Welding-free aluminum alloy beam column joint structure

Abstract

The invention discloses a welding-free aluminum alloy beam column joint structure. The welding-free aluminum alloy beam column joint structure comprises a multi-cavity tubular column, a multi-cavity tubular beam, flange splicing corner fittings and bolts, wherein the flange splicing corner fittings are used for connecting the multi-cavity tubular column and the multi-cavity tubular beam. The multi-cavity pipe column comprises a central pipe I and a plurality of branch pipes I, the branch pipes I are connected to the outer side wall of the central column I at intervals, and a side groove I with an outward notch is defined by the adjacent branch pipes I and the outer side wall of the central column I. The multi-cavity tubular beam comprises a central tube II and four branch tubes II, the branch tubes II are connected to the outer side wall of the central tube II at intervals, and a side groove II or a side groove III with an outward notch is defined by the outer side wall of the adjacent branch tubes II and the outer side wall of the central tube II. The whole flange splicing corner fitting is of an L-shaped structure and comprises a vertical section connected with the multi-cavity tubular column and a horizontal section connected with the multi-cavity tubular beam, the vertical section and the horizontal section are both provided with tenons, and during assembling, the tenons of the vertical section are embedded into the side edge grooves I, and the tenons II of the horizontal section are embedded into the side edge grooves II.

Description

Technical Field

[0001] The invention relates to the field of building structural components, in particular to a welding-free aluminum alloy beam-column node structure. Background Art

[0002] Aluminum alloy frames refer to structural systems with a certain shape and function, which are assembled through specific connection methods using aluminum alloy as the main structural components. They are widely used in fields such as architecture and aerospace. Aluminum alloy frame beams and columns can be connected in a variety of ways, but compared to steel structures, aluminum alloy has many shortcomings in welding applicability. The main reasons are as follows:

[0003] ① Oxidation problem: Aluminum is very easy to oxidize in the air, and a dense oxide film will quickly form on the surface. Its melting point is as high as 2054℃, which is much higher than the melting point of aluminum (about 660℃). During the welding process, this oxide film will block the fusion of the metals, resulting in poor welding quality and defects such as lack of fusion and slag inclusion.

[0004] ② Aluminum has a much higher thermal conductivity and specific heat capacity than steel. This leads to faster heat dissipation during welding, requiring a higher heat input to ensure sufficient melting of the weld metal. This increases the difficulty of welding and may result in significant weld deformation.

[0005] ③ Porosity is easily generated. When welding aluminum, the solubility of hydrogen in liquid aluminum is much higher than in solid aluminum. During the solidification process of the weld, hydrogen does not have time to escape, resulting in pores. At the same time, the hydrogen generated by the decomposition of impurities such as moisture and oil during welding is also a major cause of pore formation.

[0006] ④ Prone to thermal cracking. Aluminum alloys experience a sharp drop in strength and plasticity at high temperatures, making thermal cracking more likely to occur in the heat-affected zone during welding. Furthermore, the linear expansion coefficient of aluminum alloys is twice that of steel, leading to greater thermal stress during welding, which also increases the tendency for thermal cracking.

[0007] ⑤ Joint softening: After aluminum alloy welding, the heat-affected zone is prone to softening, which reduces the strength and hardness of the joint. This will seriously affect the performance of structural parts that require high strength. Summary of the Invention

[0008] The purpose of the present invention is to provide two aluminum alloy beam-column node structures, one of which is a welding-free aluminum alloy beam-column node structure comprising a multi-cavity tube column, a multi-cavity tube beam, a flange splicing angle piece and a plurality of bolts.

[0009] The multi-lumen tubing string includes a central tube I and a plurality of branch tubes I.

[0010] Several of the branch pipes I are connected to the outer side wall of the central column I at intervals, so that adjacent branch pipes I and the outer side wall of the central column I form a side groove I with the notch facing outward.

[0011] The multi-cavity tube beam includes a central tube II and four branch tubes II.

[0012] Four branch tubes II are connected to the outer wall of the central tube II at intervals, forming a side groove II or side groove III with the outer wall of the adjacent branch tubes II and central tube II, with the groove opening facing outward. When the multi-cavity tubular beam is placed horizontally in the assembly direction, the side grooves on the upper and lower sides are designated as side grooves II, and the side grooves on the left and right sides are designated as side grooves III.

