Purlin connecting structure

Abstract

This invention relates to a purlin connection structure, comprising a support column, a shaped purlin, supports, and purlin brackets. The supports are located at both ends of the shaped purlins. Adjacent shaped purlins and supports are connected to each other via purlin brackets. The connection point of adjacent shaped purlins is located on the support column. The shaped purlin has a G-shaped cross-section. The shaped purlin of this invention is G-shaped, and the shaped purlin and support fit together. After welding, they form a rectangular closed cross-section at the connection point, giving the connection point better torsional stiffness and overall load-bearing capacity, and increasing the cross-sectional strength.

Description

Technical Field

[0001] This invention relates to the field of purlin connection technology, and in particular to a purlin connection structure. Background Technology

[0002] In steel structure buildings involving the installation of wall purlins, two main technical problems exist: First, according to design specifications, an installation gap must be reserved between the purlin bracket and the steel column. However, the actual processing and installation accuracy is difficult to guarantee, leading workers to often cut one side of the purlin flange on-site to force assembly. This not only severely weakens the support joint strength and creates safety hazards, but also results in wasted labor and low construction efficiency due to the large number of purlins that need to be cut. Second, before the tie rods are installed, the large-span purlins already in place must independently bear their own weight, and the direction of gravity is perpendicular to its weak axis, making them prone to mid-span sagging deformation. This deformation not only affects the subsequent tie rod installation and wall flatness, but in severe cases, it can also cause irreversible plastic deformation, permanently reducing the load-bearing capacity of the purlins.

[0003] Patent CN211898912U discloses a steel structure roof purlin and tie rod connection structure, including purlins, tie rods, and a steel frame beam for fixing the purlins. The purlins have a C-shaped structure, including an upper flange, a web, and a lower flange connected in sequence. Purlin supports are vertically installed on the steel frame beam. The purlin supports have a plate-like structure, and the web is fixedly connected to the plate surface of the purlin support. The tie rods are fixedly connected to the web. This patent changes the stress distribution of the purlins by setting purlin supports on the steel frame beam, but its cross-sectional shape is still a conventional C-shape. The cross-section of the purlins themselves and the connection nodes are not optimized, resulting in stress concentration problems at the supports. Furthermore, it is difficult to effectively control the amount of steel used while improving the load-bearing capacity.

[0004] Therefore, how to improve the overall stress performance of simply supported purlins and the connection strength of purlins at supports while balancing the amount of steel used is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects of the prior art and provide a purlin connection structure.

[0006] The objective of this invention can be achieved through the following technical solutions: According to one aspect of the present invention, a purlin connection structure is provided, comprising a support column, a shaped purlin, a support, and a purlin bracket. The support is disposed at both ends of the shaped purlin, adjacent shaped purlins and supports are connected to each other by the purlin bracket, the connection point of adjacent shaped purlins is located on the support column, and the cross-section of the shaped purlin is G-shaped.

[0007] As a preferred technical solution, the irregular purlin includes a first rib and a second rib, the first rib and the second rib are perpendicular to each other, and the lengths of the first rib and the second rib are equal.

[0008] As a preferred technical solution, the irregular purlin further includes a first wing plate and a second wing plate. The first wing plate is vertically disposed on the first rib and is parallel to and opposite to the second rib plate. The second wing plate is vertically disposed on the second rib and is parallel to and opposite to the first rib plate.

[0009] As a preferred technical solution, the irregular purlin further includes a first rolled edge and a second rolled edge. The first rolled edge is vertically disposed on the first wing plate and is parallel to and opposite to the first rib plate. The second rolled edge is vertically disposed on the second wing plate and is parallel to and opposite to the second rib plate. Both the first rolled edge and the second rolled edge are connected to the support.

[0010] As a preferred technical solution, the connections between the first rib and the second rib, the first wing plate and the first rib, the second wing plate and the second rib, the first rolled edge and the first wing plate, and the second rolled edge and the second wing plate are all L-shaped.

