Self-resetting assembled concrete beam-column energy-absorbing connection node and construction method

Abstract

The self-resetting assembled concrete beam-column energy-absorbing connection node and construction method belong to the field of structural engineering technology. The node includes a concrete column, an H-shaped steel, a concrete beam, a transition connector, a beam end plate, a cable unit, a damping energy-absorbing component, a flange connection cover plate, a friction energy-absorbing element, and a high-strength bolt and a web link plate. An H-shaped steel is embedded in the middle of the concrete column, and a beam end plate is embedded in the left end of the concrete beam. The transition connector is connected to the concrete beam through a cable unit, and the transition connector is connected to the embedded H-shaped steel through high-strength bolts. Friction energy-absorbing elements are provided at the connection position between the beam end plate and the transition connector flange and the web, and a damping energy-absorbing component is provided between the transition connector and the beam end plate. The components of the present invention are fully prefabricated, the pre-tightening force is tensioned in the factory, and only the corresponding bolts are installed on site, realizing industrialized production; it has the advantages of simple structure, high degree of industrialization, high prestressing precision, low labor cost, high energy consumption and recoverable function.

Description

Technical Field

[0001] The invention relates to a construction technology for a self-resetting assembled concrete beam-column energy-absorbing connection node, and belongs to the technical field of structural engineering. Background Art

[0002] In recent years, the construction industry has developed rapidly, promoting the transformation and upgrading of the energy and construction fields, and vigorously promoting prefabricated buildings to become the focus of construction transformation and upgrading. Prefabricated buildings have the advantages of high industrialization, low pollution, and short construction period. Prefabricated buildings continue to emerge, and the reliability and energy consumption capacity of prefabricated joints are the key to the safe application and service life of prefabricated buildings. The design of building structures requires "strong nodes and weak components". The irreversible plastic damage of beam-column joints directly affects the service life of the building, endangering people's lives and property.

[0003] In the current prefabricated concrete structure, precast beams and columns are equipped with reserved overhanging steel bars, and steel bars are overlapped at the intersection of beams and columns. They are connected by post-poured concrete. Wet pouring is required for construction, and the construction period is long. In addition, the post-poured joints are rigid, and plastic failure after earthquake will be severe, resulting in poor recoverable performance and energy consumption capacity. Summary of the invention

[0004] The purpose of the present invention is to provide a self-resetting assembled concrete beam-column energy-absorbing connection node and a construction method.

[0005] The present invention discloses a self-resetting assembled concrete beam-column energy-absorbing connection node and a construction method thereof. The self-resetting assembled concrete beam-column energy-absorbing connection node comprises a concrete column 1, an H-shaped steel 2, a concrete beam 3, a transition connector 4, a beam end plate 5, a cable unit 6, a damping energy-absorbing component 7, a flange connection cover plate 8, a friction energy-absorbing element 9, a first high-strength bolt 10, a second high-strength bolt 11, a third high-strength bolt 12 and a web connection plate 13. The middle part of the concrete column 1 is pre-embedded with an H-shaped steel 2, the left end of the concrete beam 3 is pre-embedded with a beam end plate 5, and the transition connector 4 is connected to the concrete column 1. The concrete beams are connected by a cable unit 6, and the two ends of the cable are anchored to the transition connector end plate 4-4 and the two ends of the concrete beam 3 through prestressed anchors respectively; the left connecting plate 4-1 of the transition connector 4 is connected to the web of the embedded H-shaped steel 2 through the first high-strength bolt 10, and the right web 4-3 is connected to the web of the beam end plate 5 through the web connecting plate 13 and the third high-strength bolt 12, and the transition connector 4 is connected to the beam end plate flange 5-2 through the flange connecting cover plate 8 and the second high-strength bolt 11; a damping energy-absorbing component 7 is arranged between the transition connector and the end plate.

