A net rack cable combination structure and construction method

Abstract

This invention discloses a cable-stayed roof structure and its construction method. The cable-stayed roof structure includes a roof frame, steel beams, a top beam structure, and flying columns. The steel beams and the top beam structure are fixedly connected. The flying columns are fixed to the bottom of the top beam structure and are inclined downwards. The bottom ends of the flying columns are distributed on the same circumference, so that the axes of the flying columns are distributed on the surface of a frustum. Steel cables are fixedly connected between adjacent steel beams and between steel beams and ball joints. A circumferential cable is provided between the bottom ends of adjacent flying columns, and a radial cable is provided between the bottom end of the flying column and the ball joint below it. The roof structure of this invention has good rigidity, meeting the required load-bearing capacity. It also enables large-span spatial structures, achieving a harmonious balance between unique design and structural stability, and solves the technical problem of complex and diverse intersecting nodes caused by radial cables of different lengths and angles, as well as circumferential cables of different angles.

Description

Technical Field

[0001] This invention belongs to the field of building structure technology, specifically relating to a space frame cable-stayed composite structure and its construction method. Background Technology

[0002] With the continuous development of steel structure construction in my country, the requirements for various types of spatial steel structures in terms of span and space are also constantly increasing. Cable-stayed prestressed structures are widely used in the roof structures of large buildings such as stadiums, convention centers, and speed skating rinks due to their advantages such as light weight, large span, large coverage area, low material consumption, and short construction period.

[0003] As a novel structural form, tensioned structures offer several advantages over traditional stadium roof structures: novel design and unique structure, fully utilizing the tensile strength of cables, the compressive strength of compression members, and the compressive bearing capacity of ring beams; resulting in a lighter, more streamlined, and dynamic architectural effect; reduced self-weight, ease of transportation, industrial manufacturing and assembly; lower material consumption; and greater sustainability. Due to these advantages, they have been frequently used in sports architecture projects in recent years.

[0004] The prior art discloses an invention patent entitled "A Large-Span Upper-Level Connected Square Inner Ring Saddle-Shaped Double-Layer Cable-Stick Tensioning Structure" (application number: 201810980913.2), which develops a large-span upper-level connected square inner ring saddle-shaped double-layer cable-stick tensioning structure with high overall stiffness, high torsional stiffness and good load-bearing capacity.

[0005] For example, the prior art discloses an invention patent entitled a construction method for overall lifting and phased anchoring of a single-layer cable net with spoke-type structure (application number: 201710151235.4), which can reduce the amount of construction support and high-altitude operations, reduce the demand for large-tonnage lifting systems, reduce installation costs, achieve lightweight tooling, shorten the construction period and improve construction efficiency.

[0006] However, the existing technology uses radial cables of different lengths and angles, as well as annular cables of different angles, which leads to complex and diverse intersecting nodes. At the same time, the number of radial and annular cables that need to be tensioned is large, which affects the construction cycle, and the roof structure is not designed. Summary of the Invention

