Self-resetting assembly type steel frame shear wall structure system provided with self-resetting supporting units and negative Poisson's ratio energy dissipation steel plates

Abstract

The invention provides a self-resetting assembly type steel frame shear wall structure system provided with self-resetting supporting units and negative poisson ratio energy dissipation steel plates. The self-resetting assembly type steel frame shear wall structure system mainly comprises steel columns; a steel beam; the negative Poisson's ratio energy dissipation steel plate shear wall is installed in a steel frame formed by the steel columns and the steel beams and comprises negative Poisson's ratio energy dissipation steel plates fixedly connected with the steel columns and the steel beams. The two sets of self-resetting supporting units are symmetrically arranged on the two sides of the negative poisson ratio energy dissipation steel plate shear wall, the two ends of each self-resetting supporting unit are fixedly connected to the two opposite corners of the steel frame, and each self-resetting supporting unit comprises two pieces of I-shaped steel, the inner ends of the two pieces of I-shaped steel are in butt joint through a self-resetting connecting device; the outer ends of the self-resetting connecting devices are fixedly connected with the corners of the steel column and the steel beam through supporting connecting pieces, and when the self-resetting connecting devices are stressed, the self-resetting connecting devices can generate axial displacement and provide resetting force. The self-resetting capacity of the shear wall can be improved, residual deformation is reduced, the energy dissipation capacity of the shear wall is improved, damage to a main body structure is reduced, and the durability of the shear wall is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, especially the technical field of energy dissipation and vibration reduction in structural engineering. Specifically, it relates to a self-centering prefabricated steel frame shear wall structure system configured with a self-centering support unit and a negative Poisson's ratio energy dissipation steel plate. Background Art

[0002] In the face of strong earthquakes, traditional structural seismic design methods often struggle to effectively protect the safety of structures, internal personnel, and equipment. To improve the safety and reliability of buildings during earthquakes, more advanced seismic technologies and structural systems need to be developed. The steel self-centering energy dissipation shear wall emerged under such circumstances. During an earthquake, it can dissipate seismic energy through its own energy dissipation mechanism, reducing the seismic response of the structure. After the structure deforms, the self-centering device can, relying on its own mechanical properties, restore the structural components to their initial positions or close to the initial positions, effectively reducing the residual deformation of the structure, maintaining the overall stability and service function of the structure, and thus protecting the main body safety of the structure.

[0003] However, traditional steel shear wall design methods rely on the plastic deformation of the wall itself to dissipate seismic energy, resulting in concentrated damage to the main structure and difficulty in post-earthquake repair. Under strong earthquakes, it is prone to overall buckling or local tearing, losing its bearing capacity. The residual deformation of the shear force in traditional design methods is significant. After the steel undergoes plastic deformation, it cannot automatically return to its original position, leading to the loss of building functions and damage results such as wall tilting and pipeline fracture. The steel shear walls designed by traditional methods have low energy dissipation efficiency. The energy dissipation mainly relies on the ductility of the steel itself, and it is prone to fatigue failure under repeated loads, and the energy dissipation capacity decreases with the number of cycles. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention proposes a self-centering prefabricated steel frame shear wall structure system configured with a self-centering support unit and a negative Poisson's ratio energy dissipation steel plate to improve the self-centering ability of the shear wall, reduce the residual deformation, enhance the energy dissipation capacity of the shear wall, reduce the damage to the main structure, enhance the durability of the shear wall, and provide more options for replaceable metal shear walls and frame supports.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A self-centering prefabricated steel frame shear wall structure system configured with a self-centering support unit and a negative Poisson's ratio energy dissipation steel plate, which mainly includes:

[0007] Steel columns, in the shape of I-beam / H-beam;

[0008] Steel beams, in the shape of I-beam / H-beam;

[0009] A negative Poisson's ratio energy-dissipating steel plate shear wall is installed within a steel frame formed by the steel columns and the steel beams, and includes:

[0010] A negative Poisson's ratio energy-dissipating steel plate, which is connected and fixed to the steel columns and steel beams;

[0011] Self-centering support units. Two groups of the self-centering support units are symmetrically arranged on both sides of the negative Poisson's ratio energy-dissipating steel plate shear wall, and the two ends are connected and fixed to two diagonal corners of the steel frame, and include:

[0012] Two I-shaped steel bars are butt-connected at the inner ends through a self-centering connection device, and are connected and fixed to the corners of the steel columns and steel beams through support connectors at the outer ends, and can generate axial displacement and provide a restoring force by the self-centering connection device when stressed.

[0013] Preferably, peanut-shaped holes are arranged in a horizontal and vertical array on the negative Poisson's ratio energy-dissipating steel plate.

[0014] Preferably, the negative Poisson's ratio energy-dissipating steel plate shear wall further includes left vertical connecting angle steels and right vertical connecting angle steels;

[0015] Two groups of the left vertical connecting angle steels are clamped on the left edge of the negative Poisson's ratio energy-dissipating 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 negative Poisson's ratio energy-dissipating steel plate through a vertical steel plate high-strength bolt group;

[0016] Two groups of the right vertical connecting angle steels are clamped on the right edge of the negative Poisson's ratio energy-dissipating 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 negative Poisson's ratio energy-dissipating steel plate through a vertical steel plate high-strength bolt group.

