Replaceable beam-column joint with load-bearing and shock-absorbing synergic mechanism and method

Abstract

The application discloses a replaceable beam-column joint with a bearing-damping cooperative mechanism and a method, and solves the problem of poor seismic toughness of an underground structure joint in the prior art, and has the beneficial effects of improving the seismic toughness of the joint and ensuring the service life of the beam column of the underground structure, and the specific scheme is as follows: a replaceable beam-column joint with a bearing-damping cooperative mechanism, which comprises a first column, a first segment of a beam is fixed to the side of the first column, the first segment of the beam is connected with a second segment of the beam through a connecting piece, the first segment of the beam, the second segment of the beam and the connecting piece form part of a cross beam, the connecting piece is located on the opposite sides of the first segment of the beam and the second segment of the beam, a first fastener is arranged in sequence through the connecting piece on one side, the first segment of the beam or the second segment of the beam and the connecting piece on the other side, the first fastener is detachably arranged, an energy dissipation component is connected between the connecting pieces on the two sides, one end of the energy dissipation component is detachably connected with the first column, and the other end is detachably connected with the connecting piece.

Description

Technical Field

[0001] This invention relates to the field of beam-column joint connection technology, and in particular to a replaceable beam-column joint and method with a load-bearing and vibration-damping coordinated mechanism. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] In recent years, with the development and utilization of underground space, the form of underground structures has gradually shifted from small-span structures to large-scale underground frame structures. Underground structures are mostly cast-in-place concrete frame structures, resulting in a relatively simple form. Above-ground structures, on the other hand, offer a wider variety of forms, such as frame-shear wall structures, tube structures, and prefabricated concrete structures. Among these, prefabricated concrete structures offer advantages such as high construction efficiency, superior component quality, and resource conservation. Furthermore, the seismic performance indicators of prefabricated concrete structures are essentially consistent with those of cast-in-place concrete structures. With the advent of resilient cities, the seismic design philosophy for above-ground structures has shifted from "overcoming rigidity with rigidity" to "overcoming rigidity with flexibility," making structural seismic toughness a key research focus. Technologies for improving the seismic toughness of above-ground structures mainly include self-centering structures and replaceable beam-column joints.

[0004] Based on the aforementioned techniques for the seismic toughness of above-ground structures, this study investigates the seismic toughness of underground structures. The seismic design concept of self-resetting structures for above-ground structures is difficult to implement for underground structures. This is because the surrounding soil constrains the self-resetting space of underground structures. Unlike above-ground structures, damage to the main underground structure after an earthquake can cause surface subsidence, significantly impacting the surrounding environment. Furthermore, the repair of underground structures is challenging, time-consuming, and costly. For large underground frame structures, the forced action of the surrounding soil leads to significant inter-story deformation in the middle area of ​​the bottom-level columns and significant reverse bending deformation in the top-level columns. Under the soil-structure interaction, beams in the side spans also experience substantial deformation. Consequently, damage to large underground structures is primarily concentrated in the beam-column connection areas and the connection areas between the exterior walls and the roof slab. Repairing such damage is difficult, time-consuming, and costly.

[0005] The inventors discovered that existing technologies have proposed replaceable beam-column joint solutions for above-ground buildings, but their purpose is simply to achieve replaceability. The joints have poor toughness and do not improve the seismic resistance of the joints. They are mainly applicable to above-ground structures but not to underground structures, and cannot guarantee the lifespan of beams and columns. Moreover, replacing above-ground joints is relatively easy, but replacing underground joints is less efficient. Summary of the Invention

