Truss structure and cable member tensioning method

Abstract

The present application relates to the technical fields of building structure, and discloses a truss structure and a cable member tensioning method, which comprises a truss body arranged in an arc shape, a plurality of arc-shaped surrounding rods and a plurality of web member structures connected and arranged between the arc-shaped surrounding rods, the arc-shaped surrounding rods arranged on the inner side of the truss body are inner chords, two cable nodes are arranged on the inner chords at intervals, a cable structure is arranged in tension on the two cable nodes, a plurality of strut structures are connected and arranged on the inner chords between the cable structure and the two cable nodes, are arranged vertically and are distributed at intervals along the length direction of the cable structure, the cable node comprises a node body connected and arranged on the inner chord, an opening is arranged on the outer wall of the node body, an anchoring structure penetrates through the opening in the lateral direction and is connected and arranged with the node body, one end of the anchoring structure is connected and arranged in tension with the cable structure, and a reinforcing structure is connected and arranged between the node body and the anchoring structure and / or between the node body and the inner chord.

Description

Technical Field

[0001] This invention relates to the field of building structure technology, specifically to a truss structure and a method for tensioning cables. Background Technology

[0002] Currently, in the field of building structure technology, cable arch truss structure technology is developing rapidly and its application scenarios are becoming increasingly widespread, such as bridges, stadiums, industrial plants, and silos, and it has good mechanical properties.

[0003] Cable arch truss structures are typically composed of cables, web members, and a metal truss main body. They can convert bending moments into axial forces in the chords. Combined with the tension of the cables or the support of the web members, they have good structural stability and can effectively improve the overall stiffness and load-bearing capacity of the structure.

[0004] However, in such truss structures, the structural stress is high and the stability is poor at the connection points between the cables and the main metal truss. This requires connection structures with larger cross-sections or volumes to ensure stability, which increases the amount of metal used and the cost. Summary of the Invention

[0005] In view of this, the present invention provides a truss structure and a cable tensioning method to solve the problem of high material consumption and high cost of truss structures.

[0006] This invention provides a truss structure, comprising: a truss body, arched in shape, including a plurality of arc-shaped retaining members and a plurality of web members connected between the arc-shaped retaining members; the arc-shaped retaining members on the inner side of the truss body are inner chord members, and two cable nodes spaced apart are provided on the inner chord members; a cable structure tensioned between the two cable nodes; a plurality of strut structures connected between the cable structure and the two cable nodes, arranged vertically and spaced apart along the length of the cable structure; each cable node includes: a node body connected to the inner chord member, with an opening on the outer wall of the node body; an anchoring structure passing laterally through the opening and connected to the node body, the anchoring structure being tensioned to one end of the cable structure; and a reinforcing structure connected between the node body and the anchoring structure, and / or between the node body and the inner chord member.

[0007] The inner chord includes an upper inner chord and two lower inner chords. The upper inner chord and the lower inner chord are hollow. The upper inner chord is located in the middle of the truss body, with an outer diameter of D1 and a wall thickness of t1. The lower inner chords are located at both ends of the truss body, with an outer diameter of D2 and a wall thickness of t2. The node body is connected to the ends of the upper inner chord and the lower inner chord respectively.

[0008] The outer diameter of the node body is set to D3, and the wall thickness is set to t3, where D3 ≥ 1.2max(D1, D2), and / or t3 ≥ 1.5max(t1, t2).

[0009] The reinforced structure includes:

[0010] The first vertebral tube is connected to the inner chord upper rod and the node body respectively. The thickness of the first vertebral tube is t4, and the taper is C4, where 1.1×t1≤t4≤1.5×t1 and C4 ranges from 1:4 to 1:10.

[0011] The second vertebral tube is connected to the inner chord lower rod and the node body respectively. The thickness of the second vertebral tube is t5, and the taper is C5, where 1.1×t2≤t5≤1.5×t2 and C5 ranges from 1:4 to 1:10.