[0017] Preferably, one limb of two groups of the left vertical connecting angle steels connected to the steel column and one limb of two groups of the right vertical connecting angle steels connected to the steel column are provided with oblong holes, and the other limb connected to the negative Poisson's ratio energy-dissipating steel plate is provided with round holes. Round holes are correspondingly arranged at the left and right edges of the negative Poisson's ratio energy-dissipating steel plate.

[0018] Preferably, the negative Poisson's ratio energy-dissipating steel plate shear wall further includes upper horizontal connecting angle steels and lower horizontal connecting angle steels;

[0019] Two groups of the upper horizontal connecting angle steels are clamped on the upper edge of the negative Poisson's ratio energy-dissipating steel plate. One limb is connected and fixed to the steel beam through a horizontal steel beam high-strength bolt group, and the other limb is connected and fixed to the negative Poisson's ratio energy-dissipating steel plate through a horizontal steel plate high-strength bolt group;

[0020] Two groups of the lower horizontal connecting angle steels are clamped on the lower edge of the negative Poisson's ratio energy dissipation steel plate. One limb is fixedly connected to the ground beam through the high-strength bolt group of the horizontal ground beam, and the other limb is fixedly connected to the negative Poisson's ratio energy dissipation steel plate through the high-strength bolt group of the horizontal steel plate.

[0021] Preferably, long circular holes are formed in 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, circular holes are formed in the other limb connected to the negative Poisson's ratio energy dissipation steel plate, and circular holes are correspondingly formed in the upper and lower edges of the negative Poisson's ratio energy dissipation steel plate.

[0022] Preferably, the self-resetting connection device includes an even number of disc spring units. The disc spring unit includes two oppositely arranged disc spring baffles and a plurality of disc spring groups installed on the two disc spring baffles. The two disc spring baffles are respectively welded and fixed to the ends of two I-shaped steel bars, and through holes are correspondingly formed in the two disc spring baffles.

[0023] Preferably, each of the plurality of disc spring groups includes a disc spring unit one, two disc spring units two, and a disc spring anchor. The disc spring anchor penetrates through the through holes on the two disc spring baffles. Among them, one disc spring unit one is sleeved on the disc spring anchor between the two disc spring baffles, and the two disc spring units two are respectively sleeved on the disc spring anchors outside the two disc spring baffles.

[0024] Preferably, four groups of the disc spring units are provided, and the four groups of disc spring units are symmetrically arranged in two groups on both sides of the web of the I-shaped steel bar.

[0025] Preferably, the support connecting piece includes:

[0026] Connecting angle steel, which is fixedly connected to the steel columns and the steel beam / ground beam at two diagonal corners of the steel frame through the first high-strength bolt group;

[0027] Vertical connecting plate, which is vertically welded and fixed inside the connecting angle steel;

[0028] Oblique connecting plate, which is obliquely and symmetrically welded and fixed on both sides of the vertical connecting plate and is consistent with the axial direction of the I-shaped steel bar;

[0029] Web cover plate, which fixedly connects the web of the I-shaped steel bar and the vertical connecting plate through the second high-strength bolt group;

[0030] Flange cover plate, which fixedly connects the upper and lower flanges of the I-shaped steel bar and the oblique connecting plate through the third high-strength bolt group.

[0031] Preferably, a quarter circle is cut off at each of the four corners of the negative Poisson's ratio energy dissipation steel plate to form corner notches, and the support connecting piece is arranged in the corner notches.

[0032] Preferably, the self-centering prefabricated steel frame shear wall structure system is a single-story or multi-story structure system.

[0033] The beneficial effects of the present invention compared with the prior art are as follows: The self-centering prefabricated steel frame shear wall structure system provided by the present invention, which is configured with self-centering support units and negative Poisson's ratio energy dissipation steel plates, uses the self-centering support units to improve the self-centering ability of the shear wall, reduce residual deformation, and at the same time adopts the peanut-shaped opening design with negative Poisson's ratio effect to enhance the energy dissipation ability of the shear wall, reduce the damage of the main structure, and enhance the durability of the shear wall. The advantages of the present invention are mainly manifested in the following aspects:

[0034] (1) The present invention has good reset ability: In the steel frame structure of the self-centering energy dissipation shear wall of the present invention, after an earthquake, the self-centering support units in the frame can rely on the restoring force of the disc springs to restore the structural members to the initial position or close to the initial position, effectively reducing the residual deformation and maintaining the overall stability and service function. The frame columns and beams can basically return to their original positions, facilitating subsequent inspection and repair work, and also providing guarantee for the structure to continue to exhibit good seismic performance in subsequent possible earthquakes.

[0035] (2) The present invention has the effect of protecting non-structural members: Since the self-centering energy dissipation shear wall can be reset well, it reduces the damage to the non-structural members connected to it caused by structural deformation. It reduces the repair cost of non-structural members after an earthquake, and can also avoid secondary disasters caused by the damage of non-structural members, improving the safety and applicability of the building during an earthquake.

[0036] (3) The present invention has reusability: After an earthquake or other disasters, the self-centering support units of the self-centering energy dissipation shear wall can still be used after inspection and simple maintenance. This is different from some traditional energy dissipation devices that may need to be replaced after an earthquake. The reusability of the self-centering device reduces the repair cost and resource consumption of the structure after a disaster, and has good economic and environmental benefits.