[0006] In view of the shortcomings of existing technologies, the purpose of this invention is to provide a replaceable beam-column joint with a load-bearing and vibration-damping synergistic mechanism. This invention aims to solve the problems of high difficulty in repairing large underground structures after damage, long repair construction period, high construction cost, and few methods to improve structural toughness. It avoids economic waste, extends the life cycle of beams and columns, and improves the efficiency of structural function recovery.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0008] A replaceable beam-column joint with a load-bearing and vibration-damping coordinated mechanism includes a first column, a first beam segment fixed to the side of the first column, the first beam segment and the first column being an integral structural component, the first beam segment and a second beam segment being connected by a connector, the first beam segment, the second beam segment and the connector forming part of a crossbeam, the connector being located on opposite sides of the first beam segment and the second beam segment, a first fastener being sequentially passed through the connector on one side, the first beam segment or the second beam segment and the connector on the other side, the first fastener being detachable, an energy-dissipating component being connected between the connectors on both sides, one end of the energy-dissipating component being detachably connected to the first column, and the other end being detachably connected to the connector, the energy-dissipating component being located on the upper and lower sides of the first beam segment;

[0009] The yield strength of the connector is less than or equal to 225 MPa and greater than or equal to 100 MPa, ensuring the connector's resistance to shear, tension, compression and bending. It can effectively deform during an earthquake to improve the seismic resistance at the joint. Moreover, connectors with low yield strength are more likely to be damaged during an earthquake, avoiding seismic damage to other components.

[0010] The replaceable beam-column joint of the load-bearing-shock-absorbing collaborative mechanism described above, wherein the first column, the first beam segment, and the second beam segment are all steel components, or the first column, the first beam segment, and the second beam segment are all reinforced concrete components.

[0011] As described above, in a replaceable beam-column joint with a load-bearing and vibration-damping coordinated mechanism, the connector is a first plate with a rectangular longitudinal section. The first plate has a set length, thickness, and height, and the height of the connector is greater than the height of the first beam segment.

[0012] The length of the connector is greater than the length of the first beam segment.

[0013] As described above, in a replaceable beam-column joint of a load-bearing and vibration-damping synergy mechanism, the portion of the connector extending beyond the first beam segment is connected to one end of the energy-dissipating component along the height direction of the first beam segment.

[0014] As described above, a replaceable beam-column joint with a load-bearing and vibration-damping synergy mechanism includes a second plate, an end plate at one end of the second plate, the end plate being perpendicularly connected to the second plate, the end plate and the second plate forming a T-shape, bolt holes being provided on both sides of the second plate on the end plate, and a second fastener passing through the bolt holes of the end plate and being connected to the first column to achieve a fastening connection between the energy-dissipating component and the first column.

[0015] The second plate has an end tube fixed at the other end away from the end plate, and the third fastener is arranged to pass through the top or bottom side of the connector on one side, the end tube and the connector on the other side in sequence.

[0016] As described above, in a replaceable beam-column joint with a load-bearing and vibration-damping synergy mechanism, two first openings are provided in the middle of the connector, the first fastener passes through the first openings, the central axes of the two first openings are located in the same plane, and the distance between the two first openings is 4 / 5-7 / 8 of the length of the connector.

[0017] As described above, in a replaceable beam-column joint with a load-bearing and vibration-damping collaborative mechanism, the connector has a second opening on both sides of the first opening at one location, and the third fastener passes through the second opening. The distance between the two second openings is 5 / 6-9 / 10 of the height of the connector.

[0018] The distance between the second opening and the adjacent first opening is less than the height of the first beam segment, thereby limiting the height of the connector and ensuring that the position of the energy-dissipating component is within a reasonable range to guarantee the energy-dissipating and vibration-damping effect of the replaceable beam-column joint.

[0019] As described above, in a replaceable beam-column joint with a load-bearing and vibration-damping coordinated mechanism, the length of the first beam segment is less than the length of the second beam segment.

[0020] The distance between the first beam segment and the second beam segment is set such that the distance between the first beam segment and the second beam segment is less than the length of the connector.

[0021] Secondly, the present invention also provides an application of a replaceable beam-column joint with a load-bearing and shock-absorbing synergistic mechanism, which can be applied to underground structures to effectively improve the seismic performance of underground structures and facilitate the replacement of joints in underground structures.

