A double load-bearing cable system with square cable structure

Abstract

The present invention relates to the technical field of structural design of construction engineering, and in particular to a square-type cable structure system of a double load-bearing cable system, comprising: an upper cable net, a first group of lower cable nets, a second group of lower cable nets and struts; the cross cables of the upper cable net intersect to form a first type of cross cable node and a second type of cross cable node; the first group of lower cable nets provide support for the first type of cross cable node, and the struts are connected between the nodes of the first group of lower cable nets and the corresponding first type of cross cable nodes; the second group of lower cable nets provide support for all or part of the second type of cross cable nodes, and the struts are connected between the nodes of the second group of lower cable nets and the corresponding second type of cross cable nodes. The system achieves more reasonable structural stress and better economy by adjusting the arrangement of the lower cable net without changing the shape of the upper cable net and increasing the difficulty of construction.

Description

Technical Field

[0001] The invention relates to the technical field of structural design of building engineering, in particular to a linked square cable structure system of a double load-bearing cable system. Background Art

[0002] The prestressed cable structure is composed of flexible cables that are only subjected to tension and rigid components that are subjected to tension and compression. It is a type of large-span structural system with strong spanning capacity and good force-bearing performance. It is widely used in the roof structure of large-span buildings such as stadiums and exhibition halls. Since the cables are made of high-strength materials and are in a tensile state during the structural load-bearing process, there is no problem of component stability and the force-bearing efficiency is high. Therefore, its cross-sectional size is much smaller than that of concrete and steel components, which can create a light and transparent architectural effect.

[0003] In recent years, in the engineering practice of large-span buildings such as stadiums, a square-type cable structure system consisting of an upper cable net 101, a lower cable net 102 and struts 103 has emerged. The upper cable net 101 of the structure system consists of upper ring cables 301 and cross cables 302, wherein the cross cables 302 form a square-type grid within the upper cable net surface; the lower cable net 102 consists of lower ring cables 105 and radial cables 106, wherein the radial cables 106 are arranged radially, such as Figure 1 As shown. Since the grid formed by the upper cable net has a strong regularity, it helps to create a rhythmic architectural effect, while the lower cable net can provide relatively efficient load-bearing without affecting the architectural effect. Therefore, this structural system realizes the organic integration of architecture and structure and is welcomed by architects and structural engineers.

[0004] When applied to circular, elliptical or four-centered circular buildings such as stadiums, the above-mentioned square cable structure system has two characteristics:

[0005] (1) As the circumferential size of the building gradually increases from the center of the field to the outside, the mesh size of the upper cable net is uneven, showing a pattern of gradually increasing from the inside to the outside. The mesh size of the outer circle can be more than twice that of the inner circle.

[0006] (2) When the cantilever distance of the structure is long and the load effects of wind, snow, etc. are significant, it is necessary to set struts between the lower cable net and the upper cable net to improve the structural integrity and local stiffness.

[0007] In the current technology, braces 103 are provided at all cross-cable nodes 104, such as Figure 2 This arrangement can effectively improve the structural stress performance, but it also brings several problems:

[0008] (1) There are many radial cables in the lower layer, and the number of cable clamps in the lower ring cable is twice that of the upper ring cable. The amount of cables used in the lower layer of cable net and the weight of the cable clamp nodes are large;

[0009] (2) Since the nodes where half of the radial cables 106 are connected to the lower hoop cables 105 do not have corresponding cross-cable nodes 104, no braces are provided at these lower hoop cable nodes. Figure 3 As shown, the figure shows a lower hoop cable node 108 without a support rod and a lower hoop cable node 107 with a support rod, resulting in an unreasonable stress state of the lower hoop cable;

[0010] (3) The number of segments of the lower ring rope is twice that of the upper ring rope, and the angle between adjacent segments of the lower ring rope is greater than the angle between adjacent segments of the upper ring rope, resulting in a lower force efficiency of the lower ring rope.

[0011] The above problems reduce the safety and economy of this structural system to a certain extent and increase the difficulty of its engineering application.