[0007] The purpose of this invention is to solve the aforementioned technical problems existing in the prior art, and to provide a space frame cable-stayed composite structure and construction method. A roof structure is provided, comprising a space frame structure, steel beams, and a top beam structure, all of which are steel structures, giving the roof structure good rigidity and meeting the required load-bearing capacity. Furthermore, the use of flying columns, circumferential cables, and radial cables ensures the top beam structure is stress-balanced, enabling a large-span spatial structure. Circularly distributed flying columns are installed at the bottom of the top beam structure, and circumferential and radial cables are arranged between the flying columns and between the flying columns and the space frame structure. This combination of a circular space frame and cables achieves a unique design and a coordinated and unified structural stability, solving the technical problem of complex and diverse intersection nodes caused by radial cables of different lengths and angles, as well as circumferential cables of different angles. The number of circumferential and radial cables is relatively small, and the tensioning construction period for the circumferential and radial cables is short.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] A cable-stayed space frame structure is characterized by comprising a space frame structure, steel beams, a top beam structure, and flying columns. The space frame structure is a ring-shaped structure with members and ball joints welded and fixed, forming an installation opening in the middle area of ​​the space frame structure. The steel beams are welded and fixed to the ball joints located above. The top beam structure is located at the center of the installation opening, and the steel beams are fixedly connected to the top beam structure. The flying columns are fixed to the bottom of the top beam structure, with the flying columns inclined downwards and their bottom ends distributed on the same circumference, so that the axes of the flying columns are distributed on the surface of a frustum. Steel cables are fixedly connected between adjacent steel beams and between steel beams and ball joints; a circumferential cable is provided between the bottom ends of adjacent flying columns, and a radial cable is provided between the bottom end of the flying column and the ball joint located below. A roof structure is provided, which includes the space frame structure, steel beams, and top beam structure, all of which are steel structures, giving the roof structure good rigidity and meeting the required load-bearing capacity. Furthermore, by setting up flying columns, circumferential cables, and radial cables, the top beam structure is made stress-balanced, enabling a large-span spatial structure. At the same time, flying columns are set up in a ring at the bottom of the top beam structure, and circumferential and radial cables are arranged between flying columns and between flying columns and the space frame structure. Through this combination of ring space frame and cables, a unique design shape and structural stress stability are achieved in a coordinated and unified manner. This solves the technical problem of complex and diverse intersection nodes caused by radial cables of different lengths and angles and ring cables of different angles. The number of circumferential and radial cables is small, and the tensioning construction period of circumferential and radial cables is short.

[0010] Furthermore, the top beam structure includes a central column, a connecting plate one, and a connecting plate two. Connecting plate one is horizontally welded to the outer surface of the vertical central column. The connecting plate one located below is used to connect the flying column. Connecting plate two is vertically welded between two adjacent connecting plates one. At the same time, connecting plate two is welded to the central column. Connecting plate two is used to connect the steel beams, so that the flying column and the steel beam are both concentrated on the top beam structure, which facilitates the transmission of force.

[0011] Furthermore, three connecting plates are set up, so that the connecting plates are distributed in layers. The steel beams are divided into two layers. A single steel beam in the lower layer is set in the area between two adjacent steel beams in the upper layer. The steel beams in the upper layer are fixed to the connecting plate above, and the steel beams in the lower layer are fixed to the connecting plate below. This allows the steel beams to be divided into two layers, saving installation space. It allows 24 steel beams to be set in a circle on the central column. The distance between two adjacent steel beams is small, which facilitates the installation of steel cables. This results in better roof structure rigidity and strong load-bearing capacity.

[0012] Furthermore, a connecting plate three is welded to the end of the web of the steel beam, and an ear plate one is welded between connecting plate three and connecting plate two, thus achieving a firm connection between the steel beam and the top beam structure. A connecting plate four is welded to the other end of the web of the steel beam, and a connecting plate five is welded to the ball joint above. An ear plate two is welded between connecting plate four and connecting plate five, thus achieving a firm connection between the steel beam and the space frame structure.

[0013] Furthermore, for longer steel beams, installing parallel steel cables between the beams results in a large number of cables. To address this technical issue, steel plates are welded equidistantly to both sides of the web of the steel beam. Steel cables are installed between steel plates at the same location on adjacent steel beams, and also between the front and rear steel plates of adjacent steel beams. A second steel plate is welded to the upper spherical joint, and a steel cable is installed between the outermost steel plates and the second steel plate. This creates a V-shaped distribution of cables between adjacent steel beams. Only six cables are needed between two steel beams to ensure the entire beam bears the load. For steel beams of a given length, this reduces the number of cables required and ensures stable connections between the beams.

[0014] Furthermore, two ear plates are welded to the bottom of the flying column. The two ear plates are symmetrically arranged about the axis of the flying column. The circumferential cable is fixed between the ear plates of two adjacent flying columns, realizing a firm connection between the circumferential cable and the flying column.