[0022] Thirdly, the present invention also provides an installation method for a replaceable beam-column joint with a load-bearing and vibration-damping coordinated mechanism, comprising the following:

[0023] The first column and the first beam section are connected as a single structure.

[0024] Energy-dissipating components are fixed on the upper and lower sides of the first beam, and one end of the energy-dissipating component is fixedly connected to the first column.

[0025] Connectors are installed on both sides of the first beam, and the first fastener passes through the connector on one side, the first beam, and the connector on the other side in sequence.

[0026] The second beam is placed between the two connectors, and another fastener connects the two connectors to the second beam.

[0027] The other end of the energy-consuming component is fixedly connected to the connectors on both sides.

[0028] The beneficial effects of the present invention are as follows:

[0029] 1) The structure of this invention is reasonable. The connector connects the first beam and the second beam. The replaceable beam-column node achieves deformation coordination between the energy-dissipating component and the connector through the rigid body movement of the first column, realizing the coordinated work of the column, the replaceable beam-column node and the crossbeam. The energy-dissipating component connects the connector to the first column, so that part of the force acting on the first column is transferred to the crossbeam. It plays an energy-dissipating role before and during the earthquake. The overall structure ensures the strength of the node under normal conditions.

[0030] The beams bear the axial force and shear force at the beam ends under the load of the overlying soil layer, while the energy-dissipating components do not bear the axial force and shear force at the beam ends under the load of the overlying soil layer, thus avoiding them being in a complex coupled stress state and giving full play to their energy dissipation and vibration reduction functions; the overall structure effectively avoids the constraint effect of the surrounding soil on the underground structure, and the detachable connection of each component effectively improves the seismic toughness of the structure in which it is located.

[0031] 2) The replaceable beam-column joint structure in this invention has a connector with a yield strength within a reasonable range. The connector has a low yield strength, which utilizes the shear, tensile, compressive, and bending resistance of the connector to jointly bear the load-bearing capacity, horizontal damping performance, and rotational damping performance of the joint. It fully utilizes the seismic ductility and energy dissipation capacity of the low yield strength connector. Moreover, in the event of an earthquake, the low yield strength connector can be damaged first, avoiding earthquake damage to other components. Compared with welded joints or cast-in-place beam-column joints, the material properties of each component in the structure of this invention are fully utilized, and the load-bearing capacity and energy dissipation and damping capacity of the original structure are improved, ensuring the lifespan of the beams and columns.

[0032] 3) In this invention, the connector is connected to the first beam segment and the second beam segment by the first fastener. The first fastener is detachable. The energy dissipation component is detachably connected to the first column and the connector. When the node structure or the second beam segment is damaged in an earthquake, it can be easily disassembled. Only the corresponding component needs to be replaced to quickly restore the structure to its original function. If the component is not damaged after the earthquake, it does not need to be replaced.

[0033] 4) The energy-consuming component structure is reasonably designed in this invention. The energy-consuming component is set on the upper and lower sides of the first beam. One end of the second plate in the energy-consuming component is provided with an end plate for detachable connection with the first column, and the other end is provided with an end tube to facilitate the detachable connection of the third fastener to the connector and the energy-consuming component.

[0034] 5) The connector structure in this invention is reasonably designed. The connector is set as the first plate, which facilitates the detachable connection between the connector and the first beam and the second beam. By setting the length and height of the connector and limiting the distance between the first opening and the second opening, the connector is conveniently connected to the energy dissipation component, and the seismic resistance of the connection between the connector, the first beam and the second beam is guaranteed.

[0035] 6) The overall structure in this invention is highly applicable to underground structures and allows for easy replacement of components underground. It can be placed in areas where underground structures are prone to severe damage, such as the beam-column joint connection in the side span area. The easy disassembly of this joint enhances the seismic toughness of the overall structure. Attached Figure Description

[0036] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0037] Figure 1 This is a schematic diagram of a replaceable beam-column joint according to one or more embodiments of the present invention, based on a load-bearing and vibration-damping coordinated mechanism. Figure 1 .

