A double-layer cable structure system combining a quadrilateral and ribbed ring grid

Abstract

The present invention relates to the technical field of building structures, and in particular to a double-layer cable structure system combining a square grid and a ribbed ring grid. This system combines the cable net of the square grid and the radial cable system. The inner end of the radial cable system is connected to the ring cable, and the outer end is connected to the cable net of the square grid, which can achieve uniform distribution of the ring cable tension, greatly reduce the unbalanced force of the cable clamp, and meet the building requirements with a complete cable structure without setting additional steel structure canopies, realizing the installation of the entire roof structure with one lift and tensioning, significantly improving the construction convenience and greatly shortening the construction period.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, and particularly to a double-layer cable structure system combining a quadrilateral and a ribbed ring grid. Background Art

[0002] The prestressed cable structure is composed of flexible cables that only bear tension and rigid members that bear tension and compression. It is a large-span structure system with strong spanning ability and good mechanical properties. 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 member stability and the stress efficiency is high. Therefore, its cross-sectional size is much smaller than that of concrete and steel members, and a light and transparent building effect can be created.

[0003] Currently, the structures of stadiums such as track and field stadiums and professional football stadiums are composed of a grandstand structure 101 surrounding the central field, a roof structure 102, and a roof support structure 103, as Figure 1 shown. The main function of the roof structure 102 is to shield the grandstand and hang catwalks, lighting and sound equipment, etc. Since a column-free space needs to be created inside the stadium and the sky above the central field of the stadium is generally open-air, the roof is usually arranged around the field and only covers the grandstand area. It is constructed by a large-span structure with a large central opening, and the shape of the central opening generally matches the inner edge shape of the grandstand around the field.

[0004] Due to its significant advantages in mechanical properties and building effects, the prestressed cable structure has been widely used in stadium roof structures. The roof cable structure usually consists of a ring cable 201 near the central opening and a cross cable system between the ring cable 201 and the outer boundary 202. According to the architectural styling requirements, the cross cable system can adopt a quadrilateral grid cable net 203 or a radial cable system 204, as Figure 2 shown. For a double-layer cable structure, both the upper and lower layers can adopt a quadrilateral grid cable net 203, or both can adopt a radial cable system 204. It is also possible that the upper layer adopts a quadrilateral grid cable net 203 and the lower layer adopts a radial cable system 204, or vice versa, as Figure 3 shown.

[0005] When the cross cable system between the ring cable and the outer boundary is a quadrilateral grid, since there is inevitably a component force in the tangential direction of the ring cable in the cross cable system, a large unbalanced force will be generated at the cable clamp node where the cross cable system is connected to the ring cable, resulting in an increase in the volume of the cable clamp and even the need to set up a special balance cable to resist the unbalanced force at the cable clamp, which brings difficulties to the structural design and construction and increases the project cost. In addition, to meet the building requirements, an additional steel structure canopy 205 may also be set inside the area enclosed by the ring cable, as Figure 4As shown. This structural arrangement will result in complex structure and force at the connection between the cable structure and the steel structure canopy 205, and it is necessary to install the steel structure canopy 205 separately after the cable structure is tensioned, with high design difficulty, long construction period and high risk.

[0006] The information disclosed in this background art section is only intended to deepen the understanding of the overall background art of the present invention, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0007] The object of the present invention is to provide a double-layer cable structure system combining a quadrilateral and a ribbed ring grid to solve the technical problems existing in the prior art. This system combines the cable net of the quadrilateral grid and the radial cable system. The inner ends of the radial cable system are connected to the ring cable, and the outer ends are connected to the cable net of the quadrilateral grid, which can achieve uniform distribution of the ring cable force, greatly reduce the unbalanced force of the cable clamp, and meet the building requirements with a complete cable structure, without the need to set up additional steel structure canopies, and the entire roof structure can be installed by one-time lifting and tensioning, significantly improving the construction convenience and greatly shortening the construction period.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] The present invention provides a double-layer cable structure system combining a quadrilateral and a ribbed ring grid, including: an upper cable net, a lower cable system, a ring cable strut and a cross cable system strut; the upper cable net adopts a layout form combining a quadrilateral and a ribbed ring grid; the ring cable strut and the cross cable system strut are located between the upper cable net and the lower cable system, and the ring cable strut and the cross cable system strut connect the corresponding upper cable net nodes and lower cable system nodes.

