An aluminium alloy skew plate panel joint structure

Abstract

The utility model relates to an aluminum alloy skew plate type node structure, including main beam, secondary beam, node board and bolt assembly, the main beam is H shape continuous link member, the secondary beam is H shape discontinuous link member, the flange outside surface of main beam and secondary beam is located same plane, the end of secondary beam is equipped with skew end face, the plane of the web of secondary beam and the plane of skew end face is preset skew angle, the secondary beam installs in the one side of main beam web, the node board abuts at the flange outside surface of main beam and secondary beam respectively, and is connected the flange of main beam and secondary beam through bolt assembly respectively. Compared with prior art, the utility model has the advantages of main secondary beam skew angle adaptive flexible, simple structure, stress uniform structure stable etc.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering connection structures, and in particular to an aluminum alloy oblique plate type node structure. Background Technology

[0002] Aluminum alloy structures are widely used in modern large-span buildings due to their advantages such as lightweight, high strength, strong corrosion resistance, and aesthetic appeal. As the core force-transmitting components of the structure, the structural rationality of the joints directly determines the safety and stability of the overall structure. Currently, most existing aluminum alloy structures use orthogonal plate joints. These joints are bolted to orthogonally arranged members via upper and lower node plates, which can only meet the requirements of the member end edges and the direction of bolt arrangement in each row being perpendicular to the direction of internal forces.

[0003] As architectural designs become more diverse and artistic, an increasing number of projects require oblique beam connections. Traditional orthogonal plate joints have significant drawbacks: First, they cannot accommodate oblique angles within the range of 45°-90°. If forced to use them, complex weakening of the ends of the members is required, which not only affects the aesthetics of the building but also reduces the load-bearing capacity of the members. Second, the bolts are subjected to uneven stress during oblique connections, and the end bolts are prone to premature failure due to concentrated loads. Existing joints have not optimized the bolt arrangement and structural parameters for oblique structures. Therefore, there is an urgent need for an aluminum alloy skew plate joint that is simple in structure, easy to install, adaptable to skew angles, and has reasonable stress distribution, in order to fill the gap in existing technology and meet the actual needs of engineering projects. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, such as the inability of skew beams to adapt to large-angle skew or the inability to simultaneously consider both appearance and load-bearing capacity, and to provide an aluminum alloy skew plate node structure.

[0005] The objective of this utility model can be achieved through the following technical solutions: An aluminum alloy oblique plate node structure includes a main beam, a secondary beam, a node plate, and a bolt assembly; The main beam is an H-shaped continuous member, and the secondary beam is an H-shaped discontinuous member. The outer surfaces of the flanges of the main beam and the secondary beam are located in the same plane. The ends of the secondary beam are provided with oblique end faces, and the plane containing the web of the secondary beam and the plane containing the oblique end face form a predetermined oblique angle. The secondary beam is installed on one side of the web of the main beam, and the node plates abut against the outer surfaces of the flanges of the main beam and the secondary beam respectively, and are connected to the flanges of the main beam and the secondary beam respectively by bolt assemblies.

[0006] Preferably, the secondary beam includes a first sub-secondary beam and a second sub-secondary beam, which are centrally symmetrical on both sides of the web of the main beam. The node plate is fixed on the flange of the main beam and its two ends are respectively connected to the first sub-secondary beam and the second sub-secondary beam.

[0007] Preferably, the webs of the first and second sub-beams are located in the same plane, and the flanges of the main beam and the secondary beams are provided with a plurality of bolt holes along the oblique direction. The node plate is provided with through holes corresponding to the bolt holes and matching holes, and the bolt assembly is fixed through the through holes and bolt holes.

[0008] Preferably, the number of bolt holes on the flange of the secondary beam located at the angle between the plane of the secondary beam web and the plane of the oblique end face is 1-2 more than that on the opposite side.

[0009] Preferably, the bolt assembly includes a bolt, a nut, and a washer. The bolt passes through a through hole and a bolt hole in sequence and is connected to the nut to press and fix the node plate to the main beam flange or the secondary beam flange.

[0010] Preferably, the bolt and bolt hole are clearance fit, the bolt hole and through hole have the same diameter, and the preload of the bolt assembly is 3-3.5kN.

