A single-layer lattice shell structure node suitable for C-section cold-formed thin-walled steel

Abstract

The present invention discloses a single-layer lattice shell structure node suitable for cold-bent thin-walled steel sections with C-sections, belonging to the field of steel structure engineering technology. The single-layer lattice shell structure node includes a connecting node and a C-shaped steel composite component connected to the outside of the connecting node. The connecting node is composed of a central hub body and a connecting piece connected together. The central hub body is a hollow prism structure, and a connecting piece is connected to the outer wall of each prism face. The connecting piece is composed of an upper flange plate and a lower flange plate connected vertically by a web, wherein the web includes a middle web and two side webs, and the two side webs are connected to the two side faces of the middle web in an open shape in the horizontal direction. The C-shaped steel composite component is composed of three C-shaped components connected in a triangular shape, and the C-shaped component is connected to the two side webs on the connecting piece. The present invention changes the force transmission path of the lattice shell structure through the design of the connecting piece and the C-shaped steel composite component, thereby enhancing the overall performance of the lattice shell structure.

Description

Technical Field

[0001] This invention relates to an assembled hub joint for steel structures, specifically a single-layer reticulated shell structure joint suitable for C-section cold-formed thin-walled steel, belonging to the field of steel structure engineering technology. Background Technology

[0002] With my country's recent focus on promoting the development of prefabricated structures, various structural forms are seeking to utilize prefabricated components to meet the demands for assembly and disassembly. Compared to traditional welded joints, prefabricated joints are more conducive to ensuring project quality, shortening construction time, saving resources, and reducing pollution.

[0003] Currently, existing prefabricated node structures suffer from complex structural forms and poor stress stability. For example, Chinese patent application CN105178443A, entitled "A Bolted Connection Node Applicable to a Single-Layer Rectangular Steel Pipe Reticulated Shell," discloses a node structure that facilitates the connection of members in a single-layer rectangular steel pipe reticulated shell. However, the existing force transmission path is singular, and the unbalanced force distribution at the node often leads to instability of the members, ultimately causing the reticulated shell structure to fail.

[0004] Therefore, there is an urgent need to design a single-layer reticulated shell structure node with good stress stability and node stiffness. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art and provide a single-layer reticulated shell structure node suitable for C-shaped cross-section cold-formed thin-walled steel. Through the design of the connectors, the node connection can be achieved with only two bolt connections, which is simple and simplifies the installation steps. Furthermore, through the design of C-shaped steel composite components, two C-shaped components with included angles are set at a connection point, which changes the force transmission path of the reticulated shell structure, enhances the overall performance of the reticulated shell structure, and ensures the node stiffness and load-bearing capacity of the reticulated shell structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a single-layer reticulated shell structure node suitable for C-shaped cross-section cold-formed thin-walled steel, wherein the single-layer reticulated shell structure node includes a connecting node and a C-shaped steel composite component connected to the outside of the connecting node, wherein the connecting node is composed of a central hub and a connector connected together, the central hub is a hollow prism structure, and a connector is fixedly connected to the outer wall of each face of the central hub by a web bolt;

[0007] The connector is composed of an upper flange plate and a lower flange plate vertically connected by a web plate. The web plate includes a central web plate and two side web plates. The central web plate is flush with one side of the upper flange plate and the lower flange plate. The two side web plates are open in the horizontal direction and connected to the two sides of the central web plate. The included angle between the two side web plates in the horizontal direction is 60°~72°. The arching angle between the connector and the central hub is 0~20°.

[0008] The C-shaped steel composite member is composed of three C-shaped members connected in a triangle, and the rolled edges of the C-shaped members are set in the direction of the inside of the triangle; the C-shaped members are connected to the two side webs of the connector by flange bolts, and the webs of the C-shaped members are fitted and connected to the inner surfaces of the side webs.

[0009] Both the upper and lower ends of the central hub are provided with central hub opening cover plates with centrally opened circular holes. Each edge of the central hub is also provided with central hub bolt holes along the vertical direction. The central web of the connector is provided with web bolt holes corresponding to the central hub bolt holes. The central hub and the connector are fixedly connected together by web bolts that pass through the central hub bolt holes and web bolt holes.

[0010] The central hub is also horizontally connected to a central partition, which divides the internal cavity of the central hub into upper and lower parts.

[0011] The upper and lower flange plates of the connector are provided with flange bolt holes distributed in a triangular pattern, with the apex of the triangle on the inner side; the ends of the two C-shaped components are set without rolled edges, and the webs of the two C-shaped components are attached to the inner side surfaces of the side webs, and the connection is stacked and fixed in the connector by flange bolts passing through the flange bolt holes.

[0012] The width of each facet in the central hub matches the width of the central web in the connector.

[0013] The flange bolts and web bolts are all fully threaded high-strength bolts, and their model is GB / 5783 8.8 grade hexagonal head high-strength bolt.

[0014] The C-shaped component is a cold-formed thin-walled steel section with a C-shaped cross-section.

