A high-ductility double-yield-point energy-dissipating coupling beam with an embedded negative Poisson's ratio energy-dissipating plate

Abstract

This application proposes a high-ductility double-yield-point energy-dissipating coupling beam with an embedded negative Poisson's ratio energy-dissipating plate, comprising: a coupling beam body, with a negative Poisson's ratio core plate embedded within the coupling beam body, the negative Poisson's ratio core plate deforming under seismic loading, triggering first-order energy dissipation; a first plate, several first plates arranged at intervals on at least one side of the negative Poisson's ratio core plate, with one end fixed to the first end of the coupling beam body and the other end cantilevered; a second plate, several second plates arranged at intervals on at least the same side of the negative Poisson's ratio core plate, with one end fixed to the second end of the coupling beam body and the other end cantilevered; and the first and second plates are arranged alternately, with their cantilevered ends extending into each other to form an overlap, generating hard contact and mutual compression under seismic loading, triggering second-order energy dissipation. This application significantly improves the energy dissipation capacity of the coupling beam and reduces damage to the main structure through design concepts such as a staged yielding mechanism, buckling resistance design, and multi-mode energy dissipation synergy.

Description

Technical Field

[0001] This application relates to the field of building structure technology, especially the field of energy dissipation and vibration reduction technology in structural engineering, specifically to a high-ductility double-yield-point energy dissipation coupling beam with an embedded negative Poisson's ratio energy dissipation plate. Background Technology

[0002] In high-rise and super high-rise buildings, coupling beams are crucial seismic components connecting shear wall segments, playing a key role in the overall seismic performance of the structure. Traditional reinforced concrete coupling beams are widely used due to their ease of construction and low cost; however, when the span-to-depth ratio is less than 2.5, they are prone to shear failure, have limited ductility and energy dissipation capacity, and are difficult to repair after an earthquake. While steel coupling beams offer good ductility and energy dissipation, under seismic loading, the web can experience local buckling, shear failure, fatigue damage, or instability. These problems mainly arise from the repeated loading and stress concentration effects caused by seismic loading, leading to plastic deformation or failure of the web in high-stress areas (such as beam ends, connections, or near stiffeners), thus affecting the overall seismic performance of the steel coupling beam.

[0003] In view of the above, this application is hereby submitted. Summary of the Invention

[0004] To address the problems existing in existing coupling beams, this application proposes a high-ductility double-yield-point energy-dissipating coupling beam with an embedded negative Poisson's ratio energy-dissipating plate. The aim is to significantly improve the energy dissipation capacity of the coupling beam, reduce damage to the main structure, and improve economic efficiency through design concepts such as a staged yielding mechanism, buckling resistance design, and multi-mode energy dissipation synergy.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] This application provides a high-ductility double-yield-point energy-dissipating coupling beam with an embedded negative Poisson's ratio energy-dissipating plate, comprising:

[0007] The coupling beam body has a negative Poisson ratio core plate embedded in it. The negative Poisson ratio core plate deforms under seismic action, triggering first-order energy dissipation.

[0008] The first plate, several first plates are arranged at a certain gap on at least one side of the negative Poisson's ratio core plate, and one end of the first plate is fixed to the first end of the connecting beam body, and the other end is cantilevered.

[0009] The second plate, comprising several second plates arranged at least on the same side of the negative Poisson's ratio core plate with a certain gap, is fixed at one end to the second end of the connecting beam body and cantilevered at the other end; and

[0010] The first plate and the second plate are arranged alternately, with their cantilever ends extending into each other to form an overlap. Under seismic action, they make hard contact and squeeze each other, triggering second-order energy dissipation.

[0011] Preferably, the main body of the connecting beam is an I-beam or an H-beam, and the web of the I-beam or H-beam forms the negative Poisson's ratio core plate.

[0012] Preferably, the negative Poisson's ratio core plate has peanut-shaped holes arranged in an alternating horizontal and vertical array to create a negative Poisson's ratio effect.

[0013] Preferably, end plates are welded to both ends of the I-beam or H-beam;

[0014] Several end plates, one end of the first plate, are welded and fixed to the first end of the I-beam or H-beam;

[0015] Several end plates of the second plate are welded and fixed at one end to the second end of the I-beam or H-beam.

