A self-resetting viscoelastic composite damper with parallel SMA wire rope

Abstract

The present invention relates to a self-resetting viscoelastic composite damper of parallel SMA wire rope, comprising an inner cylinder, a middle cylinder, an outer cylinder, an SMA cable, a baffle, a damping rod and a damping block. The inner end of the damping rod is provided with a damping head, and the outer end thereof is provided with a connecting head; the damping head comprises a fixing block, a damping block, a left pressure plate and a right pressure plate, the fixing block is fixed on the damping rod at intervals, and the left pressure plate, the damping block and the right pressure plate are sequentially sleeved on the damping rod from left to right; the left side of the outer cylinder is provided with an external fixing groove, The left tail plate and the right tail plate are evenly distributed axially on the outer sides of the two right damping rods. The left tail plate is sleeved in the sliding hole and fixed in the outer fixing groove, and the right tail plate is fixed in the middle fixing groove. Circular holes are arranged on the baffles on both sides, and the SMA cables are sleeved in the circular holes. The support structure is provided with a reset force by the SMA cables and high-damping rubber, and has a strong self-reset ability. Under tension and compression, the SMA cables and the damping blocks both participate in resisting the force, and the two are connected in parallel to resist the load.

Description

Technical Field

[0001] The invention relates to the technical field of self-resetting anti-buckling support systems, and in particular to a self-resetting viscoelastic composite damper of parallel SMA wire ropes. Background Art

[0002] Self-resetting buckling-resistance braces are generally composed of a support body, a prestressing system, an energy dissipation system, and auxiliary devices. Currently, common energy dissipation devices include friction energy dissipation, metal yielding, and magnetorheological fluids, and reset devices include prestressed SMA rods and wires, disc springs, and various high-performance fiber tendons.

[0003] At present, the shortcomings of various self-resetting anti-buckling supports include: insufficient support stiffness, too low axial elongation, immature anchoring technology of high-performance fiber bars, weak energy dissipation capacity and excessive prestress. According to the existing experience of the application of self-resetting anti-buckling supports in engineering, it can be seen that: ① If the stiffness of the support is not enough, it cannot provide sufficient lateral stiffness for the structure during a large earthquake or a rare earthquake. ② Low axial elongation will lead to a small deformation of the support and thus failure due to damage. ③ The slip of the anchoring end of the self-resetting support using high-performance fiber bars will cause prestress loss and thus affect the reset capacity. The material is brittle and there is a risk of sudden fracture when the load exceeds the design value. ④ Excessive prestress will lead to a decrease in the elongation of the system, which is not conducive to the energy dissipation and reset capacity of the support. Based on this, it is necessary to study a self-resetting viscoelastic composite damper with parallel SMA wire rope. Summary of the invention

[0004] In order to overcome the above problems existing in the common ordinary steel supports and steel core buckling-resistance supports, the present invention proposes a self-resetting energy dissipation buckling-resistance support (SMA+viscoelastic material) based on SMA wire rope and viscoelastic material. The device uses high damping rubber material (energy dissipation, reset) and SMA cable (energy dissipation, reset), and uses high damping rubber and SMA cable to dissipate energy together, and can increase elongation and reset capacity; since the compressed volume of the rubber material remains unchanged, the axial displacement of the support can be well controlled. Due to the presence of high damping rubber, the building structure can dissipate energy even for small lateral displacements caused by wind or small earthquakes. By proposing a new type of support, it is expected to provide better measures for the earthquake resistance of frame structures.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a self-resetting viscoelastic composite damper of parallel SMA wire rope, comprising an inner cylinder, a middle cylinder, an outer cylinder, an SMA cable, a baffle, a damping rod, a damping block, a left pressure plate, a right pressure plate, a left tail plate and a right tail plate, the inner cylinder is provided with four layers of partitions, and the inner cavity of the inner cylinder is divided into a left first cavity, a left second cavity, a central cavity, a right second cavity and a right first cavity from left to right; a damping head is provided at the inner end of the damping rod, and a connecting head is provided at the outer end thereof; the damping head comprises a fixing block, a damping block, a left pressure plate and a right pressure plate, the fixing blocks are fixed on the damping rod at intervals, and the left pressure plate, the damping block and the right pressure plate are sequentially mounted on the damping rod from left to right and are located between the two fixing blocks; in the left second cavity The left and right two cavities are respectively provided with damping heads, and the middle part of each partition is provided with a central hole for allowing the fixing block to pass and blocking the pressure plate; the left and right sides of the middle cylinder are respectively provided with a sliding hole and a middle fixing groove, and the left side of the outer cylinder is provided with an outer fixing groove, the middle cylinder is matched and sleeved on the outside of the inner cylinder, and the outer cylinder is sleeved on the outside of the middle cylinder at intervals, and the left and right damping rods are respectively axially evenly provided with a left tail plate and a right tail plate on the outside, and the left tail plate is longer than the right tail plate, wherein the left tail plate is sleeved in the sliding hole and fixed in the outer fixing groove, and the right tail plate is fixed in the middle fixing groove, the baffle is sleeved on the two damping rods and is located between the tail plate and the connector, and circular holes are provided on the baffles on both sides, the SMA cable is sleeved in the circular hole, and a limiting block is provided at the end of the SMA cable.