[0015] The beneficial effects of the present invention are:

[0016] 1) The design of the connectors in this invention allows the node connection to be achieved with only two bolt connections, which is simple and simplifies the installation process. By incorporating cold-formed thin-walled C-shaped steel into a single-layer reticulated shell structure and designing C-shaped steel composite components, two C-shaped components with included angles are set at a connection point, which changes the force transmission path of the reticulated shell structure. When the node is subjected to axial force or bending moment, the axial force is transferred from the bolt on one side of the central hub to the C-shaped component or from the connector on this side to the central hub to the compression, and then to the next two nodes. This improves the stability of the reticulated shell structure connection and the node stiffness, and enhances the overall performance of the reticulated shell structure.

[0017] 2) All the node structures of this invention are made of cold-formed thin-walled steel, which is lightweight, highly industrialized, and has a variety of cross-sectional forms. The cross-sectional form and size can be selected according to the needs of the reticulated shell structure, which is convenient for structural design and analysis. The nodes are bolted together, and the overall bending stiffness is high. The load-bearing capacity of the nodes themselves has been reinforced by internal stiffening and other methods. Moreover, due to its lightweight and simple assembly, it improves the installation efficiency of the reticulated shell structure at high altitudes, reduces installation and structural costs, reduces construction costs, and is conducive to engineering promotion and application. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the single-layer reticulated shell node of the present invention;

[0019] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at the center of the node connection;

[0020] Figure 3 for Figure 2 Top view plan;

[0021] Figure 4 for Figure 2 A three-dimensional structural diagram viewed from the front;

[0022] Figure 5 for Figure 1 Three-dimensional structural diagram of the central hub body;

[0023] Figure 6 for Figure 1 Half-section structural diagram of the central hub body;

[0024] Figure 7 for Figure 1 3D structural diagram of the connecting component;

[0025] Figure 8 for Figure 2 Assembly structure diagram at the mid-node connection;

[0026] Figure 9 for Figure 8A plan view of the connection point of one of the connectors;

[0027] Figure 10 for Figure 2 Schematic diagram of the cross-sectional structure of C-shaped component 4;

[0028] Figure 11 This is a diagram of the single-layer reticulated shell structure after multi-node construction of the present invention.

[0029] In the figure, 1-center hub, 101-center hub opening cover plate, 102-center hub bolt hole, 103-central partition, 2-connector, 201-central web, 202-side web, 203-web bolt hole, 204-flange bolt hole, 3-flange bolt, 4-C-shaped component, 5-web bolt. Detailed Implementation

[0030] The present invention will be further explained and described below with reference to the accompanying drawings and specific embodiments.

[0031] Example: Figures 1 to 4 As shown, the present invention provides a single-layer reticulated shell structure node suitable for C-shaped cross-section cold-formed thin-walled steel. The single-layer reticulated shell structure node includes a connecting node and a C-shaped steel composite component connected to the outside of the connecting node. The connecting node is composed of a central hub 1 and a connecting piece 2 connected together. The central hub 1 is a hollow prism structure. A connecting piece 2 is fixedly connected to the outer wall of each face of the central hub 1 by a web bolt 5.

[0032] like Figure 5 As shown, the central hub 1 is made of steel through folding and welding. Both the upper and lower ends of the central hub 1 are welded with central hub opening cover plates 101 with a central circular hole. Each edge of the central hub 1 also has two central hub bolt holes 102 vertically opened. If the cross-sectional area is large, the number of bolt holes needs to be increased. Under the condition of meeting the bolt spacing and edge distance, the number of row and column bolts is increased. The upper and lower cover plates reserve installation space for bolt connection by cutting holes.

[0033] like Figure 6 As shown, a central partition 103 is horizontally connected to the middle of the central hub 1, which divides the internal cavity of the central hub 1 into upper and lower parts.

[0034] like Figure 7As shown, the connector 2 is composed of an upper flange plate and a lower flange plate vertically welded together through a web. The web includes a central web 201 and two side webs 202. The width of each facet in the central hub 1 matches the width of the central web 201 in the connector 2. The central web 201 is flush with one side of the upper flange plate and the lower flange plate. The two side webs 202 are open in the horizontal direction and connected to the two sides of the central web 201. The included angle between the two side webs 202 in the horizontal direction is 60°~72°, and the specific included angle value is determined by the mesh division density of the shell structure. The rod is always perpendicular to the side panel of the hub. The side panel of the hub itself has an angle. The camber angle between the connector 2 and the central hub 1 is 0~20°.

[0035] The middle web plate 201 of the connector 2 is provided with a web bolt hole 203 corresponding to the central hub bolt hole 102. The central hub 1 and the connector 2 are fixedly connected together by a web bolt 5 through the central hub bolt hole 102 and the web bolt hole 203.

[0036] The upper and lower flange plates of the connector 2 are provided with flange bolt holes 204 distributed in a triangular pattern, with the apex of the triangle on the inside.

