Modularized steel structure buckling-restrained multi-stage energy dissipation beam column joint and transformer substation

Abstract

The invention relates to the technical field of steel structure connecting joints, in particular to a modular steel structure buckling-restrained multi-step energy dissipation beam column joint and a transformer substation, which are suitable for connecting cross beams and stand columns and comprise hinge pieces and energy dissipation assemblies, and first energy dissipation plates comprise the first energy dissipation plate and the second energy dissipation plate; when the swing strength of the cross beam around the axis of the hinge piece relative to the stand column reaches a first threshold value, the first energy consumption plate is bent. When the swing strength of the cross beam around the axis of the hinge piece relative to the stand column reaches a second threshold value, the second energy consumption plate is bent, and the second threshold value is larger than the first threshold value. The method has the beneficial effects that by controlling the local buckling instability behavior of the beam-column joint energy dissipation plate, the bearing capacity is independently regulated and controlled while the initial rigidity of the joint is not changed, and the energy dissipation capacity of the joint is effectively improved; by means of the technical scheme, the problems that plastic hinges at the ends of the beams move outwards and the stand columns and the beams collide and conflict can be solved, and reliability is improved.

Description

Technical Field

[0001] This invention relates to the technical field of steel structure connection nodes, and more particularly to a modular steel structure buckling-resistant multi-stage energy-dissipating beam-column node and a substation. Background Technology

[0002] Beam-column joints are a crucial part of building structures, responsible for firmly connecting beams and columns to ensure the overall stability and safety of the building.

[0003] Currently, to improve the performance of structural beams, energy dissipation nodes are often set at the beam ends. However, the energy dissipation nodes used in existing traditional prefabricated steel structures are mainly designed around the seismic concept of strong column-weak beam, strong shear-weak bending, and strong node-weak component. Existing energy dissipation connection nodes have the following problems: while focusing on improving energy dissipation, the stiffness of the node will also increase. Under seismic loads, excessive node stiffness will cause the building components around the node to fail before the node, which is not conducive to the overall continuity and stability of the building structure. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a modular steel structure buckling-resistant multi-stage energy-dissipating beam-column joint and substation, which solves the technical problem that in the prior art, while the connection node improves the energy dissipation target, the stiffness of the node will also increase. Under seismic load, the excessive stiffness of the node will cause the building components around the node to fail before the node, which is not conducive to the overall continuity and stability of the building structure.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] In a first aspect, the present invention provides a modular steel structure buckling-resistant multi-stage energy-dissipating beam-column joint, suitable for connecting a beam and a column, comprising a hinge, an energy-dissipating component, and an energy-dissipating plate including a first energy-dissipating plate and a second energy-dissipating plate. The hinge is suitable for hinged to the beam and the column in a front-to-back direction. The energy-dissipating component is disposed on both vertical sides of the hinge to rigidly connect the beam and the column. The first energy-dissipating plate extends in a vertical plane, with its two ends fixedly connected to the beam and the column, respectively. The second energy-dissipating plate extends in a transverse plane. Both ends of the first and second energy-dissipating plates are fixedly connected to the beam and the column, respectively. Wherein, when the swing intensity of the beam relative to the column about the axis of the hinge reaches a first threshold, the first energy-dissipating plate buckles, and the second energy-dissipating plate is in an elastic stage. When the swing intensity of the beam relative to the column about the axis of the hinge reaches a second threshold, the second energy-dissipating plate buckles, and the second threshold is greater than the first threshold.

[0009] In one technical solution of the present invention, the energy dissipation component further includes a constraint sleeve, which is fitted onto the first energy dissipation plate and the second energy dissipation plate in a corresponding manner. The constraint sleeve is adapted to abut against the extension surfaces of the first energy dissipation plate and the second energy dissipation plate through its inner wall to limit the buckling amount of the two plates. When the first energy dissipation plate and the second energy dissipation plate are in a non-buckling state, there is a predetermined distance between the inner wall of the constraint sleeve and the extension surfaces of the first energy dissipation plate and the second energy dissipation plate.

[0010] In one technical solution of the present invention, two sets of transversely spaced contact portions are formed inside the constraint sleeve. Each contact portion includes two sets of vertically spaced protrusions. The two sets of protrusions are respectively fixedly connected to two opposing inner walls of the constraint sleeve. The first energy dissipation plate and the second energy dissipation plate are located between the vertical spacing of the corresponding two sets of protrusions, so that when the first energy dissipation plate and the second energy dissipation plate are in a non-buckling state, there is a predetermined distance between the inner wall of the corresponding constraint sleeve and the extension surface of the corresponding first energy dissipation plate and the second energy dissipation plate.

[0011] In one technical solution of the present invention, the surfaces opposite the protrusions are both spherical.

[0012] In one technical solution of the present invention, the first energy-consuming board and the second energy-consuming board are both integral structures, and are both divided into a middle section in the middle and an outer section at both ends of the middle section. The two sets of contact parts correspond to the positions where the middle section and the outer section are connected to each other; wherein, the length of the middle section is greater than the length of the outer section.