[0037] (4) The present invention has high design flexibility: The mechanical properties of the I-shaped self-centering support units of the self-centering energy dissipation shear wall can be adjusted by cables and disc springs to adapt to different types and scales of steel structure buildings and different seismic fortification requirements.

[0038] (5) The present invention has a systematically enhanced anti-collapse ability: The steel plate of the self-centering energy-dissipating shear wall uses a negative Poisson's ratio material with peanut-shaped openings. Negative Poisson's ratio materials generally have good anti-buckling ability, and the peanut-shaped openings can adjust the local stiffness distribution of the steel plate to avoid excessive buckling or damage in local areas. This design can effectively control the local buckling mode, enabling the steel plate shear wall to maintain good stability and ductility when subjected to large loads, and not easily experiencing sudden yielding or failure. Through the openings of this special shape, the lateral expansion effect of the negative Poisson's ratio material is exerted, further optimizing the plastic deformation mechanism of the structure, enhancing the ductility and durability of the steel plate, and enabling it to maintain stable performance under seismic loading. Under the action of dynamic loads such as earthquakes, the structure can better convert external energy into its own deformation energy, effectively increase the energy dissipation amount, and reduce the impact of earthquakes on the structure. In addition, the peanut-shaped opening design not only helps improve the overall performance of the structure but also can reduce the amount of steel plate used without affecting the structural strength, thereby reducing the self-weight of the overall structure. Reducing material consumption also helps save costs. This design makes the structure more economical while maintaining high performance.

[0039] It should be understood that the implementation of any embodiment of the present invention does not mean that multiple or all of the above beneficial effects need to be simultaneously achieved or satisfied. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0041] The structures, ratios, sizes, etc. depicted in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention.

[0042] Figure 1 Exemplarily shown is an overall three-dimensional schematic diagram of a self-centering prefabricated steel frame shear wall structure system configured with a self-centering support unit and a negative Poisson's ratio energy-dissipating steel plate;

[0043] Figure 2 Exemplarily shown is a front view of a self-centering prefabricated steel frame shear wall structure system configured with a self-centering support unit and a negative Poisson's ratio energy-dissipating steel plate;

[0044] Figure 3 Exemplarily shown is a schematic structural diagram of a self - resetting support unit of a self - resetting prefabricated steel frame shear wall structure system configured with a self - resetting support unit and a negative Poisson's ratio energy - dissipating steel plate;

[0045] Figure 4 Exemplarily shown is a partially enlarged schematic view of the corner of a self - resetting prefabricated steel frame shear wall structure system configured with a self - resetting support unit and a negative Poisson's ratio energy - dissipating steel plate;

[0046] Figure 5 Exemplarily shown is an exploded view of a support connecting piece of a self - resetting prefabricated steel frame shear wall structure system configured with a self - resetting support unit and a negative Poisson's ratio energy - dissipating steel plate;

[0047] Figure 6 Exemplarily shown is a front view of a negative Poisson's ratio energy - dissipating steel plate of a self - resetting prefabricated steel frame shear wall structure system configured with a self - resetting support unit and a negative Poisson's ratio energy - dissipating steel plate.

[0048] Markings in the figure:

[0049] Self - resetting prefabricated steel frame shear wall structure system 100;

[0050] Steel column 1, steel beam 2, negative Poisson's ratio energy - dissipating steel plate shear wall 3;

[0051] Self - resetting support unit 4, I - shaped steel 41, self - resetting connection device 42, disc spring baffle 421, disc spring unit one 422, disc spring unit two 423, disc spring anchor 424, support connecting piece 43, connecting angle steel 431, vertical connecting plate 432, diagonal connecting plate 433, web cover plate 434, flange cover plate 435;

[0052] Negative Poisson's ratio energy - dissipating steel plate 5, round hole 51;

[0053] Ground beam 6;

[0054] Left vertical connecting angle steel 7, right vertical connecting angle steel 8, upper horizontal connecting angle steel 9, lower horizontal connecting angle steel 10;

[0055] Vertical steel column high - strength bolt group 11, vertical steel plate high - strength bolt group 12, horizontal steel beam high - strength bolt group 13, horizontal steel plate high - strength bolt group 14, horizontal ground beam high - strength bolt group 15;

[0056] High - strength bolt group one 16, high - strength bolt group two 17, high - strength bolt group three 18.

[0057] In each figure, the same or corresponding reference numerals denote the same or corresponding parts. Detailed implementation manners

[0058] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer and more understandable, the embodiments of the present invention will be further described in detail below in conjunction with the embodiments and the drawings. Herein, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but do not limit the present invention.

[0059] In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "linkage", "fixation" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] It should be understood that terms such as "including / containing", "consisting of" or any other variant are intended to cover non-exclusive inclusion, so that a product, device, process or method including a series of elements not only includes those elements, but also includes other elements that are not explicitly listed when needed, or further includes elements inherent in such a product, device, process or method. Without more limitations, the elements defined by the statement "including / containing..." or "consisting of" do not exclude the existence of additional identical elements in the product, device, process or method including the said elements.

[0061] It is also necessary to understand that terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device, component or structure referred to must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation to the present invention.

[0062] In addition, terms such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined by "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality of" is two or more, unless otherwise clearly and specifically defined.

