Self-centering metallic and friction composite energy dissipation brace

Abstract

The application discloses a self-resetting metal and friction composite energy dissipation support and belongs to the technical field of building structure energy dissipation and shock absorption, which comprises a self-resetting system, a friction energy dissipation system, a metal yielding energy dissipation system, a first end connecting piece and a second end connecting piece. The self-resetting systems are arranged in parallel and oppositely, and the friction energy dissipation system is connected between the self-resetting systems through bolts. The self-resetting system has a sliding part which can relatively slide and reset. The friction energy dissipation system can generate friction force when the sliding part relatively slides. The metal yielding energy dissipation system is arranged between the self-resetting systems. The two ends of the self-resetting system and the metal yielding energy dissipation system are fixedly connected with the first end connecting piece and the second end connecting piece respectively. The first end connecting piece and the second end connecting piece can be connected with a main anti-seismic structure. The self-resetting metal and friction composite energy dissipation support realizes stage-wise and efficient energy dissipation and can better meet different seismic intensity anti-seismic requirements.

Description

Technical Field

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

[0002] Buckling-restrained brace dampers utilize the yielding of a core steel plate under tension and compression to dissipate energy, and provide lateral restraint by setting up a steel-concrete composite tube around the core steel plate, thus preventing buckling instability under stress. Friction dampers utilize the relative sliding between steel plates with preload to dissipate energy through friction, and the damping force can be adjusted by the bolt preload. Both buckling-restrained brace dampers and friction dampers have advantages such as convenient construction, low cost, and stable performance, and are widely used in building structures.

[0003] However, traditional buckling-restrained braced dampers are generally designed to be elastic and not dissipate energy under minor earthquakes, only playing a role in energy dissipation under moderate and major earthquakes. Friction dampers have small yield displacements and are prone to fatigue problems, resulting in low energy dissipation efficiency under major earthquakes. Both buckling-restrained braced dampers and friction dampers suffer from the problem of having only one type of energy dissipation, making them unable to adapt to earthquakes of varying intensities. Furthermore, due to plastic deformation or friction slippage of the damper, it cannot recover its deformation after energy dissipation, leaving significant residual deformation in the main structure after an earthquake, affecting its usability and making it difficult to meet the seismic performance improvement requirements for the reinforcement and renovation of existing buildings.

[0004] Therefore, in order to meet the phased energy dissipation requirements of energy-absorbing and damping components under minor to major earthquakes, reduce the residual deformation of the main structure after the earthquake, and achieve the goal of rapid structural repair, it is necessary to develop a new type of metal-friction composite energy-dissipating support. Summary of the Invention

[0005] In view of this, the present invention provides a self-resetting metal and friction composite energy dissipation support, which realizes the phased energy dissipation requirements of the energy dissipation and damping component under small to large earthquakes, reduces the residual deformation of the main structure after the earthquake, and achieves the goal of rapid structural repair.

[0006] The present invention adopts the following technical solution:

[0007] A self-resetting metal-friction composite energy dissipation support includes a self-resetting system, a friction energy dissipation system, a metal yielding energy dissipation system, a first end connector, and a second end connector.

[0008] A pair of self-resetting systems are arranged in parallel opposite directions, and the friction energy dissipation system is connected between the pair of self-resetting systems arranged in parallel opposite directions by bolts;

[0009] The self-resetting system has a sliding component that can slide relative to each other and is capable of self-resetting;

[0010] The friction energy dissipation system enables the sliding components to generate frictional force during relative sliding;

[0011] The metal yielding energy dissipation system is disposed between a pair of the self-resetting systems;

[0012] Both ends of the self-resetting system and the metal yielding energy dissipation system are respectively fixedly connected to the first end connector and the second end connector; the first end connector and the second end connector can be connected to the seismic main structure.