[0015] Furthermore, 12 flying poles are used to connect 12 circumferential cables. One or two ear plates (four) are welded to the bottom of each flying pole, and a single ear plate (five) is welded to the ball joint below. Radial cables are installed on the single ear plate (five) and the ear plate (four) of a single flying pole; or radial cables are installed on the single ear plate (five) and the ear plates (four) of three flying poles, resulting in 20 radial cables. At the intersection of the cables and flying poles, when only one radial cable, two circumferential cables, and the flying pole intersect, the radial cables are approximately perpendicular to the right-hand circumferential cable. When two radial cables, a circumferential cable, and the flying pole are connected, the two radial cables are distributed on different sides, with an angle of approximately 50°. This solves the technical problem of complex and diverse intersection nodes caused by radial cables of different lengths and angles, as well as circumferential cables of different angles.

[0016] A construction method for a cable-stayed space frame structure, characterized by the following steps:

[0017] Step 1: Select the radial cable tensioning method according to the construction drawings to establish the required prestress in the space frame cable assembly structure.

[0018] Step 2: Installation of the space frame cable assembly structure:

[0019] (1) Erect temporary support frame one and temporary support frame two.

[0020] (2) The space frame structure splicing units are welded together with rods and ball joints. The space frame structure splicing units are hoisted in sections and fixed on temporary support frame 1. The remaining rods are then connected to complete the installation of the space frame structure.

[0021] (3) Install the rods between temporary support frame one and temporary support frame two.

[0022] (4) Fix the top beam structure on the temporary support frame 2, then install steel beams between the top beam structure and the space frame structure, then fix steel cables between two adjacent steel beams, and fix steel cables between the steel beams and the ball joints, and then install flying columns at the bottom of the top beam structure.

[0023] (5) A radial cable is installed between the bottom of the flying column and the ball node below it, and a circumferential cable is installed between the bottom of two adjacent flying columns. The radial cable and the circumferential cable are tightened by cable tensioning fixtures. The tightening process is carried out on the auxiliary measures of the erection.

[0024] Step 3: After the radial and circumferential cables are tensioned, remove temporary support frame one and temporary support frame two.

[0025] Furthermore, the radial and circumferential cables are numbered and marked in the factory. After the flying column construction is completed, the installation deviation between the nodes used to install the radial and circumferential cables is measured. Based on the markings and installation deviations, the cable lengths of the radial and circumferential cables are adjusted, and the radial and circumferential cables are installed.

[0026] Furthermore, the tensioning of the radial cables includes the following steps:

[0027] 1) Label the 20 radial cables as follows: LS-2-1, LS-2-2, LS-2-3, LS-2-4, LS-2-5, LS-2-6, LS-2-7, LS-2-8, LS-2-9, LS-2-10, LS-2-11, LS-2-12, LS-3-1, LS-3-2, LS-3-3, LS-3-4, LS-4-1, LS-4-2, LS-4-3, LS-4-4.

[0028] 2) First, pre-tighten the 20 radial cables, then tension them in five batches sequentially:

[0029] First batch: LS-3-1, LS-4-1, LS-3-3, LS-4-3;

[0030] The second batch includes: LS-3-2, LS-4-2, LS-3-4, and LS-4-4.

[0031] The third batch: LS-2-3, LS-2-6, LS-2-9, LS-2-12;

[0032] Fourth batch: LS-2-2, LS-2-5, LS-2-8, LS-2-11;

[0033] The fifth batch includes: LS-2-1, LS-2-4, LS-2-7, and LS-2-10.