[0013] In one technical solution of the present invention, the state before buckling of the first energy dissipation plate and the second energy dissipation plate is the initial state, and the state during buckling includes the first state and the second state in sequence; in the initial state, both the middle section and the outer section maintain flexural deformation toward the first side; in the first state, the middle section buckles and deforms toward the first side, and the outer section extends along the length direction of the first energy dissipation plate or the second energy dissipation plate; in the second state, the middle section buckles and deforms toward the first side, and the outer section buckles and deforms toward the second side; the first side is a side that is away from one extension surface of the first energy dissipation plate and the second energy dissipation plate, and the second side is a side that is away from the other extension surface of the first energy dissipation plate and the second energy dissipation plate.

[0014] In one technical solution of the present invention, the constraint sleeve includes two sets of opposing and parallel limiting plates and two sets of opposing and parallel connecting plates. The ends of the limiting plates and the connecting plates are alternately fixedly connected to form a rectangular frame structure, which can be sleeved on the outside of the first energy dissipation plate and / or the second energy dissipation plate, and the contact part is fixedly connected to the limiting plate.

[0015] In one technical solution of the present invention, the beam-column joint further includes connecting bolts, multiple reinforcing plates, and multiple partition plates. One end of the energy-dissipating component forms a vertically extending connecting flange, which is fixedly connected to the side wall of the column by connecting bolts; wherein the head of the connecting bolt is located inside the column; multiple reinforcing plates extend laterally and are fixedly connected to the inside of the column at vertical intervals, forming bolt channels between adjacent reinforcing plates; multiple partition plates extend vertically and are fixedly connected to the reinforcing plates, and are all located within adjacent bolt channels; wherein the bolt channels correspond to the lateral extension lines of the connecting bolts, and when the head of the connecting bolt slides into the column, the partition plate can abut against the head of the connecting bolt before the connecting bolt slides into the column.

[0016] In one technical solution of the present invention, the first energy-consuming plate is two sets located on the front and rear sides of the second energy-consuming plate.

[0017] Secondly, the present invention provides a substation comprising a steel structure, the steel structure including beams and columns, wherein the beams and columns are connected by modular steel structure buckling-resistant multi-stage energy-dissipating beam-column joints as described above.

[0018] The hinge is hinged to the end of the beam and the side wall of the column; the energy dissipation component is set on the vertical side of the hinge, and the ends of the first energy dissipation plate and the second energy dissipation plate are respectively fixedly connected to the end of the beam and the side wall of the column.

[0019] (III) Beneficial Effects

[0020] The beneficial effects of this invention are: the modular steel structure buckling-resistant multi-stage energy-dissipating beam-column joint of this invention controls the local buckling instability behavior of the energy-dissipating plate of the beam-column joint, while ensuring that the initial stiffness of the joint remains unchanged, and achieves independent control of the bearing capacity, effectively improving the energy dissipation capacity of the joint; through this technical solution, the problems of plastic hinge displacement at the end of the beam and collision between the column and the beam can be avoided, thus improving reliability. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the column, beam, and nodes of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the node of the present invention;

[0023] Figure 3 This is a schematic diagram of the energy-consuming component of the present invention;

[0024] Figure 4 This is a schematic diagram of the first and second energy-consuming boards of the present invention in their initial state.

[0025] Figure 5 For the present invention Figure 4 A schematic diagram at point A in the middle;

[0026] Figure 6 This is a schematic diagram of the first and second energy-consuming boards of the present invention in a first state;

[0027] Figure 7 For the present invention Figure 6 A schematic diagram at point A in the middle;

[0028] Figure 8 This is a schematic diagram of the first and second energy-consuming boards of the present invention in a second state;

[0029] Figure 9 For the present invention Figure 8 A schematic diagram at point A in the middle;

[0030] Figure 10 This is a schematic diagram of the internal structure of the column and the connecting bolts of the present invention.

[0031] Explanation of reference numerals in the attached figures

[0032] 100: Horizontal beam; 200: Vertical column;

[0033] 1: Hinged joint;

[0034] 2: Energy-consuming components;

[0035] 21: First energy-consuming plate; 22: Second energy-consuming plate; 202: Middle section; 204: Outer section;

[0036] 23: Constraint sleeve; 230: Contact part; 2301: Protrusion;

[0037] 231: Limiting plate; 232: Connecting plate;

[0038] 3: Connecting bolts;

[0039] 4: Reinforcing plate;

[0040] 5: Divider. Detailed Implementation

[0041] To better explain and facilitate understanding of this invention, the following description is provided in conjunction with the appendix. Figures 1-10 The present invention will be described in detail through specific embodiments. In this document, directional terms such as "upper" and "lower" are used interchangeably with other directional terms. Figure 1 The orientation is taken as a reference, and includes the two types of energy-consuming boards, namely the first energy-consuming board 21 and the second energy-consuming board 22, which are simply referred to as energy-consuming boards.