[0013] Furthermore, the self-resetting system includes H-beams, channel steel, and a prestressing device;

[0014] The H-beam is joined to the channel steel to form a rectangular tube with openings at both ends along its length, and the H-beam and the channel steel can slide relative to each other to form the relative sliding component.

[0015] The prestressing device includes a prestressing tendon, a first end anchor plate, and a second end anchor plate; the two ends of the prestressing tendon are respectively anchored to the first end anchor plate and the second end anchor plate; the first end anchor plate and the second end anchor plate respectively abut against the openings at both ends of the rectangular cylinder, so that the prestressing tendon passes through the inner cavity of the rectangular cylinder and applies prestress to the prestressing tendon.

[0016] Furthermore, the web at one end of the H-beam is provided with a first elongated steel plate;

[0017] A long, straight hole is provided on the first end anchor plate;

[0018] The first elongated steel plate can extend out of the I-shaped elongated hole and be fixedly connected to the first end connector;

[0019] The flange of the channel steel is provided with a second elongated steel plate at the end opposite to the first elongated steel plate, and the second elongated steel plate is fixedly connected to the second end connector.

[0020] Furthermore, in the self-resetting system, one flange of the H-beam is provided with an H-beam flange extension plate, and the H-beam flange extension plate is provided with a straight elongated hole;

[0021] The self-resetting system has a channel steel flange folding plate on the flange of the channel steel, and the channel steel flange folding plate has bolt holes.

[0022] The friction energy dissipation system includes at least one friction energy dissipation unit, which includes a friction plate and a steel pad. The friction plate is provided with bolt holes, and the steel pad is provided with a straight elongated hole.

[0023] The bolt first passes through the bolt holes of the channel steel flange plate in one of the self-resetting systems, the bolt holes of one of the friction plates, and the long, straight hole of the H-shaped steel flange extension plate. Then it passes through the long, straight hole of one of the steel pads. Finally, it passes through the long, straight hole of the H-shaped steel flange extension plate in another self-resetting system, the bolt holes of another friction plate, and the bolt holes of the channel steel flange plate, and is finally threaded into the nut.

[0024] Furthermore, the metal yielding energy dissipation system includes an energy-dissipating steel plate;

[0025] The energy-consuming steel plate has connecting sections at both ends, and a core energy-consuming section is provided between the connecting sections.

[0026] The connecting end is fixedly connected to the first end connector and the second end connector respectively, and the core energy-consuming section is sandwiched between two parallel H-beams.

[0027] Furthermore, the surface of the core energy-consuming section is coated with an adhesive-free material.

[0028] Furthermore, the fixed connection is a bolted connection.

[0029] Beneficial effects:

[0030] 1. A pair of self-resetting systems are arranged in parallel opposite directions, and a friction energy dissipation system is bolted between the pair of self-resetting systems; the self-resetting system has a sliding component that can slide relative to each other and can self-reset; the friction energy dissipation system enables the sliding component in the self-resetting system to generate frictional force during relative sliding; a metal yield energy dissipation system is arranged between the pair of self-resetting systems; both ends of the self-resetting system and the metal yield energy dissipation system are respectively fixed to a first end connector and a second end connector; the first end connector and the second end connector can be connected to the seismic main structure.

[0031] Thus, by combining the friction energy dissipation system with the metal yield energy dissipation system, the friction energy dissipation system can dissipate energy first under frequent earthquakes, while the metal yield energy dissipation system gradually yields and dissipates energy under design earthquakes and rare earthquakes (the metal yield energy dissipation system is designed to not dissipate energy under frequent earthquakes due to elastic deformation, but to begin dissipating energy under design earthquakes and rare earthquakes due to plastic deformation). This solves the problem of the single energy dissipation form of traditional metal dampers, realizes staged and efficient energy dissipation, and can better meet the seismic requirements of different earthquake intensity.

