Self-resetting fabricated beam-column joint based on zigzag flange resetting connecting pieces and self-balancing disc spring web connecting pieces

Abstract

The invention provides a self-resetting assembly type beam column joint based on sawtooth-shaped flange resetting connecting pieces and self-balancing disc spring web connecting pieces, and the self-resetting assembly type beam column joint mainly comprises a steel column with a cantilever beam section; a steel beam; the sawtooth-shaped flange self-resetting connecting assembly enables the steel beam and the cantilever beam section to be connected and fixed at the upper flange and the lower flange through sawtooth mechanical occlusion and disc spring bolts, sliding friction energy consumption is achieved through sawtooth mechanical occlusion, and self-resetting is achieved through the disc spring bolts; the self-balancing disc spring web connecting assembly connects and fixes the steel beam and the cantilever beam section at the web through a self-resetting disc spring set, and self-resetting is achieved through the self-resetting disc spring set. The self-resetting beam-column joint provided by the invention has an efficient composite self-resetting function, and can restore to an initial position after an earthquake is ended, so that residual deformation is remarkably reduced, and the post-earthquake repair cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of building structural engineering, and in particular to a self-resetting beam-column joint for use in frame structures. Specifically, the present invention proposes a self-resetting assembled beam-column joint based on a zigzag flange resetting connector and a self-balancing disc spring web connector. The joint is suitable for improving the seismic resistance, energy dissipation, and self-resetting capabilities of building structures under earthquake conditions. Background Art

[0002] In building structural design, beam-column joints are critical components of frame structures, carrying the crucial function of transmitting bending moments, shear forces, and axial forces. Especially during earthquakes, the performance of beam-column joints directly impacts the safety and seismic resistance of the entire structure. Therefore, improving the load-bearing capacity, ductility, energy dissipation, and self-centering capabilities of beam-column joints has long been a research focus in the field of structural engineering.

[0003] Traditional beam-column joints typically utilize rigid or semi-rigid connections. While rigid connections offer high load-bearing capacity, they are prone to brittle failure under earthquakes, leading to structural failure. Semi-rigid connections, while improving ductility, remain limited in their energy dissipation and self-resetting capabilities. Furthermore, traditional joints often require repair or even replacement after an earthquake, increasing maintenance costs and time.

[0004] In recent years, with the development of structural seismic design concepts, self-righting structures have become a research hotspot. By incorporating elastic elements or specialized connectors, these structures effectively absorb energy during earthquakes and automatically return to their initial positions after the quake, minimizing residual deformation and structural damage. This design concept not only improves the seismic performance of structures but also significantly reduces post-earthquake repair costs.

[0005] However, the existing self-centering beam-column joint design still has some shortcomings:

[0006] Insufficient reset capability: Some self-resetting nodes rely on prestressed tendons or other elastic elements to achieve reset function, but due to material performance limitations or unreasonable design, the reset effect may not be ideal, especially in the case of large deformation.

[0007] Single energy dissipation mechanism: Existing designs usually rely solely on frictional energy dissipation or plastic hinge energy dissipation, which makes it difficult to simultaneously meet the requirements of efficient energy dissipation and low residual deformation.

[0008] Complex structure and difficult construction: The design of some self-resetting nodes is too complicated, which increases the difficulty of manufacturing and installation and is not conducive to actual engineering applications.

[0009] Poor economic efficiency: Due to the use of expensive materials or complex structures, the cost of existing self-resetting nodes is high, which limits their promotion and application.

[0010] In view of this, the present invention is proposed Summary of the Invention

[0011] In response to the above problems, the present invention proposes a self-resetting assembled beam-column node based on a zigzag flange resetting connector and a self-balancing disc spring web connector.

[0012] The present invention first provides a self-resetting assembled beam-column node based on a zigzag flange reset connector and a self-balancing disc spring web connector. The self-resetting beam-column node mainly includes:

[0013] Steel columns with cantilever beam sections, both of which are H-shaped / I-shaped;

[0014] Steel beam, the steel beam is H-shaped / I-shaped;

[0015] A serrated flange self-resetting connection assembly, wherein the serrated flange self-resetting connection assembly connects and fixes the steel beam and the cantilever beam section at the upper and lower flanges through serrated mechanical engagement and disc spring bolts, wherein the serrated mechanical engagement realizes sliding friction energy dissipation and the disc spring bolts realize self-resetting;

[0016] A self-balancing disc spring web connection assembly connects and fixes the steel beam and the cantilever beam section at the web through a self-resetting disc spring group, and self-resetting is achieved by the self-resetting disc spring group.