[0006] The construction method of the self-resetting assembled concrete beam-column energy-absorbing connection node of the present invention comprises the following steps: step (1) making embedded components in a factory according to the design dimensions of a specific project, completing the embedding and prefabrication of corresponding components, and performing rust-proof treatment on each metal component; connecting the damping energy-absorbing component 7 at corresponding positions of the transition connector 4 and the beam end plate 5 by welding or hinged connection; temporarily fixing the friction energy-absorbing element 9 and the connection cover plate at the web and flange of the transition connector 4 and the beam end plate 5 by high-strength bolts;

[0007] Step (2) prestressing: passing the cable unit 6 through the concrete beam 3, the beam end plate 5, the damping energy dissipation component 7 and the transition connector end plate 4-4, and prestressing the cable unit 6 to the design value according to the specific engineering design requirements in the prefabrication factory through the prestressing tensioning machine, anchoring the cable unit 6 through the prestressing anchor, completing the prestressing, realizing the modular connection and prefabrication of the concrete beam 3 and the transition connector 4, and reinforcing the second high-strength bolt 11 and the third high-strength bolt 12;

[0008] Step (3) transport the combined module of the concrete beam 3 and the transition connector 4 and other components to the site, fix the precast concrete column, hoist the combined module of the concrete beam 3 and the transition connector 4 into place, and fix the left connecting plate 4-1 of the transition connector and the web of the pre-embedded H-shaped steel 2 of the concrete column with the first high-strength bolt 10. Step (4) calibrate and check the torque of each bolt to ensure the design value of the preload force of each bolt. After the installation is completed, perform overall anti-rust treatment on the node;

[0009] Step (5) To prevent the node connection position from deforming and collapsing due to rapid high temperature in a fire, the node position is fireproofed, and the fireproofing level is determined according to the actual project.

[0010] The benefits of the present invention are as follows: 1. All elements and components are prefabricated in the factory and industrialized, which avoids on-site wet operations, improves construction accuracy, shortens construction periods, and saves human resources; in order to avoid damage to the beam-column contact surface, the present invention adopts steel nodes at the node positions, and the nodes are arranged at the inflection points of the steel beams to move the plastic hinges outward, and the nodes are connected in sections by cable units. Under the action of earthquakes, the opening and closing of the joints can effectively avoid plastic deformation of the nodes; 2. The concrete beam 3 and the transition connector 4 are assembled together in the factory by the cable preload, and the prestressing accuracy is high to avoid high-altitude preload; 3. The transition connector 4 and the web and flange connection of the beam end plate 5 are arranged with friction energy dissipation devices to improve the energy dissipation of the node; 4. A damping energy dissipation component 7 is arranged between the transition connector and the beam end plate to further improve the energy dissipation capacity of this type of node; 5. If a friction energy dissipation component undergoes a large deformation, only the components 8, 9, and 13 need to be replaced, which is convenient for later maintenance and reinforcement, realizes recycling, and improves the service life. This type of node is easy to tighten bolts, and there is no wet work in on-site assembly. The components are fully prefabricated and fully assembled on-site. It has a high degree of industrialization and is suitable for the development and application of prefabrication. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a three-dimensional diagram of the present invention, Figure 2 It is the on-site installation diagram of the present invention, Figure 3 is a front view of the present invention, Figure 4 is a three-dimensional diagram of the transition connector of the present invention, Figure 5 is a three-dimensional diagram of the beam end plate of the present invention, Figure 6 It is a three-dimensional detailed drawing of the damping energy dissipation component of the present invention. DETAILED DESCRIPTION

[0012] The present invention discloses a self-resetting assembled concrete beam-column energy-absorbing connection node and a construction method thereof. The self-resetting assembled concrete beam-column energy-absorbing connection node comprises a concrete column 1, an H-shaped steel 2, a concrete beam 3, a transition connector 4, a beam end plate 5, a cable unit 6, a damping energy-absorbing component 7, a flange connection cover plate 8, a friction energy-absorbing element 9, a first high-strength bolt 10, a second high-strength bolt 11, a third high-strength bolt 12 and a web connection plate 13. The middle part of the concrete column 1 is pre-embedded with an H-shaped steel 2, the left end of the concrete beam 3 is pre-embedded with a beam end plate 5, and the transition connector 4 is connected to the concrete column 1. The concrete beams are connected by a cable unit 6, and the two ends of the cable are anchored to the transition connector end plate 4-4 and the two ends of the concrete beam 3 through prestressed anchors respectively; the left connecting plate 4-1 of the transition connector 4 is connected to the web of the embedded H-shaped steel 2 through the first high-strength bolt 10, and the right web 4-3 is connected to the web of the beam end plate 5 through the web connecting plate 13 and the third high-strength bolt 12, and the transition connector 4 is connected to the beam end plate flange 5-2 through the flange connecting cover plate 8 and the second high-strength bolt 11; a damping energy-absorbing component 7 is arranged between the transition connector and the end plate.

