A composite cable structure system and its morphological analysis method

Abstract

The present invention relates to the technical field of structural design and analysis of building engineering, and in particular to a composite cable structure system and a morphological analysis method thereof. The system can form free and complex geometric surfaces and grids while retaining the lightness and transparency of the cable structure, thereby solving the problem that the existing cable structure system has great restrictions on architectural modeling and greatly broadening the application scope of the cable structure; the corresponding morphological analysis method is used to solve the initial state of the proposed composite cable structure system, and the prestress distribution under the target configuration that meets the architectural modeling requirements can be obtained, solving the core problem of the engineering application of the system.

Description

Technical Field

[0001] The invention relates to the technical field of structural design and analysis of building engineering, and in particular to a composite cable structure system and a morphological analysis method thereof. Background Art

[0002] Cable structure is a type of structural system widely used in large-space public buildings such as stadiums, exhibition halls, theaters, etc. It consists of cables that can only be subjected to tension and rods that can be subjected to both tension and compression. According to the different arrangements of components, it can be divided into single-layer cable net, cable truss structure, cable dome structure, etc. Since the cable is made of high-strength materials and is in a tensile state during the structural load-bearing process, it has high force efficiency and does not have component stability problems. Therefore, its cross-sectional size is much smaller than traditional concrete components and steel components, which can create a very light and transparent architectural effect.

[0003] Unlike rigid structures such as concrete structures and traditional steel structures, which rely on the material itself to provide structural stiffness and bearing capacity, cable structures are typical flexible structural systems that require the application of prestress to achieve a stable state and establish stiffness and bearing capacity. The geometric surfaces and grids that can be achieved after the cable structure is stretched are not arbitrary, but are directly related to factors such as the structural layout and the applied prestress. For example, a single-layer cable net can only be applied to surfaces with negative Gaussian curvature, and a cable truss can only form a relatively regular surface shape and structural layout. This feature requires that buildings using cable structures need to consider geometric feasibility more during the design process, and cannot obtain the same geometric flexibility as buildings using rigid structures, which limits the scope of application of cable structures to a certain extent.

[0004] There are three states of cable structures in the analysis and design: (1) zero state, i.e., a structural model established according to geometric principles and without calculation; (2) initial state, i.e., a structural equilibrium state calculated on the basis of the zero state and taking into account factors such as the self-weight of the structure; (3) load state, i.e., a structural equilibrium state calculated by applying subsequent loads and actions on the basis of the initial state. The object of morphological analysis is the initial state of the cable structure that meets the requirements of architectural design, i.e., the target requirements, including the equilibrium configuration of the structure and the corresponding prestress. After obtaining the initial state of the cable structure, on the one hand, the structural response under various loads and actions can be calculated on this basis, i.e., load state analysis, to complete the structural design; on the other hand, the construction analysis of the cable structure can be carried out with the initial state as the target, and a construction plan can be formulated. Therefore, morphological analysis is in a position of connecting the past and the future in the entire construction process of the cable structure, and is the core work of the cable structure from design to construction. In current theoretical research and engineering practice, there is no universal morphological analysis method for different types of cable structure systems, and corresponding analysis strategies need to be adopted according to the characteristics of each type of cable structure. Therefore, for each new type of cable structure system, proposing an applicable morphological analysis method is an important prerequisite for verifying its feasibility and realizing engineering applications.

[0005] 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

[0006] The purpose of the present invention is to provide a composite cable structure system and a morphological analysis method thereof. The system can form free and complex geometric surfaces and grids while retaining the lightness and transparency of the cable structure, thereby solving the problem that the existing cable structure system has great restrictions on architectural modeling and greatly broadening the application scope of the cable structure; the corresponding morphological analysis method is used to solve the initial state of the proposed composite cable structure system, and the prestress distribution under the target configuration that meets the architectural modeling requirements can be obtained, solving the core problem of the engineering application of the system.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a laminated cable structure system, which comprises: a load-bearing structure, a shaping structure and a connecting member arranged in a laminated manner;

[0009] The bearing structure is located below the composite cable structure system, providing the entire system with the rigidity and bearing capacity required to resist various external loads and effects;

[0010] The modeling structure is located above the superimposed cable structure system, and mainly plays the role of constructing the required architectural shape, and can also coordinate the load-bearing structure and improve the integrity of the structure;

[0011] The connecting member is located between the modeling structure and the bearing structure. The connecting member is arranged in the vertical direction, and its upper end and lower end are respectively connected to the modeling structure node and the bearing structure node, connecting the modeling structure and the bearing structure, thereby forming an overall cable structure system.

