I-shaped double-yield-point self-resetting buckling restrained brace with built-in self-balancing disc spring assembly and peanut hole net inner core

Abstract

The invention provides an I-shaped double-yield-point self-resetting buckling restrained brace with a built-in self-balancing disc spring assembly and a peanut hole net inner core, which mainly comprises an I-shaped self-resetting connecting unit formed by butting and connecting two pieces of I-shaped steel through the self-balancing disc spring assembly; the peanut hole net inner core first-order energy consumption units are arranged on the upper and lower flanges of the two pieces of I-shaped steel at the butt joint; the peanut hole net inner core second-order energy consumption units are arranged on the left side and the right side of the two pieces of I-shaped steel at the butt joint position; the peripheral box type buckling-restrained casing pipe is arranged on the two pieces of I-shaped steel in a sleeving mode at the butt joint position; and the peanut hole net inner core first-order energy consumption unit is fixedly connected with the I-shaped self-resetting connecting unit, and can generate axial sliding of first displacement relative to the peanut hole net inner core second-order energy consumption unit and the peripheral box-type buckling-restrained casing pipe. The mechanical property of the support is effectively improved through the first-order negative Poisson's ratio time sequence energy consumption inner core, the second-order negative Poisson's ratio time sequence energy consumption inner core and the disc spring reset device.

Description

Technical Field

[0001] The present invention relates to the field of building structure technology, especially the field of structural engineering energy dissipation and vibration reduction technology, and specifically relates to an I-shaped double-yield point self-resetting buckling restraint support with a built-in self-balancing disc spring component and a peanut hole mesh inner core. Background Art

[0002] As an important lateral-resistance system, steel frame structures are widely used in earthquake-prone areas. Beam-column connection nodes play a vital role in transferring slab loads to vertical load-bearing components. Frame structures designed according to traditional design concepts dissipate seismic energy through plastic deformation in core areas, such as plastic hinges in beam segments and buckling-resistance brace cores. This design approach is recognized by most designers for its clearer load-bearing mechanism and simple and straightforward construction. However, plastic deformation of the main structure often leads to irreversible damage, resulting in huge economic losses. To address this issue, structures designed based on the concept of centralized plastic damage control have emerged.

[0003] Steel frame structures designed based on the principles of centralized plastic damage control and replaceable energy-absorbing components can effectively limit plastic damage to the energy-absorbing components, maintaining the main structure in an elastic state. After an earthquake, only the energy-absorbing components that have incurred irreversible plastic damage need to be replaced to restore the building's structural function. This reduces the difficulty of post-earthquake repair of traditional steel structures and, in turn, mitigates the economic losses caused by repair difficulties and loss of building function. However, existing experience and research indicate that even with replaceable energy-absorbing components, the structure may still produce significant residual deformation due to accumulated plastic deformation, compromising the building's safety and serviceability.

[0004] To address this issue, self-righting structural systems have become a research hotspot. Their core concept is to use reset elements to automatically restore the structure to its initial configuration after an earthquake, significantly reducing residual deformation. However, existing self-righting technologies often struggle to balance high energy dissipation with stable reset performance. In particular, under strong earthquakes, they can experience degradation of reset capacity or insufficient energy dissipation.

[0005] In view of this, the present invention is proposed Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the present invention provides an I-shaped double-yield point self-resetting buckling restraint support with a built-in self-balancing disc spring assembly and a peanut hole mesh inner core. It is a self-resetting anti-buckling support based on a negative Poisson's ratio time-sequential energy dissipation core, which aims to improve the seismic performance of buildings and coordinate the inter-story deformation of buildings under earthquakes.

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

[0008] The present invention first provides an I-shaped double-yield point self-resetting buckling restraint support with a built-in self-balancing disc spring assembly and a peanut hole network inner core, which mainly includes:

[0009] The I-shaped self-resetting connection unit is composed of two I-shaped steels butted together by a self-balancing disc spring assembly. When subjected to force, the I-shaped self-resetting connection unit can generate axial displacement and provide a reset force due to the self-balancing disc spring assembly.

[0010] The first-order energy dissipation unit in the core of the peanut mesh is set on the upper and lower flanges of the two I-shaped steels at the butt connection;

[0011] The second-order energy dissipation unit in the core of the peanut mesh is set on the left and right sides of the two I-shaped steels at the butt connection;

[0012] The outer box-shaped buckling-resistance sleeve is sleeved on the two I-shaped steels at the butt joint, with the upper and lower sides connected to the first-order energy dissipation unit of the peanut hole network core and the upper and lower flanges of the two I-shaped steels, and the left and right sides connected to the second-order energy dissipation unit of the peanut hole network core and the left and right sides of the two I-shaped steels; and

[0013] The first-order energy dissipation unit of the peanut hole mesh inner core is fixedly connected to the I-shaped self-resetting connection unit, and can generate axial sliding of the first displacement relative to the second-order energy dissipation unit of the peanut hole mesh inner core and the peripheral box-type anti-buckling sleeve.