[0017] Preferably, the sawtooth mechanical engagement includes:

[0018] A serrated beam section, wherein the serrated beam section is H-shaped or I-shaped, is welded to the end of the steel beam, and is butted against the cantilever beam section, and both upper and lower flanges of the serrated beam section are provided with serrations;

[0019] A serrated cover plate connects the serrated beam section with the upper and lower flanges of the cantilever beam section, and the serrated cover plate is provided with serrations corresponding to the serrations on the serrated beam section, the serrations on the serrated cover plate are mechanically engaged with the serrations on the serrated beam section and are fixed by disc spring bolts.

[0020] Preferably, the inner and outer sides of the upper and lower flanges of the serrated beam section are both provided with serrations, and the serrated cover plate comprises:

[0021] Two sets of outer cover plates, the two sets of outer cover plates are connected and fixed from the outer sides of the upper and lower flanges of the serrated beam section and the cantilever beam section, and one end of the two sets of outer cover plates is a straight section, which is connected and fixed to the cantilever beam section by a group of high-strength bolts, and the other end is a serrated section, which is connected and fixed to the serrated beam section by a group of disc spring bolts;

[0022] Four groups of inner cover plates are connected and fixed from the inner sides of the upper and lower flanges of the serrated beam section and the cantilever beam section, and one end of the four groups of inner cover plates is a straight section, which is connected and fixed to the cantilever beam section through a group of high-strength bolts, and the other end is a serrated section, which is connected and fixed to the serrated beam section through a group of disc spring bolts.

[0023] Preferably, the upper and lower flanges of the cantilever beam section are provided with circular holes, and one end of the two groups of outer cover plates and the four groups of inner cover plates are provided with corresponding circular holes, and the high-strength bolt group passes through the circular holes on the outer cover plates and the inner cover plates and the circular holes on the cantilever beam section to connect and fix;

[0024] The upper and lower flanges of the serrated beam section are provided with oblong holes, and the other ends of the two groups of outer cover plates and the four groups of inner cover plates are provided with corresponding circular holes. The disc spring bolt group passes through the circular holes on the outer cover plates and the inner cover plates and the oblong holes on the serrated beam section to connect and fix them.

[0025] Preferably, each disc spring bolt of the disc spring bolt group includes a screw rod and disc springs located at both ends of the screw rod, the screw rod passes through the circular holes on the outer cover plate and the inner cover plate and the oblong holes on the serrated beam section, and the two disc springs are anchored to the outer cover plate and the inner cover plate respectively.

[0026] Preferably, the self-resetting disc spring assembly includes:

[0027] A double angle steel, wherein the double angle steel is arranged with two legs facing each other in the longitudinal direction, and the other two legs are in contact with the webs of the cantilever beam section and the serrated beam section;

[0028] A plurality of disc spring groups, wherein both ends of the plurality of disc spring groups are respectively connected to two oppositely arranged limbs of the double angle steel; and

[0029] The double angle steels are symmetrically arranged on both sides of the webs of the cantilever beam section and the serrated beam section, and the other two limbs are fixed by two tension connections of a high-strength bolt group.

[0030] Preferably, the two relatively arranged limbs of the double angle steel are provided with a plurality of through holes for installing the plurality of disc spring groups; the other two limbs of the double angle steel are provided with a plurality of circular holes, and the webs of the cantilever beam section and the serrated beam section are provided with a plurality of circular holes for passing the second high-strength bolt group.

[0031] Preferably, each of the plurality of disc spring groups includes a disc spring unit 1, two disc spring units 2 and a disc spring anchor, wherein the disc spring anchor is passed through the two relatively arranged limbs of the double angle steel, wherein one disc spring unit is set on the disc spring anchor between the two relatively arranged limbs of the double angle steel, and two disc spring units 2 are respectively set on the disc spring anchor outside the two relatively arranged limbs of the double angle steel.

[0032] Preferably, the disc spring anchor is a high-strength steel rod.

[0033] Preferably, the disc spring groups are provided in three groups, and the three groups of disc spring groups are arranged in an equilateral triangle on the two relatively arranged limbs of the double angle steel.