[0013] The multi-cavity tubular column and the multi-cavity tubular beam are connected by a plurality of flange splicing angle pieces and bolts.

[0014] The flange splicing corner piece is an L-shaped structure as a whole, including a vertical section connected to the multi-cavity pipe column and a horizontal section connected to the multi-cavity pipe beam.

[0015] The vertical section includes a vertical plate and a tenon I connected to the vertical plate.

[0016] The horizontal section includes a horizontal plate and a tenon II connected to the horizontal plate.

[0017] During assembly, the tenon is embedded in the side groove I, and the tenon II is embedded in the side groove II.

[0018] The second is a welding-free aluminum alloy beam-column node structure, including multi-cavity tubular columns, multi-cavity tubular beams and flange splicing angle pieces.

[0019] The multi-lumen tubing string includes a central tube 1 and four branch tubes 1.

[0020] The central tube 1 is a hollow octagonal aluminum alloy tube, and the branch tube 1 is a hollow pentagonal aluminum alloy tube.

[0021] The four branch pipes I are connected to the outer side wall of the central column I at intervals, so that adjacent branch pipes I and the outer side wall of the central column I form a side groove I with the notch facing outward.

[0022] The multi-cavity tube beam includes a central tube II and four branch tubes II.

[0023] The central tube II is a hollow octagonal aluminum alloy tube, and the branch tube II is a hollow pentagonal aluminum alloy tube.

[0024] Four branch tubes II are connected to the outer wall of the central tube II at intervals, forming a side groove II or side groove III with the outer wall of the adjacent branch tubes II and central tube II, with the groove opening facing outward. When the multi-cavity tubular beam is placed horizontally in the assembly direction, the side grooves on the upper and lower sides are designated as side grooves II, and the side grooves on the left and right sides are designated as side grooves III.

[0025] The multi-cavity tubular column and the multi-cavity tubular beam are connected by a plurality of flange splicing angle pieces and bolts.

[0026] The flange splicing corner piece is an L-shaped structure as a whole, including a vertical section connected to the multi-cavity pipe column and a horizontal section connected to the multi-cavity pipe beam.

[0027] The vertical section includes a vertical plate and a tenon I connected to the vertical plate.

[0028] The horizontal section includes a horizontal plate and a tenon II connected to the horizontal plate.

[0029] During assembly, the tenon is embedded in the side groove I, and the tenon II is embedded in the side groove II.

[0030] Furthermore, the line connecting the vertices on the cross-section of the multi-cavity tubular column and the multi-cavity tubular beam is a rectangle.

[0031] Furthermore, when the multi-cavity tube beam is placed horizontally and the cross-sectional height of the central tube II is greater than the cross-sectional length, the bottom wall length d of the side groove II is less than the bottom wall length e of the side groove III.

[0032] Furthermore, the outer contour of the tenon I is adapted to the shape of the side groove I; the outer contour of the tenon II is adapted to the shape of the side groove II.

[0033] The vertical section is fitted with the outer wall of the multi-lumen tubing column, and the vertical plate and the tenon 1 are respectively connected to the branch tube 1 and the central tube 1 through a plurality of bolts.

[0034] The horizontal section is fitted with the outer side wall of the multi-cavity tube beam, and the horizontal plate and the tenon II are respectively connected to the branch tube II and the central tube II through a plurality of bolts.

[0035] Furthermore, the multi-cavity tubular column and the multi-cavity tubular beam are connected by two web splicing angle pieces.

[0036] The web splicing angle piece is L-shaped as a whole and is an integrally formed component, including a splicing plate I connected to the multi-cavity tube beam and a splicing plate II connected to the multi-cavity tube column.

[0037] The splicing plate I extends into the central tube II and is connected to the bottom wall of the side groove III at one end of the multi-cavity tube beam by bolts. The splicing plate II extends out of the central tube II and is connected to the outer wall of the branch tube I by bolts.

[0038] The splicing plates II of the two web splicing angle pieces are arranged opposite to each other.

[0039] Furthermore, the outer wall contour of the splicing plate I is fitted with the bottom wall contour of the side groove III, and the outer wall contour of the splicing plate II is fitted with the outer wall contour of the branch pipe I.