[0014] Preferably, the I-shaped self-resetting connection unit is formed by welding anti-buckling side plates on the left and right sides of the two I-shaped steels at the butt connection to form a local box structure;

[0015] The two ends of the second-order energy dissipation unit in the peanut mesh inner core are connected to the anti-buckling side plates by bolts;

[0016] The upper and lower sides of the outer box-shaped anti-buckling sleeve are connected to the first-order energy dissipation unit of the peanut hole mesh inner core and the upper and lower flanges of the two I-shaped steels through bolts, and the left and right sides are connected to the second-order energy dissipation unit of the peanut hole mesh inner core and the anti-buckling side plates through bolts.

[0017] Preferably, the self-balancing disc spring assembly includes two relatively arranged disc spring baffles and a plurality of disc spring groups mounted on the two disc spring baffles, and the two disc spring baffles are respectively welded and fixed to the ends of two I-shaped steels.

[0018] Preferably, the plurality of disc spring groups each include a disc spring unit 1, two disc spring units 2 and a disc spring anchor, and the disc spring anchor is passed through the two disc spring baffles, wherein one disc spring unit is set on the disc spring anchor between the two disc spring baffles, and the two disc spring units 2 are respectively set on the disc spring anchor outside the two disc spring baffles.

[0019] Preferably, the first-order energy dissipation unit of the inner core of the peanut hole net adopts two strips of shaped steel plates, the middle of the two strips of shaped steel plates form a weakened area, and the weakened area is provided with peanut holes arranged in a horizontal and vertical array;

[0020] The second-order energy dissipation unit in the inner core of the peanut hole net adopts two strips of shaped steel plates, the middle of the two strips of shaped steel plates form a weakened area, and the weakened area is provided with peanut holes arranged in a horizontal and vertical array.

[0021] Preferably, the two shaped steel plates are respectively provided on the upper and lower flanges of the two I-shaped steels at the butt connection, and circular holes are provided at both ends of the two shaped steel plates, and circular holes are provided correspondingly on the upper and lower flanges of the two I-shaped steels, and are connected by a high-strength bolt group.

[0022] The two I-shaped steel plates are respectively arranged on the left and right sides of the two I-shaped steels at the butt connection, and the two ends of the two I-shaped steel plates are provided with oblong holes one, and the anti-buckling side plates are correspondingly provided with circular holes three, which are connected by high-strength bolt groups two.

[0023] Preferably, the outer box-type anti-buckling sleeve adopts a box-type steel pipe to be sleeved on two I-shaped steels at the butt connection, and the two ends of the top and bottom of the box-type steel pipe are provided with oblong hole 2 corresponding to the oblong hole 1 and the oblong hole 2, which are connected by a high-strength bolt group 1. At the same time, the left and right sides of the box-type steel pipe are provided with oblong hole 3 corresponding to the oblong hole 1 and the oblong hole 3, which are connected by a high-strength bolt group 2.

[0024] Preferably, the second oblong hole is longer than the third oblong hole;

[0025] The third oblong hole is longer than the first oblong hole.

[0026] Preferably, the I-shaped self-resetting connection unit is further provided with anti-buckling fork ribs at the butt connection, and four groups of the anti-buckling fork ribs are welded around and between the two disc spring baffles.

[0027] Preferably, each group of the anti-buckling fork ribs is formed by two semi-trapezoidal structures cross-connected with each other.

[0028] The present invention also provides an application of the buckling restrained brace in multi-story and high-rise prefabricated buildings.

[0029] The present invention has the following advantages over the prior art: It provides an I-shaped double-yield-point self-resetting buckling restraint brace with a built-in self-balancing disc spring assembly and a peanut mesh inner core. Through the first-order and second-order negative Poisson's ratio sequential energy dissipation inner core and the disc spring reset device, the mechanical properties of the brace are effectively improved. Specifically, it can bring at least the following advantages:

[0030] 1. The present invention is designed based on the concept of centralized control of plastic damage and replaceable energy-consuming elements. All plastic damage can be centralized and controlled on the energy-consuming elements, that is, all plastic damage is controlled on the first-order and second-order negative Poisson's ratio energy-consuming inner cores. After the earthquake, only the energy-consuming inner cores need to be replaced for continued use.

[0031] 2. The present invention effectively improves the ductility of the energy-absorbing core by providing holes with negative Poisson's ratio characteristics on the energy-absorbing core, that is, the entire support can withstand a larger deformation; the negative Poisson's ratio structure has better adaptability to impact loads, that is, this support is more suitable for layout in near-fault areas to cope with near-fault earthquakes with pulse effects that cause greater damage to buildings; the negative Poisson's ratio core will also produce multi-wave effects when under pressure, but based on finite element analysis, it has a smaller thickness requirement for the peripheral components than dog bones. In the present invention, the thickness of the peripheral box-type buckling-resistance sleeve and the buckling-resistance fork rib can be effectively controlled, which means that steel can be saved to a certain extent to reduce costs.

[0032] 3. Excellent self-reset capability. This invention relies on disc springs to provide the reset force. Using a disc spring cluster consisting of four small disc springs, the friction of these disc springs can be effectively controlled. Furthermore, when the support is under tension, the second disc spring unit operates while the first does not, further reducing the generation of additional friction. Similarly, when the support is under compression, the first disc spring unit operates while the second does not, achieving the same effect.

