Fork type steel structure connecting joint

Abstract

The utility model relates to a crotch type steel structure connecting joint which comprises a supporting inclined section, a supporting straight section, a chord member set and a web member set. The end face of the supporting inclined section is connected with one end face of the supporting straight section, the central axis of the supporting inclined section intersects with the central axis of the supporting straight section, and the intersection point is A; the chord member group and the web member group are connected to the supporting straight section so as to form a crotch shape with the supporting straight section; and the central axes of the chord member group, the web member group and the supporting straight section are intersected at the same point, and the intersection point is B and is positioned at the upper part of the intersection point A. The connecting node has the advantages that the intersection point A and the intersection point B are located at different positions on the central axis of the supporting straight section, stress concentration of the connecting node is avoided, effectiveness of connection is guaranteed, and therefore the overall performance of the connecting node is improved.

Description

Technical Field

[0001] This utility model relates to the field of building steel structure technology, specifically a tree-branch type steel structure connection node. Background Technology

[0002] In the field of steel structure design, the design of connection nodes is crucial. When steel column supports are connected to truss chords and web members, multiple members intersect to form a tree-branch-like node. Such nodes are subject to complex stresses and require strict construction quality.

[0003] Traditional designs have at least the following shortcomings that require improvement: the column support cross-section is relatively small, resulting in narrow spacing between welds of various members, limited construction space, and difficulty in ensuring welding quality, which in turn affects the reliability of the connection; at the same time, increasing the cross-section of the entire column for construction convenience leads to material waste and structural self-weight issues; in addition, the interface between the vertical and inclined sections of the column support at some nodes is often located at the center point of the node, which can easily cause stress concentration, reduce the overall performance of the node, and affect the safety and durability of the structure. Utility Model Content

[0004] This utility model addresses the technical problems existing in the prior art by providing a tree-branch type steel structure connection node, which reduces the overall cost, facilitates construction, and ensures the integrity and safety of the node.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A tree-branch type steel structure connection node, including a support inclined section, a support straight section, a chord group, and a web member group;

[0006] The end face of the inclined support section is connected to one end face of the straight support section, and the central axis of the inclined support section intersects the central axis of the straight support section at point A.

[0007] The chord group and the web group are both connected to the support straight section to form a tree-branch shape with the support straight section; the central axes of the chord group, the web group, and the support straight section intersect at the same point, and the intersection point is B, which is located above the intersection point A.

[0008] As a further technical solution, the supporting inclined section includes a connecting section, an intermediate section, and a tail section connected in sequence, and the connecting section, the intermediate section, and the tail section are coaxial.

[0009] The end of the connecting segment away from the middle segment is connected to one end of the supporting straight segment, and the included angle between the connecting segment and the supporting straight segment is greater than 90 degrees;

[0010] The end cross-section of the connecting segment is larger than the end cross-section of the tail segment.

[0011] As a further technical solution, the middle section is frustum-shaped, and the outer diameter of the end of the middle section connected to the connecting section is larger than the outer diameter of the end of the middle section connected to the tail section.

[0012] As a further technical solution, the slope of the outer wall of the middle section is 1:6 to 1:8.

[0013] As a further technical solution, the chord group includes a first main chord, a second main chord, a first chord, a second chord, a third chord, and a fourth chord;

[0014] The first main chord and the second main chord are respectively connected to both sides of the support straight section, and the angle between the first chord and the support straight section is equal to the angle between the second main chord and the support straight section;

[0015] The first chord and the fourth chord are both connected to the side of the support straight section where the first main chord is located, and the second chord and the third chord are both connected to the side of the support straight section where the second main chord is located.

[0016] As a further technical solution, the first chord and the third chord are both located on the side of the support straight section near the connecting section, and the first main chord, the second main chord, the second chord, and the fourth chord are all located above the first chord and the third chord.

[0017] As a further technical solution, the central axis of the first main chord, the central axis of the second main chord, the central axis of the first chord, the central axis of the second chord, the central axis of the third chord, and the central axis of the fourth chord all intersect on the central axis of the support straight section, and the intersection point is A.

[0018] As a further technical solution, the web member assembly includes a first main web member, a second main web member, a first web member, and a second web member;

[0019] The first main web member and the first web member are both connected to the side of the support straight section where the first main chord is located, and the second main web member and the second web member are both connected to the side of the support straight section where the second main chord is located.

