling out of the second sliding groove.

[0013] Furthermore, the alloy rod energy dissipation unit also includes a third memory alloy rod connected between the first memory alloy rod and the second memory alloy rod.

[0014] Furthermore, a sleeve is provided on the outer side of the first and second memory alloy rods, the sleeve being used to support the first and second memory alloy rods and prevent them from being subjected to pressure.

[0015] Specifically, the sleeve is provided with a clearance hole, which is used to connect the third shape memory alloy rod to the first shape memory alloy rod or the second shape memory alloy rod.

[0016] Furthermore, the displacement amplification system includes multiple pulley groups distributed circumferentially along the first rod. Each pulley group includes a first steel cable, a second steel cable, a bracket, a movable pulley, and a fixed pulley fixedly mounted on the inner wall of the support cylinder. One end of the bracket is fixedly connected to the inner wall of the support cylinder, and the other end is provided with a ring. A connecting rod is provided radially on the outer side of the movable pulley. One end of the first steel cable is fixedly connected to one end of the connecting rod, and the other end passes through the ring and is fixedly connected to the outer wall of the first rod. One end of the second steel cable is fixedly connected to the other end of the connecting rod, and the other end passes sequentially around the fixed pulley and the movable pulley before being fixedly connected to the end of the outer sleeve away from the first spring.

[0017] Furthermore, a baffle is provided in the viscous liquid chamber along the circumference of the outer sleeve, the baffle dividing the viscous liquid chamber into two sub-chambers, and the baffle is provided with a plurality of frustum-shaped damping holes, the larger end of the damping hole being close to the first spring.

[0018] Furthermore, the first rod and the second rod are connected by a second spring, one end of the second spring is fixedly connected to the inner wall of the second rod, and the other end is fixedly connected to the end of the first rod that passes through the inside of the second rod.

[0019] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: 1. This invention utilizes shape memory alloy rods made of SMA material, with sleeves binding the first and second shape memory alloy rods. This ensures that under any working condition, one of the two main shape memory alloy rods is always in a purely tensile state, while the other is protected from compression, fully leveraging the excellent tensile fatigue resistance and superelastic potential of SMA material. Simultaneously, the first spring connected to the outer sleeve is also made of shape memory alloy, where the spring is only subjected to tension, cleverly utilizing the shape memory alloy's properties to enhance the device's recovery capability. This decouples the energy dissipation and recovery processes: it can dissipate energy during large deformations and autonomously return to its original shape after the load disappears, greatly improving the structure's recoverability and seismic toughness.

[0020] 2. The present invention uses the radial component force generated by the tension of the shape memory alloy rod to compress the friction ring, so that the clamping force on the central rod automatically and continuously increases with the increase of the external load, thereby improving the applicability of the device.

[0021] 3. This invention utilizes the asymmetric geometry of the frustum-shaped holes on the baffle to create different flow resistances in the forward and reverse directions. During the energy consumption phase, the liquid flows from the small end to the large end, causing the flow channel to contract and resulting in severe throttling and frictional energy dissipation. During the reset phase, the liquid flows from the large end to the small end, the flow channel becomes relatively smooth, and the resistance is significantly reduced.

[0022] 4. This invention integrates three classic and efficient energy dissipation pathways: friction, fluid damping, and shape memory alloy superelasticity. During the dynamic response process, these three mechanisms are activated sequentially or simultaneously based on the phase difference between displacement and velocity, achieving a multi-stage energy dissipation effect.

[0023] 5. This invention uses a combination of fixed and movable pulleys. Through the transmission and superposition of the pulley system, the movable pulley is used in reverse to reduce the distance, thereby amplifying the displacement, enhancing the energy dissipation capacity, and solving the problem of insufficient response to small excitations. Attached Figure Description

[0024] The accompanying drawings are incorporated in and form part of this specification, and together with the description serve to explain the principles of the invention.

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the displacement amplification system connection of a composite self-resetting energy-dissipating support device provided by the present invention; Figure 2 A schematic diagram of the shape memory alloy energy dissipation system connection for a composite self-resetting energy dissipation support device provided by the present invention; Figure 3 A schematic diagram of the shape memory alloy energy dissipation system of a composite self-resetting energy dissipation support device provided by the present invention; Figure 4 This is a schematic diagram of the sliding component structure of a composite self-resetting energy-dissipating support device provided by the present invention.