[0012] As a further technical solution, the load-bearing structure can adopt any one of the cable structures of cable truss, cable dome and single-layer cable net. When the cable truss structure is adopted, it is composed of hoop cables, radial cables, struts, slings and other components; when the cable dome structure is adopted, it is composed of radial cables, hoop cables, oblique cables, struts and other components; when the single-layer cable net structure is adopted, it is composed of load-bearing cables, stabilizing cables and other components.

[0013] Specifically, the bearing structure adopts a spoke-type cable truss structure, which includes: a ring cable, a radial cable connected to the ring cable, and a strut or a sling connected to the radial cable.

[0014] For example, the hoop rope is divided into two layers, an upper layer and a lower layer; a plurality of groups of radial ropes are arranged around the two layers of hoop ropes, one radial rope in each group of radial ropes is connected to the upper hoop rope, the other radial rope is connected to the lower hoop rope, and the two radial ropes are arranged along the radial extension of the hoop rope; the support rod is connected between the two radial ropes.

[0015] Specifically, the bearing structure adopts a cable dome structure, which includes hoop cables, radial cables, struts, and oblique cables; the hoop cables and radial cables are connected by struts and oblique cables.

[0016] For example, a series of the ring ropes are concentrically arranged, and the diameters of the series of the ring ropes decrease from the outside to the inside; a plurality of radial ropes are arranged around the series of the ring ropes; the radial ropes are connected to the ring ropes by struts and oblique ropes.

[0017] Specifically, the bearing structure adopts a single-layer cable net structure, which includes load-bearing cables and stabilizing cables arranged longitudinally and transversely.

[0018] As a further technical solution, the modeling structure is a single-layer structure, adopts any one of the curved surface forms of positive Gaussian curvature, negative Gaussian curvature, zero Gaussian curvature, and free-form surface, and adopts any one of the mesh forms of triangle, orthogonal quadrilateral, rhombus, rib ring type, and Kiewitt type. Of course, the above-mentioned mesh forms are specific embodiments of the present application, which are not limitations. Ordinary technicians in this field can adopt other mesh forms, and can also replace some or all of the technical features therein with equivalents, and flexibly set them according to actual needs.

[0019] As a further technical solution, the modeling structure is entirely composed of cables, or is a combination of cables and steel components.

[0020] As a further technical solution, the arrangement of the bearing structure and the modeling structure matches the architectural modeling requirements and can be applied to closed buildings such as gymnasiums, exhibition halls, theaters, etc., and can also be applied to open buildings such as stadiums. The proposed composite cable structure system can use rigid materials such as corrugated steel plates and glass as enclosures, and can also use flexible materials such as membranes as enclosures.

[0021] As a further technical solution, the connecting member is a cable or a steel member.

[0022] As a further technical solution, both the bearing structure and the modeling structure need to be prestressed; at the node where the modeling structure is connected to the connecting member, the prestress only needs to meet the equilibrium conditions in the x and y directions, and the z-direction resultant force of the prestress and the self-weight of the modeling structure are balanced by the corresponding connecting member; the prestress of the bearing structure in the initial state is balanced with the internal force of the connecting member and the self-weight of the structure. Through this force mechanism, the entire cable structure system reaches a stable equilibrium state in the target configuration.

[0023] In a second aspect, the present invention further provides a morphological analysis method for a composite cable structure system, comprising the following steps:

[0024] S1. Establish a separate modeling structure model to constrain the z-direction degrees of freedom of all nodes connected to the connection components;

[0025] S2. Considering the deadweight of the modeling structure and other additional loads that need to be considered in the initial state, the individual modeling structure is subjected to morphological analysis to obtain the equilibrium state of the modeling structure that meets the target configuration;

[0026] S3, extract the z-direction support reaction {R}={r1…r i … r n}, where r i is the z-direction support reaction of the node connected to the i-th connecting member, and n is the number of connecting members;

[0027] S4, reverse the sign of each support reaction force in step S3, and add it to the corresponding connecting member to obtain {P} = {p1 ... p i … p n}, where p i =-r i -w i , w i is the self-weight of the ith connecting member;