[0016] Preferably, the end plate is provided with bolt holes for connection with pre-embedded bolts in the shear wall.

[0017] Preferably, some of the first plates are straight plates, and some of the second plates are folded plates;

[0018] Furthermore, the bent end of each folded plate is cantilevered and faces the cantilever end of the corresponding straight plate.

[0019] Preferably, there is more than one straight plate than the folding plate.

[0020] Preferably, some of the first plates are folded plates, and some of the second plates are folded plates;

[0021] Furthermore, the bent end of each folded plate is cantilevered and faces the bent end of the corresponding folded plate, forming an interlocking state.

[0022] Preferably, some of the first plates are T-shaped plates, and some of the second plates are T-shaped plates;

[0023] Furthermore, the bent end of each T-shaped plate is cantilevered and faces the bent end of the corresponding T-shaped plate, forming an interlocking state.

[0024] The advantages of this application over the prior art are:

[0025] (1) Staged yielding. Under seismic action, the first-order energy dissipation component begins to work, and the peanut-shaped web plate enters the plastic deformation stage. It absorbs energy through the negative Poisson's ratio effect while ensuring the elasticity of the main structure. As the peanut-shaped web plate deforms, the gap between the straight plate and the folded plate welded to the end plate gradually decreases until the straight plate and the folded plate make hard contact. The second-order energy dissipation is then initiated. Energy is dissipated through the hard contact between the straight plate and the folded plate, forming a composite energy dissipation mode of shear energy dissipation and bending energy dissipation. This effectively improves the yield strength and energy dissipation capacity of the coupling beam system and realizes two-stage yielding energy dissipation.

[0026] (2) Multiple energy dissipation mechanisms work together. From the buckling of the peanut-shaped web-connected beam to the second-order energy dissipation triggered by the hard contact between the straight plate and the folded plate, a smooth transition from "flexible energy dissipation" to "rigid energy dissipation" is achieved. This collectively dissipates seismic energy.

[0027] (3) Under seismic loading, when the displacement angle of the coupling beam reaches the preset threshold, the straight plate and the folded plate trigger second-order energy dissipation through a hard contact mechanism. The "sandwich" layout of the folded plate (3 straight plates + 3 folded plates) disperses the stress to 6 contact points, forming a "friction-compression" composite energy dissipation path. The design concept of double yielding can coordinate and control structural deformation, avoid deformation concentration, and effectively prevent the "weak layer" effect of the structure.

[0028] (4) The peanut-shaped web has a high shear buckling load resistance, which can make full use of its excellent indentation resistance and high damping and high energy dissipation characteristics, significantly improving the shear energy dissipation capacity of the coupling beam; the peanut-shaped holes can disperse stress concentration, allowing the web to generate uniform plastic hinges under repeated loads, avoiding brittle cracking; the reasonable opening ratio and opening structure of the peanut-shaped web can also effectively avoid the problem of out-of-plane deformation, making its hysteretic performance stable.

[0029] It should be understood that the implementation of any embodiment of this application does not mean that it will simultaneously possess or achieve multiple or all of the above-mentioned beneficial effects. Attached Figure Description

[0030] To more clearly illustrate the embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0031] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

[0032] Figure 1 A three-dimensional diagram of a high-ductility double-yield-point energy-dissipating coupling beam with an embedded negative Poisson's ratio energy-dissipating plate;

[0033] Figure 2 A split view of a high-ductility double-yield-point energy-dissipating coupling beam with an embedded negative Poisson's ratio energy-dissipating plate;

[0034] Figure 3A three-dimensional model of a high-ductility double-yield-point energy-dissipating coupling beam with an embedded negative Poisson's ratio energy-dissipating plate.

[0035] Figure 4 A front view of an embodiment of a high-ductility double-yield-point energy-dissipating coupling beam with an embedded negative Poisson's ratio energy-dissipating plate;

[0036] Figure 5 This is a front view of a second embodiment of a high-ductility double-yield-point energy-dissipating beam with an embedded negative Poisson's ratio energy-dissipating plate;

[0037] Figure 6 This is a front view of embodiment three of a high-ductility double-yield-point energy-dissipating coupling beam with an embedded negative Poisson's ratio energy-dissipating plate;

[0038] Figure 7 This is a top view of a high-ductility double-yield-point energy-dissipating coupling beam with an embedded negative Poisson's ratio energy-dissipating plate.