[0027] Wherein: 1 is the first rod; 2 is the second rod; 3 is the support cylinder; 4 is the sleeve; 5-1 is the first steel cable; 5-2 is the second steel cable; 6 is the outer sleeve; 6-1 is the baffle; 7 is the friction ring; 8 is the bolt; 9 is the second spring; 10 is the first spring; 11 is the viscous liquid chamber; 12 is the bracket; 13 is the connector; 14 is the first shape memory alloy rod; 15 is the second shape memory alloy rod; 16 is the third shape memory alloy rod; 17 is the first slide groove; 18 is the second slide groove; 19 is the sliding assembly; 19-1 is the sliding rod; 19-2 is the sliding base; 20 is the movable pulley; 21 is the fixed pulley. Detailed Implementation

[0028] Exemplary embodiments will now be described in detail. The embodiments described below are not representative of all embodiments consistent with this invention. Rather, they are merely examples consistent with some aspects of the invention as detailed in the appended claims.

[0029] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] Example 1 like Figures 1-4 As shown, this embodiment provides a composite self-resetting energy-dissipating support device, including a support cylinder 3 and a first rod 1 and a second rod 2 disposed therein. One end of the second rod 2 is sleeved on one end of the first rod 1 and the two can slide relative to each other. The other end of the second rod 2 is fixedly connected to the inner wall of one end of the support cylinder 3, and the other end of the first rod 1 extends to the outer side of the other end of the support cylinder 3. An outer sleeve 6 is sleeved on the end of the second rod 2 away from the first rod 1. One end of the outer sleeve 6 is connected to the inner wall of the support cylinder 3 through a first spring 10, and the other end is connected to one end of a displacement amplification system. The other end of the displacement amplification system is connected to the first rod 1. A viscous liquid chamber 11 for energy dissipation through fluid damping is provided between the outer wall of the outer sleeve 6 and the inner wall of the support cylinder 3. A shape memory alloy energy dissipation system is provided on the outer side of the overlapping part of the first rod 1 and the second rod 2.

[0031] In another part, the first rod 1 extends to one end outside the support cylinder 3 and is provided with a connector 13. Another connector 13 is provided on the outer side wall of the support cylinder 3 away from the connector 13. Both connectors 13 are used to connect with the external building structure.

[0032] In a preferred embodiment of this invention, the central axes of the support cylinder 3, the first rod 1, and the second rod 2 are located on the same straight line.

[0033] Specifically, the first spring 10 is made of shape memory alloy.

[0034] Specifically, the viscous liquid chamber 11 is filled with a viscous liquid, which may be dimethyl silicone oil or methylphenyl silicone oil.

[0035] Specifically, the outer sleeve 6 is provided with sealing rings at both the front and rear points of the viscous liquid chamber 11 to ensure the chamber's airtightness.

[0036] Furthermore, such as Figure 1As shown, the shape memory alloy energy dissipation system includes a friction ring 7 sleeved on the outside of the second rod 2 and multiple sets of alloy rod energy dissipation units distributed circumferentially along the friction ring 7. The alloy rod energy dissipation units are made of shape memory alloy. The side wall of the second rod 2 is provided with a first sliding groove 17 along the length direction. The inner wall of the friction ring 7 is provided with a bolt 8, which passes through the first sliding groove 17 and is fixedly connected to the first rod 1.

[0037] Furthermore, such as Figure 3 As shown, the alloy rod energy dissipation unit includes a first memory alloy rod 14 and a second memory alloy rod 15. One end of the first memory alloy rod 14 and the second memory alloy rod 15 on the same side are hinged to the outer wall of the friction ring 7, and the other end on the same side is slidably connected to the inner wall of the support cylinder 3 through the sliding assembly 19, so that the first memory alloy rod 14 and the second memory alloy rod 15 have a V-shaped opening structure.

[0038] Specifically, the line connecting the two ends of the V-shaped opening is parallel to the axis of the first rod 1.