[0063] Traditional steel plate shear walls rely on the plastic deformation of the wall itself to dissipate seismic energy, resulting in concentrated damage to the main structure under seismic action. After the steel has undergone plastic deformation, it cannot automatically reset, resulting in the loss of building functions and difficulty in post-earthquake repair.

[0064] In addition, the Poisson's ratio is an important parameter for measuring the mechanical properties of materials. Usually, the Poisson's ratio of materials is positive, that is, when axially tensioned or compressed, the materials will undergo lateral contraction or expansion respectively. In contrast, materials with a negative Poisson's ratio exhibit characteristics opposite to those of conventional materials, that is, the materials will expand laterally when tensioned and contract laterally when compressed. This characteristic enables them to provide better deformation coordination and stability under stress, thus promising to improve the buckling resistance and energy dissipation performance of structural members.

[0065] Based on this, the present invention proposes a self-centering prefabricated steel frame shear wall structure system configured with self-centering support units and negative Poisson's ratio energy dissipation steel plates. Aiming at the problems of poor self-centering ability and insufficient load-bearing and energy dissipation of current steel plate shear walls, the above problems are optimized and improved by adopting the design concept of self-centering support units and negative Poisson's ratio structures.

[0066] The following will elaborate in detail on the specific implementation and preferred solutions of a self-centering prefabricated steel frame shear wall structure system configured with self-centering support units and negative Poisson's ratio energy dissipation steel plates proposed by the present invention.

[0067] Generally as Figures 1-6 shown, a self-centering prefabricated steel frame shear wall structure system configured with self-centering support units and negative Poisson's ratio energy dissipation steel plates, the self-centering prefabricated steel frame shear wall structure system 100 mainly includes: steel columns 1, steel beams 2 (the bottom layer is a ground beam 6), negative Poisson's ratio energy dissipation steel plate shear walls 3, and self-centering support units 4. Among them, the steel columns 1 are I-shaped or H-shaped, the steel beams 2 are I-shaped or H-shaped, the negative Poisson's ratio energy dissipation steel plate shear walls 3 are installed within the steel frame formed by the steel columns 1 and the steel beams 2, and two groups of self-centering support units 4 are provided. The two groups of self-centering support units 4 are symmetrically arranged on both sides of the negative Poisson's ratio energy dissipation steel plate shear wall 3, that is, the front and back sides, and are connected and fixed at two diagonal corners of the steel frame, thus constituting a self-centering prefabricated steel frame shear wall structure system configured with self-centering support units and negative Poisson's ratio energy dissipation steel plates.

[0068] Specifically, the steel frame is formed by welding the steel columns 1, the steel beams 2, and the ground beam 6 (or foundation), and beam-column joint domain stiffeners are welded at the beam-column connection. The beam-column joint domain stiffeners are composed of two rectangular plates and are welded to the flanges on both sides of the steel column 1 to strengthen it through welding in the beam-column joint area.

[0069] In the present invention, specifically referring to Figure 6 , the negative Poisson's ratio energy dissipation steel plate shear wall 3 is mainly composed of negative Poisson's ratio energy dissipation steel plates 5. The negative Poisson's ratio energy dissipation steel plates 5 have the characteristics of a negative Poisson's ratio and are used as buckling energy dissipation structures to solve the problem of insufficient load-bearing and energy dissipation of current steel plate shear walls.

[0070] Inside the steel frame, the negative Poisson's ratio energy dissipating steel plate 5 is fixedly connected to the steel column 1 around the middle, and is fixedly connected to the steel beam 2 (ground beam 6) above and below. It should be noted that for the single-story structure or the bottom layer of the multi-story structure, the upper part of the shear wall is the steel beam 2, and the bottom is the ground beam 6 (or foundation). At this time, the upper part of the negative Poisson's ratio energy dissipating steel plate 5 is fixedly connected to the steel beam 2, and the lower part is fixedly connected to the ground beam 6 (or foundation). For the upper layer of the multi-story structure, both the upper and lower parts of the shear wall are steel beams 2. At this time, both the upper and lower parts of the negative Poisson's ratio energy dissipating steel plate 5 are fixedly connected to the steel beam 2.

[0071] Under the action of an earthquake, the negative Poisson's ratio energy dissipating steel plate 5 buckles to dissipate energy. When the negative Poisson's ratio energy dissipating steel plate 5 undergoes irreversible plastic deformation after the earthquake, it only needs to be removed and replaced, achieving energy dissipation while enabling quick replacement and repair, ensuring the recoverability of the structural system.

[0072] In some embodiments, particularly referring to Figure 2 , the self-centering prefabricated steel frame shear wall structure system 100 further includes a left vertical connecting angle steel 7 and a right vertical connecting angle steel 8. It is easy to understand that the vertical connecting angle steel has two limbs, and a strip-shaped angle steel (or L-shaped steel plate) is used. Two groups of left vertical connecting angle steels 7 clamp the left edge of the negative Poisson's ratio energy dissipating 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 fixedly connected to the steel column 1 through the vertical steel column high-strength bolt group 11, and the other limb is attached to the negative Poisson's ratio energy dissipating steel plate 5 and is fixedly connected through the vertical steel plate high-strength bolt group 12; two groups of right vertical connecting angle steels 8 also clamp the right edge of the negative Poisson's ratio energy dissipating 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 fixedly connected to the steel column 1 through the vertical steel column high-strength bolt group 11, and the other limb is attached to the negative Poisson's ratio energy dissipating steel plate 5 and is fixedly connected through the vertical steel plate high-strength bolt group 12.

