An assembled self-resetting reinforced concrete beam-column connection node and a construction method thereof
By using plug-in connections and self-resetting connectors for precast concrete beam-column joints, the problems of residual deformation and insufficient seismic toughness in precast concrete structures after earthquakes have been solved, achieving efficient and low-cost seismic construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HAINAN UNIV
- Filing Date
- 2023-12-25
- Publication Date
- 2026-06-05
AI Technical Summary
The beam-column connection nodes of existing prefabricated concrete structures are prone to large residual deformation after earthquakes, have poor seismic toughness, and traditional construction methods are inefficient and costly, making it difficult to meet seismic requirements.
Precast concrete beams and columns are used, and the beam end embedded parts are connected to the beam column node embedded parts by plugging. Combined with self-resetting connectors and buffer pads, disc springs and tie rods are used to achieve efficient fixing without welding, thereby enhancing seismic toughness.
It reduces residual strain in the structure, improves seismic toughness and construction efficiency, reduces post-earthquake losses, and lowers construction costs.
Smart Images
Figure CN117721908B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of concrete beam-column connection technology in prefabricated building construction, specifically to a prefabricated self-resetting reinforced concrete beam-column connection node and construction method. Background Technology
[0002] With the development of the construction industry, the shortcomings of traditional cast-in-place concrete structures have gradually become apparent, leading to their replacement by prefabricated concrete structures. Compared to traditional cast-in-place concrete structures, prefabricated concrete structures offer higher construction efficiency, lower costs, and are more environmentally friendly, making them an important direction for development in my country's construction sector. Meanwhile, based on increasing demands for seismic performance in buildings, resilient structures, as a new type of shock-absorbing and recoverable functional structure, have become a research focus in engineering fields both domestically and internationally. Among these, self-resetting technology, as a primary means of improving seismic toughness, reduces residual strain and improves energy dissipation capacity by adding self-resetting devices and energy-dissipating devices to the structure, and has been gradually and widely adopted in the construction industry.
[0003] Nodes are the convergence points of various force flows and play a crucial role in improving the overall stability of the frame structure. Reinforced concrete frames equipped with traditional reinforced concrete beam-column connection nodes are prone to significant residual deformation after an earthquake, and are susceptible to node failure or column hinge damage, causing considerable inconvenience to post-earthquake repair work and significantly impacting critical buildings or lifeline projects. Therefore, to reduce post-earthquake losses, alleviate repair burdens, and improve the seismic toughness of reinforced concrete frame structures, it is essential to provide a prefabricated self-setting reinforced concrete beam-column connection node and its construction method that is convenient and efficient to construct, possesses good seismic toughness, strong self-resetting ability, and reliable seismic performance. This is a problem that urgently needs to be solved by those skilled in the art. The invention patent with application number 202311162481.1 discloses a prefabricated concrete beam-column self-resetting splicing node structure. The precast reinforced concrete beams are connected by elbow bolt assemblies passing through the connection node. The elbow bolt assembly includes a high-strength elastic elbow bolt arranged in the middle and a high-ductility energy-dissipating elbow bolt arranged on its periphery. It is easy to replace and has low construction cost. However, the connection between the beam and the column is only through elbow bolts, which has low strength and relatively poor seismic toughness. Summary of the Invention
