Negative Poisson's ratio steel plate shear wall structure with double-stage yield bearing energy dissipation

Abstract

The invention provides a negative Poisson's ratio steel plate shear wall structure capable of achieving dual-stage yield bearing energy dissipation. The negative Poisson's ratio steel plate shear wall structure mainly comprises steel columns, steel plates, steel plates and steel plates, a steel beam; the negative Poisson's ratio steel plate shear wall body is installed in a steel frame formed by the steel columns and the steel beams and comprises a first-order negative Poisson's ratio steel plate, a second-order negative Poisson's ratio steel plate and a third-order negative Poisson's ratio steel plate, the second-order negative Poisson's ratio buckling restrained steel plates are fixedly connected with the steel columns and the steel beams, and the two second-order negative Poisson's ratio buckling restrained steel plates are installed on the two sides of the first-order negative Poisson's ratio steel plates and fixedly connected with the first-order negative Poisson's ratio steel plates through tie bolt groups; the first-order negative Poisson's ratio steel plate can generate relative displacement relative to the first-order negative Poisson's ratio steel plate. The peanut-shaped opening design with the negative Poisson's ratio effect is adopted, meanwhile, the structural design concept of double-stage yield is combined, and the defects that in a traditional buckling constraint steel plate shear wall system, out-of-plane buckling happens too early, and energy consumption is insufficient are effectively overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, in particular to the technical field of structural engineering energy dissipation and vibration reduction, and specifically to a double-stage yielding, load-bearing and energy-dissipating negative Poisson's ratio steel plate shear wall structure. Background Art

[0002] With frequent natural disasters such as earthquakes, the seismic performance of building structures is crucial. Traditional buildings often suffer severe damage during earthquakes due to insufficient energy dissipation, which affects the safety and service life of the structure. Steel plate shear walls, as a highly effective seismic component, are widely used in building structures. They can effectively resist lateral forces and improve the overall stability of the building. However, traditional steel plate shear walls may experience a sharp drop in strength and stiffness after yielding, resulting in limited energy dissipation capacity during earthquakes. In addition, under heavy loads, the steel plates may buckle prematurely, weakening their load-bearing capacity and seismic performance.

[0003] The dual-yield point characteristic also plays a crucial role in structural seismic design. Traditional single-order yield structures exhibit relatively uniform mechanical property changes after yielding, making it difficult to provide sustained and efficient energy dissipation. However, structures with a dual-order yield mechanism can exhibit multiple yield points at different load stages, allowing components to undergo plastic deformation in stages, thereby improving the structure's energy dissipation capacity and enhancing its seismic resilience and stability.

[0004] While there has been some research and application in buckling restraint technology for steel plate shear walls, numerous challenges remain. Existing buckling restraints may not effectively suppress steel plate buckling under complex load conditions, or may increase the deadweight of the structure and construction complexity. Furthermore, research and application of buckling restraints incorporating the properties of novel materials is insufficient.

[0005] Therefore, this application designs a buckling-restrained steel plate shear wall with both negative Poisson's ratio and double-order yield characteristics, which is expected to overcome the shortcomings of existing steel plate shear walls and buckling restraint technologies, so as to improve the safety and reliability of building structures under complex loads such as earthquakes. Summary of the Invention

[0006] In response to the current defects, the present invention proposes a negative Poisson's ratio steel plate shear wall structure with double-stage yielding load-bearing and energy-dissipating properties, aiming to solve the problems of the prior art.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] A double-stage yielding load-bearing and energy-dissipating negative Poisson's ratio steel plate shear wall structure, the negative Poisson's ratio steel plate shear wall structure mainly includes:

[0009] Steel columns are I-shaped / H-shaped;

[0010] Steel beams are I-shaped / H-shaped;

[0011] The negative Poisson's ratio steel plate shear wall body is installed in the steel frame formed by the steel columns and the steel beams, and includes:

[0012] a first-order negative Poisson's ratio steel plate, connected and fixed to the steel column and the steel beam;

[0013] The second-order negative Poisson's ratio buckling restraint steel plate is connected and fixed to the steel column and the steel beam, and two second-order negative Poisson's ratio buckling restraint steel plates are installed on both sides of the first-order negative Poisson's ratio steel plate, and are connected and fixed to the first-order negative Poisson's ratio steel plate through a group of tie bolts, and can produce relative displacement relative to the first-order negative Poisson's ratio steel plate.

[0014] Preferably, the first-order negative Poisson's ratio steel plate is provided with peanut holes arranged in a horizontal and vertical alternating array.

[0015] Preferably, peanut holes arranged in a horizontally and vertically alternating array are provided on the second-order negative Poisson's ratio buckling restraint steel plate, and the peanut holes correspond one-to-one to the peanut holes on the first-order negative Poisson's ratio steel plate.

[0016] Preferably, the negative Poisson's ratio steel plate shear wall structure further includes a left vertical connecting angle steel and a right vertical connecting angle steel;

[0017] Two groups of left vertical connecting angle steels are clamped on the left edge of the first-order negative Poisson's ratio steel plate, one leg is connected and fixed to the steel column through a vertical steel column high-strength bolt group, and the other leg is connected and fixed to the first-order negative Poisson's ratio steel plate through a vertical steel plate high-strength bolt group;

[0018] The two groups of right vertical connecting angle steels are clamped on the right edge of the first-order negative Poisson's ratio steel plate, one limb is connected and fixed to the steel column through a vertical steel column high-strength bolt group, and the other limb is connected and fixed to the first-order negative Poisson's ratio steel plate through a vertical steel plate high-strength bolt group.