[0073] Specifically, two rows of round holes are vertically opened on the inner-facing flange of the steel column 1. The two rows of round holes are symmetrically arranged with respect to the web of the steel column 1. One limb of the two groups of left vertical connecting angle steels 7 that are connected to the steel column 1 is provided with through holes, and the two groups of vertical steel column high-strength bolt groups 11 pass through the through holes and are fixedly connected to the two rows of round holes on the flange of the left steel column 1. Similarly, one limb of the two groups of right vertical connecting angle steels 8 that are connected to the steel column 1 is provided with through holes, and the two groups of vertical steel column high-strength bolt groups 11 pass through the through holes and are fixedly connected to the two rows of round holes on the flange of the right steel column 1. In this way, the negative Poisson's ratio energy dissipating steel plate 5 is fixedly connected to the steel columns 1 on both sides.

[0074] Meanwhile, round holes are drilled in the other legs of the two groups of left vertical connecting angle steels 7 connected to the negative Poisson's ratio energy dissipation steel plate 5, and round holes are drilled in the other legs of the two groups of right vertical connecting angle steels 8 connected to the negative Poisson's ratio energy dissipation steel plate 5. Also, a row of round holes 51 are correspondingly drilled in the left and right edges of the negative Poisson's ratio energy dissipation steel plate 5. On the left side, it is connected and fixed by a group of vertical steel plate high-strength bolt groups 12 passing through the round holes 51 and the round holes in the other leg of the left vertical connecting angle steel 7. On the right side, it is connected and fixed by a group of vertical steel plate high-strength bolt groups 12 passing through the round holes 51 and the round holes in the other leg of the right vertical connecting angle steel 8. In this way, the left and right sides of the negative Poisson's ratio energy dissipation steel plate 5 are connected and fixed to the two side steel columns 1. It should be noted that the vertical steel plate high-strength bolt groups 12 are tightened according to the designed pre-tightening force; all the connecting angle steels in this part are first connected on one side of the negative Poisson's ratio energy dissipation steel plate 5, and then the connecting angle steels on the other side are connected after installing the negative Poisson's ratio energy dissipation steel plate 5.

[0075] In some embodiments, referring further to Figures 1-2 , the self-centering prefabricated steel frame shear wall structure system 100 further includes upper horizontal connecting angle steels 9 and lower horizontal connecting angle steels 10. Similar to the left vertical connecting angle steels 7 and the right vertical connecting angle steels 8, the horizontal connecting angle steels are strip-shaped angle steels (or L-shaped steel plates), and the angle steels have two legs. The two groups of upper horizontal connecting angle steels 9 are clamped on the upper edge of the negative Poisson's ratio energy dissipation steel plate 5 from both sides in a back-to-back manner. One leg is attached to the lower flange of the steel beam 2 and is connected and fixed to the steel beam 2 through the horizontal steel beam high-strength bolt group 13, and the other leg is attached to the negative Poisson's ratio energy dissipation steel plate 5 and is connected and fixed through the horizontal steel plate high-strength bolt group 14; the two groups of lower horizontal connecting angle steels 10 are also clamped on the lower edge of the negative Poisson's ratio energy dissipation steel plate 5 from both sides in a back-to-back manner. One leg is attached to the upper flange of the ground beam 6 and is connected and fixed to the ground beam 6 through the horizontal ground beam high-strength bolt group 15, and the other leg is attached to the negative Poisson's ratio energy dissipation steel plate 5 and is connected and fixed through the horizontal steel plate high-strength bolt group 14.

[0076] Specifically, two rows of round holes are drilled on the inner side lower flange of the steel beam 2, and the two rows of round holes are symmetrically arranged with respect to the web of the steel beam 2. Through holes are drilled in the legs of the two groups of upper horizontal connecting angle steels 9 connected to the steel beam 2, and the two groups of horizontal steel beam high-strength bolt groups 13 pass through the through holes on the upper horizontal connecting angle steels 9 and are connected and fixed to the two rows of round holes on the flange of the steel beam 2. Similarly, two rows of round holes are drilled on the inner side upper flange of the ground beam 6, and the two rows of round holes are symmetrically arranged with respect to the web of the ground beam 6. Through holes are drilled in the legs of the two groups of lower horizontal connecting angle steels 10 connected to the ground beam 6, and the two groups of horizontal ground beam high-strength bolt groups 15 pass through the through holes on the lower horizontal connecting angle steels 10 and are connected and fixed to the two rows of round holes on the flange of the ground beam 6. In this way, the negative Poisson's ratio energy dissipation steel plate 5 is connected and fixed to the steel beam 2 and the ground beam 6.

[0077] At the same time, circular holes are opened on the other limbs of the two groups of upper horizontal connecting angle steels 9 connected to the negative Poisson's ratio energy dissipation steel plate 5, and circular holes are opened on the other limbs of the two groups of lower horizontal connecting angle steels 10 connected to the negative Poisson's ratio energy dissipation steel plate 5. The upper and lower edges of the negative Poisson's ratio energy dissipation steel plate 5 also have a row of circular holes 51 respectively opened. The upper part is connected and fixed to the circular holes on the other limb of the upper horizontal connecting angle steel 9 through a group of horizontal steel plate high-strength bolts 14, and the lower part is connected and fixed to the circular holes on the other limb of the lower horizontal connecting angle steel 10 through a group of horizontal steel plate high-strength bolts 14. In this way, the upper part of the negative Poisson's ratio energy dissipation steel plate 5 is connected and fixed to the steel beam 2, and the lower part is connected and fixed to the ground beam 6.