[0032] 2. The two ends of the prestressing tendon are fixedly connected to the first end anchor plate and the second end anchor plate, respectively. The first end anchor plate and the second end anchor plate abut against the openings at both ends of the rectangular tube, allowing the prestressing tendon to pass through the inner cavity of the rectangular tube and apply prestress to the prestressing tendon. In this way, the use of a self-resetting system with prestressing tendons can effectively reduce or eliminate the residual deformation of energy-dissipating supports after an earthquake, which is conducive to the rapid repair of building structures.

[0033] 3. The friction energy dissipation unit is set externally between a pair of self-resetting systems. The friction plates in the friction energy dissipation unit can be disassembled and replaced without disassembling the energy dissipation support, which is convenient for post-earthquake replacement after the friction plates are damaged under frequent earthquakes.

[0034] 4. All system components of this composite support are connected by bolts. After the friction energy dissipation unit and the metal yield energy dissipation unit are worn out, only the energy dissipation unit components need to be replaced. The self-resetting system and other components can be reused, which is economical.

[0035] 5. The connecting ends of the energy-dissipating steel plate are fixedly connected to the first end connector and the second end connector, respectively, so that the core energy-dissipating section is located in the gap left between the self-resetting systems. In this way, a pair of parallel self-resetting systems and the metal energy-dissipating unit set outside the self-resetting system can not only realize frictional energy dissipation, but also provide lateral constraints to the metal energy-dissipating system to realize buckling prevention function, effectively combining the various component systems organically, and realizing the functional upgrade under the same size conditions as traditional buckling-restrained braces. Attached Figure Description

[0036] Figure 1 This is an exploded view of the self-resetting metal and friction composite energy dissipation support structure of the present invention;

[0037] Figure 2 yes Figure 1 A schematic diagram of the structure of a self-resetting system;

[0038] Figure 3 yes Figure 2 An explosion diagram;

[0039] Figure 4 yes Figure 3 Schematic diagram of the structure of H-beams;

[0040] Figure 5 yes Figure 3 Schematic diagram of the structure of the channel steel;

[0041] Figure 6 for Figure 3 Schematic diagram of the prestressed device;

[0042] Figure 7 for Figure 1 A schematic diagram of the friction plate and steel pad in a friction energy dissipation system;

[0043] Figure 8 for Figure 1 Schematic diagram of the structure of the yield energy dissipation system of medium metal;

[0044] Figure 9 for Figure 1 A schematic diagram of the structure of the first end connector;

[0045] Figure 10 for Figure 1 A schematic diagram of the structure of the second end connector;

[0046] Among them, 1-self-resetting system, 2-friction energy dissipation system, 2-1-friction plate, 2-2-steel pad, 2-3 first high-strength bolt, 3-metal yield energy dissipation system, 3-1-core energy dissipation section, 3-2-end connection end, 4-first end connector, 4-1-first end plate, 4-2-first energy dissipation steel plate connecting plate, 4-3-H-beam connecting plate, 5-second end connector, 5-1-second end plate, 5-2-second energy dissipation steel plate 5-3-Channel steel connecting plate, 6-Second high-strength bolt, 7-H-beam, 7-1-H-beam web, 7-2-H-beam flange plate, 7-3-H-beam flange extension plate, 8-Channel steel, 8-1-Channel steel flange plate, 8-2-Channel steel flange extension plate, 8-3-Channel steel flange folded plate, 9-Prestressing device, 9-1-First end anchor plate, 9-2-Second end anchor plate, 9-3-Prestressing tendon, 9-4-Prestressing anchor. Detailed Implementation

[0047] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] Reference Figures 1-10 A self-resetting metal-friction composite energy-dissipating support includes a self-resetting system 1, a friction energy-dissipating system 2, a metal yielding energy-dissipating system 3, a first end connector 4, and a second end connector 5, with the following connection relationship:

[0049] A pair of self-resetting systems 1 are arranged in parallel opposite directions, and a friction energy dissipation system 2 is bolted between the pair of self-resetting systems 1. The self-resetting system 1 has a sliding component that can slide relative to each other and can self-reset. The friction energy dissipation system 2 enables the sliding component to generate friction during relative sliding. A metal yield energy dissipation system 3 is arranged between the pair of self-resetting systems 1. Both ends of the self-resetting system and the metal yield energy dissipation system are respectively fixed to the first end connector 4 and the second end connector 5. The first end connector and the second end connector can be connected to the seismic main structure.