[0019] Preferably, one limb of the two groups of left vertical connecting angle steels connected to the steel column and one limb of the two groups of right vertical connecting angle steels connected to the steel column are provided with an oblong hole, and the other limb connected to the first-order negative Poisson's ratio steel plate is provided with a circular hole, and circular holes are provided on the left and right edges of the first-order negative Poisson's ratio steel plate accordingly.

[0020] Preferably, the negative Poisson's ratio steel plate shear wall structure further includes an upper horizontal connecting angle steel and a lower horizontal connecting angle steel;

[0021] Two groups of upper horizontal connecting angle steels are clamped on the upper edge of the first-order negative Poisson's ratio steel plate, one leg is connected and fixed to the steel beam through a group of horizontal steel beam high-strength bolts, and the other leg is connected and fixed to the first-order negative Poisson's ratio steel plate through a group of tie bolts;

[0022] The two groups of lower horizontal connecting angle steels are clamped at the lower edge of the first-order negative Poisson's ratio steel plate, one limb is connected and fixed to the ground beam through a group of horizontal ground beam high-strength bolts, and the other limb is connected and fixed to the first-order negative Poisson's ratio steel plate through a group of tie bolts.

[0023] Preferably, one limb of the two groups of upper horizontal connecting angle steels connected to the steel beam and one limb of the two groups of lower horizontal connecting angle steels connected to the ground beam are provided with an oblong hole, and the other limb connected to the first-order negative Poisson's ratio steel plate is provided with a circular hole, and the upper and lower edges of the first-order negative Poisson's ratio steel plate are provided with corresponding circular holes.

[0024] Preferably, the second-order negative Poisson's ratio buckling restraint steel plate is fixed relative to the bottom of the first-order negative Poisson's ratio steel plate, a first relative displacement occurs in the middle, and a second relative displacement occurs at the top.

[0025] Preferably, a row of circular holes is provided at the bottom of the second-order negative Poisson's ratio buckling restraint steel plate;

[0026] A group of tie bolts are passed through the circular holes to connect and fix the lower edge of the first-order negative Poisson's ratio steel plate and the two groups of lower horizontal connecting angle steels.

[0027] Preferably, a row of oblong holes 1 is provided in the middle of the second-order negative Poisson's ratio buckling restraint steel plate, and a row of oblong holes 2 is provided on the top;

[0028] A group of tie bolts are passed through the peanut hole and the oblong hole to connect and fix the first-order negative Poisson's ratio steel plate but not tighten;

[0029] A group of tie bolts are passed through the second oblong hole to connect and fix the upper edge of the first-order negative Poisson's ratio steel plate and the two groups of upper horizontal connecting angle steels but not tighten them.

[0030] Preferably, the second oblong hole is longer than the first oblong hole.

[0031] The negative Poisson's ratio steel plate shear wall structure provided by the present invention can be a single-layer or multi-layer structural system.

[0032] The present invention has the following advantages over the prior art: It provides a double-stage yielding, load-bearing, and energy-dissipating negative Poisson's ratio steel plate shear wall structure. This structure utilizes a peanut-shaped opening design with a negative Poisson's ratio effect, while incorporating the double-stage yielding structural design concept. This effectively overcomes the shortcomings of conventional buckling-restrained steel plate shear wall systems, such as premature out-of-plane buckling and insufficient energy dissipation. The advantages of the present invention are primarily manifested in the following aspects:

[0033] (1) Negative Poisson's ratio materials usually have good anti-buckling ability, and peanut-shaped openings can adjust the local stiffness distribution of the steel plate to avoid excessive buckling or damage in the local area of the steel plate. This design can effectively control the local buckling mode, so that the steel plate shear wall can maintain good stability and ductility when experiencing large loads, and is not prone to sudden yielding or damage, thereby enhancing its energy dissipation capacity when subjected to external forces. Through this special shape of opening, the lateral expansion effect of the negative Poisson's ratio material can be brought into play, further optimizing the plastic deformation mechanism of the structure, improving the ductility and durability of the steel plate, and maintaining stable performance under seismic loading. Under dynamic loads such as earthquakes, the structure can better convert external energy into its own deformation energy, effectively increase energy dissipation, and reduce the impact of earthquakes on the structure. In addition, the peanut-shaped opening design not only helps to improve the overall performance of the structure, but also can reduce the amount of steel plate without affecting the structural strength, thereby reducing the weight of the entire structure. Reducing material consumption also helps to save costs. This design makes the structure more economical while maintaining high performance.

[0034] (2) Traditional steel plate shear walls usually adopt a single yield stage and may quickly enter a fully plastic stage after being subjected to stress, resulting in local buckling and deformation. The dual-stage yield characteristic enables the structure to gradually dissipate energy after experiencing two different yield stages, rather than just entering a fully plastic stage after a single yield point. After the first yield point, the structure begins to dissipate energy through a certain amount of plastic deformation, and when it reaches the second yield point, a new energy dissipation mechanism is activated, which can continuously dissipate energy under different load levels. It has a stronger energy dissipation capacity than a single yield point structure and can better protect the safety of the structure under complex loads such as strong earthquakes. It enables the structure to produce greater plastic deformation without sudden failure during the two yield stages, greatly improving the ductility of the structure.

