A strong node connection structure system of a fabricated concrete structure

Abstract

The application discloses a strong node connecting structure system of a fabricated concrete structure, relates to the technical field of building node connecting, and comprises a foundation column connecting assembly fixedly installed at the end of a foundation assembly, a column connecting assembly fixedly installed at the end of a column assembly, a beam connecting assembly fixedly installed at the end of a beam assembly and a beam-column node connecting assembly, the foundation column connecting assembly is fixedly connected with the column connecting assembly, the column connecting assembly is fixedly connected with the beam-column node connecting assembly, and the beam connecting assembly is fixedly connected with the beam-column node connecting assembly. The square tube of the foundation column connecting assembly and the beam-column node connecting assembly is provided with a spline piece, which can effectively resist horizontal shear stress and seismic force; the beam connecting assembly and the secondary beam connecting assembly adopt a first upper connecting plate, a first middle connecting plate and a first lower connecting plate in a upper-middle-lower separated mode, and when the main beam and the secondary beam are subjected to tension at the upper part and compression at the lower part, the main beam and the secondary beam can bear load bending moment and resist torsional deformation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building node connection, in particular to a strong node connection structure system of fabricated concrete structure. BACKGROUND

[0002] Fabricated building refers to the transfer of a large number of on-site operations in traditional construction methods to the factory, processing and manufacturing building components and accessories (such as floor slabs, wall panels, stairs, balconies, etc.) in the factory, transporting them to the construction site, and assembling and installing them on site through connecting methods. Fabricated building mainly includes prefabricated concrete structure, steel structure, modern wood structure building, etc., because it adopts standardized design, factory production, assembly construction, information management and intelligent application, it is a representative of modern industrialized production. Compared with traditional buildings, the most core advantage of fabricated buildings is to reduce pollution and emissions. Fabricated building is the only way for traditional building to transform into green building, and is an important link to achieve the double carbon goal. According to estimates, the carbon emissions of various types of fabricated buildings during the construction phase can be reduced by about 20% compared to cast-in-place; due to the use of new materials, carbon emissions can be reduced by nearly 40% in the whole life cycle. At present, most of the nodes of fabricated buildings use a connection method similar to the beam-column-wall connection of steel structures, that is, a simply supported beam stress form similar to the connection of the web of an H-shaped steel beam. Due to the characteristics of large self-weight and uneven material precision of fabricated concrete components, it cannot meet the seismic force and torsional resistance requirements in seismic areas. Severe earthquakes mostly occur in the core area of column and beam-column joints, and joint failure is mainly shear failure and steel anchorage failure, which can cause the entire frame to collapse. In high-rise buildings, horizontal load and seismic action will become the dominant control factor. Therefore, the node connection part of fabricated buildings still has room for improvement. SUMMARY

[0003] The purpose of the present application is to provide a strong node connection structure system of fabricated concrete structure to solve the above problems.

[0004] The present application achieves the above-mentioned purpose by the following technical solutions:

[0005] A strong node connection structure system of fabricated concrete structure, comprising a foundation column connection assembly fixedly installed at the end of a foundation assembly, a column connection assembly fixedly installed at the end of a column assembly, a beam connection assembly fixedly installed at the end of a beam assembly, and a beam-column joint connection assembly, the foundation column connection assembly is fixedly connected with the column connection assembly, the column connection assembly is fixedly connected with the beam-column joint connection assembly, and the beam connection assembly is fixedly connected with the beam-column joint connection assembly.

[0006] Preferably, the column connecting assembly comprises a square tube, a seat plate and a first mounting plate, the square tube is internally fixedly provided with spline pieces, the seat plate and the first mounting plate are sequentially fixedly sleeved on the outer side of the square tube, the first mounting plate is made of carbon structural steel or low-alloy high-strength structural steel, the seat plate and the first mounting plate are fixedly provided with a rib plate at the corner position therebetween, the seat plate is provided with through holes at positions corresponding to the main reinforcement of the foundation assembly, and the first mounting plate is provided with mounting holes.

[0007] Further, the number of spline pieces is 4-8.