[0039] Marked in the image:

[0040] The main body of the connecting beam is 1, the negative Poisson ratio core plate is 11, the first plate is 2, the second plate is 3, and the end plate is 4.

[0041] In the various figures, the same or corresponding reference numerals indicate the same or corresponding parts. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments and descriptions of this application are used to explain this application, but are not intended to limit this application.

[0043] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] It should be understood that the terms "comprising / including," "consisting of," or any other variations are intended to cover non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements includes not only those elements but may also include, where necessary, other elements not expressly listed, or elements inherent to such a product, apparatus, process, or method. Without further limitation, an element defined by the phrases "comprising / including," "consisting of," does not exclude the presence of additional identical elements in the product, apparatus, process, or method that includes said element.

[0045] It should also be understood that the terms “upper,” “lower,” “front,” “back,” “left,” “right,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device, component, or structure referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation on this application.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0047] As mentioned in the background section, traditional reinforced concrete coupling beams and steel coupling beams have insufficient seismic performance under earthquake loading. Based on a series of innovative design concepts, including a phased yielding mechanism, buckling resistance design, and multi-mode energy dissipation synergy, this application proposes a high-ductility double-yield-point energy dissipation coupling beam with an embedded negative Poisson's ratio energy dissipation plate, which can achieve phased yielding for different earthquake levels.

[0048] The following is a detailed description of the specific implementation and preferred scheme of a high-ductility double-yield-point energy-dissipating connecting beam with an embedded negative Poisson's ratio energy-dissipating plate, as described in this application.

[0049] like Figure 1-7 As shown, a high-ductility double-yield-point energy-dissipating coupling beam with an embedded negative Poisson's ratio energy-dissipating plate mainly includes: a coupling beam body 1, a first plate 2, and a second plate 3. The coupling beam body 1, as the main structure of the entire energy-dissipating coupling beam, bears the main load and performs first-order energy dissipation in the initial stage of stress and deformation. The first plate 2 and the second plate 3 are installed on the coupling beam body 1, and the two cooperate with each other to perform second-order energy dissipation when the stress and deformation reach a certain level, thus realizing a staged yielding and multi-mode coordinated energy dissipation mechanism.

[0050] Specifically, see Figure 2The main body of the connecting beam 1 is embedded with a negative Poisson's ratio core plate 11. The negative Poisson's ratio core plate 11 has a negative Poisson's ratio effect and deforms under seismic action, triggering first-order energy dissipation.

[0051] In one embodiment, the main body 11 of the connecting beam is an I-beam or an H-beam, and the web of the I-beam or H-beam forms a negative Poisson's ratio core plate 11.

[0052] Specifically, peanut-shaped holes are arranged in an alternating horizontal and vertical array on the web of I-beams or H-beams to create a negative Poisson's ratio effect.

[0053] The negative Poisson's ratio core plate 11 can have peanut-shaped holes opened within a predetermined length in the middle of the web of an I-beam or H-beam to form a central weakening zone, or peanut-shaped holes can be opened throughout the entire web. The peanut-shaped holes are arranged in an alternating horizontal and vertical array, i.e., alternating between horizontal and vertical, and the array is arranged in multiple rows and columns. As shown in the figure, 7 rows and 19 columns of peanut-shaped holes are set on the web. In the same row, a horizontal peanut-shaped hole is alternated with a vertical peanut-shaped hole, and in the same column, a vertical peanut-shaped hole is alternated with a horizontal peanut-shaped hole.

[0054] The negative Poisson's ratio effect causes the core plate to exhibit lateral contraction under stress, thus avoiding buckling instability caused by lateral expansion in traditional structures and achieving a buckling-free effect. Simultaneously, the negative Poisson's ratio characteristic gives the core plate greater ductility, improving the ductility and durability of the component and enabling it to maintain stable performance under multiple seismic loadings. Furthermore, the negative Poisson's ratio effect optimizes the energy dissipation mechanism, giving the core plate excellent indentation resistance and impact resistance, which can better improve the shear energy dissipation capacity of the coupling beam, and enhance the structure's energy absorption and seismic resistance under extreme loads.