[0006] Furthermore, the damping blocks are made of high-damping rubber, and the damping blocks are spaced apart and sleeved in the left two cavities and the right two cavities.

[0007] Furthermore, the left pressure plate and the right pressure plate are matched and sleeved in the left two cavities and the right two cavities, and can slide along the left two cavities and the right two cavities.

[0008] Furthermore, the left tail plate and the right tail plate array are distributed on the outside of the damping rod, and the two tail plates are correspondingly provided with a plurality of them, and the ends of the two tail plates are matched and fixedly sleeved in the outer fixing groove and the middle fixing groove respectively.

[0009] Further, the SMA cable is located in the cavity between the middle tube and the outer tube, and the SMA cable is staggered with the left tail plate and the right tail plate.

[0010] Furthermore, the inner tube includes a central body, a left connecting body and a right connecting body, wherein two layers of partitions are arranged in the central body at intervals and internal threads are arranged at both ends thereof, wherein a layer of partitions is arranged in the left connecting body and the right connecting body and external threads are arranged at the connecting ends thereof, and the left connecting body and the right connecting body are correspondingly threadedly connected to the left and right sides of the central body.

[0011] Furthermore, a pressure buffer block is arranged on the outer fixed block, and the pressure buffer blocks on both sides correspond to each other in the central cavity.

[0012] Furthermore, tension buffer blocks corresponding to the fixing blocks are arranged in the left cavity and the right cavity of the inner tube.

[0013] Furthermore, the middle fixing groove and the outer fixing groove are T-shaped groove structures.

[0014] Furthermore, the inner cylinder, the middle cylinder and the outer cylinder are all cylindrical structures made of carbon steel.

[0015] The beneficial effect of the above technical solution is: the present invention is a new form of self-resetting support, which is provided with a three-layer set structure of an inner tube, a middle tube and an outer tube, and the damping head is arranged in the inner tube. In the specific structure, the middle part of the damping head is a damping block, and the two sides are pressure plates for compressing the damping block. The outer side of the pressure plate is a fixed block, that is, the fixed block can move with the damping rod, and drive the pressure plates on both sides accordingly under tension and compression states, so that the damping block between the two pressure plates is compressed. At the same time, under the action of two loads, the SMA cable is in a tension state, and then the high damping rubber material and the SMA cable are used to dissipate energy by parallel force to resist the tensile load.

[0016] In the structure of the present invention, the damping rod is connected to the inner cylinder by a damping head, and a left tail plate and a right tail plate are fixed to the left and right sides of the damping rod respectively, wherein the left tail plate is fixedly connected to the outer cylinder, and the right tail plate is fixedly connected to the middle cylinder. In the initial state, the left tail plate and the right tail plate are stretched outwards, and this state is maintained by the tensioning force of the SMA cable; in the tension state, the damping rod receives the outward pulling force, and the two sides of the pressure plate at its inner end compress the damping block, and at the same time, the tail plate resting on the baffle pushes the baffle outwards to expand the distance between the two baffles, thereby allowing the SMA cable to participate in resisting the load; in the compression state, the damping rod compresses the damping block inwards, and at the same time, the left tail plate slides along the sliding hole of the middle cylinder and drives the outer cylinder to move, and the right tail plate drives the middle cylinder to move, and causes the middle cylinder and the outer cylinder to slide relatively, so that the SMA cable is stretched to participate in energy consumption to resist the compression load.