[0008] Preferably, the column connecting assembly comprises a square tube, a seat plate, a second mounting plate and a cover plate, the seat plate and the second mounting plate are sequentially fixedly sleeved on the outer side of the square tube, the second mounting plate is made of carbon structural steel or low-alloy high-strength structural steel, the seat plate and the second mounting plate are fixedly provided with a rib plate at the corner position therebetween, the seat plate is provided with through holes at positions corresponding to the main reinforcement of the column assembly, the second mounting plate is provided with mounting holes, the second mounting plate cooperates with the first mounting plate, the square tube is fixedly provided, at one end close to the seat plate, with the cover plate, the cover plate is centrally provided with a ventilation hole, the cover plate is provided, at a side close to the square tube, with spline anchor bars, and the seat plate is provided, between the square tube and the through holes, with a reinforcing plate. Meanwhile, grouting overflow hole pipes are arranged at the four corners of the top of the square tube and the cover plate.

[0009] Preferably, the beam connecting assembly comprises a first end plate, a first upper connecting plate, a first middle connecting plate and a first lower connecting plate, the first end plate is sequentially fixedly provided, at one side thereof from top to bottom, with the first upper connecting plate, the first middle connecting plate and the first lower connecting plate, the first upper connecting plate, the first middle connecting plate and the first lower connecting plate are all made of carbon structural steel or low-alloy high-strength structural steel, the first upper connecting plate is parallel to the first lower connecting plate, the first middle connecting plate is perpendicular to the first upper connecting plate and the first lower connecting plate, the first upper connecting plate, the first middle connecting plate and the first lower connecting plate are all provided with mounting holes, the first end plate is fixedly provided, at the other side thereof close to the upper and lower ends, with rib plates, and the first end plate is fixedly connected with the main reinforcement of the beam assembly.

[0010] Preferably, the beam-column joint connecting assembly comprises a square tube, a second upper connecting plate, a second middle connecting plate, a second lower connecting plate, a third mounting plate and a fourth mounting plate, the second upper connecting plate, the second middle connecting plate, the second lower connecting plate, the third mounting plate and the fourth mounting plate are all made of carbon structural steel or low-alloy high-strength structural steel, the square tube is internally and fixedly provided with a spline, the third mounting plate, the second upper connecting plate, the second middle connecting plate, the second lower connecting plate and the fourth mounting plate are sequentially and fixedly sleeved on the outer side of the square tube, the third mounting plate and the second upper connecting plate are fixedly provided with a rib plate between them and at the corner positions thereof, the second upper connecting plate and the second lower connecting plate are fixedly provided with a rib plate between them and at the corner positions thereof, the second lower connecting plate and the fourth mounting plate are fixedly provided with a rib plate between them and at the corner positions thereof, the third mounting plate, the second upper connecting plate, the second middle connecting plate, the second lower connecting plate and the fourth mounting plate are all provided with mounting holes, the second upper connecting plate is parallel to the second lower connecting plate, and the second middle connecting plate is perpendicular to the second upper connecting plate and the second lower connecting plate.

[0011] Further, the second upper connecting plate and the second lower connecting plate are both in cross-shaped distribution.

[0012] Preferably, the beam-column joint connecting assembly comprises a square tube, a second upper connecting plate, a second middle connecting plate, a second lower connecting plate, a third mounting plate and a fourth mounting plate, the second upper connecting plate, the second middle connecting plate, the second lower connecting plate, the third mounting plate and the fourth mounting plate are all made of carbon structural steel or low-alloy high-strength structural steel, the square tube is internally and fixedly provided with a spline, the third mounting plate, the second upper connecting plate, the second middle connecting plate, the second lower connecting plate and the fourth mounting plate are sequentially and fixedly sleeved on the outer side of the square tube, the third mounting plate and the second upper connecting plate are fixedly provided with a rib plate between them and at the corner positions thereof, the second upper connecting plate and the second lower connecting plate are fixedly provided with a rib plate between them and at the corner positions thereof, the second lower connecting plate and the fourth mounting plate are fixedly provided with a rib plate between them and at the corner positions thereof, the third mounting plate, the second upper connecting plate, the second middle connecting plate, the second lower connecting plate and the fourth mounting plate are all provided with mounting holes, the second upper connecting plate is parallel to the second lower connecting plate, and the second middle connecting plate is perpendicular to the second upper connecting plate and the second lower connecting plate.