[0010] Preferably, the upper cable net includes: an upper ring cable, upper radial cables, upper cross cables and upper balance cables; the upper ring cable is located in the middle area of the roof, enclosing the shape of the roof center opening; the inner ends of the upper radial cables are connected to the nodes of the upper ring cable, and the plane projection of the upper radial cables is consistent or tends to be consistent with the angular bisector direction of the plane projections of two adjacent segments of the upper ring cable; the upper cross cables form a series of quadrilateral grids, the nodes of the outermost upper cross cables are connected to the outer boundary, and the nodes of the innermost upper cross cables are connected to the outer ends of the upper radial cables; the upper balance cables are arranged at the connection nodes of the upper radial cables and the upper cross cables, successively connecting the connection nodes of the upper radial cables and the upper cross cables to form a closed ring.

[0011] Preferably, the lower cable system includes a lower ring cable and lower radial cables; the lower ring cable is located in the middle area of the roof; the outer ends of the lower radial cables are connected to the outer boundary, and the inner ends are connected to the nodes of the lower ring cable. The planar projection of the lower radial cables is aligned or tends to be aligned with the angular bisector direction of the planar projections of two adjacent segments of the lower ring cable.

[0012] Preferably, the ring cable strut connects the upper ring cable node and the lower ring cable node; when the horizontal projections of the upper ring cable and the lower ring cable coincide, the ring cable strut is arranged vertically; when the horizontal projections of the upper ring cable and the lower ring cable do not coincide, the ring cable strut is arranged obliquely.

[0013] Preferably, the cross-cable system strut connects the upper cross-cable node and the lower radial cable node, and the cross-cable system strut is arranged vertically.

[0014] Preferably, the double-layer cable structure system combining the quadrilateral and ribbed ring grids proposed by the present invention needs to apply prestress, which is balanced with the weight of the roof and meets the structural stiffness requirements.

[0015] Adopting the above technical solutions, the present invention has the following beneficial effects:

[0016] 1. The present invention provides an upper balance cable between the connection nodes of the upper radial cables and the upper cross-cables, which can balance the circumferential component force of the upper cross-cables at the innermost ring nodes, enabling the upper radial cables to only transmit the radial component force of the upper cross-cables. Further, by making the planar projection of the upper radial cables aligned or tend to be aligned with the angular bisector direction of the planar projections of two adjacent segments of the upper ring cables, the cable forces in the ring cables can be made more uniform, and the unbalanced force at the cable clamp is significantly reduced compared to the direct connection method between the upper cross-cables and the upper ring cables, thereby reducing the volume of the cable clamp and improving the structural safety and economy.

[0017] 2. The present invention arranges the upper ring cable at the roof opening, directly enclosing to form the shape of the roof center opening required for the building, and connecting it to the rest of the roof structure through the upper radial cables and the ring cable struts, without the need to set up a steel structure canopy. This method can achieve the installation of the entire roof structure only through one lift and tensioning, significantly improving the construction convenience and greatly shortening the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the composition of the stadium structure system in the prior art.

[0020] Figure 2 It is a schematic diagram of the crosswise cable system of the stadium roof cable structure in the prior art.

[0021] Figure 3 It is a schematic diagram of the stadium roof cable structure system in the prior art.

[0022] Figure 4 It is a schematic diagram of the steel structure canopy of the stadium roof in the prior art.

[0023] Figure 5 It is an axonometric drawing of the double-layer cable structure system combining the square and ribbed ring grids provided by the embodiment of the present invention.

[0024] Figure 6 It is a plan view of the double-layer cable structure system combining the square and ribbed ring grids provided by the embodiment of the present invention.