[0017] The support force transmission device of the present invention has a novel structure, and can well make the SMA subjected to tensile stress under tension and compression conditions, and can achieve a sufficient controllable elongation. Due to the performance of the high-damping rubber in constant volume under pressure and the closed space in which it is located, the displacement is controllable, and the support structure is provided with a reset force by the SMA cable and the high-damping rubber, and has a strong self-reset ability. Under tension and compression, the SMA cable and the damping block both participate in resisting the force, and the two resist the load in parallel. Since the rubber material has a constant volume under pressure, the axial displacement of the support can be well controlled. Even if the building structure has a small lateral displacement caused by wind or a small earthquake, it can dissipate energy, providing a better shock-absorbing and damping device for the earthquake resistance of the frame structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a structural schematic diagram of the present invention;

[0019] Figure 2 for Figure 1 The main view;

[0020] Figure 3 for Figure 1 Side view of

[0021] Figure 4 for Figure 3 Sectional view along AA direction;

[0022] Figure 5 It is a structural schematic diagram of the middle tube;

[0023] Figure 6 for Figure 5 The main view;

[0024] Figure 7 for Figure 6 Schematic diagram of the internal structure;

[0025] Figure 8 Schematic diagram of the internal structure of the inner cylinder;

[0026] Fig. 9 for Figure 8 The main view;

[0027] Fig.10 for Fig. 9 Schematic diagram of the internal structure;

[0028] Fig.11 An exploded view of the present invention;

[0029] Fig.12 It is a schematic diagram of the three state structures of the present invention;

[0030] Fig.13 It is another structural schematic diagram of the inner tube;

[0031] Fig.14 It is a structural schematic diagram of a tension buffer block and a compression buffer block;

[0032] Fig.15 This is the performance test diagram of high damping rubber;

[0033] Fig.16 Schematic diagram of the coordination structure of the middle buffer body and the side buffer body.

[0034] Figure numerals: 1 is an outer cylinder, 101 is an outer fixing groove, 2 is a middle cylinder, 201 is a sliding hole, 202 is a middle fixing groove, 3 is an inner cylinder, 31 is a central body, 32 is a left connecting body, 33 is a right connecting body, 34 is a first half body, 35 is a second half body, 301 is a left first cavity, 302 is a left second cavity, 303 is a central cavity, 304 is a right second cavity, 305 is a right first cavity, 306 is a partition, 307 is a central hole, 4 is a damping rod, 5 is a connector, 6 is a damping block, 7 is a fixing block, 8 is a left pressure plate, 9 is a right pressure plate, 10 is a left tail plate, 11 is a right tail plate, 12 is a baffle, 13 is a limit block, 14 is an SMA cable, 15 is a pressure buffer block, 16 is a pressure buffer block, 17 is a middle buffer body, and 18 is a side buffer body. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0036] Example 1. This example aims to provide a self-resetting viscoelastic composite damper with a parallel SMA wire rope. In order to overcome the problem of poor load resistance of the currently common ordinary steel supports and steel core anti-buckling supports, this example proposes a self-resetting energy dissipation anti-buckling support (SMA+viscoelastic material) based on SMA wire rope and viscoelastic material.

[0037] A self-resetting viscoelastic composite damper of parallel SMA wire ropes comprises an inner cylinder 3, a middle cylinder 2, an outer cylinder 1, an SMA cable 14, a baffle 12, a damping rod 4, a pressure plate and a tail plate. The damping structure in this embodiment breaks the structural form of the traditional support, and uses two damping rods to compress high-damping rubber, and uses the force of the middle cylinder 2 and the outer cylinder 1 on the SMA cable to bear the axial force, so that the two groups of high-damping rubbers can be jointly applied with force, which is beneficial to the energy consumption of the support, and the support is reset by the joint action of the restoring force of the high-damping rubber and the restoring force of the SMA cable.