[0040] Furthermore, the multi-cavity tubular column, multi-cavity tubular beam and flange splicing corner piece are an integrally formed structure.

[0041] Furthermore, when the multi-lumen tubular column is a center column, it is connected to four multi-lumen tubular beams. When the multi-lumen tubular column is a side column, it is connected to three multi-lumen tubular beams. When the multi-lumen tubular column is a corner column, it is connected to two multi-lumen tubular beams, and the two multi-lumen tubular beams are arranged in directions perpendicular to each other.

[0042] The technical effects of the present invention are undoubted, and the beneficial effects of the present invention are as follows:

[0043] ① The present invention provides a welding-free aluminum alloy frame beam-column connection node, which enhances the integrity, enables more uniform force transmission in the structure, effectively improves the overall mechanical properties and bearing capacity of the structure, and reduces the phenomenon of local stress concentration.

[0044] ② When installing the welding-free aluminum alloy frame beam-column connection node provided by the present invention, it is only necessary to fix the connecting parts to the beams and columns, without the need for a large amount of welding or other complicated processing operations on site, which can shorten the construction period to a limited extent and improve construction efficiency.

[0045] ③ The present invention does not require professional welding equipment and technicians, which reduces the construction difficulty and labor costs. In addition, there is no high-temperature welding operation during the construction process, and no pollution such as welding smoke and strong light will be generated. It improves the construction environment and reduces safety hazards.

[0046] ④ The construction quality of bolted connections is easier to inspect and control. Tools such as wrenches can be used to ensure that the bolts are tightened so that the torque meets the requirements, thereby ensuring the connection strength and avoiding internal defects such as slag inclusions, pores, and incomplete penetration caused by improper welding process parameters and operational errors.

[0047] ⑤ When aluminum alloy frames need to be modified, repaired, or replaced, bolted connections are easy to disassemble without damaging beams and columns. However, welded connections require cutting and grinding, which can damage the components. After repeated disassembly and reassembly, as long as the bolts and connectors are intact, the connection will maintain good performance. However, welded repairs may experience performance degradation.

[0048] ⑥ The present invention will not change the metallographic structure of the aluminum alloy material due to the high welding temperature, resulting in a decrease in material properties such as reduced strength and toughness, nor will it generate residual stress in the connection area like welding, effectively improving the reliability and service life of the structure.

[0049] ⑦ The use of multi-cavity sections can not only improve the local stable bearing capacity of the components, but also arrange pipelines in the cavity, reduce the number of external pipelines, and improve the aesthetics of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is the overall framework diagram;

[0051] Figure 2 Schematic diagram of the multi-lumen tubing column in Example 2;

[0052] Figure 3 for Figure 2 Front view of the multi-lumen tubing string;

[0053] Figure 4 for Figure 2 A top view of the multi-lumen tubing string;

[0054] Figure 5 Schematic diagram of the multi-cavity tubular beam in Example 2;

[0055] Figure 6 for Figure 5 Front view of the multi-cavity tubular beam;

[0056] Figure 7 for Figure 5 Left side view of the multi-cavity tubular beam;

[0057] Figure 8 Schematic diagram of the connection between the multi-lumen tubular column and the multi-lumen tubular beam when the multi-lumen tubular column is the middle column;

[0058] Figure 9 for Figure 8 The main view;

[0059] Figure 10 for Figure 8 A top view of

[0060] Figure 11 Schematic diagram of the connection between the multi-cavity tubular column and the multi-cavity tubular beam when the multi-cavity tubular column is a side column;

[0061] Figure 12 for Figure 11 The main view;

[0062] Figure 13 for Figure 11 Left view of;

[0063] Figure 14 for Figure 11 A top view of

[0064] Figure 15 Schematic diagram of the connection between the multi-cavity tubular column and the multi-cavity tubular beam when the multi-cavity tubular column is a corner column;

[0065] Figure 16 for Figure 15 The main view;

[0066] Figure 17 for Figure 15 Left view of;

[0067] Figure 18 for Figure 15 A top view of

[0068] Figure 19 The figure is a schematic diagram of the installation of flange splicing angle fittings and web splicing angle fittings;

[0069] Figure 20 This is a schematic diagram of the flange splicing corner piece;

[0070] Figure 21 Schematic diagram of web plate splicing corner pieces.