[0013] Further, the second upper connecting plate and the second lower connecting plate are both in cross-shaped distribution.

[0014] The present application can be used in the steel-concrete structure, the fabricated building industry, the fabricated concrete frame and shear wall structure, the fabricated steel-reinforced concrete composite (hybrid) structure, the concrete frame-shear cylinder structure in the housing construction industry, and can also be used in the local column-beam system building in the traffic and water conservancy engineering.

[0015] The beneficial effects of the present application are that: (1) the spline piece is arranged in the square tube of the foundation column connecting assembly and the beam column joint connecting assembly, so that the square tube of the foundation column connecting assembly and the square tube of the column connecting assembly are connected in a sleeved manner, and the square tube of the column connecting assembly and the square tube of the beam column joint connecting assembly are connected in a sleeved manner, which is more reliable, and can effectively resist horizontal shear stress and earthquake force; (2) the rib plate is arranged on the foundation column connecting assembly, the column connecting assembly and the beam column joint connecting assembly, so as to ensure that the connecting joint can effectively resist the axial eccentric compression force of the column or beam and resist the bending moment; (3) the beam connecting assembly and the secondary beam connecting assembly adopt the upper-middle-lower separated structure of the first upper connecting plate, the first middle connecting plate and the first lower connecting plate, when the main beam and the secondary beam are subjected to tension at the upper part and compression at the lower part, the main beam and the secondary beam can bear the load bending moment and resist the torsion deformation, at the same time, the first middle connecting plate can resist the shear stress or dynamic load punching shear force, and can bear part of the bending moment; (4) the first mounting plate, the second mounting plate, the first upper connecting plate, the first middle connecting plate, the first lower connecting plate, the second upper connecting plate, the second middle connecting plate, the second lower connecting plate, the third mounting plate and the fourth mounting plate are made of carbon structural steel or low-alloy high-strength structural steel, so as to ensure the rigidity and strength of the joint position, and ensure the stability and safety of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an assembled perspective view of the present application;

[0017] Figure 2 It is a first split view of the present application;

[0018] Figure 3 It is a second split view of the present application;

[0019] Figure 4 It is a perspective view of the foundation column connecting assembly of the present application;

[0020] Figure 5 It is a perspective view of the column connecting assembly of the present application;

[0021] Figure 6 It is an enlarged schematic view of the column connecting assembly of the present application;

[0022] Figure 7 It is a perspective view of the cover plate of the present application;

[0023] Figure 8 It is a perspective view of the beam connecting assembly of the present application;

[0024] Figure 9 It is a perspective view of the beam column joint connecting assembly of the present application;

[0025] Figure 10 It is a cooperation schematic view of the beam column joint connecting assembly, the column connecting assembly and the beam connecting assembly of the present application;

[0026] Figure 11 This is a perspective view of the secondary beam connection assembly of the present invention;

[0027] Figure 12 This is a schematic diagram of the secondary beam connection component of the present invention and its connection with the precast concrete main beam.

[0028] Explanation of reference numerals in the attached figures:

[0029] 11. Foundation components; 111. Foundation column; 12. Precast concrete column; 121. Main reinforcement; 13. Precast concrete main beam; 14. Precast concrete secondary beam;

[0030] 2. Foundation column connection assembly; 21. Square tube; 22. Seat plate; 23. First mounting plate; 24. Spline plate; 25. Rib plate; 26. Through hole; 27. Mounting hole;

[0031] 3. Column connection assembly; 31. Second mounting plate; 32. Cover plate; 33. Reinforcing plate; 34. Vent hole; 35. Spline anchor bar;

[0032] 4. Beam connection assembly; 41. First end plate; 42. First upper connection plate; 43. First middle connection plate; 44. First lower connection plate;