[0020] As a further technical solution, the central axis of the first main web member, the central axis of the second main web member, the central axis of the first web member, and the central axis of the second web member all intersect on the central axis of the support straight section, and the intersection point is A.

[0021] As a further technical solution, stiffening ribs are provided at the connection between the inclined support section and the straight support section.

[0022] The beneficial effects of this utility model are:

[0023] 1. Intersection points A and B are located at different positions on the central axis of the straight support section, which avoids stress concentration at the connection node, ensures the effectiveness of the connection, and thus improves the overall performance of the connection node;

[0024] 2. The specific structural design of the inclined and straight support sections increases the support cross-section, making the weld spacing of each member larger, which facilitates construction and ensures a more reliable connection. In addition, the cross-sectional dimensions of the components can be reasonably adjusted, which can improve the strength of the connection nodes, save materials, and reduce the self-weight of the structure. Attached Figure Description

[0025] Figure 1 This utility model provides a front view structural diagram of a tree-branch-shaped steel structure connection node;

[0026] Figure 2 This is a side view of a tree-branch-shaped steel structure connection node according to the present invention.

[0027] Figure 3 This utility model provides a top view of a tree-branch-shaped steel structure connection node;

[0028] Figure 4 for Figure 3 A cross-sectional view along the TT line.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] Supporting inclined section 1, connecting section 11, middle section 12, and tail section 13;

[0031] Supporting straight segment 2;

[0032] String group 3, first main chord 31, second main chord 32, first chord 33, second chord 34, third chord 35, fourth chord 36;

[0033] 4. Main abdominal strut group 41, main abdominal strut 42, first abdominal strut 43, second abdominal strut 44;

[0034] 5 stiffening ribs. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In the description of this application, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0037] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0038] Example 1

[0039] To reduce overall cost and ensure the integrity and safety of the joints while facilitating construction, this embodiment provides a tree-branch type steel structure connection joint. (See attached image) Figures 1-4 It includes the inclined support section 1, the straight support section 2, the chord group 3, and the web member group 4;

[0040] The end face of the inclined support section 1 is connected to one end face of the straight support section 2, and the central axis of the inclined support section 1 intersects the central axis of the straight support section 2 at point A.

[0041] The chord group 3 and the web group 4 are both connected to the supporting straight section 2 to form a tree-like structure with the supporting straight section 2. The central axes of the chord group 3, the web group 4, and the supporting straight section 2 intersect at the same point, and the intersection point is B, which is located above the intersection point A. This avoids stress concentration caused by weld accumulation. In other words, stress transfer is carried out during use, so that the connection node can better withstand external forces and maintain a stable shape and mechanical properties. This avoids excessive structural deformation or even instability due to excessive local stress, and extends the service life of the connection node.

[0042] For example, the angle formed by the inclined support section 1 and the straight support section 2 is 150°~170°.

[0043] In the specific implementation process, the supporting inclined section 1 includes a connecting section 11, a middle section 12, and a tail section 13 connected in sequence;

[0044] The end of the connecting segment 11 away from the middle segment 12 is connected to one end of the supporting straight segment 2. The angle between the connecting segment 11 and the supporting straight segment 2 is greater than 90 degrees. The end cross-section of the connecting segment 11 is larger than the end cross-section of the tail segment 13. The end cross-section is reduced at non-node locations to reduce the weight of the connecting node and facilitate installation.

[0045] For example, the connecting section 11, the intermediate section 12, and the tail section 13 are welded together, such as by butt welding, electroslag welding, automatic and semi-automatic submerged arc welding; the end section wall thickness and outer diameter of the connecting section 11 are the same as those of the end section wall thickness and outer diameter of the supporting straight section 2, so that the connection is of equal strength and the stress is transferred smoothly, and the connecting section 11 and the supporting straight section 2 can be welded.

[0046] A stiffening rib 5 is provided at the connection between the inclined support section 1 and the straight support section 2 to improve the stress distribution of the node, enhance the stability and load-bearing capacity of the node, and the stiffening rib 5 is welded to the straight support section 2 and the connecting section 11 to strengthen the integrity of the connection between the straight support section 2 and the inclined support section 1.

[0047] For example, the middle section 12 is frustum-shaped, and the outer diameter of the end of the middle section 12 connected to the connecting section 11 is larger than the outer diameter of the end of the middle section 12 connected to the tail section 13, so that the supporting inclined section 1 has variable cross-section characteristics, so that the stress transition is more stable. That is, during use, the stress at the node is gradually transitioned to the stress at the member, making the force transmission more reliable and the node bearing capacity higher.