[0013] In the self-resetting assembled concrete beam-column energy-dissipating connection node described above, an H-shaped steel 2 is pre-embedded in the middle of the concrete column 1, and a high-strength bolt hole is opened on the web of the pre-embedded H-shaped steel for realizing dry connection with the transition connector 4 on site through the first high-strength bolt (10), thereby improving assembly efficiency and avoiding wet work.

[0014] In the self-resetting assembled concrete beam-column energy-absorbing connection node described above, the transition connector 4 includes a left connecting plate 4-1, a flange plate 4-2, a right web 4-3 and an end plate 4-4, and friction energy-absorbing elements 9 are provided on the outer side of the flange and on both sides of the web for friction energy absorption; the left connecting plate 4-1 of the transition connector is provided with a high-strength bolt hole, and the transition connector 4 and the embedded H-shaped steel 2 are fixed by the first high-strength bolt 10; corresponding holes are provided on both sides of the end plate 4-4 for fixing the cable unit 6; bolt holes are provided at corresponding positions of the right web 4-3 for fixing the web friction energy-absorbing element 9 and the web connecting plate 13; long bolt holes are provided on both sides of the flange plate 4-2 for limiting the position of the flange friction energy-absorbing element and the connecting cover plate when sliding and absorbing energy; a damping energy-absorbing component 7 is provided on the right side of the end plate 4-4, and the damping energy-absorbing component is connected to the corresponding position of the end plate by welding or hinged connection.

[0015] In the self-resetting assembled concrete beam-column energy-absorbing connection node described above, the beam end plate 5 includes an end plate 5-1, a flange 5-2, a web 5-3 and an embedded web 5-4. Friction energy-absorbing elements 9 are provided on the outer side of the flange and on both sides of the web for friction energy absorption; long bolt holes are provided at corresponding positions of the web 5-3 for limiting the position of the web friction energy-absorbing elements 9 and the connecting cover plate during sliding energy absorption; bolt holes are provided at corresponding positions of the flange for fixing the web friction energy-absorbing elements 9 and the web connecting plate 13; the embedded web 5-4 is embedded in the left end of the concrete beam to realize the consolidation prefabrication of the concrete beam; a damping energy-absorbing component 7 is provided on the left side of the end plate 5-1, and the damping energy-absorbing component is connected to the corresponding position of the end plate by welding or hinged connection.

[0016] The self-resetting assembled concrete beam-column energy-absorbing connection node described above, the damping energy-absorbing component 7 includes an outer sleeve 7-1, a hollow guide rod 7-2, a guide rod anchor plate 7-3, an elastic element 7-4, and a rubber material 7-5. The elastic element can be a disc spring, a spiral spring, a rubber spring or any combination thereof; the ends of the outer sleeve 7-1 and the hollow guide rod 7-2 are respectively connected to the right side of the transition connector end plate 4-4 and the left side of the end plate 5-1, and a through-type hollow is reserved inside, which is suitable for the cable unit to pass through its center; the outer sleeve is equipped with an elastic element 7-4 and a rubber material 7-5, the guide rod passes through the elastic element, and is fixed to the left side of the elastic element through the guide rod anchor plate 7-3. When the beam is subjected to force, the force is transmitted to the guide rod anchor plate 7-3 through the hollow guide rod 7-2, and the anchor plate compresses the elastic element 7-4 and the rubber material 7-5 to achieve energy dissipation.

[0017] In the self-resetting assembled concrete beam-column energy-absorbing connection node described above, the cable unit 6 is selected as an element with elastic restoring force, and the number is calculated and selected according to the specific engineering needs. One end of the cable unit is anchored to the left side of the transition connector end plate 4-4, and the other end is anchored to the right end of the concrete beam.

[0018] In the self-resetting assembled concrete beam-column energy-absorbing connection node described above, a pad is arranged at the end of the concrete beam 3 for anchoring the cable.

[0019] In the self-resetting assembled concrete beam-column energy-absorbing connection node described above, the flange connection cover plate 8 and the web connection plate 13 are provided with fixed bolt holes and sliding limit bolt holes at corresponding positions. The fixed bolt holes at corresponding positions are used to fix the flange connection cover plate 8, the web connection plate 13 and the friction energy-absorbing element 9, and the sliding bolts are used to limit the connection plate and the friction energy-absorbing element 9 during displacement deformation.