[0033] 4. Strong fracture resistance. Since the first-order negative Poisson's ratio energy dissipation core is always under stress as the support deformation continues to increase, there is still a potential risk of fracture under large earthquake deformation. Even if the first-order negative Poisson's ratio energy dissipation core of the present invention breaks, the force flow can be transmitted from the I-shaped connecting pipe to the outer buckling sleeve via high-strength bolts, and then from the outer buckling sleeve to the other side of the I-shaped connecting pipe, providing a last line of defense.

[0034] 5. The bolt hole opening design allows the support to exhibit distinct energy dissipation time series characteristics under both compression and tension. This means the static hysteresis curve of the present invention exhibits a distinct double-yield point characteristic, adapting to earthquakes of varying magnitudes. Specifically, under minor earthquakes, elasticity should be maintained, meaning both the first- and second-order negative Poisson's ratio energy dissipation cores should be in an elastic state. Under moderate earthquakes, the first-order negative Poisson's ratio energy dissipation core enters a plastic energy dissipation phase. Under major earthquakes, the I-shaped connecting tube presses against the second-order negative Poisson's ratio energy dissipation core, causing it to plastically dissipate seismic energy.

[0035] 6. The support has a certain degree of bending resistance. Under the action of an earthquake, the two ends of the support may rotate, generating a bending moment in the middle of the support. At this time, the symmetrical disc spring group is compressed by the first disc spring unit on one side and the second disc spring unit on the other side, which can effectively resist the additional bending moment generated.

[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 A three-dimensional diagram of an I-shaped double-yield point self-resetting buckling restraint support with a built-in self-balancing disc spring assembly and a peanut mesh inner core is shown as an example;

[0040] Figure 2 An exploded view of an I-shaped double-yield point self-resetting buckling restraint support with a built-in self-balancing disc spring assembly and a peanut mesh inner core is shown as an example;

[0041] Figure 3 A three-dimensional diagram of an I-shaped self-resetting connection unit with a built-in self-balancing disc spring assembly and a peanut mesh inner core is shown;

[0042] Figure 4 An exploded view of an I-shaped self-resetting connection unit with a built-in self-balancing disc spring assembly and a peanut mesh inner core is shown;

[0043] Figure 5 A three-dimensional diagram of a self-balancing disc spring assembly with an I-shaped double-yield point self-resetting buckling restraint support and a built-in self-balancing disc spring assembly and a peanut hole mesh inner core is shown as an example;

[0044] Figure 6 An exploded view of a self-balancing disc spring assembly with an I-shaped double-yield point self-resetting buckling restraint support and a built-in self-balancing disc spring assembly and a peanut hole mesh inner core is shown as an example;

[0045] Figure 7A three-dimensional diagram of a first-order energy dissipation unit of a peanut mesh inner core with an I-shaped double-yield point self-resetting buckling restraint support and a built-in self-balancing disc spring assembly and a peanut mesh inner core is shown as an example;

[0046] Figure 8 A three-dimensional diagram of a second-order energy dissipation unit of a peanut mesh inner core with an I-shaped double-yield point self-resetting buckling restraint support and a built-in self-balancing disc spring assembly and a peanut mesh inner core is shown as an example;

[0047] Figure 9 A three-dimensional diagram of a peripheral box-type buckling restraint sleeve with an I-shaped double-yield point self-resetting buckling restraint support and a built-in self-balancing disc spring assembly and a peanut hole network inner core is shown as an example;

[0048] Figure 10 A three-dimensional diagram of an anti-buckling fork rib with an I-shaped double-yield point self-resetting buckling restraint support with a built-in self-balancing disc spring assembly and a peanut hole mesh inner core is shown as an example.

[0049] Markings in the figure:

[0050] The first-order energy dissipation unit of the peanut hole mesh inner core is 1, the strip steel plate is 11, and the circular hole is 111;

[0051] The second-order energy dissipation unit 2 of the inner core of the peanut hole mesh, the second strip steel plate 21, and the first oblong hole 211;

[0052] I-shaped self-resetting connection unit 3, I-shaped steel 31, round hole 2 311;

[0053] Peripheral box-shaped anti-buckling sleeve 4, box-shaped steel pipe 41, oblong hole 2 411, oblong hole 3 412;

[0054] Self-balancing disc spring assembly 5, disc spring baffle 51, disc spring group 52, disc spring unit 1 521, disc spring unit 2 522, disc spring anchor 523;

[0055] Anti-buckling side plate 6, circular hole three 61;

[0056] Anti-buckling fork rib 7;

[0057] High strength bolt group 18;

[0058] High strength bolt group 29.

[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] The specific implementation and preferred scheme of the I-shaped double-yield point self-resetting buckling restraint support with a built-in self-balancing disc spring assembly and a peanut hole mesh inner core proposed by the present invention are described in detail below.