[0033] 5. Beam-column joint connection assembly; 51. Second upper connection plate; 52. Second middle connection plate; 53. Second lower connection plate; 54. Third mounting plate; 55. Fourth mounting plate;

[0034] 6. Secondary beam connection assembly; 61. Second end plate; 62. Upper anchor plate; 63. Middle anchor plate; 64. Lower anchor plate; 65. Rear anchor plate. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings:

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, this invention provides a strong joint connection structure system for prefabricated concrete structures, including a foundation column connection component 2 fixedly installed at the end of a foundation component 11, a column connection component 3 fixedly installed at the end of a column component, a beam connection component 4 fixedly installed at the end of a beam component, and a beam-column joint connection component 5. The foundation column connection component 2 is fixedly connected to the column connection component 3, the column connection component 3 is fixedly connected to the beam-column joint connection component 5, and the beam connection component 4 is fixedly connected to the beam-column joint connection component 5. The foundation component 11 is provided with foundation columns 111, the column components can be precast concrete columns 12, and the beam components include precast concrete main beams 13 and precast concrete secondary beams 14.

[0037] like Figure 4As shown, based on the above embodiment, the foundation column connection assembly 2 further includes a square tube 21, a base plate 22, and a first mounting plate 23. Splined plates 24 are fixedly installed inside the square tube 21. The number of splined plates 24 is 4 to 8, and can be increased or decreased through mechanical calculations. In this embodiment, there are 4 splined plates 24. The number of splined plates 24 is increased based on different seismic intensities, building functional loads, floor heights, and dynamic loads of industrial plants, through calculations to fully resist horizontal seismic forces. The splined plates 24 are fixedly welded to the square tube 21 using a mechanical welding machine. The base plate 22 and the first mounting plate 23 are sequentially fixedly mounted on the outer surface of the square tube 21, and are fixedly connected to the square tube 21 by welding. The first mounting plate 23 is made of carbon structural steel or low-alloy high-strength structural steel. Ribs 25 are fixedly installed between the base plate 22 and the first mounting plate 23, located at their corners. In this embodiment, both the base plate 22 and the first mounting plate 23 are rectangular plates with four ribs 25 at their four corners. The ribs 25 are fixedly connected to the base plate 22, the first mounting plate 23, and the square tube 21 by welding. Through holes 26 are provided on the base plate 22 at positions corresponding to the main reinforcing bars 121 of the foundation component 11, and mounting holes 27 are provided on the first mounting plate 23. The through holes 26 on the base plate 22 mate with the main reinforcing bars 121 of the foundation column 111, and then double-sided penetration welding is used to increase the connection strength and ensure stability and reliability between the foundation column connecting component 2 and the foundation column 111.