[0078] In the embodiment of the present invention, the four sides of the negative Poisson's ratio energy dissipation steel plate 5 are connected and fixed to the steel column 1, the steel beam 2 and the ground beam 6 by connecting angle steels and high-strength bolt groups. It is convenient to disassemble, replace and repair on site without welding. After earthquake buckling, it only needs to remove the high-strength bolt group for replacement.

[0079] Preferably, the through holes defined by the two sets of left vertical angle steels 7 connecting to the steel column 1, and the through holes defined by the two sets of right vertical angle steels 8 connecting to the steel column 1, are preferably oblong holes, to reduce installation errors. Similarly, the through holes defined by the two sets of upper horizontal angle steels 9 connecting to the steel beam 2, and the through holes defined by the two sets of lower horizontal angle steels 10 connecting to the ground beam 6, are also oblong holes, to reduce installation errors.

[0080] Continue to see Figure 6 The negative Poisson's ratio energy dissipation 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 are alternated, 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 the 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 force, 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 the effect of buckling-free. 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.

[0081] 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.

[0082] 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.

[0083] It is easy to understand that in the present invention, the negative Poisson's ratio energy dissipation steel plate 5 serves as an energy dissipation structure, and the geometric parameters and array parameters of its peanut-shaped openings can be adjusted according to actual engineering requirements.

[0084] The number of openings connecting all the connecting angle steels with the steel column 1, steel beam 2 and ground beam 6 (foundation) needs to take into account the design bearing capacity, so that the negative Poisson's ratio energy dissipation steel plate 5 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.

[0085] See also Figure 3 In some embodiments, the self-resetting device 4 includes two I-shaped steels 41, which are butt-connected at the inner end by a self-resetting connection device 42, and are connected and fixed to the corners of the steel column 1 and the steel beam 2 at the outer end by a support connection member 43. When subjected to force, the self-resetting connection device 42 can generate axial displacement and provide a reset force.

[0086] In one embodiment, the self-resetting connection device 42 includes an even number of disc spring units, each of which includes two relatively arranged disc spring baffles 421 and a plurality of disc spring groups installed on the two disc spring baffles 421. The two disc spring baffles 421 are respectively welded and fixed to the ends of two I-beams, thereby installing the disc spring unit on the I-beam and enhancing the connection strength and integrity of the ends of the I-beam.

[0087] Specifically, each disc spring group includes a disc spring unit 1 422, two disc spring units 2 423 and a disc spring anchor 424. The disc spring anchor 424 is passed through the two disc spring baffles 421. The two disc spring baffles 421 are respectively provided with through holes. The disc spring anchor 424 is made of a high-strength steel rod and passed through the through holes of the two disc spring baffles 421. A disc spring unit 1 422 is sleeved on the rod between the two disc spring baffles 421. One disc spring unit 2 423 is sleeved on the rod on the outside of one of the disc spring baffles 421, and the other disc spring unit 2 423 is sleeved on the rod on the outside of the other disc spring baffle 421, and the two ends of the rod are anchored and fixed.

[0088] Preferably, four groups of disc spring units are provided, and the four groups of disc spring units are symmetrically arranged in pairs on both sides of the web of the I-beam 41.

[0089] The disc spring baffle 421 can be a square plate or a rectangular plate. The number and size of the disc spring units are determined according to the design requirements. The disc spring unit 1 422 and the disc spring unit 2 423 can be designed to be the same or different. As shown in the figure, the disc spring unit 1 422 is designed to be longer than the disc spring unit 2 423. In addition, the disc spring units should be kept centrosymmetric or axially symmetric to prevent the generation of additional bending moments.

[0090] In the present invention, the adopted disc spring reset device first provides self-resetting ability. As is well known, the reset force provided by a single disc spring is very limited, and a large reset force must be provided by stacking disc springs. However, stacking a large number of disc springs will cause an unpredictable increase in the friction between the disc spring surfaces, thereby making the support performance difficult to predict. The present invention adopts four groups of disc spring units, and the friction of a single group of disc springs can be effectively controlled. At the same time, when the support is in tension, the disc spring unit 2 423 works and the disc spring unit 1 422 does not work, which can further reduce the generation of additional friction. Similarly, when the support is in compression, the disc spring unit 1 422 works and the disc spring unit 2 423 does not work, and the above effect can also be achieved.

[0091] In the present invention, the adopted disc spring reset device can also enable the support to have a certain bending resistance. Since the disc spring unit 2 423 is compressed when the whole support is in tension and the disc spring unit 1 422 is compressed when the whole support is in compression, considering that the actual connection mode between the support and the main structure is not completely fixed, that is, both ends of the support have a certain rotation ability. Under the action of an earthquake, if the whole support is in compression, for example, the whole support is "bent" by the earthquake force, the two ends of the support may rotate, generating a bending moment in the middle of the support. At this time, the disc spring unit 1 422 in the middle of the symmetric disc spring group is compressed, generating a resilience force, which can effectively resist the generated additional bending moment.