[0012] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0013] The purpose of the present invention is to provide a double load-bearing cable system of linked square cable structure to solve the technical problems existing in the prior art. The system achieves more reasonable structural stress and better economy by adjusting the layout of the lower cable net without changing the shape of the upper cable net and increasing the construction difficulty.

[0014] In order to achieve the above object, the present invention adopts the following technical solutions:

[0015] The present invention provides a double load-bearing cable system of a square-type cable structure, which comprises: an upper cable net, a first group of lower cable nets, a second group of lower cable nets and a support rod;

[0016] The cross cables of the upper cable network intersect to form a first type of cross cable node and a second type of cross cable node;

[0017] The first group of lower cable nets provide support for the first type of cross cable nodes, and the braces are connected between the nodes of the first group of lower cable nets and the corresponding first type of cross cable nodes;

[0018] The second group of lower cable nets provides support for all or part of the second type of cross-cable nodes, and the struts are connected between the nodes of the second group of lower cable nets and the corresponding second type of cross-cable nodes.

[0019] Preferably, the upper cable net comprises: an upper ring cable and a cross cable;

[0020] The cross ropes form a linked square grid;

[0021] The vertices of the linked square grid are defined as cross-cable nodes, the outermost circle cross-cable nodes are connected to the outer boundary, and the innermost circle cross-cable nodes are connected to the upper ring cable to form an upper ring cable node;

[0022] The cross-cable nodes are divided into first-type cross-cable nodes and second-type cross-cable nodes; the projection of the first-type cross-cable nodes is located on the radial axis passing through the upper ring-cable node; the projection of the second-type cross-cable nodes is located on the radial axis not passing through the upper ring-cable node.

[0023] Preferably, the first group of lower cable nets includes: lower inner ring cables and long radial cables;

[0024] The lower inner ring rope is located below the upper ring rope;

[0025] The long radial cable extends from the outer boundary to the lower inner ring cable, and its projection is located on the radial axis where the projection of the first type of cross cable node is located.

[0026] Preferably, the second group of lower cable nets includes: lower outer ring cables and short radial cables;

[0027] The lower outer ring cable is arranged below a circle of second-type cross cable nodes;

[0028] The short radial cable extends from the outer boundary to the lower outer ring cable, and its projection is located on the radial axis where the projection of the second type of cross cable node is located.

[0029] Preferably, the braces are divided into first-type braces and second-type braces;

[0030] The first type of struts connect the nodes of the first group of lower cable nets and the corresponding first type of cross cable nodes;

[0031] The second type of struts connect the nodes of the second group of lower cable nets and the corresponding second type of cross cable nodes.

[0032] By adopting the above technical solution, the present invention has the following beneficial effects:

[0033] 1. The present invention provides load-bearing for the entire structural system more efficiently and reasonably by setting two sets of lower cable nets. In each set of lower cable nets, the number of radial cables connected to the hoop cables is halved compared with the prior art, the angle between adjacent hoop cable sections is reduced, and the hoop cable force efficiency is effectively improved.

[0034] 2. In the two groups of lower cable nets of the present invention, struts are provided at the connection points between all radial cables and ring cables, thus avoiding the problem in the prior art that no struts are provided at the connection points between some lower radial cables and lower ring cables, resulting in the lower ring cables needing to balance the vertical force of the lower radial cables and receiving unreasonable force.

[0035] 3. The present invention can reduce the amount of cables that can be used by improving the force-bearing efficiency of the lower cable net. At the same time, due to the reduction in cable diameter, the weight of the cable clamp nodes can also be reduced, thereby improving the economy of the entire structure.

[0036] 4. The two groups of lower cable nets of the present invention can be lifted and tensioned independently, and the installation process does not interfere with each other. They can be implemented synchronously or step by step, and the construction is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a schematic diagram of a square-type cable structure system in the prior art.

[0039] Figure 2 The figure is a schematic diagram of the arrangement of the braces in the prior art.

[0040] Figure 3 The present invention is a schematic diagram of a lower ring cable node with and without a support rod in the prior art.