[0038] like Figure 5 , Figure 6 and Figure 7As shown, based on the above embodiment, the column connection assembly 3 further includes a square tube 21, a base plate 22, a second mounting plate 31, and a cover plate 32. The base plate 22 and the second mounting plate 31 are sequentially fixedly mounted on the outer side of the square tube 21. The base plate 22 and the second mounting plate 31 are fixedly connected to the square tube 21 by welding. The second mounting plate 31 is made of carbon structural steel or low-alloy high-strength structural steel. Ribs 25 are fixedly provided between the base plate 22 and the second mounting plate 31 at their corner positions. The precast concrete column 12 is the main load-bearing component, and the ribs 25 can ensure that the nodes of the precast concrete column 12 can effectively resist the eccentric compression of the axially eccentric column and resist the bending moment. Through holes 26 are provided on the base plate 22 at positions corresponding to the main reinforcement 121 of the column assembly, and mounting holes 27 are provided on the second mounting plate 31. The through hole 26 on the base plate 22 mates with the main reinforcement 121 inside the precast concrete column 12, and then double-sided penetration welding is used to make the connection strength between the column connection component 3 and the precast concrete column 12 higher, more stable and reliable. The second mounting plate 31 mates with the first mounting plate 23 to realize the fixed connection between the foundation column 111 and the precast concrete column 12. The precast concrete column 12 is the first line of defense against seismic forces and should be in an elastic working state. When the seismic intensity is ≤7 degrees, the second mounting plate 31 and the first mounting plate 23 are connected with high-strength bolts of grade 10.9 or above. When the seismic intensity is >7 degrees, the second mounting plate 31 and the first mounting plate 23 are connected by a bolt-welded combination. The welding quality of the second mounting plate 31 and the first mounting plate 23 is inspected according to the rigid connection requirements. A cover plate 32 is fixedly installed at one end of the square tube 21 near the base plate 22. A vent hole 34 is machined at the center of the cover plate 32. The vent hole 34 allows for more uniform and dense grouting inside the square tube 21, particularly preventing air blockage and voids at the top and corners of the square tube 21. A spline anchor bar 35 is provided on the side of the cover plate 32 near the square tube 21. The diameter of the spline anchor bar 35 is determined based on the cross-sectional dimensions of the precast concrete column 12, the building height, and the seismic resistance level. The square tube 21 is filled with a high-strength inorganic self-compacting micro-expansion grouting material, ensuring high reliability when the square tube 21 of the foundation column connection assembly 2 is fitted into the square tube 21 of the column connection assembly 3. A reinforcing plate 33 is provided on the base plate 22 between the square tube 21 and the through hole 26. The reinforcing plate 33 further ensures the precast concrete column 12 connection node effectively resists eccentric compression and bending moment from axially eccentric columns.

[0039] like Figure 8As shown, based on the above embodiment, the beam connection assembly 4 further includes a first end plate 41, a first upper connecting plate 42, a first middle connecting plate 43, and a first lower connecting plate 44. The precast concrete main beam 13 serves as an important horizontal force transmission component and is also a major seismic lateral force resisting and energy dissipation component. The first upper connecting plate 42, the first middle connecting plate 43, and the first lower connecting plate 44 are fixedly installed on one side of the first end plate 41 from top to bottom. The first upper connecting plate 42, the first middle connecting plate 43, and the first lower connecting plate 44 are all made of carbon structural steel or low alloy high-strength structural steel. The first upper connecting plate 42 is parallel to the first lower connecting plate 44, and the first middle connecting plate 43 is perpendicular to the first upper connecting plate 42 and the first lower connecting plate 44. The first upper connecting plate 42, the first middle connecting plate 43, and the first lower connecting plate 44 adopt an upper, middle, and lower separated structural design to meet the characteristics of the precast concrete main beam 13 being under tension at the top and compression at the bottom, while bearing the load bending moment and resisting the torsional deformation, and facilitating the on-site interlocking and overlapping installation of the column-beam joint. Mounting holes 27 are provided on the first upper connecting plate 42, the first middle connecting plate 43, and the first lower connecting plate 44. Ribs 25 are fixedly installed on the other side of the first end plate 41 near the upper and lower ends. The ribs 25 are fixedly connected to the main reinforcement 121 of the precast concrete main beam 13 by welding. The first end plate 41 is fixedly connected to the main reinforcement 121 of the beam assembly by double-sided penetration weld, ensuring a reliable connection between the first end plate 41 and the main reinforcement 121.