[0004] The purpose of this invention is to provide a prefabricated self-resetting reinforced concrete beam-column connection node and construction method. This node can effectively reduce the residual strain of the structure, increase the seismic toughness of the structure, reduce the post-earthquake loss of the building structure, and has a simple and compact structure with high connection strength. This method does not require welding on the construction site, thus improving construction efficiency.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A prefabricated self-resetting reinforced concrete beam-column connection node includes a precast concrete column and precast concrete beams installed on both sides of the precast concrete column. The precast concrete column consists of multiple longitudinal reinforcement bars, several column stirrups spaced vertically along the longitudinal reinforcement bars, and column concrete poured on the longitudinal reinforcement bars and column stirrups. The precast concrete beam consists of upper beam longitudinal reinforcement bars, lower beam longitudinal reinforcement bars, several beam stirrups spaced along the length of the upper beam longitudinal reinforcement bars, and beam concrete poured on the upper beam longitudinal reinforcement bars, lower beam longitudinal reinforcement bars, and beam stirrups. A beam-column node embedded part is provided on the precast concrete column at the connection position. The beam-column node embedded part horizontally penetrates the precast concrete column, and both ends of the beam-column node embedded part extend to the outer side of the end of the precast concrete column. A beam end embedded part is provided at the end of the precast concrete beam. The beam end embedded part includes an anchoring steel plate, a connecting steel sleeve fixedly installed on one side of the anchoring steel plate, and a threaded sleeve fixedly installed on the anchoring steel plate. An opening is provided on the anchoring steel plate at the position corresponding to the connecting steel sleeve. The anchoring steel plate is set on the end of the precast concrete beam, and the connecting steel sleeve is located inside the precast concrete beam. One end of the upper beam longitudinal reinforcement and the lower beam longitudinal reinforcement are both installed on the threaded sleeve. One end of the beam-column node embedded part passes through the opening and is located in the inner cavity of the connecting steel sleeve. Self-resetting connectors are fixedly installed on the upper and lower sides of the precast concrete beam. The self-resetting connectors include a vertically fixed end plate and a bottom plate. The bottom plates of the two self-resetting connectors located on the upper and lower sides of the precast concrete beam are fixedly connected to the precast concrete beam through vertical tie rods. The end plates of the two self-resetting connectors located on the left and right sides of the precast concrete column are fixedly connected to the precast concrete column through horizontal tie rods. A disc spring is sleeved on the horizontal tie rod, and the disc spring is located between the locking nut and the self-resetting connector. A buffer pad is provided between the precast concrete beam and the precast concrete column.
[0007] Preferably, the self-resetting connector further includes a stiffening plate disposed between the end plate and the bottom plate, a transverse through hole provided on the end plate, through which the transverse tie rod passes; and a vertical through hole provided on the bottom plate, through which the vertical tie rod passes.
[0008] Preferably, two stiffening plates are provided at intervals, and both the transverse through hole and the vertical through hole are located on the outer side of the stiffening plate.
[0009] Preferably, two transverse through holes are provided on each side of the end plate and on each side of the stiffening plate; and three vertical through holes are provided on each side of the bottom plate and on each side of the stiffening plate.
[0010] Preferably, the thickness of the buffer pad layer is not less than 15 mm.
[0011] Preferably, the beam-column node embedded part consists of an embedded steel plate adapted to the inner cavity of the connecting steel sleeve and a number of studs fixedly disposed on both sides of the middle part of the embedded steel plate.
[0012] Preferably, multiple studs are also fixedly installed on the outside of the connecting steel sleeve.
[0013] A construction method for a prefabricated self-resetting reinforced concrete beam-column connection joint, the construction method comprising the following steps:
[0014] Step 1: Fabrication of precast components. For the fabrication of embedded parts at the beam ends, firstly, threaded sleeves are welded and fixed onto the anchoring steel plate at the installation positions corresponding to the upper and lower longitudinal reinforcement bars of the beam. Then, multiple steel plates are welded and spliced to form a connecting steel sleeve with a rectangular cavity. The connecting steel sleeve is then welded and fixed onto the anchoring steel plate. Finally, studs are welded onto the surface of the connecting steel sleeve. For the fabrication of embedded parts at beam-column joints, embedded steel plates of appropriate sizes are cut and fabricated. Then, multiple studs are welded and fixed onto both sides of the middle of the embedded steel plate. A self-resetting connector is formed by welding and fixing the connecting end plate, bottom plate, and stiffening plate.