[0035] (3) Traditional steel plate shear walls are prone to buckling failure under horizontal loads, especially thin steel plates are more prone to stability problems. The negative Poisson's ratio buckling-resistance shear wall design proposed in this study achieves the unity of lightweight and anti-buckling performance through the negative Poisson's ratio effect of the material itself. Compared with traditional buckling-restrained shear walls that require additional structural measures, this design utilizes the lateral expansion characteristics of negative Poisson's ratio materials when compressed to naturally form a self-restraint mechanism, which not only avoids the shortcomings of the complex structure of traditional shear walls, but also ensures the stability of the structure during the load-bearing process. Through this innovative design, the coordinated improvement of structural lightweight and seismic performance is achieved, providing a new seismic solution with simple structure and reliable performance for modern building structures.

[0036] It should be understood that the implementation of any embodiment of the present invention does not mean that multiple or all of the above-mentioned beneficial effects must be possessed or achieved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0038] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons skilled in the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, provided they do not affect the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0039] Figure 1 An overall three-dimensional schematic diagram of a double-stage yielding load-bearing and energy-dissipating negative Poisson's ratio steel plate shear wall structure is shown as an example;

[0040] Figure 2 A front view of a negative Poisson's ratio steel plate shear wall structure with double-stage yielding and energy dissipation is shown as an example;

[0041] Figure 3 An exploded diagram of a negative Poisson's ratio steel plate shear wall structure with double-stage yielding and energy dissipation is shown as an example;

[0042] Figure 4 A schematic diagram of a steel frame of a negative Poisson's ratio steel plate shear wall structure with double-stage yielding load bearing and energy dissipation is shown as an example;

[0043] Figure 5 A front view of a first-order negative Poisson's ratio steel plate of a double-stage yielding load-bearing and energy-dissipating negative Poisson's ratio steel plate shear wall structure is shown as an example;

[0044] Figure 6 A front view of a second-order negative Poisson's ratio buckling restrained steel plate of a negative Poisson's ratio steel plate shear wall structure with double-stage yielding and energy dissipation is shown as an example;

[0045] Figure 7 A schematic diagram of the connection angle steel of a negative Poisson's ratio steel plate shear wall structure with double-stage yielding load bearing and energy dissipation is shown as an example.

[0046] Markings in the figure:

[0047] Negative Poisson's ratio steel plate shear wall structure 100;

[0048] Steel column 1, circular hole 11;

[0049] Steel beam 2, circular hole 21;

[0050] Negative Poisson's ratio steel plate shear wall body 3;

[0051] Ground beam 4, circular hole 41;

[0052] First-order negative Poisson's ratio steel plate 5, circular hole 51, circular hole 52;

[0053] Second-order negative Poisson's ratio buckling restrained steel plate 6, circular hole 61, oblong hole 1 62, oblong hole 2 63;

[0054] Left vertical connecting angle steel 7, through hole 71, circular hole 72;

[0055] Right vertical connecting angle steel 8, through hole 81, circular hole 82;

[0056] Upper horizontal connecting angle steel 9, through hole 91, circular hole 92;

[0057] Lower horizontal connecting angle steel 10, through hole 101, round hole 102;

[0058] Vertical steel column high-strength bolt group 12, vertical steel plate high-strength bolt group 13, horizontal steel beam high-strength bolt group 14, horizontal ground beam high-strength bolt group 15, and tie bolt group 16.

[0059] In the various drawings, the same or corresponding reference numerals denote the same or corresponding parts. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in conjunction with the embodiments and drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0061] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0062] It should be understood that the terms "comprises / comprising," "consisting of," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product, apparatus, process, or method that includes a list of elements includes not only those elements but also, if necessary, other elements not explicitly listed, or elements inherent to such product, apparatus, process, or method. In the absence of further limitations, elements defined by the phrases "comprises / comprising," "consisting of," do not preclude the presence of additional identical elements in the product, apparatus, process, or method that includes the elements.

[0063] It should also be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a specific direction, be constructed or operate in a specific direction, and should not be understood as limiting the present invention.

[0064] 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 the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0065] Traditional prefabricated buckling-restrained steel plate shear walls typically suffer from poor ductility and the design limitations of a single yield point. In contrast, the dual-yield point steel plate shear wall design can adjust its energy absorption mechanism based on changes in earthquake magnitude, providing greater flexibility to accommodate seismic loads of varying magnitudes. This dual-yield point structure leverages the lower yield point during milder vibrations while providing additional energy absorption capacity through the higher yield point during stronger vibrations, enhancing the overall seismic performance and durability of the structure.

[0066] Poisson's ratio is an important parameter for measuring the mechanical properties of materials. Typically, a material's Poisson's ratio is positive, meaning that when subjected to axial tension or compression, the material will contract or expand laterally, respectively. In contrast, materials with negative Poisson's ratios exhibit the opposite properties of conventional materials: they expand laterally when subjected to tension and contract laterally when subjected to compression. This property enables them to provide better deformation coordination and stability under load, potentially improving the buckling resistance and energy dissipation performance of structural components.

[0067] Based on this, the present invention proposes a negative Poisson's ratio steel plate shear wall structure with double-stage yielding load-bearing and energy-dissipating properties. To address the current problems of easy buckling and single load-bearing and energy-dissipating properties of steel plate shear walls, the negative Poisson's ratio structural design concept and double-stage yielding structural design are adopted to optimize and improve the above problems.