[0034] The present invention, by adopting the above-described technical solution, has the following beneficial effects:

[0035] (1) The present invention provides a roof structure, which includes a space frame structure, steel beams, and a top beam structure, all of which are steel structures, giving the roof structure good rigidity and meeting the required load-bearing capacity. By setting up flying columns, circumferential cables, and radial cables, the top beam structure is balanced under stress, enabling a large-span spatial structure. At the same time, flying columns are set in a ring at the bottom of the top beam structure, and circumferential and radial cables are arranged between the flying columns and between the flying columns and the space frame structure. Through this combination of ring space frame and cables, a unique design shape and structural stability are achieved, solving the technical problem of complex and diverse intersection nodes caused by radial cables of different lengths and angles and ring cables of different angles. The number of circumferential and radial cables is small, and the tensioning construction period of the circumferential and radial cables is short.

[0036] (2) In terms of construction methods, it can meet the requirements for installation and tensioning of radial cables of different lengths and angles, and improve the quality of subsequent cable tensioning construction. At the same time, during the radial cable tensioning process, auxiliary methods such as setting up a safe construction platform are adopted to improve the safety of cable tensioning construction.

[0037] (3) On the basis of meeting the required prestress in the structure, construction should be convenient, the node construction should be simple and beautiful, and the cable alignment and internal forces should be easy to control, so as to ensure the effective establishment of prestress in the composite structure and realize the unique architectural design. Attached Figure Description

[0038] The present invention will be further described below with reference to the accompanying drawings:

[0039] Figure 1 This is a schematic diagram of a cable-stayed structure according to the present invention;

[0040] Figure 2 for Figure 1 Top view;

[0041] Figure 3 This is a diagram showing the radial cable tension distribution in this invention;

[0042] Figure 4 This is a schematic diagram of the connection between the steel beam and the top beam structure in this invention;

[0043] Figure 5 for Figure 4 Enlarged structural diagram at point A;

[0044] Figure 6 This is a schematic diagram of the top beam structure in this invention;

[0045] Figure 7 This is a schematic diagram of the connection between the steel beam and the steel cable in this invention;

[0046] Figure 8 This is a schematic diagram of the steel beam structure in this invention;

[0047] Figure 9 This is a schematic diagram of a connection method 1 between the flying column, the circumferential cable, and the radial cable in this invention;

[0048] Figure 10 for Figure 9 Enlarged structural diagram at point B;

[0049] Figure 11 This is a schematic diagram of the second connection method between the flying column, the circumferential cable, and the radial cable in this invention;

[0050] Figure 12 for Figure 11 Enlarged structural diagram at point C;

[0051] Figure 13 This is a schematic diagram of the overall distribution of the flying column, circumferential cable, and radial cable in this invention;

[0052] Figure 14 for Figure 13 Enlarged structural diagram at point D;

[0053] Figure 15 This is a distribution diagram of the steel cables in this invention.

[0054] In the diagram, 1-space frame structure; 2-ball joint; 3-member; 4-top beam structure; 5-steel beam; 6-steel cable; 7-flying column; 8-circumferential cable; 9-radial cable; 10-central column; 11-connecting plate one; 12-connecting plate two; 13-pad plate; 14-ear plate seven; 15-connecting plate five; 16-web plate; 17-connecting plate four; 18-connecting plate three; 19-steel plate two; 20-ear plate two; 21-steel plate one; 22-ear plate one; 23-ear plate three; 24-ear plate four; 25-flat steel plate; 26-ear plate six. Detailed Implementation

[0055] like Figures 1 to 15 As shown, this invention provides a cable-stayed structure comprising a space frame structure 1, a steel beam 5, a top beam structure 4, and a flying column 7.

[0056] The space frame structure 1 adopts a three-layer ring structure with members 3 and ball nodes 2 welded and fixed, so that the middle area of ​​the space frame structure 1 forms an installation opening, and the steel beam 5 is welded and fixed to the ball node 2 located above.

[0057] The top beam structure 4 is located at the center of the installation opening. The top beam structure 4 includes a central column 10, a connecting plate 11, and a connecting plate 12. The connecting plate 11 is horizontally welded to the outer surface of the vertical central column 10. The lower connecting plate 11 is used to connect the flying column 7. The connecting plate 12 is vertically welded between two adjacent connecting plates 11. At the same time, the connecting plate 12 is welded to the central column 10. The connecting plate 12 is used to connect the steel beam 5, so that the flying column 7 and the steel beam 5 are both concentrated on the top beam structure 4, which facilitates the transmission of force.