[0015] Step two involves the fabrication of precast concrete columns and beams. The precast beam end embedded parts and multiple vertical tie rods are installed on the beam reinforcement frame, which consists of upper beam longitudinal reinforcement, lower beam longitudinal reinforcement, and beam stirrups. Threads are installed on the ends of the upper and lower beam longitudinal reinforcements, and then the threaded ends are connected to threaded sleeves. The installation positions of the multiple vertical tie rods should correspond to the positions of the vertical through holes on the self-resetting connectors. Finally, formwork is erected and concrete is poured to form the precast concrete beam. The column longitudinal reinforcement and column stirrups are tied to form the column reinforcement frame. The precast beam-column joint embedded parts are then installed at the beam-column connection positions. Finally, formwork is erected and concrete is poured to form the precast concrete column.
[0016] Step 3: Install the self-resetting connectors. Install the self-resetting connectors on the surface of the precast concrete beam. The vertical tie rods pass through the vertical through holes. Use nuts to fix the two self-resetting connectors on the upper and lower surfaces of the precast concrete beam.
[0017] Step four: Beam-column connection. Hoist the precast concrete beam and install the end of the beam-column node embedded part into the beam end embedded part. Then, install a buffer pad layer on the connection surface between the precast concrete beam and the precast concrete column. Use transverse tie rods to pass through the transverse through holes on the two self-resetting connectors on the left and right sides of the precast concrete column. Put the disc spring on the transverse tie rod and then use nuts to tighten the connection to achieve a fixed connection between the precast concrete column and the two precast concrete beams.
[0018] In this invention, when the precast concrete beam is installed on the precast concrete column, a buffer layer and disc spring allow for a certain amount of displacement space after the connection between the precast concrete beam and the precast concrete column. This effectively reduces residual strain in the structure, increases its seismic toughness, and reduces post-earthquake losses. The entire connection process between the precast concrete beam and the precast concrete column eliminates the need for welding, improving construction efficiency and avoiding the problems of aerial welding, thus reducing construction costs. The precast beam end embedded parts, beam-column joint embedded parts, and self-resetting connectors are simple in structure and low in cost, effectively reducing the manufacturing cost of the joints. This construction method eliminates the need for on-site welding; the connection is simple and convenient through the insertion of the beam end embedded parts and the beam-column joint embedded parts, facilitating positioning and improving construction efficiency. The use of screw-fixed connections further enhances ease of operation. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0020] Figure 2 This is a schematic diagram of the AA cross-sectional structure of the present invention;
[0021] Figure 3 This is a schematic diagram of the precast reinforced concrete column of the present invention;
[0022] Figure 4 This is a front view schematic diagram of the self-resetting connector of the present invention;
[0023] Figure 5 This is a top view of the self-resetting connector of the present invention;
[0024] Figure 6 This is a left-side schematic diagram of the self-resetting connector of the present invention;
[0025] Figure 7 This is a right-side schematic diagram of the self-resetting connector of the present invention;
[0026] Figure 8 This is a front view schematic diagram of the beam end embedded part of the present invention;
[0027] Figure 9 This is a top view of the pre-embedded part at the beam end of the present invention;
[0028] Figure 10 This is a left-side schematic diagram of the beam-end embedded part of the present invention;
[0029] Figure 11 This is a right-side schematic diagram of the beam-end embedded part of the present invention;
[0030] Figure 12 This is a front view schematic diagram of the embedded parts for beam-column joints of the present invention;
[0031] Figure 13This is a top view schematic diagram of the embedded parts for beam-column joints of the present invention;
[0032] Figure 14 This is a side view schematic diagram of the embedded part of the beam-column joint of the present invention;