[0038] In the specific structure, the inner cylinder 3, the middle cylinder 2 and the outer cylinder 1 are all cylindrical structures made of carbon steel, which play a supporting role, can prevent the inner core component (damping head) from buckling under the action of axial pressure (note that "buckling" is different from "yielding"), and can help realize the tension of the SMA cable; in this embodiment, four layers of partitions 306 are arranged inside the inner cylinder 3, and the internal cavity of the inner cylinder 3 is divided into a left first cavity 301, a left second cavity 302, a central cavity 303, a right second cavity 304 and a right first cavity 305 from left to right; A damping head is provided at the inner end of the damping rod 4, and a connecting head 5 is provided at the outer end thereof; the damping head comprises a fixed block 7, a damping block 6, a left pressure plate 8 and a right pressure plate 9, wherein the fixed block 7 is fixed on the damping rod 4 at intervals, and the left pressure plate 8, the damping block 6 and the right pressure plate 9 are sequentially mounted on the damping rod 4 from left to right, and are located between the two fixed blocks 7; when working, the fixed block 7 moves integrally with the damping rod 4, and the damping block 6, the left pressure plate 8 and the right pressure plate 9 are slidably mounted on the given position of the damping rod 4, and the pressure plates on both sides are used to compress the damping block.

[0039] In this embodiment, damping heads are respectively installed in the left second chamber 302 and the right second chamber 304, that is, the assembled damping heads are respectively placed in the left second chamber 302 and the right second chamber 304, and the middle part of each partition 306 is provided with a central hole 307 for allowing the fixing block to pass through and blocking the pressure plate. In order to facilitate the installation of the damping head, the inner cylinder in this embodiment includes a central body 31, a left connecting body 32 and a right connecting body 33. Two layers of partitions are arranged in the central body 31 at intervals, and internal threads are arranged at both ends thereof. A layer of partition is arranged in the left connecting body and the right connecting body, and external threads are arranged at the connecting end thereof. The left connecting body and the right connecting body are correspondingly threadedly connected to the left and right sides of the central body. The damping head is placed in the inner cylinder when it is in a disassembled state, and then assembled. During implementation, the threaded connection here can also be welded, bonded, or butt-fixed, which will not be described one by one in this embodiment.

[0040] In this embodiment, the inner cylinder structure may also include a first half body 34 and a second half body 35, which are buckled together and fixed. The specific fixing method may be welding or butt fixing. The damping head is installed in one of the half bodies and then fixed by welding.

[0041] In a specific implementation, the damping block is a high-damping rubber, and the damping block is spaced apart and mounted in the left second cavity 302 and the right second cavity 304. At this time, there is a gap between the damping block and the left second cavity 302 and the right second cavity 304 to facilitate the displacement of the damping block. The high-damping rubber has good energy dissipation capacity and restoring force. After being compressed, it consumes a certain amount of seismic energy and helps the support to return to its original state. Its compressed volume remains unchanged, and the overall displacement of the support can be effectively controlled. Its hysteresis performance and structure are as follows: Fig.15 Displayed in.

[0042] The left and right sides of the middle cylinder 2 are respectively provided with a sliding hole 201 and a middle fixing groove 202, and the outer side of the outer cylinder 1 is provided with an outer fixing groove 101. The middle cylinder 2 is matched and sleeved on the outer side of the inner cylinder 3, and the outer cylinder 1 is sleeved on the outside of the middle cylinder 2 at intervals. The left and right damping rods are respectively arranged with a left tail plate 10 and a right tail plate 11 evenly distributed along the axial direction on the outer side, and the left tail plate 10 is longer than the right tail plate 11, wherein the left tail plate 11 is sleeved in the sliding hole 201 and fixed in the outer fixing groove 101, and the right tail plate 11 is fixed in the middle fixing groove 101. In the groove 202, during implementation, the left tail plate 11 and the right tail plate 10 are distributed in an array on the outside of the damping rod, and the two tail plates are correspondingly provided with multiple, specifically 3, and the ends of the two tail plates are respectively matched and fixedly sleeved in the outer fixing groove 101 and the middle fixing groove 202. The middle fixing groove 202 and the outer fixing groove 101 are T-shaped groove structures, and the tail plates are matched and nested therein. In this embodiment, the tail plate structure drives the baffle to compress the high damping rubber during the tension and compression process of the support, which mainly plays a role in transmitting force.

[0043] Structurally, the middle tube 2 is grooved on both sides, the middle fixed groove 202 on one side has a depth of 100 mm and is used to connect with the right tail plate, the sliding hole 201 on the other side is an open structure with a depth of 300 mm and is used to cooperate with the left tail plate 10, the outer fixed groove on the outer tube has a depth of 100 mm, in this embodiment, the left tail plate is fixed on the damping rod on the left side, the left tail plate passes through the sliding hole and is fixed in the outer fixed groove, the right tail plate is fixed on the damping rod on the right side, and the right tail plate is directly fixed in the middle fixed groove, and the specific fixing method can be welding, bonding and other structures.