[0042] Example 1:

[0043] Reference Figures 1-10The embodiments of the present invention provide a modular steel structure buckling-resistant multi-stage energy-dissipating beam-column joint, suitable for connecting a beam 100 and a column 200, including a hinge 1, an energy-dissipating component 2, the energy-dissipating component 2 including a first energy-dissipating plate 21 extending in a vertical plane and a second energy-dissipating plate 22 extending in a transverse plane.

[0044] Hinge 1 is adapted to be hinged to the end of beam 100 and the side wall of column 200. Energy dissipation assembly 2 is disposed on one vertical side of hinge 1, preferably on both vertical sides, to rigidly connect beam 100 and column 200. The first energy dissipation plate 21 and the second energy dissipation plate 22 are respectively fixedly connected to the end of beam 100 and the side wall of column 200 at both ends. When the swing intensity of beam 100 relative to column 200 about the axis of hinge 1 reaches a first threshold, the first energy dissipation plate 21 buckles, and the second energy dissipation plate 22 is in an elastic stage. When the swing intensity of beam 100 relative to column 200 about the axis of hinge 1 reaches a second threshold, the second energy dissipation plate 22 buckles, and the second threshold is greater than the first threshold.

[0045] The first energy-consuming plate (21) has a greater slenderness ratio than the second energy-consuming plate (22) so that the first energy-consuming plate 21 buckles before the second energy-consuming plate 22, and ensures that when the first energy-consuming plate 21 buckles, the second energy-consuming plate 22 is in the elastic stage.

[0046] In the two sets of energy dissipation components 2 above and below the hinge 1, when the beam 100 swings relative to the column 200 around the axis of the hinge 1, one side is under tension and the other side is under compression. As the load increases further, the compression side enters the buckling energy dissipation stage, while the tension side continues to dissipate energy under tension; with the increase of the load, the tension side eventually enters the yielding energy dissipation stage. Through the combination of the buckling energy dissipation stage and the yielding energy dissipation stage, the beam-column joint achieves controllable initial stiffness while its bearing capacity is adjustable.

[0047] In this embodiment, since the first energy-dissipating plate 21 buckles before the second energy-dissipating plate 22, the second energy-dissipating plate 22 can provide good support when the swing intensity is between the first and second threshold values, thereby balancing the actual requirements of the node's load-bearing capacity and stiffness. By controlling the local buckling instability behavior of the beam-column node's energy-dissipating plate, the initial stiffness of the node remains unchanged while the load-bearing capacity is independently adjustable, effectively improving the node's energy dissipation capacity. This technical solution avoids the outward displacement of the plastic hinge at the end of the beam 100 and the collision between the column 200 and the beam 100, improving reliability.

[0048] Specifically, the node includes a hinge 1 and an energy-dissipating component 2. The hinge 1 provides a rotational connection around its axis between the beam 100 and the column 200, which is the structural basis for the node to adapt to deformation. The energy-dissipating component 2 is integrated into the hinge area. A first energy-dissipating plate 21 is arranged in the vertical plane, with its upper and lower ends fixedly connected to the beam 100 and the column 200, respectively. A second energy-dissipating plate 22 is arranged in the horizontal plane, with its two ends also fixedly connected to the beam 100 and the column 200, respectively. The first energy-dissipating plate 21 and the second energy-dissipating plate 22 are arranged orthogonally in space, jointly bearing and transmitting the interaction forces between the beam and the column.

[0049] When the structure is subjected to external forces such as earthquakes or strong winds, causing the beam 100 to oscillate relative to the column 200 around the axis of the hinge 1, and the intensity of the internal forces caused by the oscillation reaches a preset first threshold, the first energy dissipation plate 21 will be triggered to enter a buckling state. At this time, the first energy dissipation plate 21 begins to stably dissipate the energy input to the structure through buckling deformation, while the second energy dissipation plate 22 provides bending bearing capacity to maintain the overall stiffness of the joint. If the external forces are further enhanced, causing the oscillation intensity to reach a higher second threshold, the second energy dissipation plate 22 will subsequently enter a buckling state, beginning the second stage of energy dissipation. By precisely defining the geometric dimensions, material properties, and connection structure of the first and second energy dissipation plates 21 and 22, the specific values ​​of the first and second thresholds can be set independently, thereby achieving precise control over the yielding sequence of the joint and the energy dissipation capacity at each stage.