[0011] Preferably, the web of the secondary beam near the oblique end face has an overhang section, and the node structure further includes a web connector, one end of which is connected to the overhang section and the other end is connected to the web of the main beam.

[0012] Preferably, the web plate connector is an L-shaped rod, and the included angle between the two ends of the L-shaped rod is equal to a preset oblique angle.

[0013] Preferably, the range of the preset oblique angle is 45-90 degrees.

[0014] Preferably, the node plate is a parallelogram plate, and the thickness of the node plate is 6-8mm.

[0015] Compared with the prior art, the present invention has the following advantages: (1) This scheme sets a beveled end face at one end of the secondary beam, and the flanges of the secondary beam and the main beam are set parallel to each other. The flanges of the main beam and the secondary beam are connected with the node plate and bolt assembly to ensure the stability of the installation of the main beam and the secondary beam. At the same time, the angle between the web of the secondary beam and the beveled end face can be flexibly adapted to the oblique angle in the range of 45-90 degrees without weakening the end of the member, which meets the requirements of special architectural shapes and covers most oblique connection scenarios of aluminum alloy structures. All components are prefabricated in the factory and only bolt connection is required on site. The assembly efficiency is high, the flatness of the mating surface and the accuracy of the bolt spacing are strictly controlled to ensure stable installation quality and reduce the difficulty and cost of on-site construction.

[0016] (2) In this scheme, additional bolts are arranged near the oblique angle of the secondary beam flange to connect the node plate to the secondary beam flange. By optimizing the bolt arrangement and adjusting the connection parameters of the bolt assembly, the problem of uneven bolt force during oblique connection is solved.

[0017] (3) This scheme can selectively set web plate connectors according to shear requirements. The basic type node is suitable for low shear load scenarios, while the enhanced type node uses web plate connectors to assist in force transmission, increasing shear bearing capacity by 15%-20%, and adapting to engineering requirements of different stress levels.

[0018] (4) Compared with traditional slab nodes, the oblique slab nodes of this scheme can retain one continuous member. When connecting a small number of members, the node size can be reduced, and the node will not affect the building's aesthetics. Attached Figure Description

[0019] Figure 1 A cross-sectional view of the oblique plate node structure provided by this utility model; Figure 2 A top view of the oblique plate node structure provided by this utility model; In the diagram: 1. Main beam, 2. Secondary beam, 3. Node plate, 4. Bolt assembly, 21. First sub-secondary beam, 22. Second sub-secondary beam, 31. Area A, 32. Area O. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] Example like Figure 1 and Figure 2 As shown, this embodiment provides an aluminum alloy oblique plate node structure, including a main beam 1, a secondary beam 2, a node plate 3, and a bolt assembly 4; The main beam 1 is an H-shaped continuous member, and the secondary beam 2 is an H-shaped discontinuous member. The outer surfaces of the flanges of the main beam 1 and the secondary beam 2 are located in the same plane. The end of the secondary beam 2 is provided with a beveled end face. The plane containing the web of the secondary beam 2 and the plane containing the beveled end face form a predetermined oblique angle. Secondary beam 2 is installed on one side of the web of main beam 1. Node plates 3 abut against the outer sides of the flanges of main beam 1 and secondary beam 2 respectively, and are connected to the flanges of main beam 1 and secondary beam 2 respectively by bolt assembly 4.

[0027] In this embodiment, the secondary beam 2 includes a first sub-secondary beam 21 and a second sub-secondary beam 22. The first sub-secondary beam 21 and the second sub-secondary beam 22 are centrally symmetrical on both sides of the web of the main beam 1. The node plate 3 is fixed on the flange of the main beam 1 and its two ends are respectively connected to the first sub-secondary beam 21 and the second sub-secondary beam 22.

[0028] Furthermore, the webs of the first secondary beam 21 and the second secondary beam 22 are located in the same plane, and multiple bolt holes are provided on the flanges of the main beam 1 and the secondary beam 2 along the oblique direction. The node plate 3 is provided with through holes corresponding to the bolt holes and matching holes, and the bolt assembly 4 is fixed through the through holes and bolt holes.