[0048] It should be noted that the connecting segment 11, the intermediate segment 12, and the tail segment 13 share a common centerline (i.e., the centerline along the length of the supporting inclined segment 1), ensuring a consistent force transmission path, more reliable force distribution, and improved stability and load-bearing capacity of the connection node. Furthermore, the slope of the outer wall of the intermediate segment 12 is 1:6 to 1:8, and the intermediate segment 12 is a hollow structure, further reducing the weight of the connection node.

[0049] In the specific implementation process, see Figures 1-4 The string group 3 includes a first main string 31, a second main string 32, a first string 33, a second string 34, a third string 35, and a fourth string 36.

[0050] The first main chord 31 and the second main chord 32 are respectively connected to both sides of the support straight section 2, so that the force on both sides is uniform and the force transmission is reliable. The included angle between the first main chord 31 and the support straight section 2 is equal to the included angle between the second main chord 32 and the support straight section 2, for example, the included angle is 90°.

[0051] The first chord 33 and the fourth chord 36 are both connected to the side of the support straight section 2 where the first main chord 31 is located. The second chord 34 and the third chord 35 are both connected to the side of the support straight section 2 where the second main chord 32 is located. This design allows for a larger weld spacing when the rods are welded to the support straight section 2, facilitating installation and operation while ensuring more even force distribution on both sides. This also facilitates the transmission of axial force and bending moment and is suitable for applications requiring the connection of multiple rods. The required rods can be selected and connected to the external connection points as needed, offering wide adaptability. For example, the welding of each rod to the support straight section 2 can be either a slit weld or a fillet weld, and all rods are located near the support inclined section 1.

[0052] For example, the first chord 33 and the third chord 35 are both located on the side of the support straight section 2 near the connecting section 11, and the first main chord 31, the second main chord 32, the second chord 34, and the fourth chord 36 are all located above the first chord 33 and the third chord 35. The nodes are more evenly stressed, the bearing capacity is higher, and the gap between each member is further increased, which facilitates construction and strengthens the connection stability.

[0053] It should be noted that the central axis of the first main chord 31, the central axis of the second main chord 32, the central axis of the first chord 33, the central axis of the second chord 34, the central axis of the third chord 35, and the central axis of the fourth chord 36 all intersect on the central axis of the support straight section 2, and the intersection point is A.

[0054] In the specific implementation process, see Figures 1-4 The abdominal strut group 4 includes a first main abdominal strut 41, a second main abdominal strut 42, a first abdominal strut 43, and a second abdominal strut 44;

[0055] The first main web member 41 and the first web member 43 are both connected to the side of the support straight section 2 where the first main chord member 31 is located. The second main web member 42 and the second web member 44 are both connected to the side of the support straight section 2 where the second main chord member 32 is located. This can expand the application scenarios of the connection node to adapt to more complex steel structure connections.

[0056] For example, in this embodiment, when each rod is fixedly connected to the support straight section 2, it can be a slit weld or a corner weld.

[0057] Furthermore, the central axis of the first main web member 41, the central axis of the second main web member 42, the central axis of the first web member 43, and the central axis of the second web member 44 all intersect on the central axis of the support straight section 2, and the intersection point is A.

[0058] For example, the first main chord 31, the first main web member 41, and the supporting straight section 2 are located in the same plane, such as plane M; the second main chord 32, the second main web member 42, and the supporting straight section 2 are located in the same plane, such as plane N; the angle between plane M and plane N is 170-180°; the angle between the first main web member 41 and the first main chord 31, and the angle between the second main chord 32 and the second main web member 42 are both 30-60°.

[0059] For example, the first chord 33, the first web member 43, and the supporting straight section 2 are located in the same plane, such as plane P; the second chord 34 and the supporting straight section 2 are located in the same plane, such as plane O; the angle between plane P and plane O is 170-180°; the angle between the first chord 33 and the supporting straight section 2 is 100-120°; the angle between the first web member 43 and the supporting straight section 2 is 30-60°; and the angle between the second chord 34 and the supporting straight section 2 is 60-80°.