[0050] This technical solution achieves several key advantages. First, it decouples and coordinates the energy dissipation mechanism with the load-bearing function. Under normal use and minor earthquake conditions, the nodes rely on unbuckled energy-dissipating plates to provide the necessary stiffness and load-bearing capacity, maintaining structural integrity. Under moderate and major earthquakes, the two-stage energy-dissipating plates sequentially enter the buckling state, dissipating a large amount of energy in stages, significantly improving the energy dissipation efficiency of the nodes and the seismic toughness of the structure. Second, this technical solution effectively protects the main load-bearing components. By actively guiding inelastic deformation and energy dissipation to the specially designed energy-dissipating plates, the stability of other components is ensured, preventing failure of critical load-bearing parts such as the ends of beams or columns. It also prevents beam-column collisions caused by excessive deformation, significantly improving the reliability and safety of the nodes and the overall structure. Furthermore, the modular and adjustable node design perfectly meets the requirements of rapid assembly and clearly defined performance in modular steel structure substations. The clear functions of each component and controllable yield sequence facilitate standardized technical solutions, factory production, and efficient on-site installation, improving project quality and construction efficiency while ensuring structural safety.

[0051] Figure 1The diagram shows the implementation of energy-consuming nodes located on the left and right sides of column 200. In the actual assembly process, energy-consuming nodes can also be located on the front and rear sides of column 200 to achieve more comprehensive energy consumption between beam 100 and column 200.

[0052] Example 2:

[0053] Reference Figures 1-3 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0054] The energy dissipation component 2 also includes a constraint sleeve 23. The constraint sleeve 23 is fitted over the first energy dissipation plate 21. When the first energy dissipation plate 21 is in a non-buckled state, a predetermined distance exists between the inner wall of the constraint sleeve 23 and the extension surface of the first energy dissipation plate 21. When the first energy dissipation plate 21 buckles to abut against the inner wall of the constraint sleeve 23, it is limited. The constraint sleeve 23 constrains further buckling of the first energy dissipation plate 21, thereby allowing the first energy dissipation plate 21 to buckle at multiple locations to improve its energy dissipation capacity; and / or

[0055] A constraint sleeve 23 is provided over the second energy dissipation plate 22. When the second energy dissipation plate 22 is in a non-buckling state, there is a predetermined distance between the inner wall of the constraint sleeve 23 and the extension surface of the second energy dissipation plate 22. When the second energy dissipation plate 22 buckles to abut against the inner wall of the constraint sleeve 23, it is limited. The constraint sleeve 23 constrains the further buckling of the second energy dissipation plate 21, thereby enabling the second energy dissipation plate 21 to buckle and deform at multiple positions to improve its energy dissipation capacity.

[0056] In this embodiment, the constraint sleeve 23 can constrain the buckling behavior of the energy-dissipating plate to ensure that the buckling amount is within a certain range. This further avoids the outward displacement of the plastic hinge at the end of the beam 100 and the collision between the column 200 and the beam 100, thus improving reliability and balancing the actual requirements of the joint's load-bearing capacity and stiffness. By controlling the local buckling instability behavior of the energy-dissipating plate at the beam-column joint, the initial stiffness of the joint remains unchanged while the load-bearing capacity is independently adjustable, effectively improving the joint's energy dissipation capacity. This technical solution avoids the outward displacement of the plastic hinge at the end of the beam 100 and the collision between the column 200 and the beam 100, thus improving reliability.

[0057] Specifically, the constraint sleeves 23 are fitted onto the outside of the first energy-dissipating plate 21 or the second energy-dissipating plate 22 in a one-to-one correspondence. In the normal structural state or during the initial buckling stage of the energy-dissipating plate, a predetermined distance is maintained between the inner wall of the constraint sleeve 23 and the extension surface of the corresponding energy-dissipating plate. This ensures that the energy-dissipating plate can freely enter the initial buckling state after reaching the yield threshold and begin to stably dissipate energy. However, as the external forces continue to increase, and the buckling deformation of the energy-dissipating plate develops to a certain extent, its extension surface will contact and be abutted against the inner wall of the constraint sleeve 23, thereby generating a strong out-of-plane constraint effect. This effectively limits the further development of the buckling deformation of the energy-dissipating plate, preventing excessive buckling or even tearing failure, thus controlling the overall deformation of the node within a safe and recoverable range.

[0058] This technical solution achieves several key benefits. First, it enables multi-level coordination of energy dissipation, deformation control, and load-bearing capacity. The nodes utilize the stepped buckling of the energy-dissipating plates to ensure orderly energy dissipation, while the introduction of the constraint sleeve 23 regulates the final deformation at each stage. This ensures that while dissipating energy, the overall deformation of the node remains controllable, effectively preventing structural instability caused by excessive deformation in the node area. Second, this technical solution provides more thorough protection for the main load-bearing components. By guiding energy to the replaceable energy-dissipating plates and using the constraint sleeve 23 to prevent their failure, it not only ensures that the plastic hinge is strictly confined within the node's core area, preventing damage to critical load-bearing components such as the beam 100 or the column, but also avoids the collision risk caused by excessive relative rotation angles between beams and columns. This significantly improves structural safety under extreme loads and post-earthquake repairability.