[0028] S5, applying {P} to corresponding nodes of the load-bearing structure;

[0029] S6, considering the effect of {P}, the deadweight of the bearing structure and other additional loads that need to be considered in the initial state, perform morphological analysis on the individual bearing structure, so that in the equilibrium configuration of the bearing structure, the x and y coordinates of the nodes connected to the connecting member are equal to the x and y coordinates of the corresponding nodes of the equilibrium state of the modeling structure in step S2;

[0030] S7. Establish an overall model of the cable structure system including the bearing structure, the modeling structure and the connecting components, and use the modeling structure and the bearing structure prestress obtained in step S2 and step S6 to obtain the initial state of the overall cable structure system.

[0031] By adopting the above technical solution, the present invention has the following beneficial effects:

[0032] 1. The composite cable structure system proposed in the present invention is composed of three parts: a load-bearing structure, a modeling structure, and a connecting member. On the one hand, in a balanced state, the prestress of the modeling structure satisfies the equilibrium conditions in the x and y directions, and can form a grid form that meets the architectural requirements; on the other hand, by transferring the z-direction component of the prestress of the modeling structure to the lower load-bearing structure via the connecting member, and achieving balance with the prestress of the load-bearing structure, the modeling structure can reach a balanced state in the target configuration, and the target configuration can break through the restrictions of conventional cable structures on architectural modeling, and adopt curved surface forms such as positive Gaussian curvature, negative Gaussian curvature, and zero Gaussian curvature according to architectural requirements. Therefore, the proposed composite cable structure system can achieve a more free and complex architectural modeling than conventional cable structures while maintaining the lightness and transparency of conventional cable structures, greatly broadening the application scope of cable structures.

[0033] 2. Each component of the composite cable structure system proposed by the present invention has a clear function: the arrangement of the modeling structure mainly considers the realization of architectural effects and other factors without violating the basic mechanical principles; the arrangement of the bearing structure mainly considers the realization of efficient force and other factors without affecting the shape of the modeling structure. Therefore, the system can take into account both the realization of architectural effects and good mechanical properties.

[0034] 3. The morphological analysis method of the composite cable structure system proposed in the present invention performs morphological analysis of the modeling structure and the load-bearing structure respectively, and establishes a connection between the two through connecting components, so that the entire cable structure system can achieve balance in the target configuration that meets the architectural modeling requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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.

[0036] Figure 1 A schematic diagram of a laminated cable structure system provided in Example 1 of the present invention;

[0037] Figure 2 An exploded view of a composite cable structure system provided in Example 1 of the present invention;

[0038] Figure 3 A detailed exploded view of the composite cable structure system provided in Example 1 of the present invention;

[0039] Figure 4 A schematic diagram of a laminated cable structure system provided in Embodiment 2 of the present invention;

[0040] Figure 5 An exploded view of a composite cable structure system provided in Example 2 of the present invention;

[0041] Figure 6 A detailed exploded view of the composite cable structure system provided in the second embodiment of the present invention;

[0042] Figure 7 A schematic diagram of a laminated cable structure system provided in Embodiment 3 of the present invention;

[0043] Figure 8 A side view of a laminated cable structure system provided in Embodiment 3 of the present invention;

[0044] Fig. 9 An exploded view of a composite cable structure system provided in Embodiment 3 of the present invention;

[0045] Fig.10 A detailed exploded diagram of the composite cable structure system provided in the third embodiment of the present invention;

[0046] Fig.11 A schematic diagram of a laminated cable structure system provided in Embodiment 4 of the present invention;

[0047] Fig.12 A side view of a composite cable structure system provided in Embodiment 4 of the present invention;

[0048] Fig.13 An exploded view of a composite cable structure system provided in Example 4 of the present invention;

[0049] Fig.14A detailed exploded diagram of the composite cable structure system provided in the fourth embodiment of the present invention;

[0050] Fig.15 A schematic diagram of a laminated cable structure system provided in Embodiment 5 of the present invention;

[0051] Fig.16 A side view of a composite cable structure system provided in Embodiment 5 of the present invention;

[0052] Fig.17 An exploded view of a composite cable structure system provided in Embodiment 5 of the present invention;

[0053] Fig.18 A detailed exploded diagram of the composite cable structure system provided in Example 5 of the present invention;

[0054] Fig.19 A flow chart of the morphological analysis method of the composite cable structure system proposed by the present invention;

[0055] Fig. 20 This is a schematic diagram of the morphological analysis process of the composite cable structure system proposed in the present invention.