[0050] Thus, by combining the friction energy dissipation system 2 with the metal yield energy dissipation system 3, the friction energy dissipation system 2 dissipates energy first under frequent earthquakes, while the metal yield energy dissipation system 3 gradually yields and dissipates energy under design earthquakes and rare earthquakes. This solves the problem of the single energy dissipation form of traditional metal dampers, realizes efficient energy dissipation in stages, and can better meet the seismic resistance requirements of different earthquake intensity.

[0051] The aforementioned pair of parallel self-resetting systems have identical structures. Taking one of these self-resetting systems as an example, the following description will illustrate its structure. The self-resetting system can be a reset system composed of a spring stacking device. In this embodiment, the self-resetting system adopts a structure different from that of a reset system composed of a spring stacking device, specifically including H-beams 7, channel steel 8, and a prestressing device 9. These will be described in detail below:

[0052] One end of the H-beam web 7-1 is provided with a first extended section steel plate with bolt holes, making the length of the H-beam web 7-1 1l larger than the length of the two H-beam flanges 7-2 (1l is not less than twice the design displacement of the energy dissipation support). Six H-beam flange extension plates 7-3 with I-shaped elongated holes are welded to the upper and lower sides of one of the H-beam flanges 7-2 at both ends and the middle.

[0053] The length of channel steel 8 is the same as the length of H-beam flange plate 7-2. The height of the internal groove opening of channel steel 8 is not less than the height of H-beam flange plate 7-2, and preferably the same as the height of H-beam flange plate 7-2. The width of channel steel flange plate 8-1 is preferably the same as the width of H-beam 7. One end of channel steel flange plate 8-1 is welded with channel steel flange extension steel plate 8-2 with bolt holes. The length of the welded section should meet the weld strength requirements and extend beyond channel steel 8 by a length l2 (l2 is not less than twice the design displacement of the energy dissipation support).

[0054] The ends and middle parts of the two channel steel flange plates 8-1 are respectively welded with channel steel flange folded plates 8-3 with bolt holes. The channel steel flange folded plates 8-3 are adapted to the size and position of the H-shaped steel flange extension plate 7-3 with a straight hole.

[0055] The prestressing device 9 includes a first end anchor plate 9-1 with a straight elongated hole, a second end anchor plate 9-2, and prestressing tendons 9-3. The first end anchor plate 9-1 and the second end anchor plate 9-2 each have two prestressing tendon anchor holes. The two ends of the two prestressing tendons 9-3 are respectively anchored to the prestressing tendon anchor holes of the first end anchor plate 9-1 and the second end anchor plate 9-2 via prestressing anchors 9-4. The straight elongated hole on the first end anchor plate 9-1 is used to allow the first elongated section of the H-beam web 7-1 to pass through.

[0056] The structures of friction energy dissipation system 2, metal yield energy dissipation system 3, first end connector 4, and second end connector 5 will be described in detail below:

[0057] The metal yield energy dissipation system 3 includes an energy dissipation steel plate. The two ends of the energy dissipation steel plate are connecting sections 3-2 with several bolt holes. The core energy dissipation section 3-1 is located between the connecting sections 3-2. The cross-sectional height of the connecting section 3-2 is greater than the cross-sectional height of the core energy dissipation section 3-1. The connecting section 3-2 and the core energy dissipation section 3-1 are connected by a trapezoidal section.