[0071] In the figure: 1-multi-cavity tubular column; 101-central tube I; 102-branch tube I; 103-side groove I; 2-multi-cavity tubular beam; 201-central tube II; 202-branch tube II; 203-side groove II; 204-side groove III; 2041-groove; 3-flange splicing angle fitting; 301-vertical section; 3011-tenon I; 302-horizontal section; 3021-tenon II; 4-web splicing angle fitting; 401-splicing plate I; 402-splicing plate II. DETAILED DESCRIPTION

[0072] The present invention will be further described below with reference to the following examples, but it should not be understood that the scope of the present invention is limited to the following examples. Without departing from the above technical ideas of the present invention, various substitutions and modifications can be made according to common technical knowledge and customary means in the art, and all should be included in the scope of protection of the present invention.

[0073] Example 1:

[0074] A welding-free aluminum alloy beam-column node structure comprises a multi-cavity tubular column 1, a multi-cavity tubular beam 2, a flange splicing angle piece 3 and a plurality of bolts.

[0075] The multi-lumen tubing string 1 includes a central tube 1101 and a plurality of branch tubes 1102 .

[0076] Several of the branch pipes I102 are connected to the outer side wall of the central column I101 at intervals, so that adjacent branch pipes I102 and the outer side wall of the central column I101 form a side groove I103 with the notch facing outward.

[0077] The multi-cavity tube beam 2 includes a central tube II 201 and four branch tubes II 202 .

[0078] Four branch tubes II 202 are connected to the outer wall of the central tube II 201 at intervals, so that adjacent branch tubes II 202 and the outer wall of the central tube II 201 form a side groove II 203 or side groove III 204 with the notch facing outward. When the multi-cavity tubular beam 2 is placed horizontally in the assembly direction, the side grooves on the upper and lower sides are designated as side grooves II 203, and the side grooves on the left and right sides are designated as side grooves III 204.

[0079] The multi-cavity tubular column 1 and the multi-cavity tubular beam 2 are connected by a plurality of flange splicing angle pieces 3 and bolts.

[0080] See also Figure 20 The flange splicing corner piece 3 is an L-shaped structure as a whole, including a vertical section 301 connected to the multi-cavity tubular column 1 and a horizontal section 302 connected to the multi-cavity tubular beam 2.

[0081] The vertical section 301 includes a vertical plate and a tenon I3011 connected to the vertical plate.

[0082] The horizontal section 302 includes a horizontal plate and a tenon II 3021 connected to the horizontal plate.

[0083] During assembly, the tenon 3012 is embedded in the side groove I103, and the tenon II3021 is embedded in the side groove II203.

[0084] Example 2:

[0085] The main structure of this embodiment is the same as that of embodiment 1. Figures 2 to 7 The multi-lumen tubing column 1 includes a central tube I101 and four branch tubes I102.

[0086] The central tube I101 is a hollow octagonal aluminum alloy tube, and the branch tube I102 is a hollow pentagonal aluminum alloy tube.

[0087] The four branch pipes I102 are connected to the outer side wall of the central column I101 at intervals, so that adjacent branch pipes I102 and the outer side wall of the central column I101 form a side groove I103 with the notch facing outward.

[0088] The multi-cavity tube beam 2 includes a central tube II 201 and four branch tubes II 202 .

[0089] The central tube II201 is a hollow octagonal aluminum alloy tube, and the branch tube II202 is a hollow pentagonal aluminum alloy tube.

[0090] Four branch tubes II 202 are connected to the outer wall of the central tube II 201 at intervals, so that adjacent branch tubes II 202 and the outer wall of the central tube II 201 form a side groove II 203 or side groove III 204 with the notch facing outward. When the multi-cavity tubular beam 2 is placed horizontally in the assembly direction, the side grooves on the upper and lower sides are designated as side grooves II 203, and the side grooves on the left and right sides are designated as side grooves III 204.

[0091] The multi-cavity tubular column 1 and the multi-cavity tubular beam 2 are connected by a plurality of flange splicing angle pieces 3 and bolts.

[0092] The flange splicing corner piece 3 is an L-shaped structure as a whole, including a vertical section 301 connected to the multi-cavity tubular column 1 and a horizontal section 302 connected to the multi-cavity tubular beam 2.