[0038] Figure 2 This is a schematic diagram of a replaceable beam-column joint according to one or more embodiments of the present invention, based on a load-bearing and vibration-damping coordinated mechanism. Figure 2 .

[0039] Figure 3 This is a schematic diagram of a replaceable beam-column joint in which the first column and the first beam segment are integrated in a load-bearing and vibration-damping coordinated mechanism according to one or more embodiments of the present invention.

[0040] Figure 4 This is a schematic diagram of the second beam segment in a replaceable beam-column joint according to one or more embodiments of the present invention, based on a load-bearing and vibration-damping coordinated mechanism.

[0041] Figure 5 This is a schematic diagram of the two-sided connectors in a replaceable beam-column joint of a load-bearing-damping synergistic mechanism according to one or more embodiments of the present invention.

[0042] Figure 6 This is a schematic diagram of an energy-dissipating component in a replaceable beam-column joint according to one or more embodiments of the present invention, based on a load-bearing and vibration-damping coordinated mechanism.

[0043] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0044] Wherein: 1. Connector; 2. First fastener; 3. Third fastener; 4. First beam segment; 5. Energy dissipation component; 6. Second fastener; 7. Second nut; 8. First column; 9. Second beam segment;

[0045] 1-1. First opening; 1-2. Second opening;

[0046] 5-1. End plate, 5-2. Second plate, 5-3. End tube. Detailed Implementation

[0047] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0048] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0049] As introduced in the background section, the existing technology has the problem of poor seismic toughness at underground structural nodes. In order to solve the above-mentioned technical problems, this invention proposes a replaceable beam-column node with a load-bearing and seismic damping synergy mechanism.

[0050] Example 1

[0051] In a typical embodiment of the present invention, reference is made to Figure 1 , Figure 2 As shown, a replaceable beam-column joint with a load-bearing and vibration-damping collaborative mechanism includes a first column 8, a first beam 4 fixed to the side of the first column 8, the first beam 4 and the first column 8 being an integral structural component, the first beam 4 and the second beam 9 being connected by a connector 1, the first beam 4, the second beam 9 and the connector 1 forming part of a crossbeam, the connector 1 being located on opposite sides of the first beam 4 and the second beam 9, a first fastener 2 being sequentially passed through the connector on one side, the first beam 4 or the second beam 9 and the connector on the other side, the first fastener 2 being detachable, an energy-dissipating component 5 being connected between the connectors on both sides, one end of the energy-dissipating component 5 being detachably connected to the first column 8 and the other end being detachably connected to the connector, the energy-dissipating component 5 being located on the upper and lower sides of the first beam 4;

[0052] The yield strength of the connector is less than or equal to 225 MPa and greater than or equal to 100 MPa. Using connectors with yield strength within this range can effectively ensure the shear, tensile, compressive and bending resistance of the connector. During an earthquake, it can effectively deform to improve the seismic resistance at the joint. Moreover, connectors with low yield strength will be damaged first during an earthquake, reducing the damage to other components.

[0053] In this embodiment, the first column 8, the first beam 4, and the second beam 9 are all reinforced concrete components. Thus, referring to... Figure 3 As shown, the first column and the first beam are an integral structure, ensuring the integrity of the first beam and the first column and enhancing the structural strength. When binding the steel cage of the first beam 4 and the first column 8, the steel cage of the first beam 4 and the steel cage of the first column 8 are bound together according to the position of the first beam 4. Finally, concrete is poured to form an integral structure. Moreover, holes are reserved before concrete pouring for the passage of the first fastener.

[0054] refer to Figure 4 As shown, the second beam 9 is a reinforced concrete beam with a set length. After the steel cage is tied, another hole for the first fastener to pass through needs to be reserved at the end of the beam before the concrete is poured. The other side of the second beam 9 can be directly connected to the second column (another vertical column), or the replaceable beam-column node structure in this embodiment can be set up and connected to the second column through another connector. The other connector, the second column, and the corresponding energy-consuming component form a replaceable beam-column node.

