Chord support structure supported by carbon fiber cables

Abstract

A lower inhaul cable is composed of the carbon fiber cables, the carbon fiber cables have the advantages of being light in weight, high in tensile strength, small in linear expansion coefficient and good in corrosion resistance, the stress performance of the lower inhaul cable can be effectively improved, the service life of the lower inhaul cable can be effectively prolonged, the lower inhaul cable and an upper rigid structure form a unilateral tensioning matching structure, and therefore the tensile strength of the lower inhaul cable is improved. Tensioning prestress can be conveniently applied, and the stress performance and the structural stability of the chord supporting structure are improved.

Description

Technical Field

[0001] The invention relates to the technical field of chord structures, and in particular to a chord structure supported by carbon fiber cables. Background Art

[0002] In the construction of large-scale spatial structures such as stadiums and transportation hubs, chord-supported structures are often used as the structural form of their roofs. The chord-supported structure is usually composed of an upper rigid structure (such as a spatial grid shell, truss, etc.), a lower cable, and a middle vertical strut. By applying prestress to the lower cables, the stress and deformation of the upper rigid structure can be significantly improved.

[0003] A Chinese patent with publication number CN 210439143 U discloses a cable with a fork-ear structure, comprising a steel strand body and two anchoring structures installed at both ends of the steel strand body, wherein the anchoring structures include fork ears, an adjusting sleeve, an adjusting rod, an adjusting nut, a connecting sleeve and an anchor assembly for tensioning the cable.

[0004] A Chinese patent with publication number CN 110158834 A discloses a lower cable support node system for a tensioned structure, comprising a base plate and two struts; two prestressed cables pass through the base plate in parallel; the two struts are mirror-imaged at the top of the base plate, the bottoms of the two struts are close to and hingedly connected to the base plate, the pins are skewed and perpendicularly arranged with the prestressed cables, each strut has an angle of N° with the vertical plane, wherein 0<N<90; wherein the plane where the two struts are located is perpendicularly arranged with the two prestressed cables.

[0005] Furthermore, in the current chord-supported structure, the lower cables are often made of steel cables. Due to the high density of steel cables, when the structural span is large, the mass of a single steel cable is large, which increases the construction investment to a certain extent and limits the construction efficiency. In addition, the bearing capacity is prone to degradation, resulting in structural instability and low tensile strength of the existing chord-supported structure.

[0006] Therefore, how to effectively improve the stress-bearing performance of the chord-supported structure, increase the spanning capacity of the chord-supported structure, and ensure the structural stability of the chord-supported structure has become an urgent problem to be solved in this field. Summary of the invention

[0007] In view of the defects of the prior art, the object of the present invention is to provide a chord structure supported by carbon fiber cables with good force-bearing performance and spanning capacity and stable structure.

[0008] To achieve the above object, the cable-supported cable-strut structure provided by the present invention includes an upper rigid structure, an intermediate strut, and a lower cable. A plurality of lower cables are distributed below the upper rigid structure, and are respectively connected to the upper rigid structure at both ends, and form a single-sided tensioning cooperation structure with the upper rigid structure. The lower cables are composed of carbon fiber cables, and the intermediate struts are distributed between the upper rigid structure and the lower cables.

[0009] Further, the lower cable includes a carbon fiber cable body, and both ends of the carbon fiber cable body are respectively connected to anchors. The first anchor is connected to the upper rigid structure through a first fork ear assembly, and the second anchor is connected to the upper rigid structure through the cooperation of a tensioning assembly and a second fork ear assembly.

[0010] Further, the tensioning assembly includes an adjusting rod and an adjusting sleeve. The adjusting rod and the second fork ear assembly are respectively embedded in the adjusting sleeve and are configured to be in a threaded fit with the adjusting sleeve.

[0011] Further, middle ear plates are respectively provided at both ends of the upper rigid structure. Fixing grooves adapted to the middle ear plates are respectively provided in the first fork ear assembly and the second fork ear assembly, and fixing through holes for installing spherical plain bearings are also provided.