[0059] Example 3:

[0060] Reference Figures 1-3 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0061] The constraint sleeve 23 forms two sets of transversely spaced contact portions 230. Each contact portion 230 includes two sets of vertically spaced protrusions 2301. The two sets of protrusions 2301 are respectively fixedly connected to two opposite inner walls of the constraint sleeve 23. The first energy dissipation plate 21 and the second energy dissipation plate 22 are located between the vertical spacing of the corresponding two sets of protrusions 2301, so that when the first energy dissipation plate 21 and the second energy dissipation plate 22 are in a non-buckling state, there is a predetermined distance between the inner wall of the constraint sleeve 23 and the extension surface of the corresponding first energy dissipation plate 21 and the second energy dissipation plate 22.

[0062] In this embodiment, two sets of contact portions 230 are formed inside the sleeve, arranged laterally at intervals. Each contact portion 230 includes two sets of protrusions 2301 arranged vertically at intervals, which are respectively fixed to two opposing inner walls of the constraint sleeve 23. The body of the energy dissipation plate is located in the space defined by the corresponding two sets of protrusions 2301, ensuring that when the energy dissipation plate does not buckle, a predetermined distance is maintained between the constraint sleeve 23 and the extension surface of the energy dissipation plate, providing sufficient space for the energy dissipation plate to buckle and deform normally, thereby efficiently dissipating energy.

[0063] Furthermore, the protrusion 2301 also acts as a "fulcrum" when the energy dissipation plate buckles, enabling the energy dissipation plate to reliably deform in the predetermined buckling direction with the protrusion 2301 as the boundary, thereby improving the reliability of the energy dissipation plate.

[0064] The opposing surfaces of the protrusions 2301 are all spherical to ensure the smoothness of contact between the energy dissipation board and the protrusions 2301 when the board buckles, and to avoid damage to the energy dissipation board caused by the stress generated by the contact between the protrusions 2301 and the energy dissipation board.

[0065] Specifically, each set of protrusions 2301 can be set as ball-head steel nails welded to the inner wall of the constraint sleeve 23, and each set of protrusions 2301 can be arranged in multiple rows at intervals, such as two rows, to disperse stress and improve the stability of the protrusions 2301 when in contact with the energy dissipation plate.

[0066] Example 4:

[0067] Reference Figures 1-9 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0068] Both the first energy-dissipating plate 21 and the second energy-dissipating plate 22 are integral structures, each divided into a central section 202 and outer sections 204 located at both ends of the central section 202. Two sets of contact portions 230 correspond to the positions where the central section 202 and the outer sections 204 connect. The length of the central section 202 is greater than the length of the outer sections 204. Thus, during buckling deformation of the energy-dissipating plate, because the central section 202 is longer, it is more prone to buckling deformation under the same conditions. Furthermore, the buckling deformation of the central section 202 is more controllable and stable compared to the buckling deformation of the outer section 204, thereby improving the reliability and stability of this node during energy dissipation.

[0069] Specifically, both the first energy-dissipating plate 21 and the second energy-dissipating plate 22 adopt a one-piece molded structure, but are conceptually divided into three regions in the design: a central section 202 and two outer sections 204 located at both ends. The lateral length of the central section 202 is greater than the length of the outer sections 204. Under the same stress conditions, the longer central section 202 has a lower buckling critical load due to its larger slenderness ratio, thus becoming the pre-defined main energy-dissipating section on the energy-dissipating plate that is prone to buckling deformation first.

[0070] The protrusion 2301 is located at the junction of the middle section 202 and the outer section 204 of the energy dissipation plate. In the initial state and during the early stages of buckling development, the protrusion 2301 maintains a precise predetermined distance from the surface of the energy dissipation plate, ensuring that the middle section 202 can fully and freely develop buckling deformation to dissipate energy. As the deformation increases, the energy dissipation plate first contacts the protrusion 2301 at the junction in the middle section 202 where buckling is most significant. This effectively suppresses further disordered development of the buckling wave, ensuring a highly stable energy dissipation process and controllable deformation mode.

[0071] Example 5:

[0072] Reference Figures 1-9 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0073] The state before buckling of the first energy dissipation plate 21 and the second energy dissipation plate 22 is the initial state, and the state during buckling includes the first state and the second state in sequence.

[0074] In the initial state, both the middle section 202 and the outer section 204 maintain flexural deformation toward the first side.

[0075] In the first state, the middle section 202 buckles and deforms to the first side, and the outer section 204 extends along the length direction of the first energy dissipation plate 21 or the second energy dissipation plate 22.

[0076] In the second state, the middle segment 202 buckles to the first side, and the outer segment 204 buckles to the second side.

[0077] The first side is one side that is opposite to one extension surface of the first energy-consuming plate 21 and the second energy-consuming plate 22, and the second side is one side that is opposite to the other extension surface of the first energy-consuming plate 21 and the second energy-consuming plate 22.

[0078] In this embodiment, during the initial stage of external load application, due to the inherent defects in the energy dissipation panel, its overall deformation under the constraint of the protrusions 2301 on both sides is as follows: Figure 4 As shown, the deformation at the contact point between protrusion 2301 and the energy dissipation plate is as follows: Figure 5 As shown, the contact pressure is relatively low.