[0060] For example, the third chord 35, the second web member 44, and the supporting straight section 2 are located in the same plane, such as plane Q; the fourth chord 36 and the supporting straight section 2 are located in the same plane, such as plane R; the angle between plane Q and plane R is 170-180°; the angle between the third chord 35 and the supporting straight section 2 is 120-150°; the angle between the second web member 44 and the supporting straight section 2 is 30-60°; and the angle between the fourth chord 36 and the supporting straight section 2 is 60-80°.

[0061] For ease of construction, the connecting section 11, the tail section 13, the supporting straight section 2, the first main chord 31, the second main chord 32, the first chord 33, the second chord 34, the third chord 35, the fourth chord 36, the first main web member 41, the second main web member 42, the first web member 43, and the second web member 44 are all circular steel pipes.

[0062] In the chord group 3, the shortest vertical distance d between the chord closest to the connecting segment 11 and the interface between the supporting straight segment 2 and the connecting segment 11 is greater than or equal to 200mm. For example, if the third chord 35 is the closest to the connecting segment 11, then the lowest point S at the connection between the third chord 35 and the supporting straight segment 2 has a shortest vertical distance d between the supporting straight segment 2 and the interface between the connecting segment 11 and the connecting segment 11 that is greater than or equal to 200mm. That is, the vertical distance between point S and the interface between the connecting segment 11 and the supporting straight segment 2 is at least 200mm. This ensures that the welds are staggered, avoids weld accumulation, guarantees the effectiveness of the welded connection, reduces stress concentration, and makes the connection between each member and the supporting straight segment 2 more reliable, further improving the load-bearing capacity and service life of the connection node.

[0063] For example, in this embodiment, the strength of the materials used in each structure is Q235B or Q355B. Appropriate welding materials, welding methods and welding processes are selected according to the welding base material, welding position and weld type, and they meet the corresponding welding standards. The steel plate thickness, weld leg size, etc. are selected according to the design calculation requirements.

[0064] Welding methods include butt welding, electroslag welding with a melting nozzle, and automatic and semi-automatic submerged arc welding.

[0065] Compared with traditional structures, this embodiment can significantly reduce the amount of materials used and the weight of the structure, while taking into account the feasibility and convenience of on-site construction.

[0066] Example 2

[0067] Based on Embodiment 1, a specific structure for a connection node is provided, which is as follows:

[0068] (1) Regarding the support inclined segment 1:

[0069] The tail section 13 can have an outer diameter of 600 mm, a wall thickness of 30 mm, and a length of 600 mm.

[0070] The middle section 12 has an outer diameter of 600mm at one end and 800mm at the other end, a wall thickness of 30mm, a length of 800mm, and an outer wall slope of 1:8.

[0071] The connecting section 11 has an outer diameter of 800mm, a wall thickness of 30mm, and a length of 800~950mm; the connecting section 11, the intermediate section 12, and the tail section 13 are butt welded together by full penetration butt welding.

[0072] (2) Regarding support segment 2:

[0073] The straight support section 2 has an outer diameter of 800mm, a wall thickness of 30mm, and a length of 1600~1750mm. It is welded to the connecting section 11 by a full penetration butt weld, and the stiffening rib 5 is provided at the joint surface. The stiffening rib 5 has a wall thickness of 30mm. The angle between the inclined support section 11 and the straight support section 2 is 154°.

[0074] (3) Regarding chord group 3:

[0075] The first main chord 31 and the second main chord 32 both have an outer diameter of 351 mm, a wall thickness of 16 mm, and a length of 1200 mm; the first main web member 41 and the second main web member 42 both have an outer diameter of 203 mm, a wall thickness of 8 mm, and a length of 1500 mm; the included angle between the first main web member 41 and the first main chord 31, and the included angle between the second main chord 32 and the second main web member 42, are both 37°; the included angle between plane M and plane N is 176°;

[0076] The outer diameter of the first chord 33 and the second chord 34 are both 273 mm, the wall thickness is both 12 mm, and the length is both 700 mm; the outer diameter of the first web member 43 is 168 mm, the wall thickness is 8 mm, and the length is 850 mm; the angle between the first chord 33 and the supporting straight section 2 is 106°; the angle between the first web member 43 and the supporting straight section 2 is 48°; the angle between the second chord 34 and the supporting straight section 2 is 70°; the angle between plane P and plane O is 176°.