[0058] Three connecting plates 11 are set, so that connecting plates 12 are distributed in layers. The steel beams 5 are divided into two layers. A single steel beam 5 in the lower layer is set in the area between two adjacent steel beams 5 in the upper layer. The steel beams 5 in the upper layer are fixed to the connecting plate 11 above, and the steel beams 5 in the lower layer are fixed to the connecting plate 11 below. This allows the steel beams 5 to be divided into two layers, saving installation space. This allows 24 steel beams 5 to be set in a circle on the central column 10. The distance between two adjacent steel beams 5 is small, which facilitates the installation of steel cables. This results in good roof structure rigidity and strong load-bearing capacity.

[0059] A connecting plate 3 18 is welded to one end of the web 16 of steel beam 5. A lug plate 1 22 is welded between connecting plate 3 18 and connecting plate 2 12. A pad 13 can be placed between lug plate 1 22 and connecting plate 2 12 to achieve a firm connection between steel beam 5 and top beam structure 4. A connecting plate 4 17 is welded to the other end of the web 16 of steel beam 5. A connecting plate 5 15 is welded to the ball node 2 above. A lug plate 20 is welded between connecting plate 4 17 and connecting plate 5 15 to achieve a firm connection between steel beam 5 and space frame structure 1.

[0060] For longer steel beams 5, installing parallel steel cables between them would result in a large number of cables. To address this issue, steel plates 21 are welded equidistantly to both sides of the web 16 of the steel beam 5. Steel cables 6 are installed between the steel plates 21 at the same location on two adjacent steel beams 5, and also between the front and rear steel plates 21 on two adjacent steel beams 5. A steel plate 19 is welded to the upper ball joint 2. Steel cables 6 are installed between the outermost steel plates 21 and 19 on the steel beam 5, resulting in a V-shaped distribution of steel cables 6 between adjacent steel beams 5. Only 6 cables are needed between two steel beams 5 to ensure the entire steel beam 5 is under stress. This reduces the number of cables 6 required for steel beams of a given length and ensures stable connections between the steel beams 5.

[0061] A flat steel plate 25 is welded to the top of the flying column 7, and an ear plate 26 is welded to the flat steel plate 25. An ear plate 14 is welded to the connecting plate 11 below. The ear plates 26 and 14 are fixedly connected, possibly by a pin connection. The flying column 7 is inclined downwards, and its bottom ends are distributed on the same circumference, so that the axis of the flying column 7 is distributed on the surface of the frustum. Steel cables 6 are fixedly connected between adjacent steel beams 5 and between steel beams 5 and ball joints 2.

[0062] A circumferential cable 8 is provided between the bottom ends of two adjacent flying columns 7. Specifically, two ear plates 23 are welded to the bottom end of the flying column 7. The two ear plates 23 are symmetrically arranged about the axis of the flying column 7. The circumferential cable 8 is fixed between the ear plates 23 of the two adjacent flying columns 7, realizing a firm connection between the circumferential cable 8 and the flying column 7.

[0063] A radial cable 9 is provided between the bottom end of the flying column 7 and the ball joint 2 below it. The specific design of the radial cable 9 is as follows: Figure 13 As shown: 12 flying posts 7 are connected to 12 circumferential cables 8. One or two ear plates 24 are welded to the bottom of each flying post 7, and a single ear plate 5 is welded to the ball joint 2 below. Radial cables 9 are set on the single ear plate 5 and the ear plate 24 of each flying post 7; or radial cables 9 are set on the single ear plate 5 and the ear plates 24 of three flying posts 7, resulting in 20 radial cables 9. At the nodes where cables intersect with flying posts 7, when only one radial cable 9 and two circumferential cables 8 intersect with flying posts 7, the radial cables 9 are approximately perpendicular to the right-hand circumferential cable 8; when two radial cables 9 and circumferential cables 8 are connected to flying posts 7, the two radial cables 9 are distributed on different sides, with an angle of approximately 50° between them. This solves the technical problem of complex and diverse intersecting nodes caused by radial cables 9 of different lengths and angles, as well as circumferential cables of different angles.