[0033] In the diagram: 1. Precast concrete column; 2. Precast concrete beam; 3. Beam-column joint embedded part; 4. Beam end embedded part; 5. Self-resetting connector; 6. Vertical tie rod; 7. Horizontal tie rod; 8. Disc spring; 9. Buffer pad; 10. Column longitudinal reinforcement; 11. Column stirrup; 12. Column concrete; 20. Upper beam longitudinal reinforcement; 21. Lower beam longitudinal reinforcement; 22. Beam stirrup; 23. Beam concrete; 30. Embedded steel plate; 31. Stud; 40. Anchoring steel plate; 41. Connecting steel sleeve; 42. Threaded sleeve; 50. End plate; 51. Base plate; 52. Stiffening plate; 53. Horizontal through hole; 54. Vertical through hole. Detailed Implementation
[0034] The present invention will be further described below with reference to the accompanying drawings:
[0035] like Figures 1 to 14 The prefabricated self-resetting reinforced concrete beam-column connection node shown includes a precast concrete column 1 and precast concrete beams 2 fixedly and symmetrically installed on both sides of the precast concrete column 1. The precast concrete column 1 is composed of multiple column longitudinal bars 10, several column stirrups 11 arranged vertically along the column longitudinal bars 10, and column concrete 12 poured on the column longitudinal bars 10 and column stirrups 11. The column longitudinal bars 10 and column stirrups 11 are connected by binding. A beam-column node embedded part 3 is provided on the precast concrete column 1 at the connection position with the precast concrete beam 2. The beam-column node embedded part 3 horizontally penetrates the precast concrete column 1, and both ends of the beam-column node embedded part 3 extend to the outer side of the end of the precast concrete column 1 for connection with the precast concrete beam 2. In one embodiment, the beam-column joint embedded part 3 consists of an embedded steel plate 30 adapted to the inner cavity of the connecting steel sleeve 41 and a number of studs 31 fixedly disposed on both sides of the middle part of the embedded steel plate 30 by welding. The studs 31 are located inside the column concrete 12, which improves the connection strength of the embedded steel plate 30 on the precast concrete column 1.
[0036] The precast concrete beam 2 consists of upper beam longitudinal reinforcement 20, lower beam longitudinal reinforcement 21, a number of beam stirrups 22 spaced along the length of the upper beam longitudinal reinforcement 20 or the lower beam longitudinal reinforcement 21, and beam concrete 23 poured on the upper beam longitudinal reinforcement 20, the lower beam longitudinal reinforcement 21 and the beam stirrups 22. The beam stirrups 22 are tied and fixedly installed on the upper beam longitudinal reinforcement 20 and the lower beam longitudinal reinforcement 21.
[0037] An embedded beam end component 4 is pre-installed at the end of the precast concrete beam 2. The embedded beam end component 4 includes an anchoring steel plate 40, a connecting steel sleeve 41 fixedly installed on one side of the anchoring steel plate 40 by welding, and a threaded sleeve 42 fixedly installed on the anchoring steel plate 40 by welding. An opening is provided on the anchoring steel plate 10 at the position corresponding to the internal cavity of the connecting steel sleeve 41. The anchoring steel plate 40 is located at the end of the precast concrete beam 2, and the outer surface of the anchoring steel plate 40 is flush with the end face of the precast concrete beam 2. The connecting steel sleeve 41 is located inside the precast concrete beam 1. One end of the upper beam longitudinal reinforcement 20 and the lower beam longitudinal reinforcement 21 are respectively installed on a threaded sleeve 42. One end of the beam-column node embedded component 3 is inserted into the inner cavity of the connecting steel sleeve 41 through the opening. In one embodiment, multiple studs 31 are also fixedly installed on the outside of the connecting steel sleeve 41 by welding. The connecting steel sleeve 41 is cast into the beam concrete 23, and the studs 31 improve its connection strength on the precast concrete beam 2.
[0038] Self-resetting connectors 5 are fixedly installed on the upper and lower sides of the precast concrete beam 2. In one embodiment, the self-resetting connector 5 includes an end plate 50 and a bottom plate 51 fixedly installed vertically by welding, and a stiffening plate 52 fixedly installed between the end plate 50 and the bottom plate 51 by welding. A transverse through hole 53 is provided on the end plate 50, through which the two ends of the transverse tie rod 7 pass. A vertical through hole 54 is provided on the bottom plate 51, through which the two ends of the vertical tie rod 6 pass. In a preferred embodiment, two stiffening plates 52 are provided at intervals, and the transverse through holes 53 and vertical through holes 54 are both located on the outer side of the stiffening plates 52. In this embodiment, two transverse through holes 53 are provided on each side of the end plate 50 and on each side of the bottom plate 51 and on each side of the stiffening plate 52.