[0092] Continue to refer to Figure 4 、 Figure 5, in some embodiments, the support connecting member 43 includes: a connecting angle steel 431, a vertical connecting plate 432, an inclined connecting plate 433, a web cover plate 434, and a flange cover plate 435. Among them, the connecting angle steel 431 is fixedly connected to the steel columns 1 and the steel beams 2 / ground beams 6 at two diagonal corners of the steel frame by a group of high-strength bolts 16; the vertical connecting plate 432 is vertically welded and fixed inside the connecting angle steel 431; the inclined connecting plate 433 is symmetrically welded and fixed obliquely on both sides of the vertical connecting plate 432 and is aligned with the axis of the I-shaped steel 41; the web cover plate 434 is fixedly connected to the web of the I-shaped steel 41 and the vertical connecting plate 432 by a group of high-strength bolts 17; the flange cover plate 435 is fixedly connected to the upper and lower flanges of the I-shaped steel 41 and the inclined connecting plate 433 by a group of high-strength bolts 18, thus connecting and fixing both ends of the I-shaped steel 41. The support connecting member 43 has stable force, and the web cover plate 434 and the flange cover plate 435 are assembled and connected with the support, which is convenient for construction and installation; it is convenient to replace quickly after plastic deformation occurs, and the repair cost is low.

[0093] It should be noted that two sets of vertical connecting plates 432 and inclined connecting plates 433 are arranged inside the connecting angle steel 431 to symmetrically connect two groups of self-resetting devices 4 on both sides of the shear wall.

[0094] See again Figure 2 、 Figure 6 , quarter circles are cut out at the four corners of the negative Poisson's ratio energy dissipation steel plate 5 to form corner notches, and the support connecting member 43 is arranged in the corner notches. This can avoid stress concentration at the corners while facilitating installation.

[0095] The working principle of the self-resetting prefabricated steel frame shear wall structure system 100 of the present invention can be understood as follows:

[0096] Under minor earthquakes, low-damage energy dissipation is achieved through the elastic cooperation of the self-resetting support unit 4 and the negative Poisson's ratio energy dissipation steel plate shear wall 3. At this time, the disc spring group is compressed and stores energy under the action of the pre-tightening force, providing the initial stiffness and dissipating seismic energy. The peanut holes on the negative Poisson's ratio energy dissipation steel plate 5 strengthen the local stiffness through elastic shear deformation and transverse expansion effects. The I-shaped support remains in an elastic state, and the symmetrically arranged support system effectively restricts the buckling of the shear wall. The overall energy dissipation mode is mainly elastic deformation, ensuring that the structure is basically undamaged under minor earthquakes.

[0097] Under medium earthquake action, the energy dissipation path is upgraded to a cooperative mechanism of plastic hinges and strain hardening. The end connection plate of the I-shaped brace first enters the plastic state, forming symmetrically distributed plastic hinges to bear part of the seismic energy. At the same time, the peanut holes of the negative Poisson's ratio core plate expand significantly on the tensile side, and the bearing capacity is improved through material strain hardening. When the upper disc spring in the disc spring group is bent, it is in tension, and the lower disc spring is in compression. The seismic energy is converted into elastic potential energy and released after the earthquake, dissipating part of the seismic energy while achieving the self-centering effect. At this time, the three form a hierarchical energy dissipation system, significantly reducing the damage of the main structure through the superposition of plastic deformation and friction energy dissipation.

[0098] Under large earthquake action, a multi-level energy dissipation cooperative mechanism is activated to achieve ultimate energy dissipation. The I-shaped brace fully yields, forming double plastic hinges to achieve the energy dissipation effect. The negative Poisson's ratio web is compressed and expanded, delaying local buckling and increasing the ultimate strain. The disc spring group continues to deform and dissipate energy to reach the peak value, and at the same time, the pre-tightening force maintains the integrity of the structure. The geometric nonlinear effect of the cross brace further decomposes the residual deformation, and finally, through the dual action of elastic restoring force and plastic deformation, efficient energy absorption is achieved.

[0099] All the welding processes of the present invention can be completed in a prefabrication factory. The prefabrication factory produces standard "modules". At the construction site, only by positioning according to the reserved bolt holes and assembling the "modules" with high-strength bolts can the structure installation be completed, which has the characteristics of high modularity. This "building block" construction concept reduces the use of labor and the construction difficulty, thus effectively shortening the construction period.

[0100] The present invention can be applied to single-story buildings, and can also be combined with detachable and replaceable shear walls, energy dissipation braces, etc. to form a frame-shear wall system or a frame-brace system, and can be flexibly applied to multi-story and high-rise building systems.

[0101] Although several specific implementation details are included in the above description, these should not be construed as limiting the scope of the present invention. Certain features described in the context of separate embodiments can also be implemented combinatorially in a single implementation. Conversely, the various features described in the context of a single implementation can also be implemented separately or in any suitable sub-combination in multiple implementations.