[0055] In addition, by designing peanut-shaped holes on the web to weaken the structure, the problem of needing stiffening ribs in traditional flat webs can be avoided. A reasonable opening ratio can be designed to achieve lightweight design and reduce the self-weight. At the same time, by changing the cross-sectional shape of this area, the load-bearing capacity is lower than that of the end connection area, which effectively guides plastic deformation to occur in the middle of the component and prevents excessive plastic deformation or damage in other areas, thereby improving the energy dissipation capacity of the system.

[0056] The opening ratio of peanut-shaped holes is determined according to design requirements. If the opening ratio is too small, the negative Poisson's ratio effect will be difficult to reflect. If the opening ratio is too large, the structural strength will be difficult to guarantee. Studies have shown that an opening ratio of 40-50% is appropriate, that is, a solid ratio of 50-60% is a reasonable range.

[0057] Of course, in addition to peanut-shaped holes, elliptical holes, star-shaped holes, and other types of holes can also be used to make the inner core have negative Poisson bit properties.

[0058] See also Figure 1 , Figure 2 The first plate 2 consists of several plates arranged at intervals on at least one side of the negative Poisson's ratio core plate 11. One end (left end in the figure) of the first plate 2 is fixed to the first end (left end in the figure) of the connecting beam body 1, and the other end (right end in the figure) is cantilevered. Similarly, the second plate 3 consists of several plates arranged at intervals on at least the same side of the negative Poisson's ratio core plate 11. One end (right end in the figure) of the second plate 3 is fixed to the second end (right end in the figure) of the connecting beam body 1, and the other end (left end in the figure) is cantilevered. It is easy to understand that the cantilevered end of the first plate 2 (or the second plate 3) is free and not connected to the connecting beam body 1. The entire first plate 2 (or the second plate 3) is only rigidly connected to the corresponding end of the connecting beam body 1 at the fixed end, while the other parts are in a cantilevered free state.

[0059] In this application, the first plate 2 and the second plate 3 are arranged alternately in the vertical direction, for example, from top to bottom, one first plate 2, one second plate 3, one first plate 2… and so on, with each plate evenly distributed, i.e., spaced at the same distance. The specific number of plates is determined by the design requirements. In this alternately arranged state, the cantilever ends of the first plate 2 and the second plate 3 extend into each other to form an overlap. The length of the overlap area is determined by the design requirements. Thus, under seismic action, the main beam 1 deforms, and the cantilever ends of the first plate 2 and the second plate 3 shift, resulting in hard contact and mutual compression, triggering second-order energy dissipation.

[0060] Through the coupled design of rigid connection and gap control, the energy dissipation of the peanut-shaped web plate under small deformation (small or moderate earthquake) and the increased deformation of the peanut-shaped web plate under large deformation (large earthquake) lead to hard contact between the straight plate and the folded plate, forming a multiple energy dissipation mechanism of web plate shear deformation and bending deformation of the straight plate and the folded plate, which further improves the energy dissipation capacity of the coupling beam system and realizes two-stage energy dissipation.

[0061] In one embodiment, such as Figure 3 End plates 4 are welded to both ends of the I-beam or H-beam to close both ends, forming a semi-closed box girder structure. Using the end plates 4, several first plates 2 are welded and fixed at one end to the end plates 4 at the first end of the I-beam or H-beam, and several second plates 3 are welded and fixed at one end to the end plates 4 at the second end of the I-beam or H-beam. Neither the first plates 2 nor the second plates 3 contact the web of the I-beam or H-beam. The end plates 4 reinforce the strength and overall rigidity of the steel beam at both ends, and also serve as fulcrums for fixing the fixed ends of the first plates 2 and second plates 3. When the steel beam deforms, the first plates 2 and second plates 3, using their fixed ends as fulcrums, deform and shift at their free ends, thus achieving hard contact.

[0062] In addition, bolt holes are provided on end plate 4 for connection with pre-embedded bolts in shear wall, thereby installing the entire connecting beam.

[0063] In one embodiment, such as Figure 4 As shown, a specific hard contact arrangement is provided. The first plate 2 and the second plate 3 are both strip plates. Several first plates 2 are straight plates, and several second plates 3 are folded plates. Straight plates are flat strip plates, and folded plates are free-end bent plates. For example, in this embodiment, the free end is bent at 90°, and the bent end of each folded plate faces the cantilever end of the corresponding straight plate.