[0012] Further, cable clamps are distributed on the carbon fiber cable body. The cable clamps include a first clamping plate and a second clamping plate. The first clamping plate and the second clamping plate can enclose to form an accommodation cavity adapted to the carbon fiber cable body, and a single ear plate for cooperating with the intermediate strut is further provided on the first clamping plate.

[0013] Further, double ear plates adapted to the single ear plates are respectively provided at both ends of the intermediate strut.

[0014] Further, a plurality of single ear plates are annularly distributed on the first clamping plate and are adapted to the distribution structure of a plurality of intermediate struts.

[0015] Further, the intermediate strut is vertically distributed or distributed at an angle with the upper rigid structure and the lower cable.

[0016] In the cable-supported cable-strut structure provided by the present invention, the lower cable is composed of carbon fiber cables. The carbon fiber cables have the characteristics of light weight, high tensile strength, small linear expansion coefficient, and good corrosion resistance, which can effectively improve the mechanical properties and service life of the lower cable. The lower cable and the upper rigid structure form a single-sided tensioning cooperation structure, which is convenient for applying tension prestress and improving the mechanical properties and structural stability of the cable-strut structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 and Figure 2 is the overall structural schematic diagram of the cable-supported structure supported by carbon fiber provided by the present invention;

[0019] Figure 3 is the structural schematic diagram of the lower cable in the present invention;

[0020] Figure 4 and Figure 5 is the cooperation schematic diagram of the lower cable and the upper rigid structure in the present invention;

[0021] Figure 6 and Figure 7 is the structural schematic diagram of the cable clamp in the present invention;

[0022] Figure 8 is the cooperation schematic diagram of the lower cable and the middle strut in the present invention;

[0023] Figure 9 is the cooperation schematic diagram of the upper rigid structure and the middle strut in the present invention;

[0024] Figure 10 is the connection and cooperation structural schematic diagram of the middle strut in the present invention;

[0025] Figure 11 and Figure 12 is the distribution schematic diagram of the middle strut in the present invention;

[0026] Figure 13 is the overall structural schematic diagram of the cable-supported structure in the second embodiment of the present invention;

[0027] Figure 14 and Figure 15 is the structural schematic diagram of the cable clamp in the second embodiment of the present invention;

[0028] Reference numerals:

[0029] 1. Lower cable; 101. First lower cable; 102. Second lower cable; 11. Carbon fiber cable body; 12. First anchor; 13. First fork ear assembly; 131. Fixed groove; 132. Fixed through hole; 14. Second anchor; 15. Tensioning assembly; 151. Adjusting rod; 152. Adjusting sleeve; 16. Second fork ear assembly; 161. Extension rod; 17. Cable clamp; 171. First clamping plate; 172. Second clamping plate; 173. Placement cavity; 174. Single ear plate; 175. Third clamping plate; 176. Fourth clamping plate;

[0030] 2. Middle strut; 21. Double ear plate;

[0031] 3. Upper rigid structure; 31. Middle ear plate; 32. Spherical plain bearing. Detailed implementation manners

[0032] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below with reference to specific illustrations.

[0033] Embodiment 1

[0034] See Figure 1 , which shows an example of a cable-supported suspended structure supported by carbon fiber cables provided by the present invention.

[0035] As can be seen from the figure, the cable-supported suspended structure of this embodiment includes lower cables 1, intermediate struts 2 and upper rigid structures 3.

[0036] A number of lower cables 1 are distributed below the upper rigid structure 3, and both ends are respectively connected to the upper rigid structure 3 and form a single-sided tensioning cooperation structure with the upper rigid structure 3. The lower cables 1 are composed of carbon fiber cables. The intermediate struts 2 are distributed between the upper rigid structure 3 and the lower cables 1, which is convenient for applying tension prestress and improving the mechanical properties and structural stability of the cable-supported suspended structure. At the same time, based on the structural characteristics of the carbon fiber cables, the mechanical properties and service life of the lower cables can be effectively improved.

[0037] Combined with Figure 1 and Figure 2 , wherein, the upper rigid structure 3 can be configured into an arch shape or a circular arc shape according to the building structure form, and the lower cables 1 are configured into parallel distribution or circumferential distribution according to the distribution structure of the upper rigid structure 3, and are connected and cooperated with the upper rigid structure 3 to stably support the upper rigid structure 3.