[0029] Specifically, main beam 1 is a continuous H-shaped member made of 6061-T6 aluminum alloy, with φ10-14mm bolt holes along the oblique direction, suitable for M8-M12 bolts. Secondary beam 2 is a discontinuous H-shaped member of the same material, with the ends beveled at an oblique angle of 45-90 degrees, and the flatness error of the cut edge is less than or equal to 0.2mm. Matching bolt holes are made corresponding to the bolt holes of the main beam to ensure a tight fit with the gusset plate 3. The gusset plate is a parallelogram plate made of 6061-T6 aluminum alloy with a thickness of 6-8mm.

[0030] A beveled end face is provided at one end of the secondary beam, and the flanges of the secondary beam are parallel to those of the main beam. The flanges of the main and secondary beams are connected using gusset plates and bolt assemblies, ensuring the stability of the installation. Simultaneously, the angle between the web of the secondary beam and the beveled end face can flexibly adapt to oblique angles within the range of 45-90 degrees without weakening the ends of the members, meeting the requirements of special architectural shapes. Its applicability covers most oblique connection scenarios in aluminum alloy structures. All components are prefabricated in the factory, requiring only bolt connections on site, resulting in high assembly efficiency. Strict control over the flatness of the mating surfaces and the precision of bolt spacing ensures stable installation quality and reduces on-site construction difficulty and cost. Preferred implementation methods, such as Figure 2 As shown, the secondary beam 2 has 1-2 more bolt holes on the flange of the side where the plane of the secondary beam web and the plane of the oblique end face are located compared to the opposite side. The surface area of ​​the mating node plate 3 is divided into two stress concentration zones: zone A 31 and zone O 32. Zone A 31 has 1-2 more bolts than zone O 32 to balance the forces. Considering the uneven internal forces within the node, the number of bolts optimizes the balance of forces in the equilibrium zones, eliminating the need for complex internal force correction calculations and reducing design complexity.

[0031] In this embodiment, the bolt assembly 4 includes a bolt, a nut, and a washer. The bolt passes through the through hole and the bolt hole in sequence and is connected to the nut to press and fix the node plate to the main beam flange or the secondary beam flange. The bolt and the bolt hole are clearance fit, and the bolt hole and the through hole have the same diameter. The preload of the bolt assembly 4 is 3kN.

[0032] Specifically, the stainless steel bolt assembly uses A2-50 or A2-70 type stainless steel bolts with a shank diameter of 8-12mm and a hole diameter 0.2-0.5mm larger than the shank diameter to avoid installation interference. The preload is 3kN to ensure stable connection. Matching nuts and washers are provided; the washers are made of stainless steel with a thickness of 1-2mm to enhance the fit between the bolts and the node plate 3. The bolts are arranged in double rows and multiple columns along the connection surface between the main beam flange and the secondary beam flange. The bolt end distance e1 ≥ 2.5d0, the bolt edge distance e2 ≥ 1.5d0, the bolt center distance p1 ≥ 3.0d0 along the internal force direction, and the bolt center distance p2 ≥ 2.5d0 perpendicular to the internal force direction. Here, d0 represents the bolt diameter.

[0033] Additional bolts were installed near the oblique angle of the secondary beam flange to connect the gusset plate to the secondary beam flange. By optimizing the bolt arrangement and adjusting the connection parameters of the bolt assembly, the problem of uneven bolt stress during oblique connection was solved.

[0034] In an optional implementation, the web of the secondary beam 2 near the oblique end face has an overhanging section. The node structure also includes a web connector, one end of which is connected to the overhanging section, and the other end is connected to the web of the main beam 1. The web connector is an L-shaped member, and the included angle between the two ends of the L-shaped member is equal to a preset oblique angle. Alternatively, T-shaped members can be used for connection, ensuring uniform stress on the web during connection.

[0035] Specifically, the web plate connector is made of 6061-T6 aluminum alloy plate. One end of the web plate connector has a first connecting hole corresponding to the secondary beam web. The end of the secondary beam web extends outward to form an overhang section. The overhang section has a second connecting hole corresponding to the first connecting hole. Bolts are inserted into the first and second connecting holes to fix the web plate connector to the secondary beam web. The other end of the web plate connector has a third connecting hole corresponding to the main beam web. The main beam web has a fourth connecting hole corresponding to the third connecting hole. Bolts are inserted into the third and fourth connecting holes to fix the web plate connector to the main beam web.