[0040] like Figure 8As shown, based on the above embodiments, the beam-column joint connection assembly 5 further includes a square tube 21, a second upper connecting plate 51, a second middle connecting plate 52, a second lower connecting plate 53, a third mounting plate 54, and a fourth mounting plate 55. The beam-column joint connection assembly 5 is an important structure connecting beams and columns. The main function of the beam-column joint connection assembly 5 is to transfer loads and transfer them to adjacent components, such as the most important shear force and bending moment transfer, as well as the transfer of axial force and torque. The second upper connecting plate 51, the second middle connecting plate 52, the second lower connecting plate 53, the third mounting plate 54, and the fourth mounting plate 55 are all made of carbon structural steel or low-alloy high-strength structural steel. A spline plate 24 is fixedly installed inside the square tube 21. The square tube 21 and the spline plate 24 fully meet the design concept of strong column-weak beam, strong shear-weak bending, and strong joint-strong anchorage. A third mounting plate 54, a second upper connecting plate 51, a second middle connecting plate 52, a second lower connecting plate 53, and a fourth mounting plate 55 are sequentially fixed to the outer surface of the square tube 21. Ribs 25 are fixedly installed between the third mounting plate 54 and the second upper connecting plate 51, at their corners; ribs 25 are fixedly installed between the second upper connecting plate 51 and the second lower connecting plate 53, at their corners; and ribs 25 are fixedly installed between the second lower connecting plate 53 and the fourth mounting plate 55, at their corners. The ribs 25 effectively resist eccentric compression and bending moment. Mounting holes 27 are provided on the third mounting plate 54, the second upper connecting plate 51, the second middle connecting plate 52, the second lower connecting plate 53, and the fourth mounting plate 55. The second upper connecting plate 51 and the second lower connecting plate 53 are parallel, and the second middle connecting plate 52 is perpendicular to the second upper connecting plate 51 and the second lower connecting plate 53. The second upper connecting plate 51, the second middle connecting plate 52, and the second lower connecting plate 53 adopt an upper, middle, and lower separated structural design, which can better transfer the shear stress and bending moment of the main beam, while resisting torsional deformation, and also facilitates the on-site overlapping and installation of column-beam joints. The second upper connecting plate 51 and the second lower connecting plate 53 are both distributed in a cross shape.

[0041] like Figure 11As shown, based on the above embodiment, it further includes a secondary beam connection assembly 64 fixedly installed on the beam assembly. The secondary beam connection assembly 64 can realize the fixed connection between the precast concrete main beam 13 and the precast concrete secondary beam 14. The precast concrete secondary beam 14 serves as the main force-transmitting component bearing vertical loads. The secondary beam connection assembly 64 includes a second end plate 61, a first upper connection plate 42, a first middle connection plate 43, a first lower connection plate 44, an upper anchor plate 62, a middle anchor plate 63, and a lower anchor plate 64. The first upper connection plate 42, the first middle connection plate 43, and the first lower connection plate 44 are fixedly installed sequentially from top to bottom on one side of the second end plate 61. The first upper connection plate 42 and the first lower connection plate 44 are parallel, and the first middle connection plate 43 is perpendicular to the first upper connection plate 42 and the first lower connection plate 44. Mounting holes 27 are provided on the first upper connecting plate 42, the first middle connecting plate 43, and the first lower connecting plate 44. On the other side of the second end plate 61, from top to bottom, an upper anchor plate 62, a middle anchor plate 63, and a lower anchor plate 64 are fixedly installed sequentially. The upper anchor plate 62 is parallel to the lower anchor plate 64, and the middle anchor plate 63 is perpendicular to both the upper and lower anchor plates 62 and 64. A rear anchor plate 65 is fixedly installed at the end of each of the upper, middle, and lower anchor plates 64 away from the second end plate 61. The rear anchor plate 65 is perpendicular to the upper, middle, and lower anchor plates 62, 63, and 64. The upper, middle, lower, and rear anchor plates 62, 63, and 64 are all made of carbon structural steel or low-alloy high-strength structural steel. The rear anchor plate 65 primarily bears and transmits tensile stress for anchoring.