[0093] The vertical section 301 includes a vertical plate and a tenon I3011 connected to the vertical plate.

[0094] The horizontal section 302 includes a horizontal plate and a tenon II 3021 connected to the horizontal plate.

[0095] During assembly, the tenon 3012 is embedded in the side groove I103, and the tenon II3021 is embedded in the side groove II203.

[0096] Example 3:

[0097] The main structure of this embodiment is the same as any one of embodiments 1 to 2. Figure 4 、 Figure 7 When the central tube I101 and the central tube II201 are hollow octagonal aluminum alloy tubes, and the branch tubes I102 and the branch tube II202 are hollow pentagonal aluminum alloy tubes, the line connecting the vertices on the cross-section of the multi-lumen tubing string 1 and the multi-lumen tubing beam 2 forms a rectangle. The midpoint of the rectangle coincides with the midpoint of the multi-lumen tubing string 1 or the multi-lumen tubing beam 2.

[0098] Example 4:

[0099] The main structure of this embodiment is the same as any one of embodiments 1 to 3. Figure 4 When the central tube I101 and the central tube II201 are hollow octagonal aluminum alloy tubes, and the branch tubes I102 and the branch tubes II202 are hollow pentagonal aluminum alloy tubes, the cross section of the central tube I101 has eight sides, four of which are connected to the branch tube I102, and the remaining four sides b are the bottom walls of the groove I103.

[0100] Every side a is equal, and every side b is equal.

[0101] Example 5:

[0102] The main structure of this embodiment is the same as any one of embodiments 1 to 4. Figure 7 When the central tube I101 and the central tube II201 are hollow octagonal aluminum alloy tubes, the branch tubes I102 and the branch tubes II202 are hollow pentagonal aluminum alloy tubes, the multi-cavity tube beam 2 is placed horizontally, and the cross-sectional height of the central tube II201 is greater than the cross-sectional length, the bottom wall length d of the side groove II203 is less than the bottom wall length e of the side groove III204.

[0103] Example 6:

[0104] The main structure of this embodiment is the same as any one of Embodiments 1 to 5. Furthermore, the outer contour of the tenon I3011 is adapted to the shape of the side groove I103; the outer contour of the tenon II3021 is adapted to the shape of the side groove II203.

[0105] When the central tube I101 and the central tube II201 are hollow octagonal aluminum alloy tubes, and the branch tubes I102 and the branch tubes II202 are hollow pentagonal aluminum alloy tubes, the cross-sectional shape of the tenon I3011 and the tenon II3021 is a trapezoid.

[0106] Example 7:

[0107] The main structure of this embodiment is the same as any one of embodiments 1 to 6. Furthermore, the vertical section 301 is fitted with the outer wall of the multi-lumen tubing column 1, and the vertical plate and the tenon 13011 are respectively connected to the branch tube 1102 and the central tube 1101 through a plurality of bolts.

[0108] The horizontal section 302 is fitted with the outer wall of the multi-cavity tube beam 2, and the horizontal plate and the tenon II3021 are respectively connected to the branch tube II202 and the central tube II201 through a plurality of bolts.

[0109] Example 8:

[0110] The main structure of this embodiment is the same as any one of embodiments 1 to 6. Figure 19 The multi-cavity tubular column 1 and the multi-cavity tubular beam 2 are also connected by two web splicing angle pieces 4.

[0111] See also Figure 21 The web splicing angle piece 4 is L-shaped as a whole and is an integrally formed component, including a splicing plate I401 connected to the multi-cavity tube beam 2 and a splicing plate II402 connected to the multi-cavity tube column 1.

[0112] The splicing plate I401 extends into the central tube II201 and is connected to the bottom wall of the side groove III204 at one end of the multi-cavity tube beam 2 by bolts, and the splicing plate II402 extends out of the central tube II201 and is connected to the outer wall of the branch tube I102 by bolts.

[0113] The splicing plates II402 of the two web splicing angle pieces 4 are arranged opposite to each other.

[0114] Example 9:

[0115] The main structure of this embodiment is the same as that of embodiment 8. Figures 8-9 or Figures 11-13 or Figures 15-17 The outer wall contour of the splicing plate I401 fits with the bottom wall contour of the side groove III204, and the outer wall contour of the splicing plate II402 fits with the outer wall contour of the branch pipe I102.