[0077] The third chord 35 has an outer diameter of 299 mm, a wall thickness of 16 mm, and a length of 700 mm; the fourth chord 36 has an outer diameter of 402 mm, a wall thickness of 20 mm, and a length of 700 mm; the second web member 44 has an outer diameter of 273 mm, a wall thickness of 12 mm, and a length of 850 mm; the angle between the third chord 35 and the supporting straight section 2 is 106°; the angle between the second web member 44 and the supporting straight section 2 is 48°; the angle between the fourth chord 36 and the supporting straight section 2 is 70°; the angle between plane Q and plane R is 176°.

[0078] In this embodiment, all structural materials are made of Q355B, and manual arc welding uses E50 type welding rods; the welding material for electroslag welding with a melting nozzle is H08MnMoA, and the welding materials for automatic and semi-automatic submerged arc welding are H08A and H08E welding wires combined with high-manganese flux, which can well meet the design requirements.

[0079] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0080] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0081] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A tree-branch type steel structure connection node, characterized in that, Includes the inclined support section (1), the straight support section (2), the chord group (3), and the web member group (4); The end face of the inclined support section (1) is connected to one end face of the straight support section (2), and the central axis of the inclined support section (1) intersects the central axis of the straight support section (2), with the intersection point being A; The chord group (3) and the web group (4) are both connected to the support straight section (2) to form a tree branch shape with the support straight section (2); the central axes of the chord group (3), the web group (4) and the support straight section (2) intersect at the same point, and the intersection point is B and located above the intersection point A.

2. The tree-branch type steel structure connection node according to claim 1, characterized in that, The supporting inclined section (1) includes a connecting section (11), a middle section (12), and a tail section (13) connected in sequence, and the connecting section (11), the middle section (12), and the tail section (13) are coaxial; The end of the connecting segment (11) away from the middle segment (12) is connected to one end of the supporting straight segment (2), and the included angle between the connecting segment (11) and the supporting straight segment (2) is greater than 90 degrees; The end cross-section of the connecting segment (11) is larger than the end cross-section of the tail segment (13).

3. A tree-branch type steel structure connection node according to claim 2, characterized in that, The middle section (12) is frustum shaped, and the outer diameter of the middle section (12) connected to the connecting section (11) is greater than the outer diameter of the middle section (12) connected to the tail section (13).

4. A tree-branch type steel structure connection node according to claim 3, characterized in that, The slope of the outer wall of the middle section (12) is 1:6 to 1:

8.

5. A tree-branch type steel structure connection node according to claim 2, characterized in that, The string group (3) includes a first main string (31), a second main string (32), a first string (33), a second string (34), a third string (35), and a fourth string (36). The first main chord (31) and the second main chord (32) are respectively connected to both sides of the support straight section (2), and the angle between the first main chord (31) and the support straight section (2) is equal to the angle between the second main chord (32) and the support straight section (2); The first chord (33) and the fourth chord (36) are both connected to the side of the support straight section (2) where the first main chord (31) is located, and the second chord (34) and the third chord (35) are both connected to the side of the support straight section (2) where the second main chord (32) is located.

6. A tree-branch type steel structure connection node according to claim 5, characterized in that, The first chord (33) and the third chord (35) are both located on the side of the support straight section (2) near the connecting section (11), and the first main chord (31), the second main chord (32), the second chord (34), and the fourth chord (36) are all located above the first chord (33) and the third chord (35).

7. A tree-branch type steel structure connection node according to claim 5, characterized in that, The central axis of the first main chord (31), the central axis of the second main chord (32), the central axis of the first chord (33), the central axis of the second chord (34), the central axis of the third chord (35), and the central axis of the fourth chord (36) all intersect on the central axis of the support straight section (2), and the intersection point is A.

8. A tree-branch type steel structure connection node according to claim 7, characterized in that, The abdominal strut group (4) includes a first main abdominal strut (41), a second main abdominal strut (42), a first abdominal strut (43), and a second abdominal strut (44). The first main web member (41) and the first web member (43) are both connected to the side of the support straight section (2) where the first main chord member (31) is located. The second main web member (42) and the second web member (44) are both connected to the side of the support straight section (2) where the second main chord member (32) is located.

9. A tree-branch type steel structure connection node according to claim 8, characterized in that, The central axis of the first main web member (41), the central axis of the second main web member (42), the central axis of the first web member (43), and the central axis of the second web member (44) all intersect on the central axis of the support straight section (2), and the intersection point is A.

10. A tree-branch type steel structure connection node according to any one of claims 1-9, characterized in that, The connection between the inclined support section (1) and the straight support section (2) is provided with stiffening ribs (5).

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