[0041] Figure 4 This is an axonometric diagram of the connected square cable structure system of the double load-bearing cable system provided in Example 1 of the present invention.

[0042] Figure 5 A plan view of the connected square cable structure system of the double load-bearing cable system provided in Example 1 of the present invention.

[0043] Figure 6 This is a plan view of the upper cable net of the linked square cable structure system of the double load-bearing cable system provided in Example 1 of the present invention.

[0044] Figure 7 This is an elevation view of the connected square cable structure system of the double load-bearing cable system provided in Example 1 of the present invention.

[0045] Figure 8 This is an exploded view of the connected square cable structure system of the double load-bearing cable system provided in Example 1 of the present invention.

[0046] Fig. 9 This is a detailed exploded diagram of the linked square cable structure system of the double load-bearing cable system provided in Example 1 of the present invention.

[0047] Fig.10 This is an axonometric diagram of the connected square cable structure system of the double load-bearing cable system provided in Example 2 of the present invention.

[0048] Fig.11 A plan view of the connected square cable structure system of the double load-bearing cable system provided in Example 2 of the present invention.

[0049] Fig.12 This is a plan view of the upper cable net of the linked square cable structure system of the double load-bearing cable system provided in Example 2 of the present invention.

[0050] Fig.13 This is an elevation view of the connected square cable structure system of the double load-bearing cable system provided in Example 2 of the present invention.

[0051] Fig.14 This is an exploded view of the connected square cable structure system of the double load-bearing cable system provided in Example 2 of the present invention.

[0052] Fig.15 This is a detailed exploded diagram of the connected square cable structure system of the double load-bearing cable system provided in Example 2 of the present invention.

[0053] Among them: 101 is the upper cable net, 102 is the lower cable net, 103 is the strut, 104 is the cross cable node, 105 is the lower ring cable, 106 is the radial cable, 107 is the lower ring cable node with struts, 108 is the lower ring cable node without struts, 201 is the first group of lower cable nets, 202 is the second group of lower cable nets, 203 is the first type of struts, 204 is the second type of struts, 301 is the upper ring cable, 302 is the cross cable, 303 is the lower inner ring cable, 304 is the long radial cable, 305 is the lower outer ring cable, 306 is the short radial cable, 401 is the outer boundary, 402 is the upper ring cable node, 403 is the first type of cross cable node, and 404 is the second type of cross cable node. DETAILED DESCRIPTION

[0054] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0056] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0058] Embodiment 1

[0059] Combination Figures 4 to 9 As shown, this embodiment provides a linked square cable structure system of a double load-bearing cable system, which includes: an upper cable net 101, a first group of lower cable nets 201, a second group of lower cable nets 202 and struts 103; the cross cables 302 of the upper cable net 101 intersect to form a first type of cross cable node 403 and a second type of cross cable node 404; the first group of lower cable nets 201 provide support for the first type of cross cable node 403, and the struts 103 are connected between the nodes of the first group of lower cable nets 201 and the corresponding first type of cross cable nodes 403; the second group of lower cable nets 202 provide support for part of the second type of cross cable nodes 404, and the struts 103 are connected between the nodes of the second group of lower cable nets 202 and the corresponding second type of cross cable nodes 404. The linked square cable structure system of the double load-bearing cable system achieves more reasonable structural stress and better economy by adjusting the arrangement of the lower cable net without changing the shape of the upper cable net 101 and increasing the difficulty of construction.

[0060] In this embodiment, preferably, the upper cable net 101 includes: an upper ring cable 301 and a cross cable 302; the cross cable 302 forms a linked square grid; the vertices of the linked square grid are defined as the cross cable 302 nodes, the outermost circle cross cable 302 nodes are connected to the outer boundary 401, and the innermost circle cross cable 302 nodes are connected to the upper ring cable 301 to form the upper ring cable nodes 402;

[0061] According to different positions, the cross-cable 302 nodes are divided into first-type cross-cable nodes 403 and second-type cross-cable nodes 404; the projection of the first-type cross-cable node 403 is located on the radial axis passing through the upper ring-cable node 402; the projection of the second-type cross-cable node 404 is located on the radial axis not passing through the upper ring-cable node 402, and there are three circles in total, which are divided into an inner circle, a middle circle and an outer circle from the inside to the outside.