[0042] During installation, (1) such as Figure 2 and Figure 4 As shown, the base plate 22 of the foundation column connecting assembly 2 is fixedly connected to the foundation column 111 by welding to achieve the fixed connection between the foundation column connecting assembly 2 and the foundation column 111; (2) as Figure 5 As shown, the base plate 22 of the column connection assembly 3 is fixedly connected to the main reinforcement 121 of the precast concrete column 12 by welding to achieve the fixed connection between the column connection assembly 3 and the precast concrete column 12; (3) as Figure 1 and Figure 10 As shown, the first end plate 41 of the beam connection assembly 4 is fixedly connected to the main reinforcement 121 of the precast concrete main beam 13 or the precast concrete secondary beam 14 by welding, thereby realizing the fixed connection between the beam connection assembly 4 and the precast concrete main beam 13 or the precast concrete secondary beam 14; (4) as Figure 11 and Figure 12 As shown, the upper anchor plate 62, middle anchor plate 63, lower anchor plate 64, and rear anchor plate 65 on the secondary beam connecting assembly 64 are pre-embedded in the precast concrete main beam 13 to achieve a fixed connection between the secondary beam connecting assembly 64 and the precast concrete main beam 13. During assembly, (1) as Figure 4As shown, the first mounting plate 23 of the foundation column connecting assembly 2 on the foundation column 111 corresponds to the second mounting plate 31 of the column connecting assembly 3 on the precast concrete column 12. According to actual requirements, they are fixedly connected by bolts or welding to achieve a fixed connection between the foundation column 111 and the precast concrete column 12; (2) as Figure 10 As shown, the second mounting plate 31 of the column connection assembly 3 on the precast concrete column 12 corresponds to the fourth mounting plate 55 of the beam-column node connection assembly 5. According to actual requirements, they are fixedly connected by bolts or welding to achieve the fixed connection between the precast concrete column 12 and the beam-column node connection assembly 5; (3) as Figure 10 As shown, the first upper connecting plate 42, the first middle connecting plate 43, and the first lower connecting plate 44 of the beam connection assembly 4 on the precast concrete main beam 13 correspond to the second upper connecting plate 51, the second middle connecting plate 52, and the second lower connecting plate 53 of the beam-column node connection assembly 5, respectively. According to actual requirements, they are fixedly connected by bolts or welding to realize the fixed connection between the precast concrete main beam 13 and the beam-column node connection assembly 5; (4) as Figure 1 , Figure 11 and Figure 12 As shown, the first upper connecting plate 42, the first middle connecting plate 43, and the first lower connecting plate 44 of the beam connecting assembly 4 on the precast concrete secondary beam 14 correspond to the first upper connecting plate 42, the first middle connecting plate 43, and the first lower connecting plate 44 of the secondary beam connecting assembly 64 on the precast concrete main beam 13, respectively. According to actual requirements, they are fixedly connected by bolts or welding to achieve a fixed connection between the precast concrete secondary beam 14 and the precast concrete main beam 13.

[0043] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Those skilled in the art should understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and all such changes should be covered within the protection scope of the present invention. The protection scope of the present invention is defined by the claims and their equivalents.