[0056] Among them: 001 is the bearing structure, 002 is the modeling structure, 003 is the connecting member, 101 is the ring cable, 102 is the radial cable, 103 is the strut, 104 is the bearing structure node, 105 is the inclined cable, 106 is the load-bearing cable, 107 is the stabilizing cable, 201 is the modeling structure grid, 202 is the cable member, 203 is the steel member, 204 is the modeling structure node, 301 is the upper end point of the connecting member, and 302 is the lower end point of the connecting member. DETAILED DESCRIPTION

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] Embodiment 1

[0062] In this embodiment, Figure 1-Figure 3 The present invention is described by taking the superimposed cable structure system of saddle-shaped curved surface and diamond-shaped grid as an example (the overall structure shown in A in the figure).

[0063] Combination Figures 1 to 3 As shown, Figure 1 Shown is a schematic diagram of the laminated cable structure system A provided in this embodiment, the upper surface of which is a saddle-shaped curved surface composed of a series of diamond-shaped grids. Figure 2 The composition of the composite cable structure system A is illustrated in the form of an exploded diagram, which is composed of a bearing structure 001, a shaping structure 002 and a connecting member 003. In order to more clearly show the composition of the composite cable structure system A, Figure 3 A detailed decomposition diagram of the system is given.

[0064] The bearing structure 001 is located below the composite cable structure system A, providing the entire system with the rigidity and bearing capacity required to resist various external loads and effects. The bearing structure 001 is a spoke-type cable truss structure with an opening in the middle, which is composed of two layers of ring cables 101 and a series of radial cables 102 and struts 103.

[0065] The modeling structure 002 is located above the composite cable structure system A, and mainly plays the role of constructing the required architectural shape. It can also coordinate the force of the bearing structure 001 and improve the structural integrity. The modeling structure 002 is a single-layer structure, using a saddle-shaped surface with negative Gaussian curvature; at the same time, according to the requirements of architectural shape, the modeling structure grid 201 uses a diamond grid. In this embodiment, the modeling structure 002 is entirely composed of cable components 202.

[0066] The connecting member 003 is located between the modeling structure 002 and the bearing structure 001, connecting the modeling structure 002 and the bearing structure 001, thereby forming an integral cable structure system A. The connecting member 003 is arranged in the vertical direction, and the upper end point 301 of the connecting member and the lower end point 302 of the connecting member are respectively connected to the modeling structure node 204 and the bearing structure node 104. In this embodiment, the connecting member 003 is entirely made of steel.

[0067] The composite cable structure system A provided in this embodiment is suitable for open buildings such as stadiums.

[0068] Both the bearing structure 001 and the modeling structure 002 need to be prestressed. For the modeling structure 002 in the target configuration, at the modeling structure node 204 where it is connected to the connecting member 003, the prestress only needs to meet the equilibrium conditions in the x and y directions, and the z-direction resultant force of the prestress and the deadweight of the modeling structure 002 are balanced by the corresponding internal force of the connecting member 003; for the bearing structure 001, its prestress in the initial state is balanced with the internal force of the connecting member 003 and the deadweight of the entire structural system. Through this force balance mechanism, the entire cable structure system A reaches a stable equilibrium state in the target configuration.

[0069] Embodiment 2

[0070] In this embodiment, Figure 4-Figure 6 The present invention is described by taking a superimposed cable structure system of a saddle-shaped curved surface and a spatial triangular grid as an example (the overall structure shown in B in the figure).

[0071] Combination Figures 4 to 6 As shown, Figure 4 Shown is a schematic diagram of the composite cable structure system B provided in this embodiment, whose upper surface is a saddle-shaped curved surface composed of a series of spatial triangular grids, two sides of each spatial triangle are straight sides made of cables, and the third side is an arc side made of steel arches. Figure 5 The composition of the composite cable structure system B is illustrated in the form of an exploded diagram, which is composed of a bearing structure 001, a shaping structure 002 and a connecting member 003. In order to more clearly show the composition of the composite cable structure system B, Figure 6 A detailed decomposition diagram of the system is given.