[0064] Preferably, in this embodiment, four straight plates and three folded plates are arranged, with a total of eight straight plates and six folded plates on both sides of the web plate, meaning there is one more straight plate than folded plate. This encloses all the folded plates within the straight plates, ensuring sufficient hard contact. Specifically, when the connecting beam bends clockwise, the upper three straight plates and folded plates make hard contact and enter the working state; when the connecting beam bends counterclockwise, the lower three straight plates and folded plates make hard contact and enter the working state. The plates involved in the working process differ under the two bending conditions, hence the four plates are arranged.

[0065] Under seismic loading, when the displacement angle of the coupling beam reaches a preset threshold, the straight plate and the folded plate, especially at the free end, undergo displacement and compression. The bending yielding dissipates seismic energy, overcoming the drawback of concentrated yield points in traditional coupling beams. Second-order energy dissipation is triggered through a hard contact mechanism. The "sandwich" layout of the folded plates (4 straight plates + 3 folded plates) disperses stress to 6 contact points, forming a "friction-compression" composite energy dissipation path. This double-yield design concept can coordinate and control structural deformation, preventing large concentrated deformations and the formation of weak layers.

[0066] Specifically, when entering the second-order energy consumption stage, the folded plate always participates in the work first. When the folded plate deforms upward, the three upper straight plates come into contact with the folded plate and participate in the second-order energy consumption together. When the folded plate deforms downward, the three lower straight plates come into contact with the folded plate and participate in the second-order energy consumption together.

[0067] In another embodiment, such as Figure 5 As shown, another specific hard contact arrangement is provided, in which several first plates 2 are folded plates, several second plates 3 are folded plates, and the bent end of each folded plate is cantilevered and faces the bent end of the corresponding folded plate, forming an interlocking state. Compared with embodiment one, the corresponding two cantilevered ends are bent to form an interlocking state, which can ensure that effective hard contact can be generated regardless of whether the connecting beam bends upward or downward.

[0068] In yet another embodiment, such as Figure 6As shown, another specific hard-contact arrangement is provided, in which several first plates 2 are T-shaped plates, several second plates 3 are T-shaped plates, and the bent end of each T-shaped plate is cantilevered and faces the bent end of the corresponding T-shaped plate, forming an interlocking state. It is easy to understand that the bent end of the T-shaped plate is the top of the T-shape. Compared with Embodiment 1 and Embodiment 2, the two corresponding cantilever ends are both T-shaped bent structures, forming an interlocking state, which can ensure that effective hard contact can be generated regardless of whether the connecting beam bends upward or downward, and the second plate 3 can not only make hard contact with the first plate 2 above it, but also with the first plate 2 below it.

[0069] In summary, this application provides a high-ductility double-yield-point energy-dissipating coupling beam with an embedded negative Poisson's ratio energy-dissipating plate. This beam can achieve staged yielding for different earthquake magnitudes. Under frequent earthquakes, seismic energy is dissipated through the plastic deformation of the negative Poisson's ratio peanut-shaped web of the first-order energy-dissipating component. Under rare earthquakes, as the external force continues to increase, when the deformation of the peanut-shaped web reaches a certain level, the second-order energy-dissipating component begins to participate in energy dissipation when the straight plate welded to the end plate and the folded plate (or folded plate to folded plate) come into contact, further improving the structure's energy dissipation capacity. This overcomes the shortcomings of traditional coupling beams, such as insufficient energy dissipation capacity and susceptibility to failure under rare earthquake conditions. Through the carefully designed two energy-dissipating components, the coupling beam can sequentially enter a plastic state under different stress levels, effectively dispersing and absorbing seismic energy. The coupled design of rigid connection and gap control forms a smooth transition from low-stress plastic yielding to high-stress multi-energy dissipation, achieving the combined dissipation of seismic energy through bending and shear deformation. Negative Poisson's ratio energy-dissipating plates exhibit unique deformation behavior, excellent indentation resistance, and impact resistance. Incorporating negative Poisson's ratio energy-dissipating webs into coupling beams can significantly improve their shear energy dissipation capacity and enhance the structure's energy absorption efficiency. Hard contact between the straight and folded plates connected to the end plates further enhances the energy dissipation capacity of the coupling beam system, achieving two-stage energy dissipation. Furthermore, the coupling beams in this application utilize a negative Poisson's ratio structural design, fully leveraging their high shear strength, high energy dissipation, and high damping characteristics. Under load, the peanut-shaped energy-dissipating webs not only absorb dissipated energy using negative Poisson's ratio characteristics but also reduce local stress and deformation through material plastic deformation, significantly enhancing buckling resistance and maintaining the stable shape and performance of the coupling beam. The lightweight nature of the negative Poisson's ratio energy-dissipating webs also greatly reduces material costs. Existing technologies do not disclose the synergistic design of staged yielding and negative Poisson's ratio energy-dissipating plates. This application, through a combination of hard contact mechanisms and multi-mode energy dissipation paths, solves the core problem of insufficient energy dissipation capacity in traditional coupling beams.