Claims

1. A strong joint connection structure system for prefabricated concrete structures, characterized in that: It includes a foundation column connection assembly fixedly installed at the end of the foundation component, a column connection assembly fixedly installed at the end of the column component, a beam connection assembly fixedly installed at the end of the beam component, and a beam-column node connection assembly. The foundation column connection assembly is fixedly connected to the column connection assembly, the column connection assembly is fixedly connected to the beam-column node connection assembly, and the beam connection assembly is fixedly connected to the beam-column node connection assembly. The foundation column connection assembly includes a square tube, a base plate, and a first mounting plate. A spline plate is fixedly installed inside the square tube. The base plate and the first mounting plate are sequentially fixed on the outer surface of the square tube. The first mounting plate is made of carbon structural steel or low-alloy high-strength structural steel. Ribs are fixedly installed between the base plate and the first mounting plate at their corner positions. Through holes are provided on the base plate at positions corresponding to the main reinforcement of the foundation assembly. Mounting holes are provided on the first mounting plate. The column connection assembly includes a square tube, a base plate, a second mounting plate, and a cover plate. The base plate and the second mounting plate are sequentially fixed to the outer surface of the square tube. The second mounting plate is made of carbon structural steel or low-alloy high-strength structural steel. Ribs are fixedly provided between the base plate and the second mounting plate at their corner positions. Through holes are provided on the base plate at positions corresponding to the main reinforcement bars of the column assembly. Mounting holes are provided on the second mounting plate, which mates with the first mounting plate. A cover plate is fixedly installed on one end of the square tube near the base plate. A vent hole is machined at the center of the cover plate. Spline anchor bars are provided on the side of the cover plate near the square tube. A reinforcing plate is provided on the base plate between the square tube and the through hole. High-strength inorganic self-compacting micro-expansion grouting material is filled inside the square tube. The beam-column joint connection assembly includes a square tube, a second upper connecting plate, a second middle connecting plate, a second lower connecting plate, a third mounting plate, and a fourth mounting plate. The second upper connecting plate, second middle connecting plate, second lower connecting plate, third mounting plate, and fourth mounting plate are all made of carbon structural steel or low-alloy high-strength structural steel. A spline plate is fixedly installed inside the square tube. The third mounting plate, second upper connecting plate, second middle connecting plate, second lower connecting plate, and fourth mounting plate are sequentially fixedly mounted on the outer surface of the square tube. Ribs are fixedly installed between the third mounting plate and the second upper connecting plate, at their corner positions; ribs are fixedly installed between the second upper connecting plate and the second lower connecting plate, at their corner positions; and ribs are fixedly installed between the second lower connecting plate and the fourth mounting plate. Mounting holes are provided on the third mounting plate, second upper connecting plate, second middle connecting plate, second lower connecting plate, and fourth mounting plate. The second upper connecting plate is parallel to the second lower connecting plate, and the second middle connecting plate is perpendicular to the second upper connecting plate and the second lower connecting plate. The beam connection assembly includes a first end plate, a first upper connection plate, a first middle connection plate, and a first lower connection plate. The first upper connection plate, the first middle connection plate, and the first lower connection plate are fixedly installed on one side of the first end plate from top to bottom. The first upper connection plate, the first middle connection plate, and the first lower connection plate are all made of carbon structural steel or low alloy high-strength structural steel. The first upper connection plate is parallel to the first lower connection plate, and the first middle connection plate is perpendicular to the first upper connection plate and the first lower connection plate. Mounting holes are provided on the first upper connection plate, the first middle connection plate, and the first lower connection plate. Ribs are fixedly provided on the other side of the first end plate near the upper and lower ends. The first end plate is fixedly connected to the main reinforcement of the beam assembly. The first upper connecting plate, the first middle connecting plate, and the first lower connecting plate of the beam connection assembly correspond to the second upper connecting plate, the second middle connecting plate, and the second lower connecting plate of the beam-column node connection assembly, respectively, and are fixedly connected by bolts or welding.

2. The strong joint connection structure system for prefabricated concrete structures according to claim 1, characterized in that: The number of spline plates is 4 to 8.

3. The strong joint connection structure system for prefabricated concrete structures according to claim 1, characterized in that: Both the second upper connecting plate and the second lower connecting plate are arranged in a cross shape.

4. The strong joint connection structure system for prefabricated concrete structures according to claim 1, characterized in that: It also includes a secondary beam connection assembly fixedly installed on the beam assembly. The secondary beam connection assembly includes a second end plate, a first upper connection plate, a first middle connection plate, a first lower connection plate, an upper anchor plate, a middle anchor plate, and a lower anchor plate. The first upper connection plate, the first middle connection plate, and the first lower connection plate are fixedly installed sequentially from top to bottom on one side of the second end plate. The first upper connection plate is parallel to the first lower connection plate, and the first middle connection plate is perpendicular to the first upper connection plate and the first lower connection plate. Mounting holes are provided on the first upper connection plate, the first middle connection plate, and the first lower connection plate. The upper anchor plate, the middle anchor plate, and the lower anchor plate are fixedly installed sequentially from top to bottom on the other side of the second end plate. The upper anchor plate is parallel to the lower anchor plate, and the middle anchor plate is perpendicular to the upper anchor plate and the lower anchor plate. A rear anchor plate is fixedly provided at the end of the upper anchor plate, the middle anchor plate, and the lower anchor plate away from the second end plate. The rear anchor plate is perpendicular to the upper anchor plate, the middle anchor plate, and the lower anchor plate.

5. The strong joint connection structure system for prefabricated concrete structures according to claim 4, characterized in that: The upper anchor plate, middle anchor plate, lower anchor plate, and rear anchor plate are all made of carbon structural steel or low-alloy high-strength structural steel.

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