[0039] Two self-resetting connectors 5 located on the upper and lower sides of the precast concrete beam 2 are fixedly connected by vertical tie rods 6; two self-resetting connectors 5 located on the left and right sides of the precast concrete column 1 are fixedly connected by horizontal tie rods 7. A disc spring 8 is sleeved on the end of the horizontal tie rod 7, and the disc spring 8 is located between the locking nut and the self-resetting connector 5. The locking nut is used to press the disc spring 8 onto the end face of the end plate 50. A buffer pad 9 is provided on the connection surface between the precast concrete beam 2 and the precast concrete column 1. The thickness of the buffer pad 9 is not less than 15mm. In this embodiment, the buffer pad 9 is made of a flexible buffer material, which can be aluminum foam, rubber, or vibration isolation material.
[0040] like Figures 1 to 14 The method for constructing a prefabricated self-resetting reinforced concrete beam-column connection node includes the following steps:
[0041] Step 1: Fabrication of precast components. For the fabrication of the beam end embedded part 4, firstly, four threaded sleeves 42 are welded and fixed to the anchoring steel plate 40 at the installation positions corresponding to the upper beam longitudinal reinforcement 20 and the lower beam longitudinal reinforcement 21. Then, multiple steel plates are welded and spliced to form a connecting steel sleeve 41 with a rectangular cavity. The connecting steel sleeve 41 is then welded and fixed to the designated position on the anchoring steel plate 40. Finally, several studs 31 are welded to the surface of the connecting steel sleeve 41. For the fabrication of the beam-column node embedded part 3, a suitable size embedded steel plate 30 is cut and fabricated. Then, multiple studs 31 are welded and fixed to both sides of the middle of the embedded steel plate 30. For the fabrication of the self-resetting connector 5, the connecting end plate 50, the bottom plate 51, and the stiffening plate 52 are fixedly connected by welding to form the self-resetting connector 5.
[0042] Step two involves the fabrication of precast concrete columns 1 and precast concrete beams 2. The precast beam end embedded parts 4 and multiple vertical tie rods 6 are fixedly installed at the designed positions on the beam reinforcement frame consisting of upper beam longitudinal reinforcement 20, lower beam longitudinal reinforcement 21, and beam stirrups 22. Threads are applied to the ends of the upper beam longitudinal reinforcement 20 and lower beam longitudinal reinforcement 21 to create threaded connections. The threaded ends of the upper beam longitudinal reinforcement 20 and lower beam longitudinal reinforcement 21 are then connected to threaded sleeves 42. The multiple vertical tie rods 6 should be installed at the corresponding vertical through holes 54 on the self-resetting connectors 5. Finally, formwork is erected and concrete is poured to form the precast concrete beam 2. The column longitudinal reinforcement 10 and column stirrups 11 are tied to form the column reinforcement frame. The precast beam-column node embedded parts 3 are then installed at the beam-column connection positions. The beam-column node embedded parts 3 are adjusted to suitable positions. Finally, formwork is erected and concrete is poured to form the precast concrete column 1.
[0043] Step 3: Install the self-resetting connector 5. Install the self-resetting connector 5 on the surface of the precast concrete beam 2. The vertical tie rod 6 passes through the vertical through hole 54. Use nuts to fix the two self-resetting connectors 5 on the upper and lower surfaces of the precast concrete beam 2.