[0020] In the self-resetting assembled concrete beam-column energy-absorbing connection node described above, through holes are provided at corresponding positions of the concrete beam 3 for passing the cable unit 6 to provide pre-tightening force.

[0021] The construction method of the self-resetting assembled concrete beam-column energy-absorbing connection node of the present invention comprises the following steps: step (1) making embedded components in a factory according to the design dimensions of a specific project, completing the embedding and prefabrication of corresponding components, and performing rust-proof treatment on each metal component; connecting the damping energy-absorbing component 7 at corresponding positions of the transition connector 4 and the beam end plate 5 by welding or hinged connection; temporarily fixing the friction energy-absorbing element 9 and the connection cover plate at the web and flange of the transition connector 4 and the beam end plate 5 by high-strength bolts;

[0022] Step (2) prestressing: passing the cable unit 6 through the concrete beam 3, the beam end plate 5, the damping energy dissipation component 7 and the transition connector end plate 4-4, and prestressing the cable unit 6 to the design value according to the specific engineering design requirements in the prefabrication factory through the prestressing tensioning machine, anchoring the cable unit 6 through the prestressing anchor, completing the prestressing, realizing the modular connection and prefabrication of the concrete beam 3 and the transition connector 4, and reinforcing the second high-strength bolt 11 and the third high-strength bolt 12;

[0023] Step (3) transporting the combined module of the concrete beam 3 and the transition connector 4 and other components to the site, fixing the precast concrete column, hoisting the combined module of the concrete beam 3 and the transition connector 4 into place, and fixing the left connecting plate 4-1 of the transition connector and the web of the pre-embedded H-shaped steel 2 of the concrete column by the first high-strength bolt 10;

[0024] Step (4) calibrate and check the torque of each bolt to ensure the preload of each bolt is designed. After installation, the node is subjected to overall rust prevention treatment.

[0025] Step (5) To prevent the node connection position from deforming and collapsing due to rapid high temperature in a fire, the node position is fireproofed, and the fireproofing level is determined according to the actual project.

[0026] The concrete column 1 of the present invention is pre-embedded with an H-shaped steel 2 in the middle, and the web of the pre-embedded H-shaped steel is provided with high-strength bolt holes, which facilitates the subsequent dry assembly construction, improves the assembly efficiency, saves the assembly cost, and reduces the assembly difficulty.

[0027] The transition connector 4 of the present invention comprises a left connecting plate 4-1, a flange plate 4-2, a right web plate 4-3 and an end plate 4-4, wherein the outer side of the flange and both sides of the web are provided with friction energy dissipation elements 9 for friction energy dissipation; the left connecting plate 4-1 of the transition connector is provided with high-strength bolt holes for fixing the transition connector and the first high-strength bolt 10 of the embedded H-shaped steel web; corresponding holes are provided on both sides of the end plate for fixing the cable unit 6; bolt holes are provided at corresponding positions of the right web plate 4-2 for fixing the web friction energy dissipation element 9 and the web connecting plate 13; long bolt holes are provided on both sides of the flange for limiting the position of the flange friction energy dissipation element 9 and the connecting cover plate 8 during sliding energy dissipation; a damping energy dissipation component 7 is provided on the right side of the end plate, and the damping energy dissipation component is connected to the corresponding position of the end plate by welding or hinged connection. Dry operation facilitates construction, multi-component energy dissipation, and improves the stability and service life of the result.

[0028] The beam end plate 5 of the present invention includes an end plate 5-1, a flange 5-2, a web 5-3 and an embedded web 5-4. Friction energy dissipation elements 9 are provided on the outer side of the flange and on both sides of the web for friction energy dissipation. Long bolt holes are provided at corresponding positions of the web 5-3 for limiting the web friction energy dissipation elements 9 and the web connecting plates 13 during sliding energy dissipation. Bolt holes are provided at corresponding positions of the flange for fixing the web friction energy dissipation elements and the web connecting plates. The embedded web 5-4 is prefabricated at the left end of the concrete beam to realize the consolidation prefabrication of the concrete beam. A damping energy dissipation component 7 is provided on the left side of the beam end plate, and the damping energy dissipation component is connected to the corresponding position of the end plate by welding or hinged connection. The embedded components effectively reduce on-site wet operations and improve component accuracy. The long bolt holes provide sufficient displacement space for the nodes, reducing the plastic deformation of the nodes.