[0037] like Figure 1 and Figure 10 As shown, the C-shaped steel composite component is composed of three C-shaped components 4 connected in a triangular shape. The C-shaped component 4 is a cold-formed thin-walled steel with a C-shaped cross section, and the rolled edge of the C-shaped component 4 is installed in the direction of the inner side of the triangle. The C-shaped component 4 is connected to the two side webs 202 on the connector 2 by flange bolts 3, and the web of the C-shaped component 4 is in close contact with the inner side of the side webs 202.

[0038] The ends of the two C-shaped components 4 are rolled off, and the length removed is consistent with the fact that the three C-shaped components 4 can be combined to form a triangle. The webs of the two C-shaped components 4 are attached to the inner side of the side webs 202, and the connection is stacked and fixed in the connector 2 by the flange bolts 3 passing through the flange bolt holes 204.

[0039] Both flange bolt 3 and web bolt 5 are fully threaded high-strength bolts, and their model is GB / 5783 8.8 grade hexagonal head high-strength bolt.

[0040] like Figure 8 and Figure 9 As shown, the assembly and connection process is as follows:

[0041] The rolled edges of the two C-shaped components 4 are punched inward, stacked in a triangle, and then placed into the cavity of the connector 2 and connected together through the flange bolt holes 3.

[0042] Then connect the connector 2 to the center hub 1 using the web bolts 5.

[0043] like Figure 11 The diagram shows a short-range linear single-layer reticulated shell structure with a span of 50m and a height of 25m, formed using the combined members in the reticulated shell structure nodes of this invention. The hollow positions are the locations reserved for the nodes, indicating that each node in this reticulated shell structure can connect 5-6 combined members, with each member connecting 3 nodes.

[0044] In this invention, the design of the connectors allows the node connection to be achieved with only two bolt connections, simplifying the connection method and installation steps. Furthermore, the design of the C-shaped steel composite components, which sets two C-shaped components with included angles at a connection point, changes the force transmission path of the grid shell structure, enhances the overall performance of the grid shell structure, and ensures the node stiffness and load-bearing capacity of the grid shell structure.

[0045] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A single-layer reticulated shell structure node suitable for C-section cold-formed thin-walled steel, characterized in that: The single-layer reticulated shell structure node includes a connecting node and a C-shaped steel composite component connected to the outside of the connecting node. The connecting node is composed of a central hub (1) and a connector (2) connected together. The central hub (1) is a hollow prism structure. A connector (2) is fixedly connected to the outer wall of each face of the central hub (1) by a web bolt (5). The connector (2) is composed of an upper flange plate and a lower flange plate connected vertically through a web plate. The web plate includes a central web plate (201) and two side web plates (202). The central web plate (201) is flush with one side of the upper flange plate and the lower flange plate. The two side web plates (202) are connected to the two sides of the central web plate (201) in an open shape in the horizontal direction. The angle between the two side web plates (202) in the horizontal direction is 60°~72°. The arching angle between the connector (2) and the central hub (1) is 0~20°. The C-shaped steel composite component is composed of three C-shaped components (4) connected in a triangle, and the rolled edge of the C-shaped component (4) is set in the direction of the inside of the triangle; the C-shaped component (4) is connected to the two side webs (202) on the connector (2) by flange bolts (3), and the web of the C-shaped component (4) is in close contact with the inner side of the side webs (202).

2. The single-layer reticulated shell structure node according to claim 1, characterized in that: The central hub (1) is provided with a central hub opening cover plate (101) with a central opening at both the upper and lower ends. The central hub (1) is also provided with a central hub bolt hole (102) along the vertical direction on each edge of the central hub (1). The central web plate (201) of the connector (2) is provided with a web bolt hole (203) corresponding to the central hub bolt hole (102). The central hub (1) and the connector (2) are fixedly connected together by a web bolt (5) through the central hub bolt hole (102) and the web bolt hole (203).

3. The single-layer reticulated shell structure node according to claim 2, characterized in that: The central hub (1) is also horizontally connected to a central partition (103), which divides the internal cavity of the central hub (1) into upper and lower parts.

4. The single-layer reticulated shell structure node according to claim 1, characterized in that: The upper and lower flange plates of the connector (2) are respectively provided with flange bolt holes (204) distributed in a triangular pattern, wherein the apex of the triangle is on the inside; the ends of the two C-shaped members (4) are set without rolled edges, and the web of the two C-shaped members (4) is attached to the inner side of the side web plate (202), the connection is stacked, and the flange bolts (3) pass through the flange bolt holes (204) and are fixed in the connector (2).

5. The single-layer reticulated shell structure node according to claim 1, characterized in that: The width of each facet in the central hub (1) matches the width of the central web (201) in the connector (2).

6. The single-layer reticulated shell structure node according to claim 1, characterized in that: The flange bolts (3) and web bolts (5) are all full-thread high-strength bolts, and their model is GB / 5783 8.8 grade hexagonal head high-strength bolt.

7. The single-layer reticulated shell structure node according to claim 1, characterized in that: The C-shaped component (4) is a cold-formed thin-walled steel section with a C-shaped cross section.

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