[0055] In other examples, the first column 8, the first beam segment 4, and the second beam segment 9 are all steel components;

[0056] Among them, reference Figure 5 As shown, connector 1 is the first plate, and the longitudinal section of the first plate is rectangular. The two first plates are located on the two sides of the first beam 4 and the second beam 9. The first plate has a set length, thickness and height. The height of connector 1 is greater than the height of the first beam 4. The length of connector 1 (the length direction of connector is consistent with the length direction of the beam) is greater than the length of the first beam 4, controlling the length of the first beam 4. The length of the first beam 4 is 1 / 15-1 / 10 of the total length of the beam. While ensuring the overall strength, it is conducive to the seismic performance of the replaceable beam-column joint. The length of connector is 10mm-50mm longer than the length of the first beam.

[0057] It is easy to understand that, along the height direction of the first beam 4, the portion of the connector 1 extending beyond the first beam is connected to one end of the energy-dissipating component 5, and the connector 1 is connected to the energy-dissipating component at the corner of its top or bottom side.

[0058] refer to Figure 6 As shown, the energy-dissipating component 5 includes a second plate 5-2. The width of the second plate is less than or equal to the thickness of the first beam segment. An end plate 5-1 is provided at one end of the second plate 5-2. The end plate 5-1 is perpendicularly connected to the second plate 5-2, and the end plate and the second plate form a T-shape. Bolt holes are provided on both sides of the second plate 5-2. The end plate is attached to the side of the first column 8. The second fastener 6 passes through the bolt holes of the end plate and is set with the first column to realize the fastening connection between the energy-dissipating component and the first column. The second fastener is specifically a second bolt. The second bolt passes through the first column 8 laterally. After the second bolt passes through the end plate and the first column 8, it is locked by the second nut 7.

[0059] The second plate 5-2 has an end tube 5-3 fixed at the other end away from the end plate. The end tube is hollow so that the third fastener can pass through. The third fastener 3 passes through the top or bottom side of the connector on one side, the end tube and the connector on the other side in sequence.

[0060] It should be noted that two first openings 1-1 are provided in the middle of the connector 1. The two first openings are symmetrically arranged about the center plane of the connector in the length direction. The first fastener 2 is arranged through the first opening 1-1. The central axes of the two first openings are located in the same plane. The distance between the two first openings 1-1 is 4 / 5-7 / 8 of the length of the connector. The position of the first openings is reasonably set to facilitate the reliability of the connection between the first fastener and the connector and the first beam and the second beam, and at the same time to facilitate the seismic toughness of the connector during earthquakes.

[0061] The connector 1 has two second openings 1-2 on both sides of one of the first openings 1-1. The inner diameter of the first opening is smaller than that of the first opening. The central axis of the second opening is located outside the central axis of the first opening. The two second openings are symmetrically arranged about the center plane of the connector in the width direction. The third fastener 3 is set through the second opening 1-2. The distance between the two second openings 1-2 is 5 / 6-9 / 10 of the height of the connector, which ensures the reliable connection between the connector and the energy-consuming component and helps to control the height of the connector.

[0062] In addition, the distance between the second opening 1-2 and the adjacent first opening 1-1 is less than the height of the first beam segment, thereby limiting the height of the connector and ensuring that the position of the energy-dissipating component is within a reasonable range to ensure the energy-dissipating and vibration-damping effect of the replaceable beam-column joint.

[0063] Understandably, the length of the first beam segment is less than the length of the second beam segment; the spacing between the first and second beam segments is set such that the distance between them is less than the length of the connector.

[0064] Specifically, the first fastener is the first bolt, which is an existing high-strength bolt. It passes through the first opening of the connector, the first beam or the second beam, and then through the first opening of the opposite side connector before being fastened by the first nut. The third fastener is specifically the third bolt, which passes through the second opening of the connector, the end tube, and the second opening of another connector before being locked by the third nut.