[0044] Step four: Beam-column connection. Hoist the precast concrete beam 2 and install the end of the beam-column node embedded part 3 into the beam end embedded part 4. Then, install the buffer pad layer 9 on the connection surface between the precast concrete beam 2 and the precast concrete column 1. Use transverse tie rods 7 to pass through the transverse through holes 53 on the two self-resetting connectors 5 located on the left and right sides of the precast concrete column 1. Fit the disc springs 8 onto the transverse tie rods 7, and then tighten the connection with nuts to achieve a fixed connection between the precast concrete column 1 and the two precast concrete beams 2. After the connection is completed, there should still be a gap of not less than 15mm between the outer end of the beam-column node embedded part 3 and the deepest part of the inner cavity of the connecting steel sleeve 41.
[0045] The above embodiments are merely illustrative of the concept and implementation of the present invention and are not intended to limit it. Under the concept of the present invention, technical solutions without substantial changes are still within the scope of protection.
Claims
1. A prefabricated self-resetting reinforced concrete beam-column connection node, comprising a precast concrete column (1) and precast concrete beams (2) installed on both sides of the precast concrete column (1), wherein the precast concrete column (1) is composed of multiple column longitudinal bars (10), a plurality of column stirrups (11) spaced vertically along the column longitudinal bars (10), and column concrete (12) poured on the column longitudinal bars (10) and column stirrups (11); the precast concrete beam (2) is composed of upper beam longitudinal bars (20), lower beam longitudinal bars (21), a plurality of beam stirrups (22) spaced along the length of the upper beam longitudinal bars (20), and beam concrete (23) poured on the upper beam longitudinal bars (20), lower beam longitudinal bars (21), and beam stirrups (22); characterized in that: A beam-column joint embedded part (3) is provided on the precast concrete column (1) at the connection position. The beam-column joint embedded part (3) horizontally penetrates the precast concrete column (1), and both ends of the beam-column joint embedded part (3) extend to the outer side of the end of the precast concrete column (1). A beam end embedded part (4) is provided on the end of the precast concrete beam (2). The beam end embedded part (4) includes an anchoring steel plate (40), a connecting steel sleeve (41) fixedly set on one side of the anchoring steel plate (40), and a threaded sleeve (42) fixedly set on the anchoring steel plate (40). An opening is provided on the anchoring steel plate (40) at the position corresponding to the connecting steel sleeve (41). The anchoring steel plate (40) is set on the end of the precast concrete beam (2). The connecting steel sleeve (41) is located inside the precast concrete beam (2). One end of the upper beam longitudinal reinforcement (20) and the lower beam longitudinal reinforcement (21) are both installed on the threaded sleeve. 42) On the beam-column node embedded part (3), one end passes through the opening and is located in the inner cavity of the connecting steel sleeve (41); self-resetting connectors (5) are fixedly installed on the upper and lower sides of the precast concrete beam (2), the self-resetting connectors (5) include a vertically fixed end plate (50) and a bottom plate (51); the bottom plates (51) of the two self-resetting connectors (5) located on the upper and lower sides of the precast concrete beam (2) are fixedly connected to the precast concrete beam (2) through vertical tie rods (6); the end plates (50) of the two self-resetting connectors (5) located on the left and right sides of the precast concrete column (1) are fixedly connected to the precast concrete column (1) through horizontal tie rods (7), and a disc spring (8) is sleeved on the horizontal tie rod (7), the disc spring (8) is located between the locking nut and the self-resetting connector (5); a buffer pad (9) is provided between the precast concrete beam (2) and the precast concrete column (1).
2. The prefabricated self-resetting reinforced concrete beam-column connection node according to claim 1, characterized in that: The self-resetting connector (5) also includes a stiffening plate (52) disposed between the end plate (50) and the bottom plate (51). A transverse through hole (53) is provided on the end plate (50), through which the transverse tie rod (7) passes; and a vertical through hole (54) is provided on the bottom plate (51), through which the vertical tie rod (6) passes.
3. The prefabricated self-resetting reinforced concrete beam-column connection node according to claim 2, characterized in that: Two stiffening plates (52) are spaced apart, and the horizontal through hole (53) and the vertical through hole (54) are both located on the outside of the stiffening plate (52).