[0062] Preferably, the first group of lower layer cable nets 201 includes: a lower inner ring cable 303 and a long radial cable 304; the lower inner ring cable 303 is located below the upper ring cable 301; the long radial cable 304 extends from the outer boundary 401 to the lower inner ring cable 303, and its projection is located on the radial axis where the projection of the first type of cross cable node 403 is located.

[0063] Preferably, the second group of lower cable nets 202 includes: lower outer ring cables 305 and short radial cables 306; the lower outer ring cables 305 are arranged below the outer ring second type cross cable nodes 404; the short radial cables 306 extend from the outer boundary 401 to the lower outer ring cables 305, and their projections are located on the radial axis where the projections of the second type cross cable nodes 404 are located. According to the load effect analysis, the components at the inner and middle ring second type cross cable nodes 404 can meet the bearing requirements without support, so the lower outer ring cables 305 are arranged below the outer ring second type cross cable nodes 404, and only support is provided for the outer ring second type cross cable nodes 404, thereby shortening the force transmission path of the second group of lower cable nets 202 and improving its force efficiency.

[0064] Preferably, the struts 103 are divided into first-type struts 203 and second-type struts 204; the first-type struts 203 connect the nodes of the first group of lower cable nets 201 and the corresponding first-type cross-cable nodes 403; the second-type struts 204 connect the nodes of the second group of lower cable nets 202 and the corresponding second-type cross-cable nodes 404.

[0065] Embodiment 2

[0066] Combination Figures 10 to 15 As shown, this embodiment provides a linked square cable structure system of a double load-bearing cable system, which includes: an upper cable net 101, a first group of lower cable nets 201, a second group of lower cable nets 202 and struts 103; the cross cables 302 of the upper cable net 101 intersect to form a first type of cross cable node 403 and a second type of cross cable node 404; the first group of lower cable nets 201 provide support for the first type of cross cable node 403, and the struts 103 are connected between the nodes of the first group of lower cable nets 201 and the corresponding first type of cross cable nodes 403; the second group of lower cable nets 202 provide support for part of the second type of cross cable nodes 404, and the struts 103 are connected between the nodes of the second group of lower cable nets 202 and the corresponding second type of cross cable nodes 404. The linked square cable structure system of the double load-bearing cable system achieves more reasonable structural stress and better economy by adjusting the arrangement of the lower cable net without changing the shape of the upper cable net 101 and increasing the difficulty of construction.

[0067] In this embodiment, preferably, the upper cable net 101 includes: an upper ring cable 301 and a cross cable 302; the cross cable 302 forms a linked square grid; the vertices of the linked square grid are defined as the cross cable 302 nodes, the outermost circle cross cable 302 nodes are connected to the outer boundary 401, and the innermost circle cross cable 302 nodes are connected to the upper ring cable 301 to form the upper ring cable nodes 402;

[0068] According to different positions, the cross-cable 302 nodes are divided into first-type cross-cable nodes 403 and second-type cross-cable nodes 404; the projection of the first-type cross-cable node 403 is located on the radial axis passing through the upper ring-cable node 402; the projection of the second-type cross-cable node 404 is located on the radial axis not passing through the upper ring-cable node 402, and there are three circles in total, which are divided into an inner circle, a middle circle and an outer circle from the inside to the outside.

[0069] Preferably, the first group of lower layer cable nets 201 includes: a lower inner ring cable 303 and a long radial cable 304; the lower inner ring cable 303 is located below the upper ring cable 301; the long radial cable 304 extends from the outer boundary 401 to the lower inner ring cable 303, and its projection is located on the radial axis where the projection of the first type of cross cable node 403 is located.