[0065] The structure provided in this embodiment has a reasonable overall layout. The connector connects the first beam segment and the second beam segment. The replaceable beam-column node achieves deformation coordination between the energy-dissipating component and the connector through the rigid body movement of the first column, realizing the coordinated work of the column, the replaceable beam-column node, and the crossbeam. The energy-dissipating component connects the connector to the first column, ensuring the strength of the overall structure under normal conditions. The crossbeam bears the axial force and shear force at the beam end under the load of the overlying soil layer, while the energy-dissipating component does not bear the axial force and shear force at the beam end under the load of the overlying soil layer, avoiding it from being in a complex coupled stress state and giving full play to its energy dissipation and vibration reduction function. The overall structure effectively avoids the constraint effect of the surrounding soil on the underground structure, which has important reference significance for improving the seismic toughness of underground structures.

[0066] Example 2

[0067] This embodiment provides an application of a replaceable beam-column joint with a load-bearing and vibration-damping synergy mechanism as described in Embodiment 1. Applied to underground structures, it can effectively improve the seismic performance of underground structures and facilitate the replacement of joints in underground structures.

[0068] Example 3

[0069] This embodiment provides an installation method for a replaceable beam-column joint with a load-bearing and vibration-damping coordinated mechanism as described in Embodiment 1, including the following:

[0070] The first column and the first beam section are connected as a single structure.

[0071] Energy-dissipating components are fixed on the upper and lower sides of the first beam, and one end of the energy-dissipating component is fixedly connected to the first column.

[0072] Connectors are installed on both sides of the first beam, and the first fastener passes through the connector on one side, the first beam, and the connector on the other side in sequence.

[0073] The second beam is placed between the two connectors, and another fastener connects the two connectors to the second beam.

[0074] The other end of the energy-consuming component is fixedly connected to the connectors on both sides.

[0075] The first column and the first beam are prefabricated as a whole, while the second beam and connectors are prefabricated in the factory and can be installed on site. During the prefabrication of the first beam and the second beam, corresponding holes for the first fastener to pass through are reserved respectively. The holes of the first beam are set close to the side of the first beam away from the first column, and the holes of the second beam are close to the side of the second beam facing the first beam.

[0076] The connection method between the energy-dissipating component 5 and the connector 1 is as follows: the energy-dissipating component 5 is located above and below the first beam section; the energy-dissipating component 5 is manufactured in the factory and connected by the third fastener 3 passing through the second opening of the connector 1 and the end tube of the energy-dissipating component.