[0038] Combined with Figure 3 , further, the lower cable 1 includes a carbon fiber cable body 11, and the carbon fiber cable body 11 is composed of a carbon fiber stranded cable and a flat cable in cooperation, which has the characteristics of light weight, high tensile strength, small linear expansion coefficient and good corrosion resistance, and can improve the tensile strength and service life of the lower cable 1, thereby improving the stability of the cable-supported suspended structure.

[0039] Both ends of the carbon fiber cable body 11 are respectively connected to anchors, and the first anchor 12 at one end is connected to the upper rigid structure 3 through the first fork ear assembly 13, and the second anchor 14 at the other end forms a single-sided tensioning cooperation with the upper rigid structure 3 through the tensioning assembly 15 and the second fork ear assembly 16, so as to facilitate the tensioning of the lower cable 1.

[0040] Combined with Figure 3 and Figure 4 , specifically, the tensioning assembly 15 is arranged between the second anchor 14 and the second fork ear assembly 16. The tensioning assembly 15 includes an adjusting rod 151 and an adjusting sleeve 152, and an extension rod 161 adapted to the adjusting sleeve 152 is formed at one end of the second fork ear assembly 16 that cooperates with the tensioning assembly 15.

[0041] In this way, one end of the adjusting rod 151 is connected to the second anchor 14, and the other end is embedded in the adjusting sleeve 152. Correspondingly, the extension rod 161 of the second fork ear assembly 16 is distributed opposite to the adjusting rod 15 and is also embedded in the adjusting sleeve 152. The adjusting rod 151 and the extension rod 161 are respectively configured to be in threaded fit with the adjusting sleeve 152, so that when the adjusting sleeve 152 rotates, the distribution distance between the extension rod 161 and the adjusting rod 15 can be adjusted through the threaded fit, thereby realizing the tensioning of the carbon fiber cable body 11.

[0042] Further, the end portions of the first fork ear assembly 13 and the second fork ear assembly 16 that cooperate with the upper rigid structure 3 are respectively provided with a fixing groove 131 and a fixing through hole 132 passing through the fixing groove 131, so that the first fork ear assembly 13 and the second fork ear assembly 16 can be respectively connected to the upper rigid structure 3.

[0043] Combined Figure 4 and Figure 5 , correspondingly, the two ends of the upper rigid structure 3 are respectively provided with middle ear plates 31 adapted to the fixing grooves 131, so that the middle ear plates 31 can be placed in the fixing grooves 131. A spherical plain bearing 32 is inserted into the fixing through hole 132, and the middle ear plate 31 can be connected to the fixing groove 131, thereby connecting the two ends of the upper rigid structure 3 to the carbon fiber cable body 11 respectively.

[0044] In this way, one end of the upper rigid structure 3 is connected to the carbon fiber cable body 11 through the cooperation of the middle ear plate 31 and the first fork ear assembly 13 to ensure the stability of the cable-strut structure. The other end of the upper rigid structure 3 is in unilateral tensioning fit with the carbon fiber cable body 11 through the cooperation of the middle ear plate 31 and the second fork ear assembly 16. By rotating the knob adjusting sleeve 152, the distribution distance between the extension rod 161 and the adjusting rod 15 can be adjusted, thereby realizing the unilateral tensioning of the carbon fiber cable body 11, enhancing the tensile strength of the lower cable 1, and improving the mechanical performance of the cable-strut structure.

[0045] Combined Figure 6 and Figure 7 , further, a number of cable clamps 17 for cooperating with the middle strut 2 are distributed on the carbon fiber cable body 11. The cable clamp 17 includes a first clamping plate 171 and a second clamping plate 172. The first clamping plate 171 and the second clamping plate 172 are symmetrically distributed and can enclose to form a placement cavity 173 adapted to the carbon fiber cable body 11, so that the first clamping plate 171 and the second clamping plate 172 can cooperate to clamp the carbon fiber cable body 11 and accommodate the carbon fiber cable body 11 in the placement cavity 173.