[0058] The friction energy dissipation system 2 includes six sets of friction energy dissipation units (the specific number can be flexibly selected according to the working conditions). Each set of friction energy dissipation units includes two friction plates 2-1 and one steel pad 2-2. The friction plates 2-1 are provided with bolt holes, and the steel pad 2-2 is provided with a straight elongated hole. The size of this straight elongated hole is the same as the size of the straight elongated hole in the H-beam steel flange extension plate 7-3. Furthermore, the thickness of the steel pad 2-2 is equal to the thickness of the metal energy-dissipating steel plate 3. Figure 1 As shown, in each friction energy dissipation unit, the two friction plates 2-1 are respectively sandwiched between the channel steel flange folded plate 8-3 and the H-shaped steel flange extension plate 7-3 of the two parallel self-resetting systems 1, and the steel pad 2-2 is sandwiched between the two parallel H-shaped steel flange extension plates 7-3.

[0059] The first end connector 4 includes a first end plate 4-1 with bolt holes, a first energy-consuming steel plate connecting plate 4-2 with bolt holes, and an H-beam connecting plate 4-3 with bolt holes. The first energy-consuming steel plate connecting plate 4-2 is vertically arranged in the middle of one end face of the first end plate 4-1, and the H-beam connecting plate 4-3 is arranged in the middle of both sides of the first energy-consuming steel plate connecting plate 4-2.

[0060] The second end connector 5 includes a second end plate 5-1 with bolt holes, a second energy-consuming steel plate connecting plate 5-2 with bolt holes, and a channel steel connecting plate 5-3 with bolt holes. The second energy-consuming steel plate connecting plate 5-2 is vertically arranged in the middle of one end face of the second end plate 5-1, and the channel steel connecting plate 5-3 is arranged at the upper and lower ends on both sides of the second energy-consuming steel plate connecting plate 5-2.

[0061] The assembly method of this composite support is described below:

[0062] When assembling the self-resetting system 1, the first end anchor plate 9-1 and the second end anchor plate 9-2 are first abutted against the two ends of the H-beam 7 along its length, and the two prestressing tendons 9-3 are respectively located on the upper and lower sides of the web plate 7-1 of the H-beam. Then, the H-beam 7 is connected to the channel opening side of the channel steel 8, so that the flange extension plate 7-3 of the H-beam and the flange folded plate 8-3 of the channel steel are connected one by one to form a rectangular cylinder with openings at both ends along its length. The first end anchor plate 9-1 and the second end anchor plate 9-2 are respectively abutted against the openings at both ends of the rectangular cylinder (equivalent to the prestressing tendons 9-3 passing through the inner cavity of the rectangular cylinder).

[0063] Furthermore, in the rectangular cylinder, the first extended section steel plate on the H-beam web 7-1 and the channel steel flange extended steel plate 8-2 (equivalent to the second extended section steel plate) on the channel steel 8 are located at the two ends of the rectangular cylinder, respectively. The first extended section steel plate passes through the straight hole of the first end anchor plate 9-1 and is connected and fixed to the H-beam connecting plate 4-3 in the first end connector 4 by the second high-strength bolt 6. The channel steel flange extended steel plate 8-2 and the channel steel connecting plate 5-3 in the second end connector 5 are connected and fixed by high-strength bolts.

[0064] During assembly of the friction energy dissipation system 2, the bolts are first passed through the bolt holes of the channel steel flange plate 8-3 in a self-resetting system 1, the bolt holes of a friction plate 2-1, and the long, straight hole of the H-beam flange extension plate 7-3, then through the long, straight hole of a steel pad 2-2, and finally through the long, straight hole of the H-beam flange extension plate 7-3 in another self-resetting system 1, the bolt holes of another friction plate 2-1, and the bolt holes of the channel steel flange plate 8-3, and finally secured with nuts. A preload along the length direction is applied to the friction energy dissipation unit and the self-resetting system 1, so that friction is generated when the H-beam 7 and the channel steel 8 slide relative to each other.