[0034] The beneficial effects of the present invention relative to the prior art are:

[0035] The self-resetting beam-column node provided by the present invention has a highly efficient self-resetting function: through the design of the web self-resetting disc spring group, when the beam section is bent, the upper disc spring is subjected to tension and the lower disc spring is subjected to pressure, storing elastic potential energy during an earthquake, and releasing the elastic potential energy after the earthquake to enable the web to achieve a self-resetting effect; when the serrated beam section in the node area moves and is dislocated, an expansion-like effect occurs in the serrated bite area, and the disc spring bolts connected thereto are subjected to tension, adjusting the bolt pre-tightening force, storing elastic potential energy, and releasing the elastic potential energy after the earthquake, which can enable the serrated beam section in the node area to automatically return to its initial position, significantly reducing residual deformation and lowering post-earthquake repair costs.

[0036] The self-resetting beam-column node provided by the present invention has a multi-stage energy dissipation mechanism: the node design realizes the synergistic effect of mechanical engagement sliding friction energy dissipation (first line of defense), plastic deformation energy dissipation (second line of defense) and web disc spring elastic deformation energy dissipation (third line of defense), forming a multi-level energy dissipation system that effectively disperses and absorbs seismic energy.

[0037] The self-resetting beam-column node provided by the present invention can enhance the local stability of the node domain: the unique design of the serrated cover plate exhibits lateral extension characteristics when under pressure, delays the flange buckling phenomenon, and significantly improves the local stability and shear resistance of the node domain.

[0038] The self-resetting beam-column node provided by the present invention has a controllable sliding range: the design of the oblong hole provides a controllable space for the relative sliding between the serrated cover plate and the serrated beam section flange, avoiding node failure caused by excessive sliding, while ensuring that the sliding friction energy consumption can be fully utilized in the moderate and major earthquake stages.

[0039] The self-resetting beam-column node provided by the present invention adopts a modular design, which is easy to construct and maintain. It adopts high-strength bolt connection, and the components can be quickly assembled and disassembled, which is convenient for on-site construction and subsequent maintenance or replacement, and significantly improves construction efficiency.

[0040] 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

[0041] 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.

[0042] 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.

[0043] Figure 1 A three-dimensional diagram of a self-resetting assembled beam-column joint based on a zigzag flange resetting connector and a self-balancing disc spring web connector;

[0044] Figure 2 This is an exploded view of a self-resetting assembled beam-column joint based on a zigzag flange reset connector and a self-balancing disc spring web connector;

[0045] Figure 3 It is a front view of a self-resetting assembled beam-column joint based on a zigzag flange reset connector and a self-balancing disc spring web connector;

[0046] Figure 4 A top view of a self-resetting assembled beam-column joint based on a zigzag flange reset connector and a self-balancing disc spring web connector;

[0047] Figure 5 A three-dimensional diagram of a serrated cover plate for a self-resetting assembled beam-column joint based on a serrated flange reset connector and a self-balancing disc spring web connector;

[0048] Figure 6 A three-dimensional diagram of a disc spring bolt group for a self-resetting assembled beam-column joint based on a zigzag flange reset connector and a self-balancing disc spring web connector;

[0049] Figure 7 A three-dimensional diagram of a self-resetting disc spring assembly for a self-resetting assembled beam-to-column node based on a zigzag flange reset connector and a self-balancing disc spring web connector.

[0050] Markings in the figure:

[0051] Steel column 1, steel beam 2, cantilever beam section 3, serrated flange self-resetting connection assembly 4, serrated beam section 41, oblong hole 411, disc spring bolt group 42, serrated cover plate 43, outer cover plate 431, inner cover plate 432, self-balancing disc spring web connection assembly 5, self-resetting disc spring group 51, double angle steel 511, disc spring group 512, disc spring unit one 5121, disc spring unit two 5122, disc spring anchor 5123, high-strength bolt group one 6, high-strength bolt group two 7.

[0052] In the various drawings, the same or corresponding reference numerals denote the same or corresponding parts. DETAILED DESCRIPTION

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] As mentioned in the background technology, the existing self-resetting beam-column node design still has shortcomings such as insufficient reset capacity, a single energy dissipation mechanism, a complex structure, difficult construction, and poor economic efficiency, which limit its promotion and application. Based on this, the present invention proposes a self-resetting assembled beam-column node based on a serrated flange reset connector and a self-balancing disc spring web connector. This design introduces a serrated structure and a special web connector into the beam section, combining a composite self-resetting mechanism of disc spring elastic self-resetting and serrated mechanical bite self-resetting, aiming to solve the problems of insufficient reset capacity, single energy dissipation mechanism, complex structure, and poor economic efficiency in the existing technology, and provide a high-efficiency, reliable, and economical self-resetting beam-column node solution for building structures.