[0064] The construction method for a space frame cable-stayed composite structure includes the following steps:

[0065] Step 1: Based on the construction drawings, select the tensioning method of radial cable 9 to establish the required prestress in the space frame cable assembly structure.

[0066] Step 2: Installation of the space frame cable assembly structure:

[0067] (1) Erect temporary support frame one and temporary support frame two.

[0068] (2) The poles 3 and ball nodes 2 are welded into splicing units of the space frame structure 1. The splicing units of the space frame structure 1 are hoisted in sections and fixed on the temporary support frame 1. The remaining poles 3 are then connected to complete the installation of the space frame structure 1.

[0069] (3) Install the rod 3 between temporary support frame one and temporary support frame two.

[0070] (4) Fix the top beam structure 4 to the temporary support frame 2, then install steel beam 5 between the top beam structure 4 and the space frame structure 1, then fix steel cable 6 between two adjacent steel beams 5, and at the same time fix steel cable 6 between steel beam 5 and ball joint 2, then install flying column 7 at the bottom of the top beam structure 4. Before welding the upper and lower nodes of flying column 7, carefully check the position and direction of the nodes, and use a tower crane to hoist the flying column 7 to the installation position so that the flying column 7 is connected to the corresponding node.

[0071] (5) The radial cables 9 and circumferential cables 8 are numbered and marked in the factory. After the flying column 7 is constructed, the installation deviation between the nodes used to install the radial cables 9 and circumferential cables 8 is measured. Based on the markings and installation deviations, the cable lengths of the radial cables 9 and circumferential cables 8 are adjusted, and the radial cables 9 and circumferential cables 8 are installed. This facilitates actual installation and, more importantly, ensures the accurate positioning of the nodes under the flying column 7 and the determination of the initial cable length.

[0072] A radial cable 9 is installed between the bottom end of the flying column 7 and the ball node 2 below it, and a circumferential cable 8 is installed between the bottom ends of two adjacent flying columns 7. The radial cable 9 and the circumferential cable 8 are tightened by a cable tensioning fixture. The cable tensioning fixture is existing technology and can be referred to in the prior art: a fixture device for tensioning cables in steel anchor boxes (authorization announcement number: CN208533377U). The specific structure of the cable tensioning fixture will not be described in this invention.

[0073] Step 3: After the radial cable 9 and circumferential cable 8 are tensioned, remove temporary support frame 1 and temporary support frame 2.

[0074] The following steps are included when tensioning the radial cable 9:

[0075] 1) Label the 20 radial cables 9 as follows: LS-2-1, LS-2-2, LS-2-3, LS-2-4, LS-2-5, LS-2-6, LS-2-7, LS-2-8, LS-2-9, LS-2-10, LS-2-11, LS-2-12, LS-3-1, LS-3-2, LS-3-3, LS-3-4, LS-4-1, LS-4-2, LS-4-3, LS-4-4.

[0076] 2) First, pre-tighten the 20 radial cables 9, then tension them in five batches sequentially:

[0077] First batch: LS-3-1, LS-4-1, LS-3-3, LS-4-3;

[0078] The second batch includes: LS-3-2, LS-4-2, LS-3-4, and LS-4-4.

[0079] The third batch: LS-2-3, LS-2-6, LS-2-9, LS-2-12;

[0080] Fourth batch: LS-2-2, LS-2-5, LS-2-8, LS-2-11;

[0081] The fifth batch includes: LS-2-1, LS-2-4, LS-2-7, and LS-2-10.