[0065] A gap the size of a steel pad 2-2 is left between two parallel H-beams 7, allowing the core energy-dissipating section 3-1 of the energy-dissipating steel plate in the metal yielding energy-dissipating system 3 to be sandwiched within this gap. The connecting ends of the energy-dissipating steel plate are respectively bolted to the first energy-dissipating steel plate 4-2 on the first end connector 4 and the second energy-dissipating steel plate connecting plate 5-2 on the second end connector 5. The surface of the core energy-dissipating section 3-1 can be coated with a non-adhesive material to reduce the influence of the self-resetting system 1 on the axial force of the metal yielding energy-dissipating system 3, that is, to reduce the friction between the parallel self-resetting system 1 and the energy-dissipating steel plate, thus avoiding damage to the metal energy-dissipating steel plate. In this embodiment, the non-adhesive material can be rubber, polyethylene, silicone, latex, anti-corrosion grease, etc. Specifically, the selection of the non-adhesive material can refer to the standard "Anti-corrosion Grease for Non-adhesive Prestressed Tendons" in the People's Republic of China Construction Industry Standard.

[0066] The working principle of this composite support is as follows: When the first end connector 4 and the second end connector 5, which are connected to the seismic main structure, are squeezed by external force, one end of the H-beam 7 pushes against the second end anchor plate 9-2 and moves together in the direction of the compression of the first end connector 4, causing the second end anchor plate 9-2 to separate from the end of the channel steel 8. The end of the channel steel 8 pushes against the first end anchor plate 9-1 and moves together in the direction of the compression of the second end connector 5, causing the first end anchor plate 9-1 to separate from the end of the H-beam 7. That is, the H-beam 7 and the channel steel 8 slide towards each other. During this process of sliding towards each other, the distance between the first end anchor plate 9-1 and the second end anchor plate 9-2 increases.

[0067] When the first end connector 4 and the second end connector 5 are stretched by an external force, the end of the H-beam 7 pushes against the first end anchor plate 9-1 and moves together in the direction of the tension force on the first end connector 4, causing the first end anchor plate 9-1 to separate from the end of the channel steel 8. The channel steel 8 pushes against the second end anchor plate 9-2 and moves together in the direction of the tension force on the second end connector 5, causing the second end connector 9-2 to separate from the end of the H-beam 7. That is, the H-beam 7 and the channel steel 8 slide in opposite directions. During this process of sliding in opposite directions, the distance between the first end anchor plate 9-1 and the second end anchor plate 9-2 will also increase.

[0068] When the first end connector 4 and the second end connector 5 are squeezed or stretched by external force, the first end anchor plate 9-1 and the second end anchor plate 9-2 are separated from the two ends of the rectangular cylinder along the length direction. After the external force disappears, the prestress of the prestressing tendon 9-3 will force the first end anchor plate 9-1 and the second end anchor plate 9-2 to return to their original positions, which has a self-resetting function. The friction energy dissipation unit in friction energy dissipation system 2 generates friction when H-beam 7 and channel steel 8 slide relative to each other (including sliding towards each other and sliding away from each other), thus achieving friction energy dissipation. This friction energy dissipation exists as long as H-beam 7 and channel steel 8 slide relative to each other. In contrast, the energy-dissipating steel plate in metal yield energy dissipation system 3 only undergoes elastic deformation when the relative sliding distance between H-beam 7 and channel steel 8 is short (corresponding to frequent earthquakes), and elastic deformation does not dissipate energy. When the relative sliding distance between H-beam 7 and channel steel 8 is long (corresponding to design earthquakes and rare earthquakes), the energy-dissipating steel plate in metal yield energy dissipation system 3 undergoes plastic deformation, thus achieving metal yield energy dissipation (and at this time, metal yield energy dissipation is dominant compared to friction energy dissipation). In other words, the present invention combines the friction energy dissipation system 2 with the metal yield energy dissipation system 3, which enables the friction energy dissipation system 2 to dissipate energy first under frequent earthquakes, and the metal yield energy dissipation system 3 to gradually yield and dissipate energy under design earthquakes and rare earthquakes. This solves the problem of the single energy dissipation form of traditional metal dampers, realizes staged and efficient energy dissipation, and can better meet the seismic resistance requirements of different earthquake intensity.