[0070] Preferably, the second group of lower cable nets 202 includes: lower outer ring cables 305 and short radial cables 306; the lower outer ring cables 305 are arranged below the middle circle second type cross cable nodes 404; the short radial cables 306 extend from the outer boundary 401 to the lower outer ring cables 305, and their projections are located on the radial axis where the projections of the second type cross cable nodes 404 are located. According to the load effect analysis, the components at the inner circle second type cross cable nodes 404 can meet the bearing requirements without support, so the lower outer ring cables 305 are arranged below the middle circle second type cross cable nodes 404, and only the middle circle and outer circle second type cross cable nodes 404 are provided with support, thereby shortening the force transmission path of the second group of lower cable nets 202 and improving its force efficiency.

[0071] Preferably, the struts 103 are divided into first-type struts 203 and second-type struts 204; the first-type struts 203 connect the nodes of the first group of lower cable nets 201 and the corresponding first-type cross-cable nodes 403; the second-type struts 204 connect the nodes of the second group of lower cable nets 202 and the corresponding second-type cross-cable nodes 404.

[0072] In summary, by adopting the above technical solution, the present invention has the following advantages:

[0073] 1. The present invention provides load-bearing for the entire structural system more efficiently and reasonably by setting two sets of lower cable nets. In each set of lower cable nets, the number of radial cables connected to the hoop cables is halved compared with the prior art, the angle between adjacent hoop cable sections is reduced, and the hoop cable force efficiency is effectively improved.

[0074] 2. In the two groups of lower cable nets of the present invention, struts are provided at the connection points between all radial cables and ring cables, thus avoiding the problem in the prior art that no struts are provided at the connection points between some lower radial cables and lower ring cables, resulting in the lower ring cables needing to balance the vertical force of the lower radial cables and receiving unreasonable force.

[0075] 3. The present invention can reduce the amount of cables that can be used by improving the force-bearing efficiency of the lower cable net. At the same time, due to the reduction in cable diameter, the weight of the cable clamp nodes can also be reduced, thereby improving the economy of the entire structure.

[0076] 4. The two groups of lower cable nets of the present invention can be lifted and tensioned independently, and the installation process does not interfere with each other. They can be implemented synchronously or step by step, and the construction is convenient.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double load-bearing cable system with a square cable structure, characterized in that: include: The upper cable net, the first set of lower cable nets, the second set of lower cable nets and the struts; The cross cables of the upper cable network intersect to form a first type of cross cable node and a second type of cross cable node; The first group of lower cable nets provide support for the first type of cross cable nodes, and the braces are connected between the nodes of the first group of lower cable nets and the corresponding first type of cross cable nodes; The second group of lower cable nets provide support for all or part of the second type of cross cable nodes, and the braces are connected between the nodes of the second group of lower cable nets and the corresponding second type of cross cable nodes; The upper cable net comprises: an upper ring cable and a cross cable; The cross ropes form a linked square grid; The vertices of the linked square grid are defined as cross-cable nodes, the outermost circle cross-cable nodes are connected to the outer boundary, and the innermost circle cross-cable nodes are connected to the upper ring cable to form an upper ring cable node; The cross-cable nodes are divided into first-type cross-cable nodes and second-type cross-cable nodes; the projection of the first-type cross-cable nodes is located on the radial axis passing through the upper ring-cable node; the projection of the second-type cross-cable nodes is located on the radial axis not passing through the upper ring-cable node; The first group of lower cable nets includes: lower inner ring cables and long radial cables; The lower inner ring rope is located below the upper ring rope; The long radial cable extends from the outer boundary to the lower inner ring cable, and its projection is located on the radial axis where the projection of the first type of cross cable node is located; The second group of lower cable nets includes: lower outer ring cables and short radial cables; The lower outer ring cable is arranged below a circle of second-type cross cable nodes; The short radial cable extends from the outer boundary to the lower outer ring cable, and its projection is located on the radial axis where the projection of the second type of cross cable node is located.

2. The double load-bearing cable system of claim 1 is characterized in that: The braces are divided into first-class braces and second-class braces; The first type of struts connect the nodes of the first group of lower cable nets and the corresponding first type of cross cable nodes; The second type of struts connect the nodes of the second group of lower cable nets and the corresponding second type of cross cable nodes.

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