[0011] As a preferred technical solution, the support includes a third rib, a third wing, a third rolled edge, and a fourth rolled edge. The third rib and the third wing are perpendicular. The third rolled edge is perpendicularly disposed on the third rib and is parallel to and opposite to the third wing. The fourth rolled edge is perpendicularly disposed on the third wing and is parallel to and opposite to the third rib. Both the third rolled edge and the fourth rolled edge are connected to the irregular purlin. The connection points between the third rib and the third wing, the third rolled edge and the third rib, and the fourth rolled edge and the third wing are all L-shaped.

[0012] As a preferred technical solution, the purlin support plate includes a connecting plate and a reinforcing rib. The reinforcing rib is vertically disposed on the connecting plate. The connecting plate is connected to adjacent irregular purlins and supports respectively. The end faces of the reinforcing rib and the irregular purlin are parallel and aligned with the connection points of adjacent irregular purlins.

[0013] As a preferred technical solution, the reinforcing rib includes a wide end and a narrow end, the width of the reinforcing rib increasing sequentially from the narrow end to the wide end, and the wide end being close to the support column.

[0014] As a preferred technical solution, the structure further includes connectors and mounting holes, which are respectively provided on the purlin support plate, the irregular purlin, and the support. The purlin support plate is connected to the irregular purlin and the support respectively through the connectors and mounting holes.

[0015] As a preferred technical solution, the mid-span region of the irregular purlin is provided with stiffening ribs, which are arranged along the length direction of the irregular purlin and welded to the irregular purlin.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The irregular purlin of the present invention is G-shaped, and the irregular purlin and the support fit together. After welding, a rectangular closed section is formed at the connection, which makes the connection have better torsional stiffness and overall stress performance, and increases the section strength.

[0017] 2. This invention makes the two ribs in any irregular purlin equal in length, so that the centroid of the cross section tends to coincide with the shear center, which can further reduce the influence of eccentric force and enhance the cross section strength.

[0018] 3. This invention allows the width of the two flanges in any irregular purlin to be flexibly adjusted according to the direction of force, so as to achieve the desired enhancement of out-of-plane stiffness without significantly increasing the amount of steel used, in order to meet the stiffness requirements of different force directions. For example, when bearing a large transverse load on the wall, one flange can be lengthened to enhance the out-of-plane stiffness.

[0019] 4. The joint between the irregular purlin and the support of the present invention is formed by continuous welding along the periphery of the rectangular closed section to form a closed weld, which improves the force transmission path and stress uniformity of the joint, thereby improving the fatigue performance and durability of the joint. Attached Figure Description

[0020] Figure 1 This is a connection diagram of the present invention; Figure 2 This is a schematic diagram of the irregular purlin structure of the present invention; Figure 3 This is a schematic diagram of the support structure of the present invention; Figure 4 This is a schematic diagram of the purlin support plate structure of the present invention; 1. Irregular purlin; 2. Support; 3. Purlin bracket; 4. Support column; 5. Mounting hole; 11. First rib; 12. Second rib; 13. First flange; 14. Second flange; 15. First rolled edge; 16. Second rolled edge; 21. Third rib; 22. Third flange; 23. Third rolled edge; 24. Fourth rolled edge; 31. Connecting plate; 32. Reinforcing rib. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] Example 1 like Figure 1As shown, a purlin connection structure includes a support column 4, a shaped purlin 1, a support 2, and a purlin bracket 3. The support 2 is disposed at both ends of the shaped purlin 1. Adjacent shaped purlins 1 and supports 2 are connected to each other through the purlin bracket 3. The connection point of adjacent shaped purlins 1 is located on the support column 4. The cross-section of the shaped purlin 1 is G-shaped.

[0023] In this embodiment, the support column 4 is a support component in the installation environment, which can be a steel column or other form; a support 2 is provided at each end of the irregular purlin 1, and the support 2 is pre-welded to the ends of the cross-section reinforced purlin at the factory. There are multiple irregular purlins 1, and multiple irregular purlins 1 are connected together in sequence to form the final purlin. Adjacent irregular purlins 1 are connected together by purlin brackets 3. The purlin brackets 3 connect two adjacent irregular purlins 1 and two supports 2 on two adjacent irregular purlins 1 together, and at the same time fix the purlin brackets 3 to the support column 4, thus completing the support of the irregular purlins 1; in addition, additional holes can be drilled for fixing at the part of the irregular purlin 1 that contacts the support column 4.