[0072] The bearing structure 001 is located below the composite cable structure system B, providing the entire system with the rigidity and bearing capacity required to resist various external loads and effects. The bearing structure 001 is a spoke-type cable truss structure with an opening in the middle, which is composed of two layers of ring cables 101 and a series of radial cables 102 and struts 103.

[0073] The modeling structure 002 is located above the composite cable structure system B, and mainly plays the role of constructing the required architectural shape. It can also coordinate the force of the bearing structure 001 and improve the structural integrity. The modeling structure 002 is a single-layer structure, which adopts a saddle-shaped surface with negative Gaussian curvature; at the same time, according to the requirements of architectural modeling, the modeling structure grid 201 is a spatial triangular grid, and each modeling structure grid 201 is composed of two cable components 202 and a steel component 203 formed by an arc-shaped steel arch.

[0074] The connecting member 003 is located between the modeling structure 002 and the bearing structure 001, connecting the modeling structure 002 and the bearing structure 001, thereby forming an integral cable structure system B. The connecting member 003 is arranged in the vertical direction, and the upper end point 301 of the connecting member and the lower end point 302 of the connecting member are respectively connected to the modeling structure node 204 and the bearing structure node 104. In this embodiment, the connecting member 003 is entirely made of steel.

[0075] The composite cable structure system B provided in this embodiment is suitable for open buildings such as stadiums.

[0076] Both the bearing structure 001 and the modeling structure 002 need to be prestressed. For the modeling structure 002 in the target configuration, at the modeling structure node 204 where it is connected to the connecting member 003, the prestress of the cable member 202 only needs to meet the equilibrium conditions in the x and y directions, and the z-direction resultant force of the prestress and the deadweight of the modeling structure 002 are balanced by the corresponding internal force of the connecting member 003; for the bearing structure 001, its prestress in the initial state is balanced with the internal force of the connecting member 003 and the deadweight of the entire structural system. Through this force balance mechanism, the entire cable structure system B reaches a stable equilibrium state in the target configuration.

[0077] Embodiment 3

[0078] In this embodiment, Figure 7-10 The present invention is explained by taking a superimposed cable structure system of a slightly convex surface and a rib-ring grid as an example (the overall structure shown in C in the figure).

[0079] Combination Figures 7 to 10 As shown, Figure 7 FIG. 1 is a schematic diagram of a laminated cable structure system C provided in this embodiment. Figure 8 It is a side view of the composite cable structure system C, whose upper surface is a slightly convex positive Gaussian curvature surface and adopts a rib-ring grid layout. Fig. 9 The composition of the composite cable structure system C is illustrated in the form of an exploded diagram, which is composed of a bearing structure 001, a shaping structure 002 and a connecting member 003. In order to more clearly show the composition of the composite cable structure system C, Fig.10 A detailed decomposition diagram of the system is given.

[0080] The bearing structure 001 is located below the composite cable structure system C, providing the entire system with the rigidity and bearing capacity required to resist various external loads and effects. The bearing structure 001 is a Geiger-type cable dome structure with an opening in the middle, which is composed of a series of ring cables 101, radial cables 102, struts 103, and oblique cables 105.

[0081] The modeling structure 002 is located above the composite cable structure system C, and mainly plays the role of constructing the required architectural shape. It can also coordinate the force of the bearing structure 001 and improve the integrity of the structure. The modeling structure 002 is a single-layer structure, which adopts a slightly convex positive Gaussian curvature surface; at the same time, according to the requirements of architectural shape, the modeling structure grid 201 adopts a rib ring grid. In this embodiment, the modeling structure 002 is entirely composed of cable components 202.

[0082] The connecting member 003 is located between the modeling structure 002 and the bearing structure 001, connecting the modeling structure 002 and the bearing structure 001, thereby forming an integral cable structure system C. The connecting member 003 is arranged in the vertical direction, and the upper end point 301 of the connecting member and the lower end point 302 of the connecting member are respectively connected to the modeling structure node 204 and the bearing structure node 104. In this embodiment, the connecting member 003 is entirely made of steel.

[0083] The composite cable structure system C provided in this embodiment is suitable for closed or open buildings such as stadiums, exhibition halls, and theaters.