[0012] Anchoring structures include:

[0013] An anchoring body is connected to the opening, the opening being a through hole, the anchoring body penetrating the node body and housing the cable structure;

[0014] The limiting end is located at one end of the anchoring body facing the truss body, and includes a cable limiting part and a connecting end plate. The cable limiting part is limitedly connected to the cable structure, and the connecting end plate is sandwiched between the cable limiting part and the anchoring body, and is adapted to connect the cable limiting part and the anchoring body respectively.

[0015] Let the wall thickness of the anchor body be t6, the thickness of the cable limiting part in the radial direction be t7, and the thickness of the connecting end plate be t8. Then t6≥t3, t7≥2×t3, and t8≥1.5×t3.

[0016] The anchoring structure also includes a sealing plate, which is sealed and connected at the end of the anchoring body away from the limiting end, and is sleeved around the cable structure.

[0017] The web structure includes: a first web member, which is connected and disposed between adjacent arc-shaped circumferential members, and the adjacent first web members are distributed in a triangular structure, with the node body connected to the triangular structure on the side facing the truss body; and a second web member, which is connected and disposed between adjacent arc-shaped circumferential members away from the inner chord.

[0018] The reinforcing structure also includes: a plurality of reinforcing ribs, which are distributed at intervals along the circumference of the anchoring body, and the reinforcing ribs are arranged along the length of the anchoring body and connected to the outer wall of the node body.

[0019] The reinforcing ribs are arranged in a cross shape along the circumference of the anchor body.

[0020] The reinforcing structure also includes: a first ring rib structure disposed on the inner wall of the node body, passing through the intersection of the node body and the anchoring body; and / or, a second ring rib structure disposed on the inner wall of the node body, wherein the edge of the reinforcing rib plate corresponds to the second ring rib structure on the inner and outer sides of the node body.

[0021] The present invention also provides a method for tensioning cables in a truss structure, comprising: selecting a cable structure; selecting a tensioning method and obtaining the number of strut structures; and, according to the tensioning method, connecting the cable structure to two cable nodes on the inner chord, and making each strut structure spaced apart from each other and vertically arranged.

[0022] The tensioning method is either the first tensioning method or the second tensioning method, wherein...

[0023] The first tensioning method includes: limiting and connecting one end of the cable structure to the anchoring structure of one cable node of the truss main body; connecting several mutually spaced strut structures to the inner chord between the cable structure and the two cable nodes; and pulling the cable structure to the anchoring structure of another cable node of the truss main body and limiting and connecting it.

[0024] The second tensioning method includes: connecting several mutually spaced strut structures to the inner chord between the cable structure and the two cable nodes, wherein one end of one of the strut structures is connected to the middle of the inner chord and the other end is connected to the middle of the inner chord; and simultaneously pulling the two ends of the cable structure in opposite directions to the anchoring structures of the two cable nodes and limiting the connection.

[0025] Beneficial effects:

[0026] The cable structure ends are connected to the inner chord members on the main truss via anchorage structures, and also to the inner chord members between the two cable nodes via strut structures. The struts are hinged at both ends. The cables effectively balance the column base thrust generated by the structural dead load and live load, reducing the reaction force borne by the foundation. Furthermore, by using perforated and interconnected node main bodies and anchorage structures, combined with the adjacent reinforcing structures of the node main bodies, the structural volume of the cable nodes can be reduced while achieving a stable connection. This eliminates the need to directly increase the volume or cross-sectional area of ​​the node main bodies and anchorage structures, effectively overcoming the problems in existing technologies where the structural stress at the connection point between the cable and the truss main body is high, stability is poor, and a large cross-section or volume connection structure is required to ensure stability, increasing metal usage and cost. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a three-dimensional structural diagram of a truss structure according to an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A partial enlarged schematic diagram of the truss structure shown;

[0030] Figure 3 for Figure 1 A structural schematic diagram of the cable joint of the middle truss structure;

[0031] Figure 4 for Figure 3 A three-dimensional structural diagram of the central cable node;

[0032] Figure 5 This is a schematic diagram of the truss structure corresponding to the first tensioning method and the second tensioning method in the cable tensioning method of the truss structure according to an embodiment of the present invention;

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Truss main body; 101. Arc-shaped retaining rod; 102. First web member; 103. Second web member; 104. Upper inner chord member; 105. Lower inner chord member; 2. Cable joint; 201. Joint main body; 202. Opening; 203. Anchoring main body; 204. Cable limiting part; 205. Connecting end plate; 206. Sealing plate; 207. First vertebral tube; 208. Second vertebral tube; 209. Reinforcing rib plate; 210. First ring rib structure; 211. Second ring rib structure; 3. Cable structure; 4. Support structure. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] The following is combined Figures 1 to 5 The following describes embodiments of the present invention.