[0024] The special-shaped purlin 1 is made of high-strength steel of Q420 or higher grade, which can significantly improve the load-bearing capacity under the same cross-sectional size, or achieve weight reduction through cross-sectional optimization of the special-shaped purlin 1.

[0025] like Figure 2 As shown, the irregular purlin 1 includes a first rib 11 and a second rib 12, the first rib 11 and the second rib 12 are perpendicular, and the lengths of the first rib 11 and the second rib 12 are equal.

[0026] The irregular purlin 1 also includes a first wing plate 13 and a second wing plate 14. The first wing plate 13 is vertically disposed on the first rib 11 and is parallel to and opposite to the second rib 12. The second wing plate 14 is vertically disposed on the second rib 12 and is parallel to and opposite to the first rib 11.

[0027] The irregular purlin 1 also includes a first rolled edge 15 and a second rolled edge 16. The first rolled edge 15 is vertically disposed on the first wing plate 13 and is parallel to and opposite to the first rib plate 11. The second rolled edge 16 is vertically disposed on the second wing plate 14 and is parallel to and opposite to the second rib plate 14. Both the first rolled edge 15 and the second rolled edge 16 are connected to the support 2.

[0028] The connections between the first rib 11 and the second rib 12, the first wing plate 13 and the first rib 11, the second wing plate 14 and the second rib 12, the first rolled edge 15 and the first wing plate 13, and the second rolled edge 16 and the second wing plate 14 are all L-shaped.

[0029] In this embodiment, the cross-section of the irregular purlin 1 is G-shaped, consisting of ribs, flanges, and rolled edges in sequence. The ribs are mainly the first rib 11 and the second rib 12. One end of the first rib 11 and one end of the second rib 12 are perpendicular to each other to form an L-shaped structure. Making the two ribs of equal length makes the centroid of the cross-section tend to coincide with the shear center, which can further reduce the influence of eccentric force and enhance the cross-sectional strength. The wing plates mainly consist of a first wing plate 13 and a second wing plate 14. One end of the first wing plate 13 and the second wing plate 14 are connected to the other end of the first rib plate 11 and the second rib plate 12, respectively, so that the first wing plate 13 is parallel and opposite to the second rib plate 12, and the second wing plate 14 is parallel and opposite to the first rib plate 11, forming an L-shaped structure. This allows the first wing plate 13 and the second wing plate 14 to extend into the L-shaped structure formed by the first rib plate 11 and the second rib plate 12. The widths of the two wing plates can be set to be unequal to adapt to the stiffness requirements in different force directions. For example, when bearing a large lateral load on the wall, one wing plate can be lengthened to enhance out-of-plane stiffness. The rolled edges include a first rolled edge 15 and a second rolled edge 16. One end of the first rolled edge 15 and the second rolled edge 16 are respectively connected to the other end of the first wing plate 13 and the second wing plate 14. The first rolled edge 15 is vertically disposed on the first wing plate 13 and is parallel to and opposite to the first rib plate 11. The second rolled edge 16 is vertically disposed on the second wing plate 14 and is parallel to and opposite to the second rib plate 14. The first rolled edge 15 and the second rolled edge 16 continue to extend into the L-shaped structure formed by the first rib plate 11 and the second rib plate 12. Through repeated vertical arrangements, a G-shaped structure is finally formed.

[0030] like Figure 3 As shown, the support 2 includes a third rib 21, a third wing 22, a third rolled edge 23, and a fourth rolled edge 24. The third rib 21 and the third wing 22 are perpendicular. The third rolled edge 23 is vertically arranged on the third rib 21 and is parallel to and opposite to the third wing 22. The fourth rolled edge 24 is vertically arranged on the third wing 22 and is parallel to and opposite to the third rib 21. Both the third rolled edge 23 and the fourth rolled edge 24 are connected to the irregular purlin 1.