[0068] The specific implementation and preferred solution of the double-stage yielding load-bearing and energy-dissipating negative Poisson's ratio steel plate shear wall structure proposed by the present invention are described in detail below.

[0069] Overall Figure 1-7 As shown, a negative Poisson's ratio steel plate shear wall structure with double-stage yielding load-bearing and energy dissipation is shown. The negative Poisson's ratio steel plate shear wall structure 100 mainly includes: a steel column 1, a steel beam 2, and a negative Poisson's ratio steel plate shear wall body 3, wherein the steel column 1 is I-shaped or H-shaped, and the steel beam 2 is I-shaped or H-shaped. The negative Poisson's ratio steel plate shear wall body 3 is installed in the steel frame formed by the steel column 1 and the steel beam 2, thus forming a negative Poisson's ratio steel plate shear wall structure with double-stage yielding load-bearing and energy dissipation.

[0070] In the present invention, see specifically Figure 3 、 Figure 5 、 Figure 6 The negative Poisson's ratio steel plate shear wall body 3 is mainly composed of a first-order negative Poisson's ratio steel plate 5 and a second-order negative Poisson's ratio buckling restraint steel plate 6, thus forming a two-stage yield structural design.

[0071] It is easy to understand that the first-order negative Poisson's ratio steel plate 5 has a negative Poisson's ratio characteristic and serves as a first-stage buckling energy dissipation structure. The second-order negative Poisson's ratio buckling restraint steel plate 6 also has a negative Poisson's ratio characteristic and serves as a second-stage buckling energy dissipation structure and a buckling restraint structure of the first-order negative Poisson's ratio steel plate 5 to solve the current problems of easy buckling and single load-bearing energy consumption of steel plate shear walls.

[0072] Specifically, the steel frame is formed by welding steel columns 1, steel beams 2, and ground beams 4 (or foundations). Beam-column node stiffeners are welded at the beam-column connections. These stiffeners consist of two rectangular plates welded to the flanges of steel column 1 on either side, reinforcing the beam-column node area through welding. Within the steel frame, first-order negative Poisson's ratio steel plates 5 are fixed to the steel columns 1 on the left and right, and to the steel beams 2 on the top and bottom. It should be noted that for the bottom floor of a single-story or multi-story structure, the shear wall is formed by the steel beams 2 at the top and the ground beams 4 (or foundations) at the bottom. In this case, the first-order negative Poisson's ratio steel plates 5 are fixed to the steel beams 2 at the top and to the ground beams 4 (or foundations) at the bottom. For the upper floor of a multi-story structure, the shear wall is formed by the steel beams 2 at the top and bottom. In this case, the first-order negative Poisson's ratio steel plates 5 are fixed to the steel beams 2 at the top and bottom.

[0073] Two second-order negative Poisson's ratio buckling restraint steel plates 6 are installed on either side of the first-order negative Poisson's ratio steel plate 5. The two second-order negative Poisson's ratio buckling restraint steel plates 6 are not only connected and fixed to the steel column 1 and the steel beam 2, but are also connected and fixed to the first-order negative Poisson's ratio steel plate 5 through the tie bolt group 16, and can produce relative displacement relative to the first-order negative Poisson's ratio steel plate 5. Under the action of an earthquake, the first-order negative Poisson's ratio steel plate 5 acts as the first line of seismic defense to dissipate energy by buckling, while the second-order negative Poisson's ratio buckling restraint steel plate 6 acts as the second line of seismic defense to dissipate energy by buckling. They must not only play a buckling prevention role but also ensure sufficient bearing capacity. When the first-order negative Poisson's ratio steel plate 5 and the second-order negative Poisson's ratio buckling restraint steel plate 6 undergo irreversible plastic deformation after the earthquake, they can be quickly replaced by simply removing the tie bolt group 16 and then the remaining bolt groups. This achieves dual-order yield energy dissipation while enabling quick replacement and repair, ensuring the recoverability of the structural system.

[0074] In some embodiments, see, inter alia, Figure 1-4 、 Figure 7 The negative Poisson's ratio steel plate shear wall structure 100 also includes a left vertical connection angle steel 7 and a right vertical connection angle steel 8. It is easy to understand that the vertical connection angle steel has two limbs, which are strip-shaped angle steels (or L-shaped steel plates). The two groups of left vertical connection angle steels 7 are clamped on the left edge of the first-order negative Poisson's ratio steel plate 5 from both sides in a back-to-back manner, one limb is attached to the flange of the steel column 1 and is connected and fixed to the steel column 1 through a vertical steel column high-strength bolt group 12, and the other limb is attached to the first-order negative Poisson's ratio steel plate 5 and is connected and fixed through a vertical steel plate high-strength bolt group 13; the two groups of right vertical connection angle steels 8 are also clamped on the right edge of the first-order negative Poisson's ratio steel plate 5 from both sides in a back-to-back manner, one limb is attached to the flange of the steel column 1 and is connected and fixed to the steel column 1 through a vertical steel column high-strength bolt group 12, and the other limb is attached to the first-order negative Poisson's ratio steel plate 5 and is connected and fixed through a vertical steel plate high-strength bolt group 13.