[0077] Understandably, after the installation of the replaceable beam-column joint with the load-bearing-damping synergy mechanism, the second beam segment connects to other structures, and the first column connects to other structures. Under normal conditions, the replaceable beam-column joint, together with other structures, provides support. For underground structures, it also bears the load of the overburden layer. Before an earthquake, the joint has sufficient strength, stiffness, and energy dissipation capacity. Its load-bearing-damping synergy mechanism is as follows: First, the rigid motion of the first beam segment is used to coordinate the deformation of the energy dissipation component and the connector, achieving collaborative work. Second, the energy dissipation component does not bear the axial force and shear force at the beam end under the load of the overburden layer, avoiding it from being in a complex coupled stress state and fully utilizing its energy dissipation and damping function. Moreover, the shear, tensile, compressive, and bending resistance of the low-yield-strength connectors are used to synergistically bear the load-bearing performance, horizontal damping performance, and rotational damping performance of the joint, fully utilizing the seismic ductility and energy dissipation capacity of the connectors. After an earthquake, the structure can be quickly restored to its original function by replacing the connectors and energy dissipation components. This node can be applied to underground structures, ensuring not only the safety of the structure and the ability to quickly restore its functionality after an earthquake, but also saving on construction costs.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A replaceable beam-column joint with a load-bearing and vibration-damping coordinated mechanism, characterized in that, The structure includes a first column, a first beam segment fixed to the side of the first column, the first beam segment and the first column being an integral structural component, the first beam segment and the second beam segment being connected by a connector, the first beam segment, the second beam segment and the connector forming part of a crossbeam, the connector being located on opposite sides of the first beam segment and the second beam segment, a first fastener being sequentially passed through the connector on one side, the first beam segment or the second beam segment and the connector on the other side, the first fastener being detachable, an energy-dissipating component being connected between the connectors on both sides, one end of the energy-dissipating component being detachably connected to the first column, and the other end being detachably connected to the connector, the energy-dissipating component being located on the upper and lower sides of the first beam segment, along the height direction of the first beam segment, the portion of the connector segment extending beyond the first beam segment being connected to one end of the energy-dissipating component; The energy-consuming component includes a second plate, one end of which is provided with an end plate. The end plate is perpendicularly connected to the second plate, forming a T-shape. Bolt holes are provided on both sides of the second plate. A second fastener passes through the bolt holes of the end plate and is connected to the first column to achieve a fastening connection between the energy-consuming component and the first column. An end tube is fixed to the other end of the second plate away from the end plate. A third fastener is provided to pass through the top or bottom side of the connector on one side, the end tube, and the connector on the other side in sequence. The beam bears the axial force and shear force at the beam end under the load of the overlying soil layer, while the energy dissipation component does not bear the axial force and shear force at the beam end. The yield strength of the connector is less than or equal to 225 MPa and greater than or equal to 100 MPa, ensuring the connector's resistance to shear, tension, compression and bending. It can effectively deform during an earthquake to improve the seismic resistance at the joint. Moreover, the connector with low yield strength can be damaged first during an earthquake, avoiding seismic damage to other components. The replaceable beam-column joint achieves deformation coordination between the energy-dissipating component and the connector through the rigid body movement of the first column, so that part of the force acting on the first column is transferred to the beam. The replaceable beam-column joint is applied to underground structures and is arranged at the beam-column joint connection positions in the side span areas of the underground structure where serious damage is likely to occur.

2. The replaceable beam-column joint with a load-bearing and vibration-damping synergistic mechanism according to claim 1, characterized in that, The first column, the first beam segment, and the second beam segment are all steel components, or the first column, the first beam segment, and the second beam segment are all reinforced concrete components.

3. The replaceable beam-column joint with a load-bearing and vibration-damping synergistic mechanism according to claim 1, characterized in that, The connector is a first plate with a rectangular longitudinal section. The first plate has a set length, thickness and height, and the height of the connector is greater than the height of the first beam segment. The length of the connector is greater than the length of the first beam segment.

4. The replaceable beam-column joint with a load-bearing and vibration-damping synergistic mechanism according to claim 1, characterized in that, The connector has two first openings in the middle, through which the first fastener passes. The central axes of the two first openings are located on the same plane, and the distance between the two first openings is 4 / 5 to 7 / 8 of the length of the connector.

5. The replaceable beam-column joint with a load-bearing and vibration-damping synergistic mechanism according to claim 4, characterized in that, The connector has second openings on both sides of the first opening at one of its locations, and the third fastener passes through the second openings. The distance between the two second openings is 5 / 6 to 9 / 10 of the height of the connector. The distance between the second opening and the adjacent first opening is less than the height of the first beam segment.

6. The replaceable beam-column joint with a load-bearing and vibration-damping synergistic mechanism according to claim 1, characterized in that, The length of the first beam segment is less than the length of the second beam segment; The distance between the first beam segment and the second beam segment is set such that the distance between the first beam segment and the second beam segment is less than the length of the connector.

7. An installation method for a replaceable beam-column joint with a load-bearing and vibration-damping synergistic mechanism according to any one of claims 1-6, characterized in that, Includes the following: The first column and the first beam section are connected as a single structure. Energy-dissipating components are fixed on the upper and lower sides of the first beam, and one end of the energy-dissipating component is fixedly connected to the first column. Connectors are installed on both sides of the first beam, and the first fastener passes through the connector on one side, the first beam, and the connector on the other side in sequence. The second beam is placed between the two connectors, and the first fastener connects the two connectors to the second beam. The other end of the energy-consuming component is fixedly connected to the connectors on both sides.

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