4. The prefabricated self-resetting reinforced concrete beam-column connection node according to claim 2 or 3, characterized in that: Two transverse through holes (53) are provided on the end plate (50) on each side of the stiffening plate (52); three vertical through holes (54) are provided on the bottom plate (51) on each side of the stiffening plate (52).
5. The prefabricated self-resetting reinforced concrete beam-column connection node according to claim 1, characterized in that: The thickness of the buffer pad layer (9) is not less than 15 mm.
6. The prefabricated self-resetting reinforced concrete beam-column connection node according to claim 1, characterized in that: The beam-column node embedded part (3) consists of an embedded steel plate (30) that is adapted to the inner cavity of the connecting steel sleeve (41) and a number of studs (31) fixedly installed on both sides of the middle part of the embedded steel plate (30).
7. The prefabricated self-resetting reinforced concrete beam-column connection node according to claim 6, characterized in that: Multiple studs (31) are also fixedly installed on the outside of the connecting steel sleeve (41).
8. A construction method for a prefabricated self-resetting reinforced concrete beam-column connection node as described in any one of claims 1 to 7, characterized in that: The construction method includes the following steps: Step 1, prefabrication of precast components, fabrication of beam end embedded parts (4): First, on the anchoring steel plate (40), at the installation positions corresponding to the upper beam longitudinal reinforcement (20) and the lower beam longitudinal reinforcement (21), threaded sleeves (42) are fixed by welding. Then, multiple steel plates are welded and spliced to form a connecting steel sleeve (41) with a rectangular cavity. Then, the connecting steel sleeve (41) is welded and fixed on the anchoring steel plate (40). Finally, studs (31) are welded on the surface of the connecting steel sleeve (41). Fabrication of beam-column node embedded parts (3): Cut and fabricate embedded steel plates (30) of appropriate size. Then, weld and fix multiple studs (31) on both sides of the middle part of the embedded steel plate (30). A self-resetting connector (5) is formed by welding and fixing the connecting end plate (50), the bottom plate (51) and the stiffening plate (52). Step 2: Fabrication of precast concrete columns (1) and precast concrete beams (2). The precast beam end embedded parts (4) and multiple vertical tie rods (6) are installed on the beam reinforcement frame composed of upper beam longitudinal reinforcement (20), lower beam longitudinal reinforcement (21), and beam stirrups (22). Threads are installed on the ends of the upper beam longitudinal reinforcement (20) and the lower beam longitudinal reinforcement (21). Then, the threaded ends of the upper beam longitudinal reinforcement (20) and the lower beam longitudinal reinforcement (21) are connected. Connect to the threaded sleeve (42); the installation position of multiple vertical tie rods (6) should correspond to the position of the vertical through hole (54) on the self-resetting connector (5), and finally set up the formwork and pour concrete to form a precast concrete beam (2); tie the column longitudinal reinforcement (10) and column stirrups (11) to form a column reinforcement frame, and then install the precast beam-column node embedded part (3) at the beam-column connection position, and finally set up the formwork and pour concrete to form a precast concrete column (1). Step 3: Install the self-resetting connector (5). Install the self-resetting connector (5) on the surface of the precast concrete beam (2). The vertical tie rod (6) passes through the vertical through hole (54). Use nuts to fix the two self-resetting connectors (5) on the upper and lower surfaces of the precast concrete beam (2). Step 4, beam-column connection: hoist the precast concrete beam (2), install the end of the beam-column node embedded part (3) into the embedded part (4) inserted into the beam end, and then install the buffer pad (9) on the connection surface between the precast concrete beam (2) and the precast concrete column (1); use the transverse tie rod (7) to pass through the transverse through hole (53) on the two self-resetting connectors (5) located on the left and right sides of the precast concrete column (1), put the disc spring (8) on the transverse tie rod (7), and then use the nut to tighten the connection to achieve the fixed connection between the precast concrete column (1) and the two precast concrete beams (2).