[0059] The following is a detailed description of the specific implementation and preferred solution of the self-resetting assembled beam-column node proposed by the present invention based on a serrated flange reset connector and a self-balancing disc spring web connector.

[0060] like Figure 1-7 As shown, the present invention proposes a self-resetting assembled beam-column joint based on a zigzag flange reset connector and a self-balancing disc spring web connector, which mainly includes: a steel column 1, a steel beam 2, a cantilever beam section 3 on steel column 1, both steel column 1 and cantilever beam section 3 being H-shaped / I-shaped, and steel beam 2 also being H-shaped / I-shaped; the cantilever beam section 3 is welded to the steel column 1, and the steel beam 2 is connected and fixed to the steel column 1 by means of the cantilever beam section 3, forming a beam-column frame structure system. To ensure the connection strength and rigidity at the node of steel column 1, two node domain stiffening ribs (four for a total of two on either side of the web) are welded between the two flanges at the position on steel column 1 corresponding to the cantilever beam section 3, and the two stiffening ribs are aligned with the upper and lower flanges of the cantilever beam section 3.

[0061] The difference of the present invention is that the self-resetting beam-column node is provided with a serrated flange self-resetting connection component 4 and a self-balancing disc spring web connection component 5. It is easy to understand that the serrated flange self-resetting connection component 4 is used to connect the flanges and has the self-resetting characteristics of the serrated disc spring, and the self-balancing disc spring web connection component is used to connect the web and has the self-resetting characteristics of the disc spring. Specifically, the serrated flange self-resetting connection component 4 connects and fixes the steel beam 2 and the cantilever beam section 3 at the upper and lower flanges through a serrated mechanical bite and a disc spring bolt. The serrated mechanical bite realizes sliding friction energy dissipation, and the disc spring bolt realizes self-resetting; the self-balancing disc spring web connection component 5 connects and fixes the steel beam 2 and the cantilever beam section 3 at the web through a self-resetting disc spring group, and realizes self-resetting by the self-resetting disc spring group.

[0062] With such a design, the beam-column node of the present invention has a highly efficient self-resetting function: on the one hand, when the steel beam flange in the node area moves and is dislocated, the serrated bite area will have an expansion-like effect, and the disc spring bolts connected thereto will be subjected to tension. By adjusting the pre-tightening force of the disc spring bolts, elastic potential energy is stored and released after the earthquake. On the other hand, the web of the steel beam in the node area is designed with a self-resetting disc spring group. When the beam section is subjected to positive bending moment (for example, the mid-span area is subjected to downward load), the upper disc spring is tensile and the lower disc spring is compressed. When the beam section is subjected to negative bending moment (for example, the root area of the cantilever beam or near the support of the continuous beam), the upper disc spring is compressed and the lower disc spring is tensile. In this way, elastic potential energy is stored during an earthquake, and after the earthquake, the elastic potential energy is released to enable the web to achieve a self-resetting effect, which can enable the steel beam in the node area to automatically return to its initial position, significantly reduce residual deformation, and reduce post-earthquake repair costs.

[0063] In some embodiments, see Figure 2The serrated mechanical engagement of the serrated flange self-resetting connection assembly 4 is specifically achieved by adding a serrated beam section 41. The serrated beam section 41 is H-shaped / I-shaped like the steel beam 2. The serrated beam section 41 is welded and fixed to the end of the steel beam 2. It is used to dock with the cantilever beam section 3 during connection, and the upper and lower flanges of the serrated beam section 41 are both provided with serrations; at the same time, a serrated cover plate 43 is provided, and the serrated cover plate 43 connects the upper and lower flanges of the serrated beam section 41 with the upper and lower flanges of the cantilever beam section 3, and the serrated cover plate 43 is provided with serrations corresponding to the serrations on the serrated beam section 41. The serrations on the serrated cover plate 43 are mechanically engaged with the serrations on the serrated beam section 41 and are connected and fixed by a disc spring bolt group 42. Thus, at the steel beam flange in the node area, on the one hand, during deformation, the serrated engagement expands, dissipating sliding friction energy, while the disc spring bolts store elastic potential energy, which is released to reset after the earthquake. During reset, the serrated engagement uses geometric constraints to ensure the accuracy of the reset path. The two work together to achieve self-reset, with the disc spring reset force providing the dominant force. Furthermore, because the cross-section of the serrated cover plate and the serrated beam section are both somewhat weakened compared to the flat web, plastic deformation occurs preferentially in this area, dissipating energy through plastic deformation. Furthermore, the serrated cover plate's large deformation ductility further dissipates energy and disperses stress concentration, preventing brittle failure of the flange.