[0066] The present invention studies an I-shaped double-yield point self-resetting buckling restraint support with a built-in self-balancing disc spring assembly and a peanut hole network inner core, such as Figure 1-3As shown, it mainly includes: an I-shaped self-resetting connection unit 3, a first-order energy dissipation unit 1 of the peanut hole mesh inner core, a second-order energy dissipation unit 2 of the peanut hole mesh inner core, and a peripheral box-type anti-buckling sleeve 4. The I-shaped self-resetting connection unit 3 serves as the main structure of the entire buckling restraint support. When subjected to force, it can generate axial displacement and provide reset force, including axial tension and compression. The first-order energy dissipation unit 1 of the peanut hole mesh inner core performs first-order energy dissipation when the I-shaped self-resetting connection unit 3 generates axial displacement. The second-order energy dissipation unit 2 of the peanut hole mesh inner core performs second-order energy dissipation when the predetermined conditions are met. The peripheral box-type anti-buckling sleeve 4 provides peripheral anti-buckling constraints during first-order and second-order energy dissipation, while assisting force flow transfer and providing the last line of defense. In this way, the mechanical properties of the support are effectively improved through the first-order and second-order energy dissipation inner cores and the self-balancing disc spring assembly, which will be explained in detail later.

[0067] In the present invention, the I-shaped self-resetting connection unit 3 is composed of two I-shaped steels 31 connected by a self-balancing disc spring assembly 5. When subjected to force, the self-balancing disc spring assembly 5 can generate axial displacement and provide a reset force; the first-order energy dissipation unit 1 of the peanut hole network inner core is arranged on the upper and lower flanges of the two I-shaped steels 31 at the butt connection; the second-order energy dissipation unit 2 of the peanut hole network inner core is arranged on the left and right sides of the two I-shaped steels 31 at the butt connection; the outer box-shaped anti-buckling sleeve 4 is sleeved on the two I-shaped steels 31 at the butt connection, and the upper and lower sides are connected to the peanut hole network inner core. The first-order energy dissipation unit 1 of the core is connected to the upper and lower flanges of the two I-shaped steels 31, and the left and right sides are connected to the second-order energy dissipation unit 2 of the peanut mesh inner core and the left and right sides of the two I-shaped steels 31; and the first-order energy dissipation unit 1 of the peanut mesh inner core is fixedly connected to the I-shaped self-resetting connection unit 3, that is, the two will not move or slide relative to each other. At the same time, the first-order energy dissipation unit 1 of the peanut mesh inner core and the I-shaped self-resetting connection unit 3 can together produce a first displacement axial sliding relative to the second-order energy dissipation unit 2 of the peanut mesh inner core and the peripheral box-shaped anti-buckling sleeve 4. The axial sliding of the first displacement is when a predetermined condition is met, and the first-order energy dissipation performed by the first-order energy dissipation unit 1 of the peanut mesh inner core is converted into the second-order energy dissipation performed by the second-order energy dissipation unit 2 of the peanut mesh inner core.

[0068] In one embodiment, the I-shaped self-resetting connection unit 3 has anti-buckling side plates 6 welded to the left and right sides of the two I-shaped steels 31 at the butt joint. Four anti-buckling side plates 6 are welded to the left and right sides of the ends of the two I-shaped steels 31 at the butt joint, and are welded and fixed to the upper and lower flanges of the I-shaped steels 31, enclosing the two I-shaped steels 31 at this end to form a partial box-shaped structure. With the help of the anti-buckling side plates 6, the two ends of the peanut mesh inner core second-order energy dissipation unit 2 are connected to the anti-buckling side plates 6 by bolts. At the same time, the upper and lower sides of the peripheral box-shaped anti-buckling sleeve 4 are connected to the peanut mesh inner core first-order energy dissipation unit 1 and the upper and lower flanges of the two I-shaped steels 31 by bolts, and the left and right sides are connected to the peanut mesh inner core second-order energy dissipation unit 2 and the anti-buckling side plates 6 by bolts. In this way, the anti-buckling side plates 6 and the peripheral box-shaped anti-buckling sleeve 4 form the peripheral restraining member of the peanut mesh inner core second-order energy dissipation unit 2, preventing the peanut mesh inner core second-order energy dissipation unit 2 from buckling under compression.

[0069] In one embodiment, see Figure 4-6 , provides a specific self-balancing disc spring assembly 5, including two relatively arranged disc spring baffles 51 and a plurality of disc spring groups 52 installed on the two disc spring baffles 51, the two disc spring baffles 51 are respectively welded and fixed to the ends of the two I-beams 31, specifically welded to the ends of the local box-shaped structure of the above-mentioned two I-beams 31, and welded and fixed to the upper and lower flanges of the I-beam 31 and the anti-buckling side plates 6 on the left and right sides, so as to enhance the connection strength and integrity of the I-beam ends while installing the self-balancing disc spring assembly 5.