[0084] Both the bearing structure 001 and the modeling structure 002 need to be prestressed. For the modeling structure 002 in the target configuration, at the modeling structure node 204 where it is connected to the connecting member 003, the prestress only needs to meet the equilibrium conditions in the x and y directions, and the z-direction resultant force of the prestress and the self-weight of the modeling structure 002 are balanced by the corresponding internal force of the connecting member 003; for the bearing structure 001, its prestress in the initial state is balanced with the internal force of the connecting member 003 and the self-weight of the entire structural system. Through this force balance mechanism, the entire cable structure system C reaches a stable equilibrium state in the target configuration.

[0085] Embodiment 4

[0086] In this embodiment, Figure 11-Figure 14 The present invention is described by taking a superimposed cable structure system of a slightly concave surface and a Kiewitt-type grid as an example (the overall structure shown as D in the figure).

[0087] Combination Figures 11 to 14 As shown, Fig.11 FIG. 1 is a schematic diagram of a composite cable structure system D provided in this embodiment. Fig.12It is a side view of the composite cable structure system D, whose upper surface is a slightly concave positive Gaussian curvature surface, and adopts a Kiewitt-type grid. Fig.13 The composition of the composite cable structure system D is illustrated in the form of an exploded diagram, which is composed of a bearing structure 001, a shaping structure 002 and a connecting member 003. In order to more clearly show the composition of the composite cable structure system D, Fig.14 A detailed decomposition diagram of the system is given.

[0088] The bearing structure 001 is located below the composite cable structure system D, providing the entire system with the rigidity and bearing capacity required to resist various external loads and effects. The bearing structure 001 is a closed Kiewitt type cable dome structure, which is composed of a series of ring cables 101, radial cables 102, struts 103, and oblique cables 105.

[0089] The modeling structure 002 is located above the superimposed cable structure system D, and mainly plays the role of constructing the required architectural shape. At the same time, it can also coordinate the force of the bearing structure 001 and improve the integrity of the structure. The modeling structure 002 is a single-layer structure, which adopts a slightly concave positive Gaussian curvature surface; at the same time, according to the requirements of architectural modeling, the modeling structure grid 201 adopts a Kiewitt type grid. In this embodiment, the modeling structure 002 is entirely composed of cable components 202.

[0090] The connecting member 003 is located between the modeling structure 002 and the bearing structure 001, connecting the modeling structure 002 and the bearing structure 001, thereby forming an integral cable structure system D. The connecting member 003 is arranged in the vertical direction, and the upper end point 301 of the connecting member and the lower end point 302 of the connecting member are respectively connected to the modeling structure node 204 and the bearing structure node 104. In this embodiment, the connecting members 003 are all cable members.

[0091] The composite cable structure system D provided in this embodiment is suitable for closed or open buildings such as stadiums, exhibition halls, theaters, etc.

[0092] Prestress needs to be applied to both the bearing structure 001 and the modeling structure 002. For the modeling structure 002 in the target configuration, at the modeling structure node 204 where it is connected to the connecting member 003, the prestress only needs to meet the equilibrium conditions in the x and y directions, and the z-direction resultant force of the prestress and the deadweight of the modeling structure 002 are balanced by the corresponding internal force of the connecting member 003; for the bearing structure 001, its prestress in the initial state is balanced with the internal force of the connecting member 003 and the deadweight of the entire structural system. Through this force balance mechanism, the entire cable structure system D reaches a stable equilibrium state in the target configuration.

[0093] Embodiment 5

[0094] In this embodiment, Figure 15-18 The present invention is explained by taking the superimposed cable structure system of wavy free-form surface and orthogonal quadrilateral grid as an example (the overall structure shown in E in the figure).

[0095] Combination Figures 15 to 18 As shown, Fig.15 The figure shows a schematic diagram of the laminated cable structure system E provided in this embodiment. Fig.16 It is a side view of the composite cable structure system E, whose upper surface is a wavy free-form surface using an orthogonal quadrilateral grid. Fig.17 The composition of the composite cable structure system E is illustrated in the form of an exploded diagram, which is composed of a bearing structure 001, a shaping structure 002 and a connecting member 003. In order to more clearly show the composition of the composite cable structure system E, Fig.18 A detailed decomposition diagram of the system is given.

[0096] The bearing structure 001 is located below the composite cable structure system E, providing the entire system with the rigidity and bearing capacity required to resist various external loads and effects. The bearing structure 001 is a closed single-layer cable net structure, which is composed of a series of load-bearing cables 106 and stabilizing cables 107.