[0069] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A self-resetting metal and friction composite energy-dissipating support, characterized in that, It includes a self-resetting system, a friction energy dissipation system, a metal yield energy dissipation system, a first end connector, and a second end connector; A pair of self-resetting systems are arranged in parallel opposite directions, and the friction energy dissipation system is connected between the pair of self-resetting systems arranged in parallel opposite directions by bolts; The self-resetting system has a sliding component that can slide relative to each other and is capable of self-resetting; The friction energy dissipation system enables the sliding components to generate frictional force during relative sliding; The metal yielding energy dissipation system is disposed between a pair of the self-resetting systems; Both ends of the self-resetting system and the metal yield energy dissipation system are respectively fixedly connected to the first end connector and the second end connector; the first end connector and the second end connector can be connected to the seismic main structure; the self-resetting system includes H-beams, channel steel and prestressing devices. The H-beam is joined to the channel steel to form a rectangular tube with openings at both ends along its length, and the H-beam and the channel steel can slide relative to each other to form a relatively sliding component. The web of one end of the H-beam is provided with a first elongated steel plate; the first end anchor plate is provided with a straight elongated hole; the first elongated steel plate can extend out of the straight elongated hole and be fixedly connected to the first end connector; the flange of the channel steel is provided with a second elongated steel plate at the end opposite to the first elongated steel plate, and the second elongated steel plate is fixedly connected to the second end connector. The prestressing device includes a prestressing tendon, a first end anchor plate, and a second end anchor plate; the two ends of the prestressing tendon are respectively anchored to the first end anchor plate and the second end anchor plate; the first end anchor plate and the second end anchor plate respectively abut against the openings at both ends of the rectangular cylinder, so that the prestressing tendon passes through the inner cavity of the rectangular cylinder and applies prestress to the prestressing tendon.

2. The self-resetting metal and friction composite energy-dissipating support according to claim 1, characterized in that, In the self-resetting system, one flange of the H-beam is provided with an H-beam flange extension plate, and the H-beam flange extension plate is provided with a straight elongated hole; The self-resetting system has a channel steel flange folding plate on the flange of the channel steel, and the channel steel flange folding plate has bolt holes. The friction energy dissipation system includes at least one friction energy dissipation unit, which includes a friction plate and a steel pad. The friction plate is provided with bolt holes, and the steel pad is provided with a straight elongated hole. The bolt first passes through the bolt holes of the channel steel flange plate in one of the self-resetting systems, the bolt holes of one of the friction plates, and the long, straight hole of the H-shaped steel flange extension plate. Then it passes through the long, straight hole of one of the steel pads. Finally, it passes through the long, straight hole of the H-shaped steel flange extension plate in another self-resetting system, the bolt holes of another friction plate, and the bolt holes of the channel steel flange plate, and is finally threaded into the nut.

3. The self-resetting metal and friction composite energy-dissipating support according to claim 2, characterized in that, The metal yielding energy dissipation system includes an energy-dissipating steel plate; The energy-consuming steel plate has connecting sections at both ends, and a core energy-consuming section is provided between the connecting sections. The connecting section is fixedly connected to the first end connector and the second end connector respectively, and the core energy-consuming section is sandwiched between two parallel H-beams.

4. The self-resetting metal and friction composite energy-dissipating support according to claim 3, characterized in that, The surface of the core energy-consuming section is coated with an adhesive-free material.

5. A self-resetting metal and friction composite energy-dissipating support according to any one of claims 1-4, characterized in that, The fixed connection is a bolted connection.

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