[0070] More specifically, four disc spring groups 52 are provided. Each disc spring group 52 includes a disc spring unit 1 521, two disc spring units 2 522, and a disc spring anchor 523. The disc spring anchor 523 is provided on two disc spring baffles 51. Figure 5-6 As shown, four through holes are correspondingly opened on the two disc spring baffles 51, and the disc spring anchor 523 adopts a high-strength alloy disc spring anchoring rod. The rod is passed through the through holes of the two disc spring baffles 51, and a disc spring unit 1 521 is sleeved on the rod between the two disc spring baffles 51. One disc spring unit 2 522 is sleeved on the rod on the outside of one of the disc spring baffles 51, and the other disc spring unit 2 522 is sleeved on the rod on the outside of the other disc spring baffle 51, and the two ends of the rod are anchored and fixed.

[0071] During installation, the four disc spring groups 52 should first be pre-compressed and anchored to form a disc spring reset device, and then the disc spring reset device should be welded to the ends of the two I-beams.

[0072] The disc spring baffle 51 can be formed in any suitable shape, such as a square, rectangular, or circular plate. The number and size of the disc spring group 52 are determined by design requirements. Disc spring unit 1 521 and disc spring unit 2 522 can be designed identically or differently. As shown in the figure, disc spring unit 1 521 is longer than disc spring unit 2 522. Furthermore, the disc spring group should maintain central or axial symmetry to prevent the generation of additional bending moments.

[0073] In the present invention, the disc spring reset device used first provides self-reset capability. As is known to all, the reset force that a single disc spring can provide is very limited, and a larger reset force must be provided by overlapping disc springs. However, the overlapping of a large number of disc springs will cause an unpredictable increase in the friction between the disc spring surfaces, which in turn makes the support performance difficult to predict. The present invention adopts a disc spring group composed of four groups of small disc springs, and the friction of the small disc springs can be effectively controlled. At the same time, when the support is under tension, disc spring unit 2 522 works and disc spring unit 1 521 does not work, which can further reduce the generation of additional friction. Similarly, when the support is under compression, disc spring unit 1 521 works and disc spring unit 2 522 does not work, which can also achieve the above-mentioned effect.

[0074] The disc spring reset device employed in the present invention also imparts a certain degree of bending resistance to the support. Since disc spring unit 2 522 is compressed when the entire support is under tension, and disc spring unit 1 521 is compressed when the entire support is under compression, and considering that the support is not actually connected to the main structure in a completely fixed manner, both ends of the support have a certain degree of rotational capacity. If the entire support is compressed under earthquake action, for example, if the entire 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, disc spring unit 1 521 in the middle of the symmetrical disc spring group is compressed, generating a rebound force that effectively resists the additional bending moment generated.

[0075] See also Figure 2-4 、 Figure 7 In a specific embodiment, the first-order energy dissipation unit 1 of the inner core of the peanut hole mesh adopts two strip steel plates 11. The strip steel plates 11 are convenient for arrangement on the I-shaped steel. The two strip steel plates 11 are respectively arranged on the upper and lower flanges of the two I-shaped steels 31 at the butt connection, and circular holes 111 are opened at both ends of the strip steel plate 11. The upper and lower flanges of the two I-shaped steels 31 are correspondingly opened with circular holes 311. The first-order energy dissipation unit 1 of the inner core of the peanut hole mesh is connected to the I-shaped steel by passing through the circular holes 111 and 311 through the high-strength bolt group 8.

[0076] By opening circular holes at both ends of the strip steel plate 11 corresponding to the upper and lower flanges of the I-shaped steel 31, and connecting and fixing the two with a high-strength bolt group 8, when the I-shaped steel 31 is subjected to tension or compression, the first-order energy dissipation unit 1 in the core of the peanut hole net is simultaneously subjected to tension or compression. The first-order energy dissipation unit 1 in the core of the peanut hole net takes the lead and promptly participates in energy dissipation, that is, first-order energy dissipation, maintains an elastic state under small earthquakes, and enters the plastic energy dissipation stage under medium earthquakes.

[0077] Preferably, the first-order energy dissipation unit 1 of the peanut mesh inner core can be made of high ductility materials such as low yield point steel, aluminum alloy, shape memory alloy, etc.

[0078] Furthermore, to provide better energy dissipation, a weakened zone is formed in the middle of the strip steel plate 11. Specifically, a series of peanut holes are arranged in a horizontal and vertical array on the strip steel plate 11 to create a negative Poisson's ratio effect. This alternating arrangement, with one horizontal hole alternating with another vertical hole, is arranged in multiple rows and columns. Within a row, one horizontal peanut hole alternates with a vertical peanut hole, and within a column, one vertical peanut hole alternates with a horizontal peanut hole. By designing a peanut hole weakening pattern in the central weakened zone and optimizing the aperture ratio, a lightweight design is achieved, reducing deadweight. This also creates a negative Poisson's ratio, causing the inner core to exhibit lateral contraction when subjected to stress. This avoids the buckling instability caused by lateral expansion in traditional structures, achieving a buckling-free effect. Furthermore, this negative Poisson's ratio enhances the ductility of the inner core component, improving its ductility and durability, enabling it to maintain stable performance under multiple seismic loads. Furthermore, this feature optimizes energy dissipation mechanisms, enhancing the structure's energy absorption and seismic resistance under extreme loads. At the same time, by changing the cross-sectional shape of this area so that its bearing capacity is lower than that of the end connection area, the plastic deformation is effectively guided to occur in the middle of the component, preventing excessive plastic deformation or damage in other areas, thereby improving the energy dissipation capacity of the system.