[0031] The connections between the third rib 21 and the third wing 22, the third rolled edge 23 and the third rib 21, and the fourth rolled edge 24 and the third wing 22 are all L-shaped.

[0032] In this embodiment, the third rib 21 is connected to one end of the third wing 22 and is perpendicular to it, forming an L-shaped structure. The rolled edge also includes a third rolled edge 23 and a fourth rolled edge 24, one end of which is distributed and connected to the other end of the third rib 21 and the third wing 22; the third rolled edge 23 is vertically disposed on the third rib 21 and is parallel to and opposite to the third wing 22, and the fourth rolled edge 24 is vertically disposed on the third wing 22 and is parallel to and opposite to the third rib 21, ensuring that the support 2 has a U-shaped structure.

[0033] The first flange 13 and the third rib 21 are flush, the third rib 21 and the second rib 12 are parallel and opposite, and the third flange 22 and the first rib 11 are parallel and opposite. The purlin 1 and the support 2 are connected together by the third rolled edge 23 and the first rolled edge 11, and the fourth rolled edge 24 and the second rolled edge 12. A weld will be formed at the connection. Welding is continuously performed along the perimeter of the rectangular closed section to form a closed weld, so as to improve the fatigue performance and durability of the joint. After the two are welded, a rectangular closed section is formed at the connection, so that the support joint has better torsional stiffness and overall stress performance.

[0034] like Figure 4 As shown, the purlin support plate 3 includes a connecting plate 31 and a reinforcing rib 32. The reinforcing rib 32 is vertically arranged on the connecting plate 31. The connecting plate 31 is connected to the adjacent irregular purlin 1 and the support 2 respectively. The end faces of the reinforcing rib 32 and the irregular purlin 1 are parallel and aligned with the connection points of the adjacent irregular purlin 1.

[0035] The reinforcing rib 32 includes a wide end and a narrow end, and the width of the reinforcing rib 32 increases sequentially from the narrow end to the wide end, with the wide end being close to the support column 4.

[0036] In this embodiment, the purlin support plate 3 includes a connecting plate 31 and a reinforcing rib 32. The connecting plate 31 and the reinforcing rib 32 are perpendicular. Two adjacent supports 2 and the irregular purlin 1 together form a connecting surface, which is connected and fixed to the connecting plate 31 to form a whole. The reinforcing rib 32 is a straight plate with different widths, divided into a narrow end and a wide end according to its width. The width increases sequentially from the narrow end to the wide end. Specifically, only one side of the reinforcing rib 32 changes width sequentially, while the other side is connected to the connecting plate 31. The wide end side is close to the support column 4 and fixed to increase the structural length. A reinforcing rib 32 is provided in the middle below the connection of adjacent irregular purlins 1, and the end face of the reinforcing rib 32 is parallel to the end face of the irregular purlin 1 to improve the connection strength at the connection. Stiffening ribs can also be provided in the mid-span area of ​​the irregular purlin 1 to further improve the bending stiffness and local stability of the purlin during the installation stage and service.

[0037] The structure also includes connectors and mounting holes 5. The mounting holes 5 are provided on the purlin support plate 3, the irregular purlin 1, and the support 2. The purlin support plate 3 is connected to the irregular purlin 1 and the support 2 respectively through the connectors and mounting holes 5.

[0038] In this embodiment, the connecting component is specifically a bolt, and the mounting holes 5 are respectively provided on the purlin support plate 3, the irregular purlin 1 and the support 2. Specifically, there is at least one mounting hole 5 on the irregular purlin 1 and the support 2, and the number of mounting holes 5 on the purlin support plate 3 is the sum of the number of mounting holes 5 on two adjacent irregular purlins 1 and the support 2.

[0039] The mid-span region of the irregular purlin 1 is provided with stiffening ribs, which are arranged along the length direction of the irregular purlin 1 and welded to the irregular purlin 1.