[0044] The baffle 12 is sleeved on the two damping rods and is located between the tail plate and the connector. Circular holes are provided on the baffles on both sides. The SMA cable is sleeved in the circular holes. A limiting block 13 is provided at the end of the SMA cable 14. The SMA cable 14 is limited by the limiting block 13. When the distance between the two baffles increases, the baffle transfers the load to the limiting block 13, thereby stretching the SMA cable 14. In this embodiment, the baffle 14 is a circular structure with a hole in the middle, and is sleeved on the damping rod 4. The SMA cable 14 is obtained by processing a thin diameter SMA wire. The SMA cable is clamped on the discs at both ends through an anchor clamp and prestressed. During implementation, the SMA cable is in the cavity between the middle cylinder and the outer cylinder, and the SMA cable is staggered with the left tail plate and the right tail plate.

[0045] When this embodiment is working, when the support is subjected to axial tension, the damping rods on both sides are pulled to drive the fixed block to squeeze the pressure plate and the damping block, the middle cylinder follows the right damping rod to act on the right end disc baffle, and the outer cylinder follows the left damping rod to act on the left end disc baffle, so that the SMA cable is subjected to tensile stress.

[0046] When the support is subjected to axial compressive stress, the damping rod drives the fixed block to extrude the pressure plate and the damping block in the opposite direction. The middle tube can follow the right damping rod inward and act on the left end disc baffle through the sliding hole thereon. The outer tube follows the left damping rod and acts inward on the right end disc, thereby stretching the SMA cable. When the support is subjected to tension and compression, the SMA cable is pulled. High-damping rubber material (energy dissipation, reset) and SMA cable (energy dissipation, reset) are used. High-damping rubber and SMA cable are used to dissipate energy together, and the elongation and reset ability can be increased. Since the compressed volume of the rubber material remains unchanged, the axial displacement of the support can be well controlled. Due to the existence of high-damping rubber, the building structure can dissipate energy even if it is a small lateral displacement caused by wind or a small earthquake. By proposing a new type of support, it is hoped that better measures will be provided for the earthquake resistance of frame structures.

[0047] Embodiment 2: This embodiment further illustrates the internal structure of the inner cylinder.

[0048] In order to further increase the load resistance capacity of the damper, a pressure buffer block 15 is provided on the outer fixed block in this embodiment, and the secondary pressure buffer block 15 is substantially the same size as the fixed block. After being subjected to the compressive force, the damping rod 4 moves into the central cavity, the left and right fixed blocks approach each other, and the pressure buffer blocks on both sides are docked. At this time, it is in a relatively large pressure state. In this state, not only the damping block and the SMA cable participate in resisting the load, but the secondary buffer block also participates in resisting the load, thereby further improving the resistance capacity under the pressure state.

[0049] Furthermore, tension buffer blocks 16 are provided in the left and right cavities of the inner tube. Under tension, the damping rod 4 drives the fixed block to move into the left and right cavities, and after moving to a certain displacement, the fixed block contacts the tension buffer block 16. At this time, not only the damping block and the SMA cable participate in resisting the load, but the tension buffer block 16 also participates in resisting the load, thereby further improving the resistance capacity under tension.

[0050] Therefore, this embodiment is provided with a secondary buffer block structure, which can be put into use to participate in resisting the load after being stretched and compressed to a certain degree, thereby improving the resistance strength of the damper. That is, in the early stage, the damping block and the SMA cable resist the load, but as the load increases, the tension buffer block and the compression buffer block are put into use to resist the load according to the load characteristics.

[0051] Embodiment 3: This embodiment further illustrates the structures of the middle tube and the outer tube.

[0052] In this embodiment, under the compression and tension state, the middle tube 2 and the outer tube 1 are relatively displaced. In order to further increase the ability to resist the load, this embodiment Fig.16In the figure, a middle buffer body 17 is fixed on the middle cylinder, and side buffer bodies 18 are arranged on the outer cylinder at intervals. The opposite surfaces of the side buffer body and the middle buffer body are inclined structures. In addition, holes are opened on the middle buffer body and the side buffer body to avoid the SMA cable, and the holes are larger than the SMA cable.