[0079] 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.

[0080] 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.

[0081] Continue to see Figure 2-4 、 Figure 8In a specific embodiment, the second-order energy dissipation unit 2 in the inner core of the peanut hole mesh also adopts two strip steel plates 21. The two strip steel plates 21 are respectively arranged on the left and right sides of the two I-shaped steels 31 at the butt connection. An oblong hole 211 is opened at both ends of the strip steel plate 21, and a circular hole 3 61 is opened correspondingly on the anti-buckling side plate 6. The second-order energy dissipation unit 2 in the inner core of the peanut hole mesh is connected to the anti-buckling side plate 6 by passing through the oblong hole 211 and the circular hole 3 61 through the high-strength bolt group 29.

[0082] As previously mentioned, by providing oblong holes 211 at both ends of the strip steel plate 21 and connecting it to the anti-buckling side plate 6 with a high-strength bolt group 9, the first-order energy dissipation unit 1 in the peanut hole mesh core enters the plastic energy dissipation stage under moderate earthquakes. Under moderate and large earthquakes, the I-shaped self-resetting connection unit 3 and the first-order energy dissipation unit 1 in the peanut hole mesh core generate a relative sliding movement relative to the second-order energy dissipation unit 2 in the peanut hole mesh core within the travel of the oblong hole 211, and are tightened by the bolts. At this time, the second-order energy dissipation unit 2 in the peanut hole mesh core consumes energy. It should be noted that the time the second-order energy dissipation unit 2 in the peanut hole mesh core participates in the force is determined by the length of the oblong hole and can be flexibly adjusted according to actual needs.

[0083] Through the bolt hole opening form described above, the support can show obvious energy dissipation time series characteristics under both compression and tension conditions. It maintains elasticity under small earthquakes, that is, the first-order and second-order energy dissipation cores should be in an elastic state. Under moderate earthquakes, the first-order energy dissipation core enters the plastic energy dissipation stage. Under large earthquakes, the second-order energy dissipation core enters the plastic energy dissipation stage.

[0084] The strip steel plate 21 used in the second-order energy dissipation unit 2 of the peanut hole mesh core also forms a weakened area in the middle. The specific weakening method is the same as that of the first-order energy dissipation unit 1 of the peanut hole mesh core, but the opening size and opening rate of the peanut hole are reasonably determined according to actual conditions.

[0085] Preferably, the second-order energy dissipation unit 2 of the peanut mesh inner core can be made of high ductility materials such as low yield point steel, aluminum alloy, shape memory alloy, etc.

[0086] See also Figure 1 、 Figure 2 、 Figure 9In a specific embodiment, the outer box-type anti-buckling sleeve 4 adopts a box-type steel pipe 41, which is sleeved on the two I-shaped steels 31 at the butt connection, and oblong holes 411 corresponding to the circular holes 111 and the second circular holes 311 are provided at both ends of the top and bottom of the box-type steel pipe 41. The outer box-type anti-buckling sleeve 4 is connected to the first-order energy dissipation unit 1 and the I-shaped self-resetting connection unit 3 of the peanut hole network inner core by passing through the oblong holes 411, the circular holes 111, and the second circular holes 311 through the high-strength bolt group 1. At the same time, oblong holes 412 corresponding to the oblong holes 1 211 and the third circular holes 61 are provided on the left and right sides of the box-type steel pipe 41. The outer box-type anti-buckling sleeve 4 is connected to the second-order energy dissipation unit 2 and the I-shaped self-resetting connection unit 3 of the peanut hole network inner core by passing through the oblong holes 412, the oblong holes 1 211, and the third circular holes 61 through the high-strength bolt group 2 9.

[0087] The outer box-type buckling-resistance sleeve 4 provides good fracture resistance. Since the first-order energy-absorbing inner core is always in a stress state when the support deformation continues to increase, there is still a potential fracture risk under huge earthquakes and large deformations. Even if the first-order energy-absorbing inner core breaks, the force flow can be transmitted from the I-beam to the box-type steel pipe through the high-strength bolts, and then from the box-type steel pipe to the I-beam on the other side, providing the last line of defense.

[0088] In the present invention, the oblong holes 3 412 on the left and right sides of the box-shaped steel pipe 41 are longer than the oblong holes 1 211 at both ends of the strip steel plate 21. In this way, when the first-order energy dissipation unit 1 and the second-order energy dissipation unit 2 of the peanut hole mesh inner core enter the plastic state under a large earthquake, the I-shaped self-resetting connection unit 3 and the first-order energy dissipation unit 1 and the second-order energy dissipation unit 2 of the peanut hole mesh inner core generate a relative sliding relative to the outer box-shaped anti-buckling sleeve 4 within the stroke of the oblong hole 3 412, and are tightened by bolts to provide the last line of defense. It should be noted that the time for the outer box-shaped anti-buckling sleeve 4 to participate in the force is determined by the length of the oblong hole and can be flexibly adjusted according to actual needs.