[0039] Furthermore, such as Figure 4 As shown, the sliding assembly 19 includes a sliding rod 19-1 and a sliding base 19-2 fixed to the inner wall of the support cylinder 3. The sliding base 19-2 is provided with a second sliding groove 18 for the sliding rod 19-1 to move horizontally. One end of the sliding rod 19-1 is hinged to a first memory alloy rod 14 or a second memory alloy rod 15, and the other end is provided with a limiting block to prevent the sliding rod 19-1 from falling out of the second sliding groove 18.

[0040] Specifically, the length direction of the second groove 18 is consistent with the axial direction of the first rod 1.

[0041] Furthermore, the alloy rod energy dissipation unit also includes a third memory alloy rod 16 connected between the first memory alloy rod 14 and the second memory alloy rod 15.

[0042] Furthermore, a sleeve 4 is provided on the outer side of the first memory alloy rod 14 and the second memory alloy rod 15. The sleeve 4 is used to support the first memory alloy rod 14 and the second memory alloy rod 15 to prevent them from being subjected to pressure.

[0043] Specifically, the sleeve 4 is provided with a clearance hole, which is used for the third shape memory alloy rod 16 to connect with the first shape memory alloy rod 14 or the second shape memory alloy rod 15.

[0044] Furthermore, such as Figure 2As shown, the displacement amplification system includes multiple pulley groups distributed circumferentially along the first rod 1. Each pulley group includes a first steel cable 5-1, a second steel cable 5-2, a bracket 12, a movable pulley 20, and a fixed pulley 21 fixedly installed on the inner wall of the support cylinder 3. One end of the bracket 12 is fixedly connected to the inner wall of the support cylinder 3, and the other end is provided with a ring. A connecting rod is provided radially on the outer side of the movable pulley 20. One end of the first steel cable 5-1 is fixedly connected to one end of the connecting rod, and the other end passes through the ring and is fixedly connected to the outer wall of the first rod 1. One end of the second steel cable 5-2 is fixedly connected to the other end of the connecting rod, and the other end passes through the fixed pulley 21 and the movable pulley 20 in sequence and is fixedly connected to the end of the outer sleeve 6 away from the first spring 10.

[0045] Preferably, multiple sets of gold rod energy dissipation units and multiple sets of pulley groups are evenly spaced and distributed around the first rod 1.

[0046] In one embodiment of this invention, there are two sets of alloy rod energy dissipation units and two sets of pulley groups. The two sets of alloy rod energy dissipation units are symmetrically arranged about the first rod 1, and the two sets of pulley groups are symmetrically arranged about the first rod 1. The planes of the two sets of alloy rod energy dissipation units are perpendicular to the planes of the two sets of pulley groups.

[0047] Furthermore, a baffle 6-1 is provided inside the viscous liquid chamber 11 along the circumference of the outer sleeve 6. The baffle 6-1 divides the viscous liquid chamber 11 into two sub-chambers. Multiple frustum-shaped damping holes are opened on the baffle 6-1. The multiple damping holes are evenly distributed on the baffle 6-1. The end with the larger opening of the damping hole is close to the first spring 10.

[0048] The principle of this embodiment is as follows: When the first rod 1 is subjected to axial tension in this embodiment, it moves axially outward (to the right) from the support cylinder 3, causing the friction plate 7 to move outward synchronously. This causes the two shape memory alloy rods connected to the friction ring 7 to deform: the second shape memory alloy rod 15 is stretched, and the first shape memory alloy rod 14 is compressed. However, since the first shape memory alloy rod 14 is covered by a sleeve 4, its compression is prevented and it remains in its original shape, with only its end sliding along the groove 18; at the same time, the third shape memory alloy rod 16 is stretched. At this time, the second shape memory alloy rod 15 not only generates a reaction force along the axial direction of the first rod 1, but also generates an outward pulling force, forcing the friction ring 7 to deform and destroy its circular structure, thereby increasing the pressure on the other side, pressing the second rod 2 tightly, and generating frictional energy dissipation. As the external force increases, the friction intensifies, and the energy dissipation capacity increases simultaneously. At the same time, the movement of the first rod 1 pulls the outer sleeve 6 through the first steel cable 5-1 and the second steel cable 5-2, stretching the first spring 10, causing the baffle 6-1 to move away from the first spring 10 in the viscous liquid chamber 11. Under the action of the movable pulley in the displacement amplification system, the movement distance of the baffle 6-1 increases, further increasing energy consumption. The viscous liquid is forced to flow through the frustum-shaped damping orifice on the baffle 6-1 under pressure, generating severe fluid friction and throttling losses, converting mechanical energy into heat energy, thus achieving efficient energy consumption. When the external force is removed, each part of the device automatically resets under the action of the restoring force: the second shape memory alloy rod 15 and the third shape memory alloy rod 16 return to their original shape due to their superelastic properties, simultaneously pulling the first shape memory alloy rod 14 back along the slide groove 18 and driving the first rod 1 back to its initial position; the first spring 10 pushes the outer sleeve 6 back to its initial position. Thanks to the asymmetrical design of the frustum-shaped damping orifice, the resistance is small when the fluid flows in the reset direction, thus effectively shortening the reset time.