[0029] The damping energy-absorbing component 7 of the present invention comprises an outer sleeve 7-1, a hollow guide rod 7-2, a guide rod anchor plate 7-3, an elastic element 7-4, and a rubber material 7-5. The elastic element is selected from a disc spring, a spiral spring, a rubber spring, or any combination thereof; the ends of the outer sleeve 7-1 and the hollow guide rod 7-2 are respectively connected to the right side of the transition connector end plate 4-4 and the left side of the end plate 5-1, and a through-type hollow is reserved inside thereof, which is suitable for the cable unit to pass through its center; the outer sleeve is equipped with an elastic element 7-4 and a rubber material 7-5, the guide rod passes through the elastic element, and is fixed to the left side of the elastic element through the guide rod anchor plate 7-3. When the beam is subjected to force, the force is transmitted to the guide rod anchor plate 7-3 through the hollow guide rod 7-2, and the anchor plate compresses the elastic element 7-4 and the rubber material 7-5 to achieve energy dissipation. The damper superimposes the reaction force, which can provide better restoring force for the node while increasing energy dissipation.

[0030] The cable unit 6 of the present invention uses an element with elastic restoring force, and the number is calculated and selected according to the specific engineering needs. One end of the cable unit 6 is anchored to the left side of the end plate of the transition connector, and the other end is anchored to the end pad of the concrete beam. The factory tensioning prestressing force effectively avoids the dangerous operation of high-altitude tensioning prestressing, improves the accuracy of the prestressing force, and the prestressing force can provide restoring force for the node, realizing the role of the node's restorable function.

[0031] The end of the concrete beam 3 of the present invention is provided with a pad for anchoring the pad at the other end of the cable, so as to prevent the concrete from being crushed due to the pre-tightening force.

[0032] The flange connection cover plate 8 and the web connection plate 13 of the present invention are provided with fixing bolt holes and sliding limit bolt holes at corresponding positions. The fixing bolt holes at corresponding positions are used to fix the flange connection cover plate 8, the web connection plate 13 and the friction energy dissipation element 9, and the sliding bolts are used to limit the connection plate and the friction energy dissipation element during displacement deformation. This part of the component provides sufficient displacement space for the node, which can not only realize energy dissipation under the action of an earthquake, but also realize the function of resetting the initial function. If this part of the component undergoes plastic deformation, it can be repaired by simply replacing the connection plate, which reduces the cost of post-earthquake repair and extends the service life of the structure.

[0033] The specific implementation methods of the present invention are given below. It should be noted that the present invention is not limited to specific examples, and all equivalent changes made on the application technical basis are included in the protection scope of the present invention.

[0034] like Figure 1As shown, the self-resetting assembled concrete beam-column energy-absorbing connection node and construction method of the present invention include a concrete column 1, an H-shaped steel 2, a concrete beam 3, a transition connector 4, a beam end plate 5, a cable unit 6, a damping energy-absorbing component 7, a flange connection cover plate 8, a friction energy-absorbing element 9, a first high-strength bolt 10, a second high-strength bolt 11, a third high-strength bolt 12 and a web connection plate 13; the middle part of the concrete column 1 is pre-embedded with an H-shaped steel 2, the left end of the concrete beam 3 is pre-embedded with a beam end plate 5, and the transition connector 4 is connected to the concrete beam through a cable Unit 6 is connected, and both ends of the cable are anchored to the transition connector end plate 4-4 and the two ends of the concrete beam 3 through prestressed anchors respectively; the left connecting plate 4-1 of the transition connector 4 is connected to the web of the embedded H-shaped steel 2 through the first high-strength bolt 10, and the right web 4-3 is connected to the web of the beam end plate 5 through the web connecting plate 13 and the third high-strength bolt 12, and the transition connector 4 is connected to the beam end plate flange 5-2 through the flange connecting cover plate 8 and the second high-strength bolt 11; a damping energy-absorbing component 7 is arranged between the transition connector and the end plate.

[0035] Specifically, Figure 2 As shown, the concrete column 1 and the H-shaped steel 2, the concrete beam 3 and the beam end plate 5 are pre-buried and prefabricated in the factory. The concrete beam 3, the transition connector 4, the beam end plate 5, the cable unit 6, the damping energy dissipation component 7, the flange connection cover plate 8, the friction energy dissipation element 9, the first high-strength bolt 10, the second high-strength bolt 11, the third high-strength bolt 12 and the web connection plate 13 are prefabricated and assembled in the factory. This module is hoisted on site and the on-site assembly is achieved through the first high-strength bolt 10. The dry operation is convenient for construction, saving time and effort.