Claims

1. A self-centering precast steel frame shear wall structure system configured with self-centering support units and negative Poisson's ratio energy dissipation steel plates, characterized in that, The self-centering prefabricated steel frame shear wall structure system mainly includes: Steel columns, in the shape of I-beam / H-beam; Steel beams, in the shape of I-beam / H-beam; Negative Poisson's ratio energy dissipation steel plate shear wall, installed within the steel frame formed by the steel columns and the steel beams, including: Negative Poisson's ratio energy dissipation steel plates, connected and fixed to the steel columns and steel beams; Self-centering support units, two groups of the self-centering support units are symmetrically arranged on both sides of the negative Poisson's ratio energy dissipation steel plate shear wall, and the two ends are connected and fixed to two diagonal corners of the steel frame, including: Two I-shaped steel bars, butt-connected through a self-centering connection device at the inner ends, and connected and fixed to the corners of the steel columns and steel beams through support connectors at the outer ends, and capable of generating axial displacement and providing a restoring force by the self-centering connection device when stressed.

2. The self-resetting prefabricated steel frame shear wall structure system according to claim 1, characterized in that, Peanut holes are arranged in a horizontal and vertical alternating array on the negative Poisson's ratio energy dissipation steel plate.

3. The self-centering prefabricated steel frame shear wall structure system according to claim 1, wherein, The negative Poisson's ratio energy dissipation steel plate shear wall further includes left vertical connecting angle steels and right vertical connecting angle steels; Two groups of the left vertical connecting angle steels are clamped on the left edge of the negative Poisson's ratio energy dissipation 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 negative Poisson's ratio energy dissipation steel plate through a vertical steel plate high-strength bolt group; Two groups of the right vertical connecting angle steels are clamped on the right edge of the negative Poisson's ratio energy dissipation 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 negative Poisson's ratio energy dissipation steel plate through a vertical steel plate high-strength bolt group.

4. The self-resetting prefabricated steel frame shear wall structure system according to claim 3, characterized in that, One limb of the two groups of the left vertical connecting angle steels connected to the steel column and one limb of the two groups of the right vertical connecting angle steels connected to the steel column are provided with oblong holes, and the other limb connected to the negative Poisson's ratio energy dissipation steel plate is provided with round holes, and round holes are correspondingly arranged on the left and right edges of the negative Poisson's ratio energy dissipation steel plate.

5. The self-resetting prefabricated steel frame shear wall structure system according to claim 1, wherein The negative Poisson's ratio energy dissipation steel plate shear wall further includes upper horizontal connecting angle steels and lower horizontal connecting angle steels; Two groups of the upper horizontal connecting angle steels are clamped on the upper edge of the negative Poisson's ratio energy dissipation steel plate, one limb is connected and fixed to the steel beam through a horizontal steel beam high-strength bolt group, and the other limb is connected and fixed to the negative Poisson's ratio energy dissipation steel plate through a horizontal steel plate high-strength bolt group; Two groups of the lower horizontal connecting angle steels are clamped on the lower edge of the negative Poisson's ratio energy dissipation steel plate, one limb is connected and fixed to the ground beam through a horizontal ground beam high-strength bolt group, and the other limb is connected and fixed to the negative Poisson's ratio energy dissipation steel plate through a horizontal steel plate high-strength bolt group.

6. The self-centering prefabricated steel frame shear wall structure system according to claim 5, characterized in that One limb of the two groups of the upper horizontal connecting angle steels connected to the steel beam and one limb of the two groups of the lower horizontal connecting angle steels connected to the ground beam are provided with oblong holes, and the other limb connected to the negative Poisson's ratio energy dissipation steel plate is provided with round holes, and round holes are correspondingly arranged on the upper and lower edges of the negative Poisson's ratio energy dissipation steel plate.

7. The self-resetting prefabricated steel frame shear wall structure system according to any one of claims 1-6, characterized in that, The self-centering connection device includes an even number of disc spring units, and each disc spring unit includes two oppositely arranged disc spring baffles and a plurality of disc spring groups installed on the two disc spring baffles. The two disc spring baffles are respectively welded and fixed to the ends of the two I-shaped steel bars, and through holes are correspondingly arranged on the two disc spring baffles.

8. The self-centering prefabricated steel frame shear wall structure system according to claim 7, wherein Each of the plurality of disc spring groups includes a disc spring unit one, two disc spring units two, and a disc spring anchor. The disc spring anchor passes through through-holes on the two disc spring baffles. Among them, one disc spring unit one is sleeved on the disc spring anchor between the two disc spring baffles, and the two disc spring units two are respectively sleeved on the disc spring anchor outside the two disc spring baffles.

9. The self-resetting prefabricated steel frame shear wall structure system according to any one of claims 1-6, characterized in that The support connecting member includes: Connecting angle steel, which is fixedly connected to the steel columns and steel beams / ground beams at two diagonal corners of the steel frame by a group of high-strength bolts one; Vertical connecting plate, which is vertically welded and fixed inside the connecting angle steel; Oblique connecting plate, which is symmetrically welded obliquely on both sides of the vertical connecting plate and is aligned with the axial direction of the I-shaped steel; Web cover plate, which is fixedly connected to the web of the I-shaped steel and the vertical connecting plate by a group of high-strength bolts two; Flange cover plate, which is fixedly connected to the upper and lower flanges of the I-shaped steel and the oblique connecting plate by a group of high-strength bolts three.

10. The self-resetting prefabricated steel frame shear wall structure system according to claim 1, characterized in that, The negative Poisson's ratio energy dissipation steel plate has a quarter circle cut off at each of its four corners to form corner notches, and the support connecting member is arranged in the corner notches.

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