[0116] Example 10:

[0117] The main structure of this embodiment is the same as any one of Embodiments 1 to 9. Furthermore, the multi-cavity tubular column 1, the multi-cavity tubular beam 2 and the flange splicing corner piece 3 are an integrally formed structure.

[0118] Example 11:

[0119] The main structure of this embodiment is the same as any one of embodiments 1 to 10. Figures 8 to 10 When the multi-cavity tubular column 1 is the central column, it is connected to four multi-cavity tubular beams 2 respectively. Figures 11 to 14 When the multi-cavity tubular column 1 is a side column, it is connected to three multi-cavity tubular beams 2 respectively. Figures 15 to 18 When the multi-cavity tubular column 1 is a corner column, it is connected to two multi-cavity tubular beams 2 respectively, and the two multi-cavity tubular beams 2 are arranged in perpendicular directions.

[0120] Each multi-cavity tubular beam 2 is connected to the multi-cavity tubular column 1 through two flange splicing angle pieces 3 and two web splicing angle pieces 4 .

[0121] The sizes of the flange splicing angle pieces 3 and the web splicing angle pieces 4 are adapted to the sizes of the multi-cavity tubular column 1 and the multi-cavity tubular beam 2 .

[0122] When the central tube I101 and the central tube II201 are hollow octagonal aluminum alloy tubes, and the branch tubes I102 and the branch tube II202 are hollow pentagonal aluminum alloy tubes, the specific dimensions are as follows: Figure 4 、 Figure 7 .

Claims

1. A welding-free aluminum alloy beam-column joint structure, characterized by: It comprises a multi-cavity tubular column (1), a multi-cavity tubular beam (2), a flange splicing angle piece (3) and a plurality of bolts; The multi-lumen tubing string (1) comprises a central tube I (101) and a plurality of branch tubes I (102); A plurality of branch pipes I (102) are connected to the outer side wall of the central column I (101) at intervals, so that adjacent branch pipes I (102) and the outer side wall of the central column I (101) form a side groove I (103) with the groove facing outward; The multi-cavity tube beam (2) comprises a central tube II (201) and four branch tubes II (202); Four branch pipes II (202) are connected to the outer side wall of the central pipe II (201) at intervals, so that the adjacent branch pipes II (202) and the outer side wall of the central pipe II (201) form a side groove II (203) or a side groove III (204) with the groove opening facing outward; when the multi-cavity tube beam (2) is placed horizontally according to the assembly direction, the side grooves located on the upper and lower sides are recorded as side grooves II (203), and the side grooves located on the left and right sides are recorded as side grooves III (204); The multi-cavity tubular column (1) and the multi-cavity tubular beam (2) are connected via a plurality of flange splicing angle pieces (3) and bolts; The flange splicing corner piece (3) is an L-shaped structure as a whole, comprising a vertical section (301) connected to the multi-cavity tubular column (1) and a horizontal section (302) connected to the multi-cavity tubular beam (2); The vertical section (301) includes a vertical plate and a tenon I (3011) connected to the vertical plate; The horizontal section (302) includes a horizontal plate and a tenon II (3021) connected to the horizontal plate; During assembly, the tenon (3012) is embedded in the side groove I (103), and the tenon II (3021) is embedded in the side groove II (203).