[0049] When axially compressed in this embodiment, the first rod 1 moves axially into the support cylinder 3 (moves to the left), causing the friction plate 7 to move inward synchronously, thereby deforming the two shape memory alloy rods connected to the friction ring 7: the first shape memory alloy rod 14 is stretched, and the second shape memory alloy rod 15 is compressed. However, since the second shape memory alloy rod 15 is covered by the sleeve 4, its compression is prevented and it remains in its original shape, with only its end sliding along the groove 18; at the same time, the third shape memory alloy rod 16 is stretched. At this time, the first shape memory alloy rod 14 not only generates a reaction force along the axial direction of the first rod 1, but also generates an outward pulling force, forcing the friction ring 7 to deform, destroying its circular structure, thereby increasing the pressure on the other side, pressing the second rod 2 tightly, and generating frictional energy dissipation. As the external force increases, the friction intensifies, and the energy dissipation capacity increases synchronously. At the same time, the movement of the first rod 1 pulls the outer sleeve 6 through the first steel cable 5-1 and the second steel cable 5-2, stretching the first spring 10, causing the baffle 6-1 to move away from the first spring 10 in the viscous liquid chamber 11. Under the action of the movable pulley in the displacement amplification system, the movement distance of the baffle 6-1 increases, further increasing energy consumption. The viscous liquid is forced to flow through the frustum-shaped damping orifice on the baffle 6-1 under pressure, generating severe fluid friction and throttling losses, converting mechanical energy into heat energy, thus achieving efficient energy consumption. When the external force is removed, each part of the device automatically resets under the action of the restoring force: the first shape memory alloy rod 14 and the third shape memory alloy rod 16 return to their original shape due to their superelastic properties, simultaneously pulling the second shape memory alloy rod 15 back along the slide groove 18 and driving the first rod 1 back to its initial position; the first spring 10 pushes the outer sleeve 6 back to its original position. Thanks to the asymmetrical design of the frustum-shaped damping orifice, the resistance is small when the fluid flows in the reset direction, thus effectively shortening the reset time.

[0050] Example 2 Based on Embodiment 1, this embodiment provides a composite self-resetting energy-dissipating support device. The first rod 1 and the second rod 2 are connected by a second spring 9. One end of the second spring 9 is fixedly connected to the inner wall of the second rod 2, and the other end is fixedly connected to the end of the first rod 1 that passes through the second rod 2. When the external force is removed, the second spring 9 releases its elastic potential energy, pushing or pulling the first rod 1, and working in conjunction with the alloy rod energy-dissipating unit to restore the first rod 1 to its initial position.

[0051] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention.

[0052] It should be understood that the present invention is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A composite self-resetting energy-dissipating support device, characterized in that, It includes a support cylinder (3) and a first rod (1) and a second rod (2) disposed therein. One end of the second rod (2) is sleeved on one end of the first rod (1) and the two can slide relative to each other. The other end of the second rod (2) is fixedly connected to the inner wall of one end of the support cylinder (3). The other end of the first rod (1) extends to the outside of the other end of the support cylinder (3). The second rod (2) is fitted with an outer sleeve (6) at one end away from the first rod (1). One end of the outer sleeve (6) is connected to the inner wall of the support cylinder (3) through the first spring (10), and the other end is connected to one end of the displacement amplification system. The other end of the displacement amplification system is connected to the first rod (1). A viscous liquid chamber (11) for energy dissipation through fluid damping is provided between the outer wall of the outer sleeve (6) and the inner wall of the support cylinder (3). A shape memory alloy energy dissipation system is provided on the outer side of the overlapping part of the first rod (1) and the second rod (2).