[0064] Preferably, in the embodiment of the present invention, serrations are provided on the inner and outer sides of the upper and lower flanges of the serrated beam section 41. Correspondingly, the serrated cover plate 43 includes an outer cover plate 431 and an inner cover plate 432. It is easy to understand that the outer cover plate 431 is connected from the outer side of the flange, and the inner cover plate 432 is connected from the inner side of the flange, that is, the two sets of outer cover plates 431 are connected and fixed from the outer sides of the upper and lower flanges of the serrated beam section 41 and the cantilever beam section 3, and one end of the two sets of outer cover plates 431 is a straight section (such as Figure 2 、 Figure 3 The left end of the cantilever beam section 3 is connected and fixed by a high-strength bolt group 6 (such as Figure 2 、 Figure 3 6 high-strength bolts on each of the upper and lower flanges), and the other end is a serrated section (such as Figure 2 、 Figure 3 The right end of the middle flange is connected and fixed to the serrated beam section 41 by a disc spring bolt group 42 (six disc spring bolts on each of the upper flange and the lower flange).

[0065] Correspondingly, the four groups of inner cover plates 432 are connected and fixed from the inner sides of the upper and lower flanges of the serrated beam section 41 and the cantilever beam section 3, and one end of the four groups of inner cover plates 432 is a straight section, which is connected and fixed to the cantilever beam section 3 through a high-strength bolt group 6, and the other end is a serrated section, which is connected and fixed to the serrated beam section 41 through a disc spring bolt group 42.

[0066] The so-called sawtooth in the present invention is easy to understand, that is, a continuous concave-convex structure, or a wave structure, a corrugated structure, etc., which can achieve mechanical engagement.

[0067] It should be noted that the outer cover plate 431 covers the upper and lower flanges from the outside, with its serrated section provided on the inner surface of the outer cover plate 431. The inner cover plate 432 covers the upper and lower flanges from the inside, with its serrated section provided on the outer surface of the inner cover plate 432, thereby correspondingly engaging with the inner and outer surfaces of the upper and lower flanges of the serrated beam section 41. It is easy to understand that the so-called inside and outside are relative terms, with the inner side being the side facing inward from the upper and lower flanges, and the outer side being the side facing outward from the upper and lower flanges.

[0068] like Figure 2 、 Figure 5 As shown in the figure, the two outer cover plates 431 are large cover plates, the width of which is consistent with the flange width of the cantilever beam section 3 and the serrated beam section 41, and the length is determined according to requirements to completely cover the upper and lower flanges; the four inner cover plates 432 are small cover plates, the width of which is consistent with the flange width of the cantilever beam section 3 and the serrated beam section 41 on one side of the web, and the length is determined according to requirements.

[0069] It should also be noted that the serrated sections on the outer cover plate 431 and the inner cover plate 432 are the same length as the serrated beam section 41, and should at least completely cover the serrated beam section 41, or be longer than the serrated beam section 41, so as to provide sufficient engagement space (stroke) when the flange moves and is misaligned.

[0070] More specifically, the upper and lower flanges of the cantilever beam section 3 are each provided with 6 circular holes, and one end of the two groups of outer cover plates 431 and the four groups of inner cover plates 432 are each provided with 6 circular holes. A group of high-strength bolts 16 pass through the circular holes on the outer cover plates 431 and the inner cover plates 432 as well as the circular holes on the cantilever beam section 3 to connect and fix them; the upper and lower flanges of the cantilever beam section 3 are connected and fixed through the circular holes to limit sliding here and maintain the stiffness and stability of the node.

[0071] The upper and lower flanges of the serrated beam section 41 are each provided with oblong holes 411. The other ends of the two sets of outer cover plates 431 and the four sets of inner cover plates 432 are each provided with corresponding circular holes. Disc spring bolts 42 pass through the circular holes in the outer and inner cover plates, as well as the oblong holes 411 in the serrated beam section, to secure the connection. When the sawtooth meshes and dissipate sliding friction energy, the oblong holes provide a controllable sliding range, creating a controlled space for relative sliding between the serrated cover plates 43 and the flanges of the serrated beam section 41, preventing node failure due to excessive sliding. This ensures that the sliding friction energy dissipation is fully utilized during moderate and severe earthquakes, ensuring that the node maintains a certain degree of stability and safety even under extreme conditions.