[0082] The requirements for radial cable 9 and circumferential cable 8 are as follows:

[0083] (1) Before cable construction, the construction quality of the relevant steel structure and its nodes should meet the relevant standards and specifications. Check whether the cable lugs are positioned to meet the design requirements. Cable structure construction can only be carried out after the inspection is completed.

[0084] (2) An adjustment device should be installed at the cable end. When installing the cable, the cable length should be adjusted by the cable end adjustment device according to the deviation of the cable manufacturing length and the actual installation deviation of the cable end connection node.

[0085] (3) Prestressing: Since the cable construction is carried out after the installation of the cable combination structure of the grid structure is completed, and the temporary support frame of the grid structure 1 and the top beam structure 4 is not removed, it is necessary to set up a safe and reliable production platform and hanging basket and other auxiliary measures when tensioning the cable. The tensioning purpose is achieved by adjusting the cable end joint. The tensioning process is carried out in accordance with the principle of symmetrical and uniform tensioning.

[0086] (4) The structure should be tensioned at both ends. The tensioning equipment should be a hydraulic jack, and the jack and its oil pressure gauge should be matched.

[0087] (5) The scaffolding shall not be removed before the tensioning is completed. After the structure is tensioned and formed, the allowable deviation of the cable force after testing is ±10%.

[0088] This invention provides a roof structure comprising a space frame structure 1, steel beams 5, and a top beam structure 4, all made of steel, giving the roof structure good rigidity and meeting the required load-bearing capacity. The top beam structure 4 is balanced by the arrangement of flying columns 7, circumferential cables 8, and radial cables 9, enabling a large-span spatial structure. Circumferentially distributed flying columns 7 are arranged at the bottom of the top beam structure 4, and circumferential cables 8 and radial cables 9 are arranged between the flying columns 7 and between the flying columns 7 and the space frame structure 1. This combination of the circular space frame and cables achieves a unique design and a coordinated and unified structural stability, solving the technical problem of complex and diverse intersection nodes caused by radial cables 9 of different lengths and angles, and circumferential cables of different angles. The number of circumferential cables 8 and radial cables 9 is relatively small, resulting in a short tensioning construction period.

[0089] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A cable-stayed space frame structure, characterized in that, include: A space frame structure, wherein the space frame structure adopts a ring structure with rods and ball joints welded and fixed, so that the middle area of ​​the space frame structure forms an installation opening; A steel beam, wherein the steel beam is welded and fixed to the ball joint located above it; A top beam structure is provided, with the top beam structure located at the center of the mounting opening, and the steel beam and the top beam structure are fixedly connected. A flying column is fixed to the bottom of the top beam structure. The flying column is inclined downward and the bottom ends of the flying column are distributed on the same circumference, so that the axis of the flying column is distributed on the surface of the frustum. Steel cables are fixedly connected between two adjacent steel beams and between the steel beams and the ball joints; A circumferential cable is provided between the bottom ends of two adjacent flying columns, and a radial cable is provided between the bottom end of the flying column and the ball node below it; The top beam structure includes a central column, a connecting plate one, and a connecting plate two. The connecting plate one is horizontally welded to the outer surface of the vertical central column. The connecting plate one located below is used to connect the flying column. The connecting plate two is vertically welded between two adjacent connecting plates one. At the same time, the connecting plate two is welded to the central column. The connecting plate two is used to connect the steel beam. The first connecting plate is provided in three pieces, so that the second connecting plate is distributed in layers. The steel beam is divided into two layers. A single steel beam in the lower layer is set in the area between two adjacent steel beams in the upper layer. The steel beam in the upper layer is fixed to the first connecting plate above it, and the steel beam in the lower layer is fixed to the first connecting plate below it.

2. The cable-stayed structure according to claim 1, characterized in that: A connecting plate three is welded to the end of the web of the steel beam, and an ear plate one is welded between the connecting plate three and the connecting plate two. A connecting plate four is welded to the other end of the web of the steel beam, and a connecting plate five is welded to the ball joint located above. An ear plate two is welded between the connecting plate four and the connecting plate five.