2. The composite self-resetting energy-dissipating support device according to claim 1, characterized in that, The shape memory alloy energy dissipation system includes a friction ring (7) sleeved on the outside of the second rod (2) and multiple sets of alloy rod energy dissipation units distributed circumferentially along the friction ring (7). The alloy rod energy dissipation units are made of shape memory alloy. The side wall of the second rod (2) is provided with a first sliding groove (17) along the length direction. The inner wall of the friction ring (7) is provided with a bolt (8). The bolt (8) passes through the first sliding groove (17) and is fixedly connected to the first rod (1).

3. The composite self-resetting energy-dissipating support device according to claim 2, characterized in that, The alloy rod energy dissipation unit includes a first memory alloy rod (14) and a second memory alloy rod (15). One end of the first memory alloy rod (14) and the second memory alloy rod (15) are hinged to the outer wall of the friction ring (7), and the other end of the same side is slidably connected to the inner wall of the support cylinder (3) through the sliding assembly (19), so that the first memory alloy rod (14) and the second memory alloy rod (15) are V-shaped.

4. The composite self-resetting energy-dissipating support device according to claim 3, characterized in that, The sliding assembly (19) includes a sliding rod (19-1) and a sliding base (19-2) fixed to the inner wall of the support cylinder (3). The sliding base (19-2) is provided with a second sliding groove (18) for the sliding rod (19-1) to move horizontally. One end of the sliding rod (19-1) is hinged to a first memory alloy rod (14) or a second memory alloy rod (15), and the other end is provided with a limiting block to prevent the sliding rod (19-1) from falling out of the second sliding groove (18).

5. The composite self-resetting energy-dissipating support device according to claim 3, characterized in that, The alloy rod energy dissipation unit also includes a third memory alloy rod (16) connected between the first memory alloy rod (14) and the second memory alloy rod (15).

6. The composite self-resetting energy-dissipating support device according to claim 3, characterized in that, The first memory alloy rod (14) and the second memory alloy rod (15) are fitted with a sleeve (4).

7. The composite self-resetting energy-dissipating support device according to claim 1, characterized in that, The displacement amplification system includes multiple pulley groups distributed circumferentially along the first rod (1). The pulley group includes a first steel cable (5-1), a second steel cable (5-2), a bracket (12), a movable pulley (20), and a fixed pulley (21) fixedly installed on the inner wall of the support cylinder (3). One end of the bracket (12) is fixedly connected to the inner wall of the support cylinder (3), and the other end is provided with a ring. A connecting rod is provided radially on the outer side of the movable pulley (20). One end of the first steel cable (5-1) is fixedly connected to one end of the connecting rod, and the other end passes through the ring and is fixedly connected to the outer wall of the first rod (1). One end of the second steel cable (5-2) is fixedly connected to the other end of the connecting rod, and the other end passes around the fixed pulley (21) and the movable pulley (20) in sequence and is fixedly connected to the end of the outer sleeve (6) away from the first spring (10).

8. The composite self-resetting energy-dissipating support device according to claim 1, characterized in that, A baffle (6-1) is provided inside the viscous liquid chamber (11) along the circumference of the outer sleeve (6). The baffle (6-1) divides the viscous liquid chamber (11) into two sub-chambers. Multiple frustum-shaped damping holes are provided on the baffle (6-1). The larger end of the damping hole is close to the first spring (10).

9. A composite self-resetting energy-dissipating support device according to claim 1, characterized in that, The first rod (1) and the second rod (2) are connected by a second spring (9). One end of the second spring (9) is fixedly connected to the inner wall of the second rod (2), and the other end is fixedly connected to the end of the first rod (1) that passes through the inside of the second rod (2).

10. A composite self-resetting energy-dissipating support device according to claim 1, characterized in that, The first spring (10) is made of shape memory alloy.

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