[0072] Two oblong holes 411 are provided on each of the upper and lower flanges of the serrated beam section 41, extending longitudinally along the serrated beam section 41 and symmetrically arranged on either side of the web of the serrated beam section 41 for symmetrically mounting the disc spring bolt groups 42. Multiple oblong holes 411 may be provided, for example, six independent oblong holes 411 may be provided for six disc spring bolts. In the embodiment of the present invention, a single, integral, strip-shaped through-hole is provided. This integral through-hole allows the bolts to slide along their entire length, resulting in more uniform sliding friction and reduced localized stress concentration.

[0073] See also Figure 6 The disc spring bolt group 42 consists of 6 disc spring bolts, each of which includes a screw and disc springs at both ends of the screw. The screw passes through the circular holes on the outer cover plate 431 and the inner cover plate 432 and the oblong hole 411 on the serrated beam section 41. The two disc springs are anchored on the outer cover plate 431 and the inner cover plate 432 respectively. Figure 3 、 Figure 5 The disc spring bolt can be pre-designed with a preload force that can be adjusted as needed.

[0074] See also Figure 1 、 Figure 7 In some embodiments, the self-resetting disc spring group 51 includes: a double angle steel 511 and a plurality of disc spring groups 512. The double angle steel 511 includes two angle steels, which can be referred to as a first angle steel and a second angle steel. The two angle steels are arranged with two limbs opposite to each other along the longitudinal direction of the steel beam. The figure better shows that the two limbs are arranged back to back, and the other two limbs fit the webs of the cantilever beam section 3 and the serrated beam section 41; the two ends of the plurality of disc spring groups 512 are respectively connected to the two oppositely arranged limbs of the double angle steel 511 to connect the two angle steels into a whole; the double angle steel 511 is symmetrically arranged on both sides of the webs of the cantilever beam section 3 and the serrated beam section 41, that is, a total of four angle steels and their corresponding disc spring groups 512 are arranged on both sides of the web, and the four angle steels are fixed on both sides of the web by a high-strength bolt group 7 passing through the other two limbs for tension connection.

[0075] Preferably, the two relatively arranged limbs of the double angle steel 511 are provided with a plurality of through holes for installing a plurality of disc spring groups 512; the other two limbs of the double angle steel 511 are provided with a plurality of circular holes, and the webs of the cantilever beam section 3 and the serrated beam section 41 are provided with a plurality of circular holes for passing a high-strength bolt group 2 7.

[0076] Preferably, triangular steel plates are welded to the edges of each angle steel of the double angle steel 511, and multiple triangular steel plates are welded in the middle to divide the interior of the angle steel into multiple spaces. This strengthens the overall strength of the angle steel and prevents deformation during tension pre-tightening. At the same time, the interior is divided into multiple spaces to accommodate a corresponding disc spring group 512. In this embodiment of the present invention, two triangular steel plates are welded inside each angle steel to divide it into three spaces, and three corresponding disc spring groups 512 are provided. The three disc spring groups 512 are arranged in a triangular shape on the two opposite limbs of the double angle steel 511, such as an isosceles triangle or an equilateral triangle.

[0077] like Figure 7 As shown, specifically, each disc spring group 512 includes a disc spring unit 1 5121, two disc spring units 2 5122 and a disc spring anchor 5123. The disc spring anchor 5123 is passed through the two relatively arranged limbs of the double angle steel 511. The two relatively arranged limbs of the double angle steel 511 are correspondingly provided with through holes. The disc spring anchor 5123 adopts a high-strength steel rod and is passed through the through holes of the two limbs. A disc spring unit 1 5121 is sleeved on the rod between the two limbs, one disc spring unit 2 5122 is sleeved on the rod in one of the angle steels, and the other disc spring unit 2 5122 is sleeved on the rod in the other angle steel, and the two ends of the rod are anchored and fixed.

[0078] During installation, the three disc spring groups 512 should first be pre-compressed and anchored to form the self-resetting disc spring group 51, and then the two self-resetting disc spring groups 51 are installed on the web through the high-strength bolt group 7.