[0046] Here, the carbon fiber cable body 11 can be configured into a circular cross-section, a square cross-section, etc. according to the building form. Correspondingly, the placement cavity 173 is configured into a circular cross-section or a square cross-section adapted to the carbon fiber cable body 11 to ensure the stable cooperation between the cable clamp 17 and the carbon fiber cable body 11.

[0047] Further, a single ear plate 174 is also provided on the first clamping plate 171. At both ends of the middle strut 2, double ear plates 21 adapted to the single ear plate 174 are provided respectively. As Figure 8 shown, the middle strut 2 can be connected to the single ear plate 174 of the first clamping plate 171 through the double ear plates 21, so that the middle strut 2 is arranged on the carbon fiber cable body 11.

[0048] Combined with Figure 9 and Figure 10 , correspondingly, a number of middle ear plates 31 corresponding to the middle strut 2 are also distributed at the bottom of the upper rigid structure 3, so that the middle strut 2 can be connected to the middle ear plates 31 at the bottom of the upper rigid structure 3 through the double ear plates 21, and the middle strut 2 is distributed between the upper rigid structure 3 and the lower cable 1 to form a stable cable-strut structure.

[0049] As Figure 11 shown, in some embodiments, the middle strut 2 is vertically distributed with respect to the upper rigid structure 3 and the lower cable 1.

[0050] As Figure 12 shown, in some embodiments, the middle strut 2 can also be configured to be obliquely distributed at an angle with the upper rigid structure 3 and the lower cable 1 according to the building form. Correspondingly, a cable clamp 17 needs to be connected to a plurality of middle struts 2. Therefore, a number of single ear plates 174 are circumferentially distributed on the first clamping plate 171 and are adapted to the distribution structure of a number of middle struts 2. As Figure 6 shown, so that a plurality of middle struts 2 can be connected to the carbon fiber cable body 11 through the corresponding single ear plates 174.

[0051] Embodiment 2

[0052] On the basis of Embodiment 1, in order to improve the spanning ability and structural stability of the cable-strut structure, in this embodiment, the lower cable 1 includes a first lower cable 101 and a second lower cable 102 which are distributed at an angle, so that the first lower cable 101 and the second lower cable 102 cooperate with each other to enhance the supporting ability for the upper rigid structure 3.

[0053] Combined with Figure 13 , as a preferred setting scheme, the first lower cable 101 and the second lower cable 102 are composed of carbon fiber cables and are vertically distributed. The first lower cable 101 is distributed along the axial direction of the upper rigid structure 3 and is respectively connected to both ends of the upper rigid structure 3. The second lower cable 102 is distributed along the longitudinal direction of the upper rigid structure 3, and both ends are respectively connected to the first lower cable 101, so that the first lower cable 101 and the second lower cable 102 are in a grid distribution structure, which can effectively enhance the spanning ability of the cable-strut structure.

[0054] Furthermore, the middle strut 2 is distributed between the upper rigid structure 3 and the lower cable 1, and is preferably arranged at the connection node of the first lower cable 101 and the second lower cable 102, so that the middle strut 2 can cooperate with the first lower cable 101 and the second lower cable 102 to enhance the mechanical performance and structural stability of the cable-strut structure.

[0055] Combined Figure 14 , correspondingly, in this embodiment, in order to stably connect the middle strut 2, the first lower cable 101 and the second lower cable 102, the cable clamp 17 is configured as a two-way cable clamp, and a third clamping plate 175 and a fourth clamping plate 176 for connecting the second lower cable 102 are further provided at the bottom end of the second clamping plate 172.

[0056] Among them, the first clamping plate 171 and the second clamping plate 172 are symmetrically distributed and can enclose to form a first placement cavity adapted to the first lower cable 101, so that the first clamping plate 171 and the second clamping plate 172 can cooperate to clamp the first lower cable 101 and accommodate the first lower cable 101 in the first placement cavity.