[0097] The modeling structure 002 is located above the superimposed cable structure system E, and mainly plays the role of constructing the required architectural shape. At the same time, it can also coordinate the force of the bearing structure 001 and improve the integrity of the structure. The modeling structure 002 is a single-layer structure, which adopts a wavy free-form surface; at the same time, according to the requirements of architectural modeling, the modeling structure grid 201 adopts an orthogonal quadrilateral grid. In this embodiment, the modeling structure 002 is entirely composed of cable components 202.

[0098] The connecting member 003 is located between the modeling structure 002 and the bearing structure 001, connecting the modeling structure 002 and the bearing structure 001, thereby forming an integral cable structure system E. The connecting member 003 is arranged in the vertical direction, and the upper end point 301 of the connecting member and the lower end point 302 of the connecting member are respectively connected to the modeling structure node 204 and the bearing structure node 104. In this embodiment, according to different stress conditions, part of the connecting member 003 is a cable member, and part of it is a steel member.

[0099] The composite cable structure system E provided in this embodiment is suitable for closed buildings such as gymnasiums, exhibition halls, theaters, etc.

[0100] Prestress needs to be applied to both the bearing structure 001 and the modeling structure 002. For the modeling structure 002 in the target configuration, at the modeling structure node 204 where it is connected to the connecting member 003, the prestress only needs to meet the equilibrium conditions in the x and y directions, and the z-direction resultant force of the prestress and the deadweight of the modeling structure 002 are balanced by the corresponding internal force of the connecting member 003; for the bearing structure 001, its prestress in the initial state is balanced with the internal force of the connecting member 003 and the deadweight of the entire structural system. Through this force balance mechanism, the entire cable structure system E reaches a stable equilibrium state in the target configuration.

[0101] Embodiment 6

[0102] In this embodiment, Fig.19 and Fig. 20 The figure shows a morphological analysis method applicable to the composite cable structure system proposed by the present invention, comprising the following steps:

[0103] S1. Establish a separate model of the modeling structure 002, and constrain the z-direction degrees of freedom of all nodes connected to the connection component 003, i.e., the modeling structure nodes 204;

[0104] S2. Considering the self-weight of the modeling structure 002 and other additional loads that need to be considered in the initial state, the force density method and other methods are used to perform morphological analysis on the individual modeling structure 002 to obtain the equilibrium state of the modeling structure 002 that meets the target configuration;

[0105] S3, extract the z-direction support reaction force {R}={r1…r i … r n}, where r i is the z-direction support reaction force of the node connected to the i-th connecting member 003, and n is the number of connecting members 003;

[0106] S4, reverse the sign of each support reaction force in step S3, and add it to the corresponding connection component 003 to obtain {P} = {p1 ... p i … p n}, where p i =-r i -w i , w i is the deadweight of the i-th connecting component 003;

[0107] S5, applying {P} to the corresponding load-bearing structure node 104 of the load-bearing structure 001;

[0108] S6. Considering the effect of {P}, the deadweight of the bearing structure 001 and other additional loads that need to be considered in the initial state, a morphological analysis is performed on the separate bearing structure 001, so that in the equilibrium configuration of the bearing structure 001, the x and y coordinates of the nodes connected to the connecting member 003 are equal to the x and y coordinates of the corresponding nodes of the modeling structure 002 in the equilibrium state in step S2;

[0109] S7. Establish an overall model of the cable structure system including the bearing structure 001, the modeling structure 002 and the connecting member 003, and use the prestress of the modeling structure 002 and the bearing structure 001 obtained in step S2 and step S6 to obtain the initial state of the overall cable structure system.

[0110] In summary, by adopting the technical solutions in the above embodiments, the present invention has the following advantages:

[0111] 1. The composite cable structure system proposed in the present invention is composed of three parts: a load-bearing structure, a modeling structure, and a connecting member. On the one hand, in a balanced state, the prestress of the modeling structure satisfies the equilibrium conditions in the x and y directions, and can form a grid form that meets the architectural requirements; on the other hand, by transferring the z-direction component of the prestress of the modeling structure to the lower load-bearing structure via the connecting member, and achieving balance with the prestress of the load-bearing structure, the modeling structure can reach a balanced state in the target configuration, and the target configuration can break through the restrictions of conventional cable structures on architectural modeling, and adopt curved surface forms such as positive Gaussian curvature, negative Gaussian curvature, and zero Gaussian curvature according to architectural requirements. Therefore, the proposed composite cable structure system can achieve a more free and complex architectural modeling than conventional cable structures while maintaining the lightness and transparency of conventional cable structures, greatly broadening the application scope of cable structures.