[0075] Specifically, two rows of circular holes 11 are vertically opened on the flange of the inward side of the steel column 1, and the two rows of circular holes 11 are symmetrically arranged with the web of the steel column 1. A through hole 71 is opened on one limb of the two groups of left vertical connecting angle steels 7 connected to the steel column 1, and two groups of vertical steel column high-strength bolts 12 are passed through the through hole 71 to connect and fix with the two rows of circular holes 11 on the flange of the left steel column 1. Similarly, a through hole 81 is opened on one limb of the two groups of right vertical connecting angle steels 8 connected to the steel column 1, and two groups of vertical steel column high-strength bolts 12 are passed through the through hole 81 to connect and fix with the two rows of circular holes 11 on the flange of the right steel column 1. In this way, the first-order negative Poisson's ratio steel plate 5 is connected and fixed to the steel columns 1 on both sides.

[0076] At the same time, the other limbs of the two groups of left vertical connecting angle steels 7 connected to the first-order negative Poisson's ratio steel plate 5 are provided with circular holes 72, and the other limbs of the two groups of right vertical connecting angle steels 8 connected to the first-order negative Poisson's ratio steel plate 5 are provided with circular holes 82. The left and right edges of the first-order negative Poisson's ratio steel plate 5 are also provided with a row of circular holes 51. The left side is connected and fixed by a group of vertical steel plate high-strength bolts 13 passing through the circular holes 51 and the circular holes 72, and the right side is connected and fixed by a group of vertical steel plate high-strength bolts 13 passing through the circular holes 51 and the circular holes 82. In this way, the left and right sides of the first-order negative Poisson's ratio steel plate 5 are connected and fixed to the steel columns 1 on both sides. It should be noted that the vertical steel plate high-strength bolts 13 are tightened according to the designed preload (i.e., preload is applied); all connecting angle steels in this part are first connected on one side of the first-order negative Poisson's ratio steel plate 5, and the connecting angle steels on the other side are connected after the first-order negative Poisson's ratio steel plate 5 is installed.

[0077] In some embodiments, see Figure 1-4 、 Figure 7 The negative Poisson's ratio steel plate shear wall structure 100 also includes an upper horizontal connecting angle steel 9 and a lower horizontal connecting angle steel 10. Similar to the left vertical connecting angle steel 7 and the right vertical connecting angle steel 8, the horizontal connecting angle steel adopts a strip angle steel (or L-shaped steel plate), and the angle steel has two limbs. The two groups of upper horizontal connecting angle steels 9 are clamped on the upper edge of the first-order negative Poisson's ratio steel plate 5 from both sides in a back-to-back manner, one limb is attached to the lower flange of the steel beam 2 and is connected and fixed to the steel beam 2 through a horizontal steel beam high-strength bolt group 14, and the other limb is attached to the first-order negative Poisson's ratio steel plate 5 and is connected and fixed through a tie bolt group 16; the two groups of lower horizontal connecting angle steels 10 are also clamped on the lower edge of the first-order negative Poisson's ratio steel plate 5 from both sides in a back-to-back manner, one limb is attached to the upper flange of the ground beam 4 and is connected and fixed to the ground beam 4 through a horizontal ground beam high-strength bolt group 15, and the other limb is attached to the first-order negative Poisson's ratio steel plate 5 and is connected and fixed through a tie bolt group 16.

[0078] Specifically, two rows of circular holes 21 are provided on the lower flange of the inward side of the steel beam 2, and the two rows of circular holes 21 are symmetrically arranged with the web of the steel beam 2. Through holes 91 are provided on one limb of the two groups of upper horizontal connecting angle steels 9 connected to the steel beam 2, and two groups of horizontal steel beam high-strength bolt groups 14 are passed through the through holes 91 to connect and fix with the two rows of circular holes 21 on the flange of the steel beam 2. Similarly, two rows of circular holes 41 are provided on the upper flange of the inward side of the ground beam 4, and the two rows of circular holes 41 are symmetrically arranged with the web of the ground beam 4. Through holes 101 are provided on one limb of the two groups of lower horizontal connecting angle steels 10 connected to the ground beam 4, and two groups of horizontal ground beam high-strength bolt groups 15 are passed through the through holes 101 to connect and fix with the two rows of circular holes 41 on the flange of the ground beam 4. In this way, the first-order negative Poisson's ratio steel plate 5 is connected and fixed to the steel beam 2 and the ground beam 4.

[0079] At the same time, a circular hole 92 is opened on the other limb of the two groups of upper horizontal connecting angle steels 9 connected to the first-order negative Poisson's ratio steel plate 5, and a circular hole 102 is opened on the other limb of the two groups of lower horizontal connecting angle steels 10 connected to the first-order negative Poisson's ratio steel plate 5. The upper and lower edges of the first-order negative Poisson's ratio steel plate 5 also have a row of circular holes 52 respectively opened. The upper part is connected and fixed by a group of tie bolts 16 passing through the circular holes 52 and the circular holes 92, and the lower part is connected and fixed by a group of tie bolts 16 passing through the circular holes 52 and the circular holes 102. In this way, the upper part of the first-order negative Poisson's ratio steel plate 5 is connected and fixed to the steel beam 2, and the lower part is connected and fixed to the ground beam 4.

[0080] In the embodiment of the present invention, the four sides of the first-order negative Poisson's ratio steel plate 5 are connected and fixed to the steel column 1, steel beam 2 and ground beam 4 by connecting angle steel and high-strength bolt group, which is convenient for on-site disassembly, replacement and maintenance without welding. After earthquake buckling, only the high-strength bolt group needs to be removed for replacement.