[0089] In addition, in the present invention, when entering the second-order energy dissipation, the first-order energy dissipation unit 1 of the peanut mesh inner core will continue to be stressed. It is preferably designed that the strip steel plate 11 of the first-order energy dissipation unit 1 of the peanut mesh inner core is longer than the strip steel plate 21 of the second-order energy dissipation unit 2 of the peanut mesh inner core, so as to cope with large deformation with a longer length. At the same time, the first-order energy dissipation unit 1 of the peanut mesh inner core has a limited tolerance range, or breaks earlier than the expected deformation due to initial defects, and the deformation at the time of fracture is greater. The purpose of the peripheral box-shaped anti-buckling sleeve 4 is to restrain and prevent fracture, replacing the first-order energy dissipation unit 1 of the peanut mesh inner core. Therefore, the oblong hole 2 411 at the top and bottom of the box-shaped steel pipe 41 is longer than the oblong hole 3 412 on the left and right sides to accommodate the larger deformation of the first-order energy dissipation unit 1 of the peanut mesh inner core when it breaks.

[0090] Last seen Figure 3 、 Figure 10 The I-shaped self-resetting connection unit 3 is further provided with anti-buckling fork ribs 7 at the butt connection, and four groups of anti-buckling fork ribs 7 are welded around and between the two disc spring baffles 51.

[0091] Specifically, each set of anti-buckling fork ribs 7 is formed by two semi-trapezoidal structures that are forked together, that is, the two semi-trapezoidal structures are relatively forked and respectively welded and fixed to the disc spring baffles 51 on both sides to form a structure similar to an integral trapezoidal structure.

[0092] The present invention will be before assembly Figure 6 The disc spring reset device shown is pre-stressed and anchored to form Figure 5 The disc spring reset device shown is then welded to the ends of two I-beam steel sections 31 to form an I-shaped self-resetting connection unit 3. Finally, the anti-buckling fork ribs 7 and anti-buckling side plates 6 are welded to the I-shaped self-resetting connection unit 3. Simultaneously, the first-order energy dissipation unit 1 and second-order energy dissipation unit 2 of the peanut mesh inner core, as well as the peripheral box-shaped anti-buckling sleeve 4, are manufactured, with circular and oblong holes provided at the corresponding locations. All of the above installation steps should be completed in the prefabrication factory, and only high-strength bolts are required for on-site connection.

[0093] In summary, the present invention provides an I-shaped double-yield point self-resetting buckling restraint support with a built-in self-balancing disc spring assembly and a peanut hole mesh inner core, and its working characteristics are as follows:

[0094] In the initial stage (small earthquake), the support mainly exhibits elastic deformation, the I-shaped self-resetting connection unit 3 is subjected to force, the first-order energy dissipation unit in the peanut hole mesh core and the second-order energy dissipation unit in the peanut hole mesh core are both in an elastic state, and the disc spring reset device provides the reset force. At this time, the second-order energy dissipation unit in the peanut hole mesh core has an allowable sliding stroke due to the use of an oblong hole connection, and the second-order energy dissipation unit in the peanut hole mesh core does not temporarily participate in energy consumption within the sliding stroke.

[0095] During a moderate earthquake, the first-order energy-absorbing units in the peanut hole mesh core begin to yield, providing plastic energy-absorbing capacity, while the self-resetting units continue to function. At this time, the second-order energy-absorbing units in the peanut hole mesh core participate in energy dissipation, or have not yet reached the energy dissipation stage of the second-order energy-absorbing units in the peanut hole mesh core.

[0096] During a major earthquake, the energy-absorbing components fully absorb energy, the first-order energy-absorbing unit and the second-order energy-absorbing unit of the inner core of the peanut hole mesh both yield, the inner core enters plasticity and produces residual deformation, and the outer box-type anti-buckling sleeve 4 participates in the work, providing outer constraints to prevent fracture. The disc spring reset device can prevent or reduce excessive residual deformation of the support, while reducing structural damage and can quickly restore structural function after an earthquake.

[0097] By using the buckling restrained braces of the present invention, inter-layer deformation can be effectively coordinated through reasonable design. That is, buildings arranged with traditional buckling restrained braces have obvious weak layers, and the weak layers have a higher risk of failure under major earthquakes. However, by arranging buildings of the present invention, the weak layer effect can be effectively avoided through reasonable design of the supports for each layer.

[0098] All welding processes in this invention can be completed in a prefabrication plant, which produces standardized "modules." Construction sites simply locate the modules according to the pre-set bolt holes and assemble them using high-strength bolts to complete structural installation. This highly modular construction concept reduces labor and eases construction difficulty, effectively shortening the construction period.

[0099] The present invention can be applied to a single layer, and can also be combined with detachable and replaceable shear walls, energy-absorbing supports, etc. to form a frame-shear wall system and a frame-support system, and can be flexibly applied to multi-story and high-rise building systems.