[0025] Figure 7 It is an elevation view of the double-layer cable structure system combining the square and ribbed ring grids provided by the embodiment of the present invention.

[0026] Figure 8 It is an exploded view of the double-layer cable structure system combining the square and ribbed ring grids provided by the embodiment of the present invention.

[0027] Figure 9 It is a detailed exploded view of the double-layer cable structure system combining the square and ribbed ring grids provided by the embodiment of the present invention.

[0028] Wherein: 101 is the grandstand structure, 102 is the roof structure, 103 is the roof support structure, 201 is the ring cable, 202 is the outer boundary, 203 is the square grid cable net, 204 is the radial cable system, 205 is the steel structure canopy, 301 is the upper ring cable, 302 is the upper radial cable, 303 is the upper cross cable, 304 is the upper balance cable, 305 is the lower ring cable, 306 is the lower radial cable, 307 is the ring cable strut, 308 is the crosswise cable system strut, 401 is the upper cable net, 402 is the lower cable system, 501 is the upper ring cable node, 502 is the connection node of the upper radial cable and the upper cross cable, 503 is the upper cross cable node, 504 is the lower ring cable node, 505 is the lower radial cable node, 506 is the upper end point of the ring cable strut, 507 is the lower end point of the ring cable strut, 508 is the upper end point of the crosswise cable system strut, 509 is the lower end point of the crosswise cable system strut. Detailed implementation manners

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is 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 should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] The following will describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0033] Combined Figures 5 to 9 As shown, this embodiment provides a double-layer cable structure system combining a square-grid and rib-ring grid, including: an upper cable net 401, a lower cable system 402, a ring cable strut 307, and a cross cable system strut 308; the upper cable net 401 adopts an arrangement form combining a square-grid and a rib-ring grid; the ring cable strut 307 and the cross cable system strut 308 are located between the upper cable net 401 and the lower cable system 402, and the ring cable strut 307 and the cross cable system strut 308 connect the corresponding nodes of the upper cable net 401 and the lower cable system 402. This system combines the cable net of the square-grid and the radial cable system. The inner end of the radial cable system is connected to the ring cable, and the outer end is connected to the cable net of the square-grid, which can achieve uniform distribution of the ring cable force, greatly reduce the unbalanced force of the cable clamp, and meet the building requirements with a complete cable structure without setting additional steel structure canopies, realizing the installation of the entire roof structure by one-time lifting and tensioning, significantly improving the construction convenience and greatly shortening the construction period.

[0034] Preferably, the upper cable net 401 includes: an upper ring cable 301, upper radial cables 302, upper cross cables 303 and upper balance cables 304; the upper ring cable 301 is located in the middle area of the roof and encloses a roof center opening shape; the inner ends of the upper radial cables 302 are connected to the upper ring cable nodes 501, and the planar projection of the upper radial cables 302 is consistent with or tends to be consistent with the angular bisector direction of the planar projections of two adjacent sections of the upper ring cable 301; the upper cross cables 303 form a series of diamond-shaped grids, the outermost upper cross cable nodes 503 are connected to the outer boundary 202, and the innermost upper cross cable nodes 503 are connected to the outer ends of the upper radial cables 302; the upper balance cables 304 are arranged at the connection nodes 502 between the upper radial cables and the upper cross cables, sequentially connecting the connection nodes 502 between the upper radial cables and the upper cross cables to form a closed loop.

[0035] Preferably, the lower cable system 402 includes a lower ring cable 305 and lower radial cables 306; the lower ring cable 305 is located in the middle area of the roof; the outer ends of the lower radial cables 306 are connected to the outer boundary 202, and the inner ends are connected to the lower ring cable nodes 504, and the planar projection of the lower radial cables 306 is consistent with or tends to be consistent with the angular bisector direction of the planar projections of two adjacent sections of the lower ring cable 305.