[0053] Under tension or compression, the middle tube and the outer tube slide relative to each other, and the side buffer body on one side moves toward the middle buffer body, so that the inclined surfaces are in contact with each other, and the force generated by the pressure of the inclined surfaces is used to resist the load. The structure in this embodiment can be arranged at any time to resist the load as needed, and can be combined with the structure in Example 2 to form a secondary buffer, or form a tertiary buffer alone, or form a primary buffer together with the damping block.

Claims

1. A self-resetting viscoelastic composite damper with parallel SMA wire rope, characterized in that: It includes an inner cylinder, a middle cylinder, an outer cylinder, an SMA cable, a baffle, a damping rod, a damping block, a left pressure plate, a right pressure plate, a left tail plate and a right tail plate. The inner cylinder is provided with four layers of partitions, which divide the inner cavity of the inner cylinder into a left first cavity, a left second cavity, a central cavity, a right second cavity and a right first cavity from left to right; the inner end of the damping rod is provided with a damping head, and the outer end is provided with a connecting head; the damping head includes a fixed block, a damping block, a left pressure plate and a right pressure plate, the fixed blocks are fixed on the damping rod at intervals, and the left pressure plate, the damping block and the right pressure plate are sequentially mounted on the damping rod from left to right and are located between the two fixed blocks; the damping heads are respectively mounted in the left second cavity and the right second cavity, and the middle of each partition The middle cylinder is provided with a sliding hole and a middle fixing groove on the left and right sides thereof, and an outer fixing groove is provided on the left side thereof. The middle cylinder is matched and sleeved on the outer side of the inner cylinder, and the outer cylinder is sleeved on the outside of the middle cylinder at intervals. The left and right damping rods are respectively provided with a left tail plate and a right tail plate evenly distributed along the axial direction on the outer sides thereof, and the left tail plate is longer than the right tail plate, wherein the left tail plate is sleeved in the sliding hole and fixed in the outer fixing groove, and the right tail plate is fixed in the middle fixing groove, the baffle is sleeved on the two damping rods and is located between the tail plate and the connector, and circular holes are provided on the baffles on both sides, the SMA cable is sleeved in the circular hole, and a limiting block is provided at the end of the SMA cable.

2. The self-resetting viscoelastic composite damper of parallel SMA wire rope according to claim 1, characterized in that: The damping blocks are made of high-damping rubber and are sleeved in the left two cavities and the right two cavities at intervals.

3. The self-resetting viscoelastic composite damper of parallel SMA wire rope according to claim 2, characterized in that: The left pressing plate and the right pressing plate are matched and sleeved in the left two cavities and the right two cavities, and can slide along the left two cavities and the right two cavities.

4. The self-resetting viscoelastic composite damper of parallel SMA wire rope according to claim 1, characterized in that: The left tail plate and the right tail plate array are distributed on the outside of the damping rod, and a plurality of tail plates are correspondingly arranged on the two tail plates, and the ends of the two tail plates are matched and fixedly sleeved in the outer fixing groove and the middle fixing groove respectively.

5. The self-resetting viscoelastic composite damper of parallel SMA wire rope according to claim 1, characterized in that: The SMA cable is located in the cavity between the middle cylinder and the outer cylinder, and the SMA cable is staggered with the left tail plate and the right tail plate.

6. The self-resetting viscoelastic composite damper of parallel SMA wire rope according to claim 1, characterized in that: The inner cylinder includes a central body, a left connecting body and a right connecting body. Two layers of partitions are arranged in the central body at intervals, and internal threads are arranged at both ends. A layer of partition is arranged in the left connecting body and the right connecting body, and external threads are arranged at the connecting ends. The left connecting body and the right connecting body are correspondingly threadedly connected to the left and right sides of the central body.

7. The self-resetting viscoelastic composite damper of parallel SMA wire rope according to claim 1, characterized in that: A pressure buffer block is arranged on the outer fixed block, and the pressure buffer blocks on both sides correspond to each other in the central cavity.

8. The self-resetting viscoelastic composite damper of parallel SMA wire ropes according to claim 1 or 7, characterized in that: Tension buffer blocks corresponding to the fixing blocks are arranged in the left cavity and the right cavity of the inner tube.

9. The self-resetting viscoelastic composite damper of parallel SMA wire ropes according to claim 1, characterized in that: The middle fixing groove and the outer fixing groove are T-shaped groove structures.

10. The self-resetting viscoelastic composite damper of parallel SMA wire ropes according to claim 1, characterized in that: The inner cylinder, the middle cylinder and the outer cylinder are all cylindrical structures made of carbon steel.

Images