[0079] As the energy-dissipating plate continues to be compressed, lateral buckling deformation develops. The middle section 202 energy-dissipating plate deflects upward, increasing the contact area with the protrusion 2301. The outer section 204 energy-dissipating plate deflects downward, decreasing the contact area with the protrusion 2301. The overall contact area increases, and the overall deformation is as follows: Figure 6 As shown, the deformation at the contact point between protrusion 2301 and the energy dissipation plate is as follows: Figure 7 As shown, the contact pressure is relatively high, which is the first state.

[0080] When the axial pressure exceeds the critical buckling load of the energy dissipation plate, the contact area between the energy dissipation plate and protrusion 2301 is large, resulting in high friction and a continued increase in load. This continues until the cross-section at the contact point between the energy dissipation plate and protrusion 2301 deflects, reducing the contact area. Consequently, the load-bearing capacity of the energy dissipation plate rapidly degrades, and the overall deformation becomes as follows: Figure 8 As shown, the deformation at the contact point between protrusion 2301 and the energy dissipation plate is as follows: Figure 9 As shown, the contact pressure is relatively low, which is the second state.

[0081] Therefore, the peak compressive load of the energy dissipation plate under the constraint of protrusion 2301 is controlled by the deflection of the energy dissipation plate section at the contact point between the energy dissipation plate and protrusion 2301. Before the section deflection, the friction between protrusion 2301 and the surface of the energy dissipation plate is large, and the load-bearing capacity is increased. After the section deflection, the contact area is reduced, the friction is smaller, and the load-bearing capacity is degraded.

[0082] During the transition from the initial state to the first state, the middle section 202 is the first to undergo significant buckling deformation towards the first side, becoming the main source of energy dissipation. At the same time, the outer sections 204 at both ends exhibit a behavior of extending along the length of the plate. While continuing to reliably transmit internal forces, the stiffness characteristics of the outer sections 204 complement and synergize with the buckling of the middle section 202, resulting in a more gradual decrease in the overall stiffness of the node and avoiding abrupt changes in performance.

[0083] As the load increases further to a higher level, the deformation evolves to the second state. During this process, not only does the middle section 202 continue to develop its buckling deformation, but the outer sections 204 at both ends also begin to participate in the reverse buckling, i.e., towards the second side. The relative relationship between the first and second sides allows the buckling deformation wave to spread uniformly and stably throughout the entire energy-dissipating plate, thereby greatly improving the plastic rotation capacity of the node and the total energy dissipation capacity.

[0084] Furthermore, in the first state, the energy dissipation component 2 stretched on the other side can be in an elastic deformation state to avoid the energy dissipation component 2 yielding under a small swing load, thereby helping to reduce its maintenance costs.

[0085] Example 6:

[0086] Reference Figures 1-9In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0087] The constraint sleeve 23 includes:

[0088] Two sets of opposing and parallel limiting plates 231 and two sets of opposing and parallel connecting plates 232 are provided. The ends of the limiting plates 231 and the connecting plates 232 are alternately fixedly connected to form a rectangular frame structure, which can be sleeved on the first energy-consuming plate 21 and / or the second energy-consuming plate 22. The contact part 230 is fixedly connected to the limiting plate 231.

[0089] The constraint sleeve 23 may also include mounting bolts. When assembling the constraint sleeve 23 and the energy-dissipating plate, the mounting bolts pass through one connecting plate 232, the energy-dissipating plate, and another connecting plate 232 in sequence and are then tightened. The mounting bolts are arranged in pairs, spaced apart along the length of the connecting plate 232. After the mounting bolts are tightened, the contact portion 230 can naturally abut against the energy-dissipating plate to allow for the required predetermined spacing, and also facilitates welding operations on the connecting plate 232.

[0090] In this embodiment, the rectangular frame structure of the constraint sleeve 23 has a higher shape matching degree for the flat energy-consuming plate, and therefore can be stably fitted onto the outside of the energy-consuming plate. The protrusion 2301 is set and fixed on the inner sides of the two sets of limiting plates 231, making the division of labor among components with different functions clear: the connecting plate 232 ensures the integrity and rigidity of the sleeve frame, while the limiting plates 231 are specifically responsible for deformation constraint.

[0091] In other words, concentrating the contact portion 230 on the limiting plate 231 makes the control mechanism for the buckling deformation of the energy dissipation plate more focused and prominent, facilitating independent mechanical analysis and optimization during the design phase, and precise machining and quality inspection during the production phase. Secondly, the modular assembly method ensures manufacturing flexibility and tolerance.

[0092] Example 7:

[0093] Reference Figures 1-10 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0094] The beam-column joint also includes connecting bolts 3. One end of the energy-dissipating component 2 forms a vertically extending connecting flange, which is fixedly connected to the side wall of the column 200 by the connecting bolts 3, thereby achieving modular assembly of the beam-column joint and the column 200. The head of the connecting bolts 3 is located inside the column 200. The other end of the energy-dissipating component 2 also forms a vertically extending connecting flange, which can also be detachably connected to the beam 100 by bolts.