[0036] Preferably, the ring cable strut 307 connects the upper ring cable node 501 and the lower ring cable node 504; when the horizontal projections of the upper ring cable 301 and the lower ring cable 305 coincide, the ring cable strut 307 is arranged vertically; when the horizontal projections of the upper ring cable 301 and the lower ring cable 305 do not coincide, the ring cable strut 307 is arranged obliquely.

[0037] Preferably, the span cable system strut 308 connects the upper cross cable node 503 and the lower radial cable node 505, and the span cable system strut 308 is arranged vertically.

[0038] In summary, in the present invention, an upper balance cable 304 is arranged between the connection nodes 502 of the upper radial cables and the upper cross cables, which can balance the circumferential component force of the upper cross cables 303 at the innermost nodes, so that the upper radial cables 302 only transmit the radial component force of the upper cross cables 303; further, by making the planar projection of the upper radial cables 302 consistent with or tend to be consistent with the angular bisector direction of the planar projections of two adjacent sections of the upper ring cable 301, the cable force of the upper ring cable 301 can be made more uniform, and the unbalanced force at the cable clamp is greatly reduced compared with the way that the upper cross cables 303 are directly connected to the upper ring cable 301, thereby reducing the volume of the cable clamp and improving the structural safety and economy.

[0039] In the present invention, the upper ring cable 301 is arranged at the roof opening, directly enclosing to form the shape of the roof center opening required for the building, and is connected to the rest of the roof structure through the upper radial cables 302 and the ring cable struts 307, without the need to set up the steel structure canopy 205. This method can achieve the installation of the entire roof structure only through one lifting and tensioning, significantly improving the construction convenience and greatly shortening the construction period.

[0040] 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 them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and 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-layer cable structure system combining a jointed square type and a ribbed ring type grid, characterized in that, Including: An upper cable net, a lower cable system, ring cable struts and crosswise cable system struts; The upper cable net adopts an arrangement form combining a quadrilateral and a ribbed ring grid; The ring cable struts and crosswise cable system struts are located between the upper cable net and the lower cable system, and the ring cable struts and crosswise cable system struts connect the corresponding upper cable net nodes and lower cable system nodes; The upper cable net includes: an upper ring cable, upper radial cables, upper cross cables and upper balance cables; The upper ring cable is located in the middle area of the roof, enclosing a central opening shape of the roof; and is connected to the rest of the roof structure through upper radial cables and ring cable struts, without the need to set up a steel structure canopy; The inner ends of the upper radial cables are connected to the upper ring cable nodes, and the planar projection of the upper radial cables is consistent or tends to be consistent with the angular bisector direction of the planar projections of two adjacent sections of the upper ring cable; The upper cross cables form a series of quadrilateral grids, the nodes of the outermost upper cross cables are connected to the outer boundary, and the nodes of the innermost upper cross cables are connected to the outer ends of the upper radial cables; The upper balance cables are arranged at the connection nodes of the upper radial cables and the upper cross cables, successively connecting the connection nodes of the upper radial cables and the upper cross cables to form a closed loop.

2. The double cable structure system combining the joint type and the ribbed ring type grid according to claim 1, characterized in that, The lower cable system includes a lower ring cable and lower radial cables; The lower ring cable is located in the middle area of the roof; The outer ends of the lower radial cables are connected to the outer boundary, and the inner ends are connected to the lower ring cable nodes, and the planar projection of the lower radial cables is consistent or tends to be consistent with the angular bisector direction of the planar projections of two adjacent sections of the lower ring cable.

3. The double-layer cable structure system combining the joint type and the ribbed ring type grid according to claim 2, wherein, The ring cable struts connect the upper ring cable nodes and the lower ring cable nodes; When the horizontal projections of the upper ring cable and the lower ring cable coincide, the ring cable struts are arranged vertically; When the horizontal projections of the upper ring cable and the lower ring cable do not coincide, the ring cable struts are arranged obliquely.

4. The double-layer cable structure system combining the joint type and the ribbed ring type grid according to claim 3, characterized in that, The crosswise cable system struts connect the upper cross cable nodes and the lower radial cable nodes, and the crosswise cable system struts are arranged vertically.

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