[0036] Specifically, Figure 4 As shown, the transition connector 4 includes a left connecting plate 4-1, a flange plate 4-2, a right web 4-3 and an end plate 4-4, and friction energy dissipation elements 9 are provided on the outer side of the flange and both sides of the web for friction energy dissipation; the transition connector is used as an assembly connection component to ensure that the component strength meets the bearing capacity requirements, which is a prerequisite for the realization of dry concrete operation.

[0037] Specifically, Figure 5 As shown, the beam end plate 5 includes an end plate 5-1, a flange 5-2, a web 5-3 and an embedded web 5-4. Friction energy dissipation elements 9 are provided on the outer side of the flange and both sides of the web for friction energy dissipation. The embedded beam end plate converts the concrete connection part into a steel node, which effectively avoids the problem of poor plastic deformation of concrete and improves the reliability and energy dissipation capacity of the node.

[0038] Specifically, Figure 6 As shown, the cable unit 6 uses an element with elastic restoring force, and the pre-tensioning force is tensioned in the factory, which effectively avoids the dangerous operation of high-altitude prestressing, improves the accuracy of the pre-tensioning force, and the pre-tensioning force can provide restoring force for the node, thereby realizing the role of the node's restorable function.

Claims

1. A self-resetting assembled concrete beam-column energy-absorbing connection node, comprising a concrete column (1), an H-shaped steel (2), a concrete beam (3), a transition connector (4), a beam end plate (5), a cable unit (6), a damping energy-absorbing component (7), a flange connection cover plate (8), a friction energy-absorbing element (9), a first high-strength bolt (10), a second high-strength bolt (11), a third high-strength bolt (12) and a web connection plate (13), characterized in that: An H-shaped steel (2) is embedded in the middle of the concrete column (1), a beam end plate (5) is embedded at the left end of the concrete beam (3), the transition connector (4) is connected to the concrete beam via a cable unit (6), and the two ends of the cable are anchored to the transition connector end plate (4-4) and the two ends of the concrete beam (3) via prestressed anchors; the left connecting plate (4-1) of the transition connector (4) is connected to the web of the embedded H-shaped steel (2) via a first high-strength bolt (10), the right web (4-3) is connected to the web of the beam end plate (5) via a web connecting plate (13) and a third high-strength bolt (12), and the transition connector (4) is connected to the beam end plate flange (5-2) via a flange connecting cover plate (8) and a second high-strength bolt (11); the transition connector A damping energy dissipation component (7) is arranged between the transition connector and the end plate; the transition connector (4) comprises a left connecting plate (4-1), a flange plate (4-2), a right web plate (4-3) and a transition connector end plate (4-4), and friction energy dissipation elements (9) are arranged on the outer side of the flange and both sides of the web plate for friction energy dissipation; the left connecting plate (4-1) of the transition connector is provided with a high-strength bolt hole, and the transition connector (4) and the embedded H-shaped steel (2) are fixed by a first high-strength bolt (10); corresponding holes are arranged on both sides of the transition connector end plate (4-4) for fixing the cable unit (6); bolt holes are arranged at corresponding positions of the right web plate (4-3) for fixing the web friction energy dissipation element (9) and the web connecting plate (13); the flange plate (4-2) Long bolt holes are provided on both sides for limiting the position of the flange friction energy dissipation element and the connecting cover plate when sliding and dissipating energy; a damping energy dissipation component (7) is arranged on the right side of the transition connector end plate (4-4), and the damping energy dissipation component is connected to the corresponding position of the end plate by welding or hinged connection; the beam end plate (5) comprises an end plate (5-1), a flange (5-2), a web (5-3) and an embedded web (5-4), and friction energy dissipation elements (9) are provided on the outer side of the flange and on both sides of the web for friction energy dissipation; long bolt holes are provided at corresponding positions of the web (5-3) for limiting the position of the web friction energy dissipation element (9) and the connecting cover plate when sliding and dissipating energy; bolt holes are provided at corresponding positions of the flange for fixing the web friction energy dissipation element (9) and the web connecting plate (13 ); the embedded web (5-4) is embedded in the left end of the concrete beam to realize the consolidation prefabrication of the concrete beam; a damping energy absorbing component (7) is arranged on the left side of the end plate (5-1), and the damping energy absorbing component is connected to the corresponding position of the end plate by welding or hinged connection; the damping energy absorbing component (7) includes an outer sleeve (7-1), a hollow guide rod (7-2), a guide rod anchor plate (7-3), an elastic element (7-4), and a rubber material (7-5), and the elastic element is selected from a disc spring, a spiral spring, a rubber spring or any combination thereof; the ends of the outer sleeve (7-1) and the hollow guide rod (7-2) are respectively connected to the right side of the transition connector end plate (4-4) and the left side of the end plate (5-1), and a through-type hollow is reserved inside, suitable for the cable unit to pass through its center;An elastic element (7-4) and a rubber material (7-5) are installed in the outer sleeve. The guide rod passes through the elastic element and is fixed to the left side of the elastic element through a guide rod anchor plate (7-3). When the beam is subjected to force, the force is transmitted to the guide rod anchor plate (7-3) through the hollow guide rod (7-2). The anchor plate compresses the elastic element (7-4) and the rubber material (7-5) to achieve energy dissipation.