[0057] Furthermore, the third clamping plate 175 is connected to the bottom end of the second clamping plate 172 and is distributed at an angle to the second clamping plate 172. Preferably, it is vertically distributed to adapt to the distribution structure of the first lower cable 101 and the second lower cable 102. The fourth clamping plate 176 is symmetrically distributed with the third clamping plate 175 and can enclose to form a second placement cavity adapted to the second lower cable 102, so that the third clamping plate 175 and the fourth clamping plate 176 can cooperate to clamp the second lower cable 102 and accommodate the second lower cable 102 in the second placement cavity.

[0058] Combined Figure 15 , a single-ear plate 174 for connecting the middle strut 2 is also provided on the first clamping plate 171. The number and distribution angle of the single-ear plates 174 are adapted to the middle strut 3. If multiple middle struts 2 are inclinedly distributed and one cable clamp 17 needs to be connected to multiple middle struts 2, multiple single-ear plates 174 and the first clamping plate 171 can be formed into a whole through processes such as welding and casting to adapt to the distribution quantity of the middle struts 2. For example, several single-ear plates 174 are circumferentially distributed on the first clamping plate 171 and are adapted to the distribution structure of several middle struts 2, so that multiple middle struts 2 can be connected to the cable clamp 17 through the corresponding single-ear plates 174.

[0059] In this way, the cable clamp 17 can synchronously connect the middle strut 2, the first lower cable 101 and the second lower cable 102 to form a stable cable-strut structure and ensure the spanning ability and mechanical performance of the cable-strut structure.

[0060] The cable-supported structure supported by carbon fiber thus formed uses the lower cables 1 formed by carbon fiber cable bodies 11 as the continuously tensioned members of the cable-supported structure, which can reduce the weight of the members, improve durability, and contribute to improving the mechanical properties. The carbon fiber cable bodies 11 and the upper rigid structure 3 form a single-sided tensioning structure, and the single-sided tensioning can be quickly achieved through the rotating adjusting sleeve, improving the stability of the overall structure.

[0061] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A cable-supported cable-strut structure, comprising an upper rigid structure, intermediate struts, and lower cables, characterized in that a number of lower cables are distributed below the upper rigid structure, with both ends respectively connected to the upper rigid structure and forming a single-sided tensioning cooperation structure with the upper rigid structure. The lower cables are composed of carbon fiber cables, and the intermediate struts are distributed between the upper rigid structure and the lower cables.

2. The cable-strut structure supported by carbon fiber cables according to claim 1, wherein The lower cable includes a carbon fiber cable body, with both ends of the carbon fiber cable body respectively connected to anchors. The first anchor is connected to the upper rigid structure through a first fork ear assembly, and the second anchor is connected to the upper rigid structure through the cooperation of a tensioning assembly and a second fork ear assembly.

3. The cable-strut structure supported by carbon fiber cables according to claim 2, characterized in that, The tensioning assembly includes an adjusting rod and an adjusting sleeve. The adjusting rod and the second fork ear assembly are respectively embedded in the adjusting sleeve and configured to be in threaded cooperation with the adjusting sleeve.

4. The cable-supported cable-truss structure according to claim 2, wherein Middle ear plates are respectively provided at both ends of the upper rigid structure. Fixing grooves adapted to the middle ear plates are respectively provided in the first fork ear assembly and the second fork ear assembly, and fixing through holes for installing spherical plain bearings are also provided.

5. The cable-supported cable-truss structure according to claim 2, wherein Cable clamps are distributed on the carbon fiber cable body. The cable clamp includes a first clamping plate and a second clamping plate. The first clamping plate and the second clamping plate can enclose to form an accommodation cavity adapted to the carbon fiber cable body, and a single ear plate for cooperating with the intermediate strut is also provided on the first clamping plate.

6. The cable-supported cable-truss structure according to claim 5, wherein Double ear plates adapted to the single ear plates are respectively provided at both ends of the intermediate strut.

7. The cable-strut structure supported by carbon fiber cables according to claim 6, wherein, A number of single ear plates are annularly distributed on the first clamping plate and are adapted to the distribution structure of a number of intermediate struts.

8. The cable-supported suspended structure supported by carbon fiber cables according to claim 1 or 7, characterized in that The intermediate struts are vertically distributed or distributed at an angle with the upper rigid structure and the lower cables.

Images