[0079] The number and size of disc spring group 512 are determined according to design requirements. Disc spring unit 1 5121 and disc spring unit 2 5122 can be designed identically or differently. As shown in the figure, disc spring unit 1 5121 is designed to be longer than disc spring unit 2 5122. Furthermore, disc spring group 512 should maintain central symmetry or axial symmetry to prevent the generation of additional bending moments.

[0080] In the present invention, the self-resetting disc spring group 51 used first provides self-resetting capability. As is well known, 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 supporting performance difficult to predict. The present invention adopts three groups of disc spring groups 512, and the friction force of a single group of disc spring groups can be effectively controlled. At the same time, when the disc spring group 512 is pulled, the disc spring unit 2 5122 works, and the disc spring unit 1 5121 does not work, which can further reduce the generation of additional friction. Similarly, when the disc spring group 512 is compressed, the disc spring unit 1 5121 works, and the disc spring unit 2 5122 does not work, which can also achieve the above-mentioned effect.

[0081] The self-resetting disc spring assembly 51 employed in the present invention also imparts a certain degree of bending resistance to the node. Because disc spring unit 2 5122 is compressed when disc spring group 512 is tensioned, and disc spring unit 1 5121 is compressed when disc spring group 512 is compressed, and given that the node connection is not completely fixed but rather has a certain degree of rotational capability, if the self-resetting disc spring assembly 51 is compressed during an earthquake, for example, "bent" by the earthquake force, the ends may rotate, generating a bending moment in the middle. At this point, disc spring unit 1 5121 in the middle of the symmetrical disc spring assembly is compressed, generating a rebound force that effectively resists the additional bending moment.

[0082] In summary, the present invention provides a self-resetting assembled beam-column joint based on a zigzag flange reset connector and a self-balancing disc spring web connector, and its working characteristics are as follows:

[0083] During minor earthquakes, the seismic input energy is relatively small, and the node remains elastic as a whole. When the steel beam bends, the upper disc spring of the self-resetting disc spring assembly at the web is subjected to tension, while the lower disc spring is subjected to compression, resulting in nonlinear elastic deformation and storing elastic potential energy. After the earthquake, this elastic potential energy is released to restore the web to its original position. The disc spring adjusts the preload of the bolts through slight elastic deformation, ensuring close contact between the serrated cover plate and the serrated beam segment, maintaining the stiffness and stability of the node. At this time, sliding friction energy dissipation has not yet been activated, but the design of the oblong hole reserves space for controlled sliding during subsequent moderate and major earthquakes. The mechanical engagement between the serrated cover plate and the serrated beam segment increases the frictional resistance of the contact surface, delaying the relative sliding of the node under the action of bending moment, thereby maintaining the stiffness and stability of the node during minor earthquakes and ensuring the integrity and functionality of the structure under minor earthquakes.

[0084] During the major earthquake stage, the energy input from the earthquake reaches its peak, and the node enters a distinct plastic working state. The sliding amplitude between the serrated cover plate and the serrated beam section further increases, and the sliding friction energy consumption reaches its maximum value, becoming one of the most important energy dissipation modes. The serrated beam section may undergo significant plastic deformation, absorbing a large amount of seismic energy through material yielding. The double angle steel of the self-resetting disc spring group at the web enters the plastic bending stage, forming a third line of defense for energy dissipation. The disc spring continues to rebound during this stage, compensating for the attenuation of the bolt preload caused by the earthquake and preventing node failure. The large deformation and ductility characteristics of the serrated cover plate further dissipate energy and disperse stress concentration, avoiding brittle failure of the flange. The oblong hole design plays a full role in this stage, allowing controlled sliding to ensure that the node can still maintain a certain degree of stability and safety under extreme conditions.

[0085] 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.

[0086] Although several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present invention. Certain features described in the context of separate embodiments may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented in multiple implementations individually or in any suitable sub-combination.

Claims

1. A self-resetting assembled beam-column joint based on a sawtooth flange reset connector and a self-balancing disc spring web connector, characterized in that: The self-centering beam-column joint mainly includes: Steel columns with cantilever beam sections, both of which are H-shaped / I-shaped; Steel beam, the steel beam is H-shaped / I-shaped; A serrated flange self-resetting connection assembly, wherein the serrated flange self-resetting connection assembly connects and fixes the steel beam and the cantilever beam section at the upper and lower flanges through serrated mechanical engagement and disc spring bolts, wherein the serrated mechanical engagement realizes sliding friction energy dissipation and the disc spring bolts realize self-resetting; A self-balancing disc spring web connection assembly connects and fixes the steel beam and the cantilever beam section at the web through a self-resetting disc spring group, and self-resetting is achieved by the self-resetting disc spring group.