[0100] 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. An I-shaped double-yield point self-resetting buckling restraint support with a built-in self-balancing disc spring assembly and a peanut hole mesh inner core, characterized in that: Mainly include: The I-shaped self-resetting connection unit is composed of two I-shaped steels butted together by a self-balancing disc spring assembly. When subjected to force, the I-shaped self-resetting connection unit can generate axial displacement and provide a reset force due to the self-balancing disc spring assembly. The first-order energy dissipation unit in the core of the peanut mesh is set on the upper and lower flanges of the two I-shaped steels at the butt connection; The second-order energy dissipation unit in the core of the peanut mesh is set on the left and right sides of the two I-shaped steels at the butt connection; The outer box-shaped buckling-resistance sleeve is sleeved on the two I-shaped steels at the butt joint, with the upper and lower sides connected to the first-order energy dissipation unit of the peanut hole network core and the upper and lower flanges of the two I-shaped steels, and the left and right sides connected to the second-order energy dissipation unit of the peanut hole network core and the left and right sides of the two I-shaped steels; and The first-order energy dissipation unit of the peanut hole mesh inner core is fixedly connected to the I-shaped self-resetting connection unit, and can generate axial sliding of the first displacement relative to the second-order energy dissipation unit of the peanut hole mesh inner core and the peripheral box-type anti-buckling sleeve.

2. The I-shaped double-yield point self-resetting buckling restrained brace according to claim 1 is characterized in that: The I-shaped self-resetting connection unit is welded with anti-buckling side plates on the left and right sides of the two I-shaped steels at the butt connection to form a local box-shaped structure; The two ends of the second-order energy dissipation unit in the peanut mesh inner core are connected to the anti-buckling side plates by bolts; The upper and lower sides of the outer box-shaped anti-buckling sleeve are connected to the first-order energy dissipation unit of the peanut hole mesh inner core and the upper and lower flanges of the two I-shaped steels through bolts, and the left and right sides are connected to the second-order energy dissipation unit of the peanut hole mesh inner core and the anti-buckling side plates through bolts.

3. The I-shaped double-yield point self-resetting buckling restrained brace according to claim 1, characterized in that: The self-balancing disc spring assembly includes two disc spring baffles arranged opposite to each other 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 steels.

4. The I-shaped double-yield point self-resetting buckling restrained brace according to claim 3, characterized in that: Each of the multiple disc spring groups includes a disc spring unit 1, two disc spring units 2 and a disc spring anchor, and the disc spring anchor is passed through the two disc spring baffles, wherein one disc spring unit is set on the disc spring anchor between the two disc spring baffles, and the two disc spring units 2 are respectively set on the disc spring anchor outside the two disc spring baffles.

5. The I-shaped double-yield point self-resetting buckling restrained brace according to claim 1, characterized in that: The first-order energy dissipation unit of the inner core of the peanut hole network adopts two shaped steel plates, the middle part of the two shaped steel plates forms a weakened area, and the weakened area is provided with peanut holes arranged in a horizontal and vertical array; The second-order energy dissipation unit in the inner core of the peanut hole net adopts two strips of shaped steel plates, the middle of the two strips of shaped steel plates form a weakened area, and the weakened area is provided with peanut holes arranged in a horizontal and vertical array.

6. The I-shaped double-yield point self-resetting buckling restrained brace according to claim 5, characterized in that: Two shaped steel plates are respectively provided on the upper and lower flanges of the two I-shaped steels at the butt connection, and circular holes are provided at both ends of the two shaped steel plates. Circular holes are correspondingly provided on the upper and lower flanges of the two I-shaped steels, and are connected by a high-strength bolt group. The two I-shaped steel plates are respectively arranged on the left and right sides of the two I-shaped steels at the butt connection, and the two ends of the two I-shaped steel plates are provided with oblong holes one, and the anti-buckling side plates are correspondingly provided with circular holes three, which are connected by high-strength bolt groups two.

7. The I-shaped double-yield point self-resetting buckling restrained brace according to claim 6, characterized in that: The outer box-type anti-buckling sleeve adopts a box-type steel pipe to be sleeved on two I-shaped steels at the butt connection, and the two ends of the top and bottom of the box-type steel pipe are provided with oblong holes 2 corresponding to the oblong holes 1 and 2, which are connected by a high-strength bolt group 1. At the same time, oblong holes 3 corresponding to the oblong holes 1 and 3 are provided on the left and right sides of the box-type steel pipe, which are connected by a high-strength bolt group 2.

8. The I-shaped double-yield point self-resetting buckling restrained brace according to claim 7, characterized in that: The second oblong hole is longer than the third oblong hole; The third oblong hole is longer than the first oblong hole.

9. The I-shaped double-yield point self-resetting buckling restrained brace according to claim 3, characterized in that: The I-shaped self-resetting connection unit is further provided with anti-buckling fork ribs at the butt connection, and four groups of the anti-buckling fork ribs are welded around and between the two disc spring baffles.

10. The I-shaped double-yield point self-resetting buckling restrained brace according to claim 9, characterized in that: Each group of the anti-buckling fork ribs is formed by two semi-trapezoidal structures being cross-connected with each other.

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