[0070] All welding processes in this application can be completed in the prefabrication plant, which produces standard "modules." On-site construction only requires positioning the modules according to the pre-drilled bolt holes and assembling them with high-strength bolts to complete the structural installation, exhibiting a high degree of modularity. This "building block" construction concept reduces labor usage, lowers construction difficulty, and thus effectively shortens the construction cycle.

[0071] This application can be applied to single-story buildings, or it can be combined with detachable and replaceable shear walls, energy-dissipating braces, etc. to form a frame-shear wall system or a frame-bracing system, which can be flexibly applied to multi-story and high-rise building systems.

[0072] While several specific implementation details are included in the foregoing discussion, these should not be construed as limiting the scope of this application. Certain features described in the context of individual embodiments may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented individually or in any suitable sub-combination in multiple implementations.

Claims

1. A high ductility double-yield energy dissipation link embedded with negative Poisson ratio energy dissipation panel, characterized in that, include: The coupling beam body has a negative Poisson ratio core plate embedded in it. The negative Poisson ratio core plate deforms under seismic action, triggering first-order energy dissipation. The first plate, several first plates are arranged at a certain gap on at least one side of the negative Poisson's ratio core plate, and one end of the first plate is fixed to the first end of the connecting beam body, and the other end is cantilevered. The second plate, comprising several second plates arranged at least on the same side of the negative Poisson's ratio core plate with a certain gap, is fixed at one end to the second end of the connecting beam body and cantilevered at the other end; and The first plate and the second plate are arranged alternately, with their cantilever ends extending into each other to form an overlap. Under seismic action, they make hard contact and squeeze each other, triggering second-order energy dissipation.

2. The high ductility dual yield point energy dissipation link of claim 1, wherein, The main body of the connecting beam is an I-beam or an H-beam, and the web of the I-beam or H-beam forms the negative Poisson's ratio core plate.

3. The high ductility dual yield point energy dissipation link of claim 2, wherein, The negative Poisson's ratio core plate has peanut-shaped holes arranged in an alternating horizontal and vertical array to create a negative Poisson's ratio effect.

4. The high ductility dual yield point energy dissipation link of claim 2, wherein, Weld end plates to both ends of I-beams or H-beams; Several end plates, one end of the first plate, are welded and fixed to the first end of the I-beam or H-beam; Several end plates of the second plate are welded and fixed at one end to the second end of the I-beam or H-beam.

5. The high ductility dual yield point energy dissipation link of claim 4, wherein, The end plate is provided with bolt holes for connection with pre-embedded bolts in the shear wall.

6. The high ductility dual yield point energy dissipation link of any one of claims 1 to 5, wherein, Several of the first plates are straight plates, and several of the second plates are folded plates; Furthermore, the bent end of each folded plate is cantilevered and faces the cantilever end of the corresponding straight plate.

7. The high ductility dual yield point energy dissipation link of claim 6, wherein, There is more than one straight plate than the folded plate.

8. The high ductility double yield energy dissipation link according to any one of claims 1 to 5, characterized in that, Several of the first plates are folded plates, and several of the second plates are folded plates; Furthermore, the bent end of each folded plate is cantilevered and faces the bent end of the corresponding folded plate, forming an interlocking state.

9. The high ductility dual yield point energy dissipation link of any one of claims 1 to 5, wherein, Several of the first plates are T-shaped plates, and several of the second plates are T-shaped plates; Furthermore, the bent end of each T-shaped plate is cantilevered and faces the bent end of the corresponding T-shaped plate, forming an interlocking state.

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