[0095] Multiple reinforcing plates 4 are horizontally extended and vertically spaced and fixedly connected inside the column 200, forming bolt channels between adjacent reinforcing plates 4.

[0096] Multiple partition plates 5 extend vertically and are fixedly connected to the reinforcing plate 4, and are all located within adjacent bolt channels.

[0097] The bolt channel corresponds to the lateral extension line of the connecting bolt 3. When the head of the connecting bolt 3 slides into the column 200, the partition plate 5 can abut against the head of the connecting bolt 3 before the connecting bolt 3 slides into the column 200.

[0098] This technical solution enhances the local stiffness and strength of the joint area of ​​column 200 by reinforcing plate 4, and effectively limits the maximum slippage of bolt heads by designing bolt channels and partition plates 5, preventing bolts from falling into the column 200 and improving the reliability of the assembly process.

[0099] Furthermore, the pre-embedded connecting bolts 3 inside the column 200 can be used on-site to connect with beam-column joints, enabling modular and rapid connection, solving the pain point that existing box columns are difficult to connect with bolts, and improving industrial production efficiency.

[0100] Example 8:

[0101] Reference Figures 1-10 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0102] The first energy-consuming plate 21 consists of two sets located on the front and rear sides of the second energy-consuming plate 22. This is to improve the balance of energy consumption of the energy-consuming component 2 and enhance the energy consumption effect of the node.

[0103] In this embodiment, the first energy-dissipating plate 21 is not a single piece, but is distributed in pairs on the front and rear sides of the second energy-dissipating plate 22. The energy-dissipating component 2, as a complete functional unit, is symmetrically distributed on the upper and lower sides of the hinge 1. From the perspective of the force mechanism, this symmetrical arrangement ensures that the node can maintain a high degree of balance between energy dissipation and deformation when subjected to bending moments from different directions or complex bidirectional seismic forces.

[0104] Example 9:

[0105] An embodiment of the present invention provides a substation comprising a steel structure, the steel structure including beams and columns. The beams and columns are connected using a modular steel structure buckling-resistant multi-stage energy-dissipating beam-column joint as described in the above-mentioned technical solution. A hinge 1 is hinged to the end of the beam 100 and the side wall of the column 200. An energy-dissipating component 2 is disposed on the vertical side of the hinge 1, and both ends of the first energy-dissipating plate 21 and the second energy-dissipating plate 22 are respectively fixedly connected to the end of the beam 100 and the side wall of the column 200. Therefore, this substation possesses all the beneficial effects of any of the above embodiments, which will not be detailed here.

[0106] It can be understood that, except for conflicting parts, the above embodiments 1-9 can be freely combined to form other embodiments of the present invention.

[0107] In the description of this invention, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0108] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium. They can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0109] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0110] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0111] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A modular steel structure buckling-resistance multi-stage energy-dissipating beam-column joint, suitable for connecting a beam (100) and a column (200), characterized in that, include: Hinged member (1), adapted to be hinged to the end of the beam (100) and the side wall of the column (200); An energy-dissipating component (2) is adapted to be disposed on the vertical side of the hinge (1) to rigidly connect the beam (100) and the column (200), the energy-dissipating component (2) including a first energy-dissipating plate (21) extending in the vertical plane and a second energy-dissipating plate (22) extending in the transverse plane. The first energy-consuming plate (21) and the second energy-consuming plate (22) are respectively fixedly connected to the end of the crossbeam (100) and the side wall of the column (200), and the slenderness ratio of the first energy-consuming plate (21) is greater than that of the second energy-consuming plate (22); When the swing intensity of the crossbeam (100) relative to the column (200) about the axis of the hinge (1) reaches a first threshold, the first energy-dissipating plate (21) buckles and the second energy-dissipating plate (22) is in the elastic stage; when the swing intensity of the crossbeam (100) relative to the column (200) about the axis of the hinge (1) reaches a second threshold, the second energy-dissipating plate (22) buckles, and the second threshold is greater than the first threshold.

2. The modular steel structure buckling-resistance multi-stage energy-dissipating beam-column joint as described in claim 1, characterized in that, The energy-consuming component (2) also includes a constraint sleeve (23); The constraint sleeve (23) is installed over the first energy dissipation plate (21). When the first energy dissipation plate (21) is in a non-buckling state, there is a predetermined distance between the inner wall of the constraint sleeve (23) and the extension surface of the first energy dissipation plate (21). When the first energy dissipation plate (21) buckles to abut against the inner wall of the constraint sleeve (23), it is limited. The constraint sleeve (23) constrains further buckling of the first energy dissipation plate (21) to improve its energy dissipation capacity; and / or The constraint sleeve (23) is installed over the second energy dissipation plate (22). When the second energy dissipation plate (22) is in a non-buckling state, there is a predetermined distance between the inner wall of the constraint sleeve (23) and the extension surface of the second energy dissipation plate (22). When the second energy dissipation plate (22) buckles to abut against the inner wall of the constraint sleeve (23), it is limited. The constraint sleeve (23) constrains the further buckling of the second energy dissipation plate (21) to improve its energy dissipation capacity.