2. The self-resetting assembled concrete beam-column energy-absorbing connection node according to claim 1 is characterized in that: An H-shaped steel (2) is pre-buried in the middle of the concrete column (1), and a high-strength bolt hole is opened in the web of the pre-buried H-shaped steel for achieving dry connection with a transition connector (4) on site through a first high-strength bolt (10).

3. The self-resetting assembled concrete beam-column energy-absorbing connection node according to claim 1 is characterized in that: The cable unit (6) is selected from elements with elastic restoring force, and the number is calculated and selected according to the specific engineering needs. One end of the cable unit is anchored to the left side of the transition connector end plate (4-4), and the other end is anchored to the right end of the concrete beam.

4. The self-resetting assembled concrete beam-column energy-absorbing connection node according to claim 1 is characterized in that: Pads are arranged at the ends of the concrete beams (3) for anchoring cables.

5. The self-resetting assembled concrete beam-column energy-absorbing connection node according to claim 1 is characterized in that: The flange connection cover plate (8) and the web connection plate (13) are provided with fixing bolt holes and sliding limiting bolt holes at corresponding positions. The fixing bolt holes at corresponding positions are used to fix the flange connection cover plate (8), the web connection plate (13) and the friction energy dissipation element (9), and the sliding bolts are used to limit the connection plate and the friction energy dissipation element (9) during displacement deformation.

6. The self-resetting assembled concrete beam-column energy-absorbing connection node according to claim 1 is characterized in that: Through holes are arranged at corresponding positions of the concrete beam (3) for passing the cable unit (6) to provide pre-tightening force.

7. The construction method of the self-resetting assembled concrete beam-column energy-absorbing connection node according to claim 1 is characterized in that: The steps are: Step (1) according to the design size of the specific project, the embedded components are manufactured in the factory, and the embedded and prefabricated corresponding components are completed, and each metal component is subjected to rust prevention treatment; the damping energy dissipation component (7) is connected to the corresponding positions of the transition connector (4) and the beam end plate (5) by welding or hinged connection; the friction energy dissipation element (9) and the connection cover plate are temporarily fixed at the web and flange of the transition connector (4) and the beam end plate (5) by high-strength bolts; Step (2) prestressing: passing the cable unit (6) through the concrete beam (3), the beam end plate (5), the damping energy dissipation component (7) and the transition connector end plate (4-4), and prestressing the cable unit (6) to the design value according to the specific engineering design requirements in the prefabrication factory through a prestressing tensioning machine, anchoring the cable unit (6) through a prestressed anchor, completing the prestressing, realizing the modular connection and prefabrication of the concrete beam (3) and the transition connector (4), and reinforcing the second high-strength bolt (11) and the third high-strength bolt (12); Step (3) transports the combined module of the concrete beam (3) and the transition connector (4) and other components to the site, fixes the precast concrete column, hoists the combined module of the concrete beam (3) and the transition connector (4) into place, and fixes the left connecting plate (4-1) of the transition connector and the web of the pre-embedded H-shaped steel (2) of the concrete column by means of the first high-strength bolt (10); Step (4) calibrate and check the torque of each bolt to ensure the preload of each bolt is designed. After installation, the node is subjected to overall rust prevention treatment. Step (5) To prevent the node connection position from deforming and collapsing due to rapid high temperature in a fire, the node position is fireproofed, and the fireproofing level is determined according to the actual project.

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