3. The cable-stayed structure according to claim 1, characterized in that: Steel plates are welded at equal intervals on both sides of the web of the steel beam. A steel cable is installed between the steel plates at the same position of two adjacent steel beams. At the same time, a steel cable is installed between the front and rear steel plates of two adjacent steel beams. A steel plate is welded to the ball joint at the top. A steel cable is installed between the outermost steel plates and the steel plate, so that the steel cables between two adjacent steel beams are distributed in a V-shape.

4. The cable-stayed structure according to claim 1, characterized in that: Two ear plates are welded to the bottom of the flying column. The two ear plates are symmetrically arranged about the axis of the flying column. The circumferential cable is fixed between the ear plates of two adjacent flying columns.

5. A cable-stayed structure according to claim 1, characterized in that: The 12 flying columns are connected to the 12 circumferential cables; one or two ear plates four are welded to the bottom of the flying column, and a single ear plate five is welded to the ball node below; a radial cable is set on a single ear plate five and a single ear plate four of the flying column; or a radial cable is set on a single ear plate five and a three ear plates four of the flying columns; so that 20 radial cables are set.

6. A construction method for a space frame cable-stayed composite structure as described in claim 5, characterized in that, Includes the following steps: Step 1: Select the radial cable tensioning method according to the construction drawings to establish the required prestress in the space frame cable assembly structure; Step 2: Installation of the space frame cable assembly structure: (1) Erect temporary support frame one and temporary support frame two; (2) The space frame structure splicing unit is formed by welding the rods and ball joints. The space frame structure splicing unit is hoisted in sections and fixed on the temporary support frame. The remaining rods are then connected to complete the installation of the space frame structure. (3) Install the rods between temporary support frame one and temporary support frame two; (4) Fix the top beam structure on the temporary support frame 2, then install steel beams between the top beam structure and the space frame structure, then fix steel cables between two adjacent steel beams, and fix steel cables between the steel beams and the ball joints, and then install flying columns at the bottom of the top beam structure; (5) A radial cable is installed between the bottom of the flying column and the ball node below it, and a circumferential cable is installed between the bottom of two adjacent flying columns. The radial cable and the circumferential cable are tightened by a cable tensioning fixture. The tightening process is carried out on the auxiliary measures of the erection. Step 3: After the radial and circumferential cables are tensioned, remove temporary support frame one and temporary support frame two.

7. The construction method of a space frame cable-stayed composite structure according to claim 6, characterized in that: In the factory, the radial and circumferential cables are numbered and marked. After the fly column construction is completed, the installation deviation between the nodes used to install the radial and circumferential cables is measured. Based on the markings and installation deviations, the cable lengths of the radial and circumferential cables are adjusted, and the radial and circumferential cables are installed.

8. The construction method of a space frame cable-stayed composite structure according to claim 6, characterized in that: The following steps are included when tensioning radial cables: 1) Label the 20 radial cables as follows: LS-2-1, LS-2-2, LS-2-3, LS-2-4, LS-2-5, LS-2-6, LS-2-7, LS-2-8, LS-2-9, LS-2-10, LS-2-11, LS-2-12, LS-3-1, LS-3-2, LS-3-3, LS-3-4, LS-4-1, LS-4-2, LS-4-3, LS-4-4; 2) First, pre-tighten the 20 radial cables, then tension them in five batches sequentially: First batch: LS-3-1, LS-4-1, LS-3-3, LS-4-3; The second batch includes: LS-3-2, LS-4-2, LS-3-4, and LS-4-4. The third batch: LS-2-3, LS-2-6, LS-2-9, LS-2-12; Fourth batch: LS-2-2, LS-2-5, LS-2-8, LS-2-11; The fifth batch includes: LS-2-1, LS-2-4, LS-2-7, and LS-2-10.

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