3. The modular steel structure buckling-resistance multi-stage energy-dissipating beam-column joint as described in claim 2, characterized in that, The constraint sleeve (23) forms two sets of transversely spaced contact portions (230), each of which includes two sets of vertically spaced protrusions (2301). The two sets of protrusions (2301) are respectively fixedly connected to two opposing inner walls of the constraint sleeve (23). The first energy dissipation plate (21) and the second energy dissipation plate (22) are located between the vertical spacing of the corresponding two sets of protrusions (2301), so that when the first energy dissipation plate (21) and the second energy dissipation plate (22) are in a non-buckling state, there is a predetermined distance between the inner wall of the constraint sleeve (23) and the extension surface of the corresponding first energy dissipation plate (21) and the second energy dissipation plate (22).

4. The modular steel structure buckling-resistance multi-stage energy-dissipating beam-column joint as described in claim 3, characterized in that, The surfaces opposite to the protrusions (2301) are all spherical.

5. The modular steel structure buckling-resistance multi-stage energy-dissipating beam-column joint as described in claim 4, characterized in that, The first energy-consuming board (21) and the second energy-consuming board (22) are both integral structures, and are divided into a middle section (202) in the middle and an outer section (204) at both ends of the middle section (202). The two sets of contact parts (230) correspond to the positions where the middle section (202) and the outer section (204) are connected to each other. The length of the middle segment (202) is greater than the length of the outer segment (204).

6. The modular steel structure buckling-resistance multi-stage energy-dissipating beam-column joint as described in claim 5, characterized in that, The state before buckling of the first energy dissipation plate (21) and the second energy dissipation plate (22) is the initial state, and the state during buckling includes the first state and the second state in sequence; In the initial state, both the middle section (202) and the outer section (204) remain flexed towards the first side; In the first state, the middle section (202) buckles and deforms toward the first side, and the outer section (204) extends along the length direction of the first energy dissipation plate (21) or the second energy dissipation plate (22); In the second state, the middle segment (202) buckles toward the first side, and the outer segment (204) buckles toward the second side; The first side is one side that is opposite to one extension surface of the first energy-consuming plate (21) and the second energy-consuming plate (22), and the second side is one side that is opposite to the other extension surface of the first energy-consuming plate (21) and the second energy-consuming plate (22).

7. The modular steel structure buckling-resistance multi-stage energy-dissipating beam-column joint as described in claim 3, characterized in that, The constraint sleeve (23) includes: Two sets of opposing and parallel limiting plates (231) and two sets of opposing and parallel connecting plates (232) are provided. The ends of the limiting plates (231) and the connecting plates (232) are alternately fixedly connected to form a rectangular frame structure, which can be sleeved on the first energy-consuming plate (21) and / or the second energy-consuming plate (22). The contact part (230) is fixedly connected to the limiting plate (231).

8. The modular steel structure buckling-resistance multi-stage energy-dissipating beam-column joint as described in claim 1, characterized in that, The beam-column joint also includes: The connecting bolt (3) forms a vertically extending connecting flange at one end of the energy-consuming component (2), and the connecting flange is fixedly connected to the side wall of the column (200) by the connecting bolt (3) to realize the modular assembly of the beam-column node and the column (200); wherein, the head of the connecting bolt (3) is located inside the column (200); Multiple reinforcing plates (4) are horizontally extended and vertically spaced and fixedly connected inside the column (200), and bolt channels are formed between adjacent reinforcing plates (4); Multiple partition plates (5) are vertically extended and fixedly connected to the reinforcing plate (4), and are all located within the adjacent bolt channels; The bolt channel corresponds to the lateral extension line of the connecting bolt (3). When the head of the connecting bolt (3) slides into the column (200), the partition plate (5) can abut against the head of the connecting bolt (3) before the connecting bolt (3) slides into the column (200).

9. The modular steel structure buckling-resistance multi-stage energy-dissipating beam-column joint as described in any one of claims 1-8, characterized in that, The first energy-consuming plate (21) consists of two sets located on the front and rear sides of the second energy-consuming plate (22).

10. A substation, characterized in that: The steel structure includes the beam (100) and the column (200), and the beam (100) and the column (200) are connected by a modular steel structure buckling-resistant multi-stage energy-dissipating beam-column joint as described in any one of claims 1-9. The hinge (1) is hinged to the end of the beam (100) and the side wall of the column (200); the energy-consuming component (2) is disposed on the vertical side of the hinge (1), and the ends of the first energy-consuming plate (21) and the second energy-consuming plate (22) are respectively fixedly connected to the end of the beam (100) and the side wall of the column (200).

Images