[0081] Preferably, the through holes 71 defined at one end of the two sets of left vertical angle steel connections 7 connecting to the steel column 1, and the through holes 81 defined at one end of the two sets of right vertical angle steel connections 8 connecting to the steel column 1, are preferably oblong holes to reduce installation errors. Similarly, the through holes 91 defined at one end of the two sets of upper horizontal angle steel connections 9 connecting to the steel beam 2, and the through holes 101 defined at one end of the two sets of lower horizontal angle steel connections 10 connecting to the ground beam 4, are also oblong holes to reduce installation errors.

[0082] like Figure 5 As shown, the four corners of the first-order negative Poisson's ratio steel plate 5 are cut into quarter circles to avoid stress concentration at the corners. The length of each connecting angle steel is the same or approximately the same as the length of the quarter circle cut out of each side of the first-order negative Poisson's ratio steel plate 5 to match the same bolt hole arrangement.

[0083] Continue to see Figure 5The first-order negative Poisson's ratio steel plate 5 is set according to the shape of the wall panel. The figure shows a square steel plate. The square steel plate is provided with peanut holes arranged in a horizontal and vertical array to form a weakened area to produce a negative Poisson's ratio effect. The peanut holes are arranged in a horizontal and vertical array in the weakened area, that is, one horizontal and one vertical, and the array is arranged in multiple rows and columns. In the same row, a horizontal peanut hole alternates with a vertical peanut hole, and in the same column, a vertical peanut hole alternates with a horizontal peanut hole. By designing a peanut hole weakening method and designing a reasonable opening ratio, a lightweight design is carried out to achieve the effect of reducing the deadweight. At the same time, the negative Poisson's ratio effect of the component is realized, so that the component exhibits the characteristics of lateral contraction when subjected to stress, thereby avoiding the buckling instability problem caused by lateral expansion in traditional structures, effectively increasing the critical buckling load, alleviating out-of-plane buckling, and achieving a buckling-free effect. At the same time, the negative Poisson's ratio characteristic makes the component have stronger ductility, improves the ductility and durability of the component, and can maintain stable performance under multiple earthquake loads. Furthermore, this characteristic optimizes the energy dissipation mechanism, enhancing the structure's energy absorption and seismic resistance under extreme loads. This design gives the structure greater deformability, allowing it to absorb more energy through plastic deformation during strong earthquakes, thus enhancing its seismic resistance and durability.

[0084] The porosity of the peanut hole is determined according to the design requirements. If the porosity is too small, the negative Poisson's ratio effect is difficult to reflect. If the porosity is too large, the structural strength is difficult to ensure. Studies have shown that an opening rate of 40-50% is appropriate, that is, a solid rate of 50-60% is a reasonable range.

[0085] Of course, in addition to peanut holes, elliptical holes, star-shaped holes, etc. can also be used to make the inner core have negative Poisson's ratio characteristics.

[0086] In some embodiments, as Figure 6 As shown, the second-order negative Poisson's ratio buckling restraint steel plate 6 also adopts a square steel plate, and peanut holes arranged in a horizontal and vertical array are provided on the square steel plate, and the peanut holes can correspond one-to-one with the peanut holes on the first-order negative Poisson's ratio steel plate 5, that is, the peanut holes on the second-order negative Poisson's ratio buckling restraint steel plate 6 have corresponding peanut holes on the first-order negative Poisson's ratio steel plate 5, so as to facilitate the subsequent insertion of the tie bolt group 16 through the peanut holes, but it does not mean that the peanut holes of the two are exactly the same.

[0087] Furthermore, the second-order negative Poisson's ratio buckling restraint steel plate 6 is fixed relative to the bottom of the first-order negative Poisson's ratio steel plate 5, and a first relative displacement occurs in the middle and a second relative displacement occurs at the top. In this way, the first-order negative Poisson's ratio steel plate 5 is restrained from buckling by fixing at the bottom, and when subjected to force, the first-order negative Poisson's ratio steel plate 5 is first subjected to shear force and undergoes a first-stage yield energy dissipation. As the horizontal displacement increases, the second-order negative Poisson's ratio buckling restraint steel plate 6 produces a relative displacement. When the displacement limit is reached, a second-stage yield energy dissipation occurs. It should be noted that the first relative displacement and the second relative displacement can be the same or different. The preferred design has a larger second relative displacement, that is, a larger allowable displacement at the top, which will be explained in detail later.

[0088] Furthermore, the second-order negative Poisson's ratio buckling restraint steel plate 6 has a row of circular holes 61 at its bottom, a row of oblong holes 1 62 at its middle, and a row of oblong holes 2 63 at its top. Three corresponding groups of tie bolts 16 are provided, securing the second-order negative Poisson's ratio buckling restraint steel plate 6 to the first-order negative Poisson's ratio steel plate 5 at its bottom, middle, and top, respectively. This design adjusts the sizes of the circular holes 61 at its bottom, the oblong holes 1 62 at its middle, and the oblong holes 2 63 at its top to adjust the timing of the shear wall entering the second-stage yield at different interstory drift angles, thereby achieving the dual-stage yield characteristics of the negative Poisson's ratio steel plate shear wall body 3.

[0089] The specific installation of the tie bolt group 16 is as follows:

[0090] The lower part of the second-order negative Poisson's ratio buckling restraint steel plate 6 is connected and fixed to the lower edge of the first-order negative Poisson's ratio steel plate 5 and two groups of lower horizontal connecting angles 10 through a group of tie bolts 16. Specifically, the tie bolts 16 pass through the circular holes 61, 102, and 52 on one side and the circular holes 102 and 61 on the other side in sequence, connecting the two second-order negative Poisson's ratio buckling restraint steel plates 6 to the periphery of the first-order negative Poisson's ratio steel plate 5, and at the same time connecting and fixing them together with the two groups of lower horizontal connecting angles 10.