2. A welding-free aluminum alloy beam-column joint structure, characterized by: It comprises a multi-cavity tubular column (1), a multi-cavity tubular beam (2) and a flange splicing corner piece (3); The multi-lumen tubing column (1) comprises a central tube I (101) and four branch tubes I (102); The central tube I (101) is a hollow octagonal aluminum alloy tube, and the branch tube I (102) is a hollow pentagonal aluminum alloy tube; The four branch pipes I (102) are connected to the outer side wall of the central column I (101) at intervals, so that the adjacent branch pipes I (102) and the outer side wall of the central column I (101) form a side groove I (103) with the notch facing outward; The multi-cavity tube beam (2) comprises a central tube II (201) and four branch tubes II (202); The central tube II (201) is a hollow octagonal aluminum alloy tube, and the branch tube II (202) is a hollow pentagonal aluminum alloy tube; Four branch pipes II (202) are connected to the outer side wall of the central pipe II (201) at intervals, so that the adjacent branch pipes II (202) and the outer side wall of the central pipe II (201) form a side groove II (203) or a side groove III (204) with the groove opening facing outward; when the multi-cavity tube beam (2) is placed horizontally according to the assembly direction, the side grooves located on the upper and lower sides are recorded as side grooves II (203), and the side grooves located on the left and right sides are recorded as side grooves III (204); The multi-cavity tubular column (1) and the multi-cavity tubular beam (2) are connected via a plurality of flange splicing angle pieces (3) and bolts; The flange splicing corner piece (3) is an L-shaped structure as a whole, comprising a vertical section (301) connected to the multi-cavity tubular column (1) and a horizontal section (302) connected to the multi-cavity tubular beam (2). The vertical section (301) includes a vertical plate and a tenon I (3011) connected to the vertical plate; The horizontal section (302) includes a horizontal plate and a tenon II (3021) connected to the horizontal plate; During assembly, the tenon (3012) is embedded in the side groove I (103), and the tenon II (3021) is embedded in the side groove II (203).

3. The welding-free aluminum alloy beam-column node structure according to claim 2, characterized in that: The connecting line of each vertex on the cross section of the multi-cavity tubular column (1) and the multi-cavity tubular beam (2) is a rectangle.

4. The welding-free aluminum alloy beam-column node structure according to claim 2, characterized in that: When the multi-cavity tube beam (2) is placed horizontally and the cross-sectional height of the central tube II (201) is greater than the cross-sectional length, the bottom wall length d of the side groove II (203) is less than the bottom wall length e of the side groove III (204).

5. The welding-free aluminum alloy beam-column node structure according to claim 1 or 2, characterized in that: The outer contour of the tenon I (3011) is adapted to the shape of the side groove I (103); the outer contour of the tenon II (3021) is adapted to the shape of the side groove II (203).

6. The welding-free aluminum alloy beam-column node structure according to claim 1 or 2, characterized in that: The vertical section (301) is fitted with the outer wall of the multi-lumen tubing column (1), and the vertical plate and the tenon I (3011) are respectively connected to the branch tube I (102) and the central tube I (101) through a plurality of bolts; The horizontal section (302) is fitted with the outer wall of the multi-cavity tube beam (2), and the horizontal plate and the tenon II (3021) are respectively connected to the branch tube II (202) and the central tube II (201) through a plurality of bolts.

7. The welding-free aluminum alloy beam-column node structure according to claim 1 or 2, characterized in that: The multi-cavity tubular column (1) and the multi-cavity tubular beam (2) are further connected via two web splicing angle pieces (4); The web splicing angle piece (4) is L-shaped as a whole and is an integrally formed component, comprising a splicing plate I (401) connected to the multi-cavity tube beam (2) and a splicing plate II (402) connected to the multi-cavity tube column (1); The splicing plate I (401) extends into the central tube II (201) and is connected to the bottom wall of the side groove III (204) at one end of the multi-cavity tube beam (2) by bolts, and the splicing plate II (402) extends out of the central tube II (201) and is connected to the outer wall of the branch tube I (102) by bolts; The splicing plates II (402) of the two web splicing angle pieces (4) are arranged opposite to each other.

8. The welding-free aluminum alloy beam-column joint structure according to claim 7, characterized in that: The outer wall profile of the splicing plate I (401) fits with the bottom wall profile of the side groove III (204), and the outer wall profile of the splicing plate II (402) fits with the outer wall profile of the branch pipe I (102).

9. The welding-free aluminum alloy beam-column joint structure according to claim 1 or 2, characterized in that: The multi-cavity tubular column (1), the multi-cavity tubular beam (2) and the flange splicing corner piece (3) are an integrally formed structure.

10. The welding-free aluminum alloy beam-column node structure according to claim 1 or 2, characterized in that: When the multi-cavity tubular column (1) is a central column, it is connected to four multi-cavity tubular beams (2) respectively; when the multi-cavity tubular column (1) is a side column, it is connected to three multi-cavity tubular beams (2) respectively; when the multi-cavity tubular column (1) is a corner column, it is connected to two multi-cavity tubular beams (2) respectively, and the two multi-cavity tubular beams (20) are arranged in directions perpendicular to each other.

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