2. The self-resetting beam-column node according to claim 1, characterized in that: The sawtooth mechanical engagement includes: A serrated beam section, wherein the serrated beam section is H-shaped or I-shaped, is welded to the end of the steel beam, and is butted against the cantilever beam section, and both upper and lower flanges of the serrated beam section are provided with serrations; A serrated cover plate connects the serrated beam section with the upper and lower flanges of the cantilever beam section, and the serrated cover plate is provided with serrations corresponding to the serrations on the serrated beam section, the serrations on the serrated cover plate are mechanically engaged with the serrations on the serrated beam section and are fixed by disc spring bolts.

3. The self-resetting beam-column node according to claim 2, characterized in that: The inner and outer sides of the upper and lower flanges of the serrated beam section are both provided with serrations, and the serrated cover plate comprises: Two sets of outer cover plates, the two sets of outer cover plates are connected and fixed from the outer sides of the upper and lower flanges of the serrated beam section and the cantilever beam section, and one end of the two sets of outer cover plates is a straight section, which is connected and fixed to the cantilever beam section by a group of high-strength bolts, and the other end is a serrated section, which is connected and fixed to the serrated beam section by a group of disc spring bolts; Four groups of inner cover plates are connected and fixed from the inner sides of the upper and lower flanges of the serrated beam section and the cantilever beam section, and one end of the four groups of inner cover plates is a straight section, which is connected and fixed to the cantilever beam section through a group of high-strength bolts, and the other end is a serrated section, which is connected and fixed to the serrated beam section through a group of disc spring bolts.

4. The self-resetting beam-column node according to claim 3, characterized in that: The upper and lower flanges of the cantilever beam section are each provided with a circular hole, and one end of the two groups of outer cover plates and the four groups of inner cover plates are each provided with a corresponding circular hole, and the high-strength bolt group is passed through the circular holes on the outer cover plates and the inner cover plates and the circular holes on the cantilever beam section to connect and fix; The upper and lower flanges of the serrated beam section are provided with oblong holes, and the other ends of the two groups of outer cover plates and the four groups of inner cover plates are provided with corresponding circular holes. The disc spring bolt group passes through the circular holes on the outer cover plates and the inner cover plates and the oblong holes on the serrated beam section to connect and fix them.

5. The self-resetting beam-column node according to claim 3, characterized in that: Each disc spring bolt of the disc spring bolt group includes a screw rod and disc springs located at both ends of the screw rod. The screw rod passes through the circular holes on the outer cover plate and the inner cover plate and the oblong holes on the serrated beam section. The two disc springs are anchored to the outer cover plate and the inner cover plate respectively.

6. The self-resetting beam-column node according to claim 2, characterized in that: The self-resetting disc spring assembly includes: A double angle steel, wherein the double angle steel is arranged with two legs facing each other in the longitudinal direction, and the other two legs are in contact with the webs of the cantilever beam section and the serrated beam section; A plurality of disc spring groups, wherein both ends of the plurality of disc spring groups are respectively connected to two oppositely arranged limbs of the double angle steel; and The double angle steels are symmetrically arranged on both sides of the webs of the cantilever beam section and the serrated beam section, and the other two limbs are fixed by two tension connections of a high-strength bolt group.

7. The self-resetting beam-column node according to claim 6, characterized in that: The two relatively arranged limbs of the double angle steel are provided with a plurality of through holes for installing the plurality of disc spring groups; the other two limbs of the double angle steel are provided with a plurality of circular holes, and the webs of the cantilever beam section and the serrated beam section are provided with a plurality of circular holes for passing the second high-strength bolt group.

8. The self-resetting beam-column node according to claim 6, 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 relatively arranged limbs of the double angle steel, wherein one disc spring unit is set on the disc spring anchor between the two relatively arranged limbs of the double angle steel, and two disc spring units 2 are respectively set on the disc spring anchor outside the two relatively arranged limbs of the double angle steel.

9. The self-resetting beam-column node according to claim 8, characterized in that: The disc spring anchor is a high-strength steel rod.

10. The high ductility double yield point energy dissipation coupling beam according to claim 6, characterized in that: The disc spring groups are provided in three groups, and the three disc spring groups are arranged in an equilateral triangle on the two relatively arranged limbs of the double angle steel.

Images