[0091] The middle part of the second-order negative Poisson's ratio buckling restraint steel plate 6 is connected and fixed to the first-order negative Poisson's ratio steel plate 5 through a group of tie bolts 16. Specifically, the tie bolts 16 pass through the oblong hole 62 on one side, the peanut hole and the oblong hole 62 on the other side in sequence, connecting the two second-order negative Poisson's ratio buckling restraint steel plates 6 to the periphery of the first-order negative Poisson's ratio steel plate 5.

[0092] The top of the second-order negative Poisson's ratio buckling restraint steel plate 6 is connected and fixed to the upper edge of the first-order negative Poisson's ratio steel plate 5 and two groups of upper horizontal connecting angles 9 through a group of tie bolts 16. Specifically, a group of tie bolts 16 passes through the oblong hole 2 63, circular hole 92, circular hole 52 on one side and the circular hole 92, oblong hole 2 63 on the other side in sequence, connecting the two second-order negative Poisson's ratio buckling restraint steel plates 6 to the periphery of the first-order negative Poisson's ratio steel plate 5, and at the same time connecting and fixing them together with the two groups of upper horizontal connecting angles 9.

[0093] It is easy to understand that in the present invention, the four sides of the first-order negative Poisson's ratio steel plate 5 are connected to the frame (via Figure 5 The circular holes 51 and 52 in the figure are shown in Figure 5. The first-order negative Poisson's ratio steel plate 5 serves as the first line of defense against earthquakes. The geometric parameters and array parameters of its peanut-shaped openings can be adjusted according to the actual needs of the project. The first-order negative Poisson's ratio steel plate 5 can be considered as a traditional connection method between the steel plate and the edge. It begins to deform and dissipate energy when it is subjected to shear force. The second-order negative Poisson's ratio buckling restraint steel plate 6 is installed on both sides of the first-order negative Poisson's ratio steel plate 5 through a group of tie bolts 16 (through Figure 6 The second-order negative Poisson's ratio buckling restraint steel plate 6 (center circular hole 61, oblong hole 1 62, oblong hole 2 63) serves as the second line of defense against seismic shocks, requiring both buckling prevention and sufficient load-bearing capacity. Therefore, the arrangement of the peanut-shaped openings needs to be adjusted according to design requirements. Furthermore, unlike the preload applied by the high-strength bolt group 13 on the vertical steel plate, the tie bolt group 16 does not apply a preload to oblong holes 1 62 and 63, meaning it is not tightened (there are no special requirements for circular hole 61; it can be tightened or not). It only provides out-of-plane restraint, ensuring relative displacement between the first and second orders. When subjected to stress, as the horizontal load is applied, the first-order negative Poisson's ratio steel plate 5 will always be subjected to shear force. As the horizontal displacement increases, the tie bolt group 16 will move along with the peanut hole of the first-order negative Poisson's ratio steel plate 5. When the tie bolt group 16 hits the oblong hole of the second-order negative Poisson's ratio buckling restraint steel plate 6, the second-order negative Poisson's ratio buckling restraint steel plate 6 will produce displacement.

[0094] The length of the oblong hole of the second-order negative Poisson's ratio buckling restraint steel plate 6 controls its starting displacement when it begins to bear shear force. When the tie bolt group 16 hits the oblong hole of the second-order negative Poisson's ratio buckling restraint steel plate 16, it begins to bear shear force, deform and consume energy.

[0095] Because the inter-story drift angle is equal to horizontal displacement / inter-story height, and from top to bottom, height is positively correlated with horizontal displacement, the preferred design is for the second oblong hole 63 to be longer than the first oblong hole 62, ensuring that the tie bolt group 16 simultaneously acts on the second-order negative Poisson's ratio buckling restraint steel plate 6.

[0096] The number of openings connecting all the connecting angle steels with the steel column 1, steel beam 2, and ground beam 4 (foundation) needs to take into account the design bearing capacity, so that the first-order negative Poisson's ratio steel plate 5 and the second-order negative Poisson's ratio buckling restraint steel plate 6 can fully undergo plastic deformation without deformation of the connecting angle steel, thereby improving the energy dissipation capacity of the structure, rather than buckling or failure at the connecting angle steel.

[0097] The working principle of the negative Poisson's ratio steel plate shear wall structure 100 of the present invention can be understood as follows:

[0098] Under small earthquakes, the structure remains elastic;

[0099] Under moderate earthquake action, the first-order negative Poisson's ratio steel plate 5 undergoes in-plane plastic deformation and dissipates energy. This is because the steel plate with the peanut-shaped opening has good anti-buckling performance, which avoids premature out-of-plane buckling.

[0100] Under a strong earthquake, the first-order negative Poisson's ratio steel plates 5 begin to buckle. However, the second-order negative Poisson's ratio buckling restraint steel plates 6 activate, providing relative out-of-plane restraint for the first-order negative Poisson's ratio steel plates 5 and enhancing their energy dissipation capacity. Furthermore, the second-order negative Poisson's ratio buckling restraint steel plates 6 themselves undergo plastic deformation under strong earthquakes, providing secondary stiffness and energy dissipation capacity to the structure, thereby enhancing the overall seismic performance of the structure.