[0112] 2. Each component of the composite cable structure system proposed by the present invention has a clear function: the arrangement of the modeling structure mainly considers the realization of architectural effects and other factors without violating the basic mechanical principles; the arrangement of the bearing structure mainly considers the realization of efficient force and other factors without affecting the shape of the modeling structure. Therefore, the system can take into account both the realization of architectural effects and good mechanical properties.

[0113] 3. The morphological analysis method of the composite cable structure system proposed in the present invention performs morphological analysis of the modeling structure and the load-bearing structure respectively, and establishes a connection between the two through connecting components, so that the entire cable structure system can achieve balance in the target configuration that meets the architectural modeling requirements.

[0114] 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 composite cable structure system, characterized in that: include: The load-bearing structure, modeling structure and connecting components are arranged in a stacked manner; The bearing structure is located below the superimposed cable structure system; The modeling structure is located above the superimposed cable structure system; The connecting member is located between the modeling structure and the bearing structure, and is arranged in the vertical direction, with the upper end and the lower end thereof being connected to the nodes of the modeling structure and the nodes of the bearing structure respectively; The bearing structure and the shaping structure both need to be prestressed; the shaping structure only needs to be prestressed at the nodes where it is connected to the connecting components. x , y The direction satisfies the equilibrium condition, the prestress z The combined force and the deadweight of the structure are balanced by the corresponding connecting components; The prestress of the bearing structure in the initial state is balanced with the internal force of the connecting components and the deadweight of the structure; The modeling structure is entirely composed of cables, or is composed of cables and steel components; The connecting member is a cable or a steel member.

2. The laminated cable structure system according to claim 1, characterized in that: The bearing structure can adopt any cable structure form of a cable truss, a cable dome, or a single-layer cable net.

3. The laminated cable structure system according to claim 2, characterized in that: The bearing structure adopts a spoke-type cable truss structure, which includes: a ring cable, a radial cable connected to the ring cable, and a strut or a sling connected to the radial cable.

4. The laminated cable structure system according to claim 2, characterized in that: The bearing structure adopts a cable dome structure, which includes ring cables, radial cables, struts, and oblique cables; the ring cables and radial cables are connected by struts and oblique cables.

5. The laminated cable structure system according to claim 2, characterized in that: The bearing structure adopts a single-layer cable net structure, which includes load-bearing cables and stabilizing cables arranged vertically and horizontally.

6. The laminated cable structure system according to claim 1, characterized in that: The modeling structure is a single-layer structure, adopts any surface form of positive Gaussian curvature, negative Gaussian curvature, zero Gaussian curvature, and free surface, and adopts any grid form of triangle, orthogonal quadrilateral, rhombus, rib ring type, and Kiewitt type.

7. A morphological analysis method for the composite cable structure system according to any one of claims 1 to 6, characterized in that: The steps include: S1. Establish a separate structural model to constrain all nodes connected to the connection components. z Towards freedom; S2. Considering the deadweight of the modeling structure and other additional loads that need to be considered in the initial state, the individual modeling structure is subjected to morphological analysis to obtain the equilibrium state of the modeling structure that meets the target configuration; S3, extracting all nodes connected to the connection components in the equilibrium state of the modeling structure in step S2 z Reaction force to support R }={ r 1 … r i … r n },in r i For the i The nodes connected by the connection components z Reaction force to the support, n is the number of connected components; S4, reverse the sign of each support reaction force in step S3, and add it to the corresponding connecting member to obtain { P }={ p 1 … p i … p n },in p i =- r i - w i , w i For the i The deadweight of the connected components; S5. P } applied to the corresponding nodes of the load-bearing structure; S6. Consider { P }, the deadweight of the bearing structure and other additional loads that need to be considered in the initial state, and perform morphological analysis on the individual bearing structure to make the equilibrium state of the bearing structure consistent with the nodes connected to the connecting components. x , y The coordinates are equal to the corresponding nodes of the modeling structure equilibrium state in step S2 x , y coordinate; S7. Establish an overall model of the cable structure system including the bearing structure, the modeling structure and the connecting components, and use the modeling structure and the bearing structure prestress obtained in step S2 and step S6 to obtain the initial state of the overall cable structure system.

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