[0040] In this embodiment, any irregular purlin 1 is connected to the beginning and end of an adjacent irregular purlin 1 through its two ends. The irregular purlin 1 is generally a long strip with a certain length. If it is only connected and fixed through the beginning and end, the middle part of the irregular purlin 1 will not have sufficient strength. The mid-span area is the area of ​​the irregular purlin 1 excluding the beginning and end. In order to increase the structural strength of this part, multiple stiffening ribs are set in the mid-span area, which are spaced along the length direction of the irregular purlin 1. The stiffening ribs are set perpendicular to the length direction of the irregular purlin 1 and are welded to the irregular purlin 1.

[0041] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A purlin connection structure, characterized in that, It includes a support column (4), a special-shaped purlin (1), a support (2) and a purlin bracket (3). The support (2) is set at both ends of the special-shaped purlin (1). Adjacent special-shaped purlins (1) and supports (2) are connected to each other through purlin brackets (3). The connection point of adjacent special-shaped purlins (1) is located on the support column (4). The cross-section of the special-shaped purlin (1) is G-shaped.

2. The purlin connection structure according to claim 1, characterized in that, The irregular purlin (1) includes a first rib (11) and a second rib (12), the first rib (11) and the second rib (12) are perpendicular, and the lengths of the first rib (11) and the second rib (12) are equal.

3. The purlin connection structure according to claim 2, characterized in that, The irregular purlin (1) also includes a first wing plate (13) and a second wing plate (14). The first wing plate (13) is vertically arranged on the first rib (11) and is parallel to and opposite to the second rib (12). The second wing plate (14) is vertically arranged on the second rib (12) and is parallel to and opposite to the first rib (11).

4. The purlin connection structure according to claim 3, characterized in that, The irregular purlin (1) also includes a first rolled edge (15) and a second rolled edge (16). The first rolled edge (15) is vertically arranged on the first wing plate (13) and is parallel to and opposite to the first rib plate (11). The second rolled edge (16) is vertically arranged on the second wing plate (14) and is parallel to and opposite to the second rib plate (14). Both the first rolled edge (15) and the second rolled edge (16) are connected to the support (2).

5. A purlin connection structure according to claim 4, characterized in that, The connections between the first rib (11) and the second rib (12), the first wing plate (13) and the first rib (11), the second wing plate (14) and the second rib (12), the first rolled edge (15) and the first wing plate (13), and the second rolled edge (16) and the second wing plate (14) are all L-shaped.

6. The purlin connection structure according to claim 1, characterized in that, The support (2) includes a third rib (21), a third wing (22), a third rolled edge (23), and a fourth rolled edge (24). The third rib (21) and the third wing (22) are perpendicular. The third rolled edge (23) is vertically arranged on the third rib (21) and is parallel and opposite to the third wing (22). The fourth rolled edge (24) is vertically arranged on the third wing (22) and is parallel and opposite to the third rib (21). Both the third rolled edge (23) and the fourth rolled edge (24) are connected to the shaped purlin (1). The connection points between the third rib (21) and the third wing (22), the third rolled edge (23) and the third rib (21), and the fourth rolled edge (24) and the third wing (22) are all L-shaped.

7. A purlin connection structure according to claim 1, characterized in that, The purlin support plate (3) includes a connecting plate (31) and a reinforcing rib (32). The reinforcing rib (32) is vertically arranged on the connecting plate (31). The connecting plate (31) is connected to the adjacent irregular purlin (1) and the support (2) respectively. The end faces of the reinforcing rib (32) and the irregular purlin (1) are parallel and aligned with the connection points of the adjacent irregular purlin (1).

8. A purlin connection structure according to claim 7, characterized in that, The reinforcing rib (32) includes a wide end and a narrow end, the width of the reinforcing rib (32) increases sequentially from the narrow end to the wide end, and the wide end is close to the support column (4).

9. A purlin connection structure according to claim 1, characterized in that, The structure also includes connectors and mounting holes (5), which are respectively provided on the purlin support plate (3), the shaped purlin (1) and the support (2). The purlin support plate (3) is connected to the shaped purlin (1) and the support (2) respectively through the connectors and mounting holes (5).

10. A purlin connection structure according to claim 1, characterized in that, The purlin (1) is provided with stiffening ribs in the mid-span area. The stiffening ribs are arranged along the length direction of the purlin (1) and welded to the purlin (1).

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