[0101] Although several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present invention. Certain features described in the context of separate 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 in multiple implementations individually or in any suitable sub-combination.

Claims

1. A double-stage yielding, load-bearing and energy-dissipating negative Poisson's ratio steel plate shear wall structure, characterized in that: The negative Poisson's ratio steel plate shear wall structure mainly includes: Steel columns are I-shaped / H-shaped; Steel beams are I-shaped / H-shaped; The negative Poisson's ratio steel plate shear wall body is installed in the steel frame formed by the steel columns and the steel beams, and includes: a first-order negative Poisson's ratio steel plate, connected and fixed to the steel column and the steel beam; The second-order negative Poisson's ratio buckling restraint steel plate is connected and fixed to the steel column and the steel beam, and two second-order negative Poisson's ratio buckling restraint steel plates are installed on both sides of the first-order negative Poisson's ratio steel plate, and are connected and fixed to the first-order negative Poisson's ratio steel plate through a group of tie bolts, and can produce relative displacement relative to the first-order negative Poisson's ratio steel plate.

2. The negative Poisson's ratio steel plate shear wall structure according to claim 1, characterized in that: The first-order negative Poisson's ratio steel plate is provided with peanut holes arranged in a horizontal and vertical alternating array; The second-order negative Poisson's ratio buckling restraint steel plate is provided with peanut holes arranged in a horizontal and vertical array, and the peanut holes correspond one-to-one to the peanut holes on the first-order negative Poisson's ratio steel plate.

3. The negative Poisson's ratio steel plate shear wall structure according to claim 1, characterized in that: The negative Poisson's ratio steel plate shear wall structure further includes a left vertical connection angle steel and a right vertical connection angle steel; Two groups of left vertical connecting angle steels are clamped on the left edge of the first-order negative Poisson's ratio steel plate, one leg is connected and fixed to the steel column through a vertical steel column high-strength bolt group, and the other leg is connected and fixed to the first-order negative Poisson's ratio steel plate through a vertical steel plate high-strength bolt group; The two groups of right vertical connecting angle steels are clamped on the right edge of the first-order negative Poisson's ratio steel plate, one limb is connected and fixed to the steel column through a vertical steel column high-strength bolt group, and the other limb is connected and fixed to the first-order negative Poisson's ratio steel plate through a vertical steel plate high-strength bolt group.

4. The negative Poisson's ratio steel plate shear wall structure according to claim 3, characterized in that: One limb of the two groups of left vertical connecting angle steels connected to the steel column and one limb of the two groups of right vertical connecting angle steels connected to the steel column are provided with an oblong hole, and the other limb connected to the first-order negative Poisson's ratio steel plate is provided with a circular hole, and circular holes are provided on the left and right edges of the first-order negative Poisson's ratio steel plate accordingly.

5. The negative Poisson's ratio steel plate shear wall structure according to claim 2, characterized in that: The negative Poisson's ratio steel plate shear wall structure further includes an upper horizontal connecting angle steel and a lower horizontal connecting angle steel; Two groups of upper horizontal connecting angle steels are clamped on the upper edge of the first-order negative Poisson's ratio steel plate, one leg is connected and fixed to the steel beam through a group of horizontal steel beam high-strength bolts, and the other leg is connected and fixed to the first-order negative Poisson's ratio steel plate through a group of tie bolts; The two groups of lower horizontal connecting angle steels are clamped at the lower edge of the first-order negative Poisson's ratio steel plate, one limb is connected and fixed to the ground beam through a group of horizontal ground beam high-strength bolts, and the other limb is connected and fixed to the first-order negative Poisson's ratio steel plate through a group of tie bolts.

6. The negative Poisson's ratio steel plate shear wall structure according to claim 5, characterized in that: One limb of the two groups of upper horizontal connecting angle steels connected to the steel beam and one limb of the two groups of lower horizontal connecting angle steels connected to the ground beam are provided with oblong holes, and the other limb connected to the first-order negative Poisson's ratio steel plate is provided with a circular hole, and circular holes are provided correspondingly on the upper and lower edges of the first-order negative Poisson's ratio steel plate.

7. The negative Poisson's ratio steel plate shear wall structure according to claim 5, characterized in that: The second-order negative Poisson's ratio buckling restraint steel plate is fixed relative to the bottom of the first-order negative Poisson's ratio steel plate, a first relative displacement occurs in the middle, and a second relative displacement occurs at the top.

8. The negative Poisson's ratio steel plate shear wall structure according to claim 7, characterized in that: A row of circular holes is provided at the bottom of the second-order negative Poisson's ratio buckling restraint steel plate; A group of tie bolts are passed through the circular holes to connect and fix the lower edge of the first-order negative Poisson's ratio steel plate and the two groups of lower horizontal connecting angle steels.

9. The negative Poisson's ratio steel plate shear wall structure according to claim 7, characterized in that: A row of oblong holes 1 is provided in the middle of the second-order negative Poisson's ratio buckling restraint steel plate, and a row of oblong holes 2 is provided on the top; A group of tie bolts are passed through the peanut hole and the oblong hole to connect and fix the first-order negative Poisson's ratio steel plate but not tighten; A group of tie bolts are passed through the second oblong hole to connect and fix the upper edge of the first-order negative Poisson's ratio steel plate and the two groups of upper horizontal connecting angle steels but not tighten them.

10. The negative Poisson's ratio steel plate shear wall structure according to claim 9, characterized in that: The second oblong hole is longer than the first oblong hole.

Images