[0036] Web plate connectors can be selectively set according to shear requirements. Basic nodes are suitable for low shear load scenarios, while enhanced nodes use web plate connectors to assist in force transmission, increasing shear bearing capacity by 15%-20%, adapting to engineering requirements of different stress levels.

[0037] In this embodiment, the preset skew angle range is 45-90 degrees. The angle of the oblique end face of the secondary beam can be adjusted according to actual needs, thereby flexibly adapting to the application scenarios of the skew beam. In addition, the node plate can adopt a one-piece structure to connect the main beam and the two secondary beams, or it can adopt a segmented structure, using two node plates to connect the two sub-secondary beams to the main beam respectively.

[0038] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An aluminum alloy oblique plate type node structure, characterized in that, It includes the main beam (1), secondary beam (2), gusset plate (3) and bolt assembly (4); The main beam (1) is an H-shaped continuous member, and the secondary beam (2) is an H-shaped discontinuous member. The outer surfaces of the flanges of the main beam (1) and the secondary beam (2) are located in the same plane. The end of the secondary beam (2) is provided with a beveled end face. The plane containing the web of the secondary beam (2) and the plane containing the beveled end face form a preset oblique angle. The secondary beam (2) is installed on one side of the web of the main beam (1), and the node plate (3) abuts against the outer side of the flange of the main beam (1) and the secondary beam (2) respectively, and is connected to the flange of the main beam (1) and the secondary beam (2) respectively by bolt assembly (4).

2. The aluminum alloy oblique plate node structure according to claim 1, characterized in that, The secondary beam (2) includes a first sub-secondary beam (21) and a second sub-secondary beam (22). The first sub-secondary beam (21) and the second sub-secondary beam (22) are centrally symmetrical on both sides of the web of the main beam (1). The node plate (3) is fixed on the flange of the main beam (1) and its two ends are respectively connected to the first sub-secondary beam (21) and the second sub-secondary beam (22).

3. The aluminum alloy oblique plate node structure according to claim 2, characterized in that, The webs of the first sub-beam (21) and the second sub-beam (22) are located in the same plane. Multiple bolt holes are provided on the flanges of the main beam (1) and the secondary beam (2) along the oblique direction. Through holes corresponding to the bolt holes and matching holes are provided on the node plate (3). The bolt assembly (4) is fixed through the through holes and bolt holes.

4. The aluminum alloy oblique plate node structure according to claim 3, characterized in that, The secondary beam (2) has 1-2 more bolt holes on the flange of the side where the plane of the secondary beam web is located and the plane of the oblique end face are located than on the opposite side.

5. The aluminum alloy oblique plate node structure according to claim 3, characterized in that, The bolt assembly (4) includes a bolt, a nut and a washer. The bolt passes through the through hole and the bolt hole in sequence and is connected to the nut to press and fix the node plate to the flange of the main beam or the flange of the secondary beam.

6. The aluminum alloy oblique plate node structure according to claim 5, characterized in that, The bolt and bolt hole are clearance fit, the bolt hole and the through hole have the same diameter, and the preload of the bolt assembly (4) is 3-3.5kN.

7. The aluminum alloy oblique plate node structure according to claim 1, characterized in that, The secondary beam (2) has an overhanging section on the web near the oblique end face. The node structure also includes a web connector, one end of which is connected to the overhanging section and the other end is connected to the web of the main beam (1).

8. The aluminum alloy oblique plate node structure according to claim 7, characterized in that, The web plate connector is an L-shaped rod, and the included angle between the two ends of the L-shaped rod is equal to a preset oblique angle.

9. The aluminum alloy oblique plate node structure according to claim 1, characterized in that, The preset oblique angle ranges from 45 to 90 degrees.

10. The aluminum alloy oblique plate node structure according to claim 1, characterized in that, The node plate (3) is a parallelogram plate, and the thickness of the node plate (3) is 6-8mm.

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