[0037] The present invention provides a truss structure, comprising: a truss body 1, a cable structure 3, a plurality of strut structures 4 and cable nodes 2.

[0038] The truss main body 1 is arched and includes several arc-shaped retaining members 101 and several web members connecting the arc-shaped retaining members 101. The number of arc-shaped retaining members 101 is not limited. Preferably, in this embodiment, three arc-shaped retaining members 101 are provided, with a triangular cross-section. This reduces costs while improving the structural stability of the truss main body 1. Furthermore, the three arc-shaped retaining members 101 are arranged with two on the outer side and one on the inner side. Specifically, "inner" and "outer" refer to the positions on the inner and outer edges of the arc-shaped truss main body 1. In this embodiment, the arc-shaped retaining members 101 on the inner side of the truss main body 1 are designated as inner chords, and two spaced-apart cable nodes 2 are provided on the inner chords. Preferably, the two cable nodes 2 are at the same horizontal height, and the tension cable structure 3, which is tensioned on the two cable nodes 2, is horizontally positioned. In addition, in this embodiment, the truss main body 1, the strut structure 4, and the cable nodes 2 are metal structures, preferably steel structures.

[0039] As a variable implementation, multiple cable nodes 2 can be set, and multiple cable structures 3 can be connected to them. As another variable implementation, the cable structure 3 can be set in a non-horizontal inclined manner.

[0040] The cable structure 3 is configured as a flexible cable, which can be steel strand or steel cable.

[0041] Several strut structures 4 are hinged to the inner chord between the cable structure 3 and the two cable nodes 2. Preferably, the strut structures 4 are arranged vertically and are evenly spaced apart from each other along the length of the cable structure 3. The number of strut structures 4 can be determined according to the design tension and material adaptability of the cable structure 3. As a variable implementation, the strut structures 4 can be arranged at an angle.

[0042] Cable node 2 includes: node body 201, anchoring structure and reinforcing structure.

[0043] The node body 201 is arranged in an arc-shaped column or cylinder. In this embodiment, it is arranged in a cylinder to reduce the structural weight and save materials. The two ends of the node body 201 are connected to the inner chord. An opening 202 is provided on the outer wall of the node body 201. In this embodiment, the opening 202 is a through hole and is opened in the horizontal direction. As a variable implementation, it can also be arranged as a single-sided opening.

[0044] The anchoring structure is cylindrical or columnar. In this embodiment, it is cylindrical and contains a cable structure 3. The anchoring structure passes laterally through the opening 202 and is welded to the node body 201. One end of the anchoring structure is connected to the cable structure 3 and tensioned.

[0045] The reinforcing structure is adjacent to the node body 201 and is connected between the node body 201 and the anchoring structure, and between the node body 201 and the inner chord. As a variable implementation, the reinforcing structure may be provided only between the node body 201 and the anchoring structure, or between the node body 201 and the inner chord.

[0046] The cable structure 3 is connected at its end to the inner chord of the main truss 1 via an anchoring structure, and also to the inner chord between the two cable nodes 2 via a strut structure 4. The struts are hinged at both ends. The cable can effectively balance the column base thrust generated by the dead load and live load of the structure, reducing the reaction force borne by the foundation. Furthermore, by setting perforated and interconnected node main bodies 201 and anchoring structures, combined with the setting of adjacent reinforcing structures of node main bodies 201, the structural volume of cable nodes 2 can be reduced while achieving a stable connection. This eliminates the need to directly increase the volume or cross-sectional area of ​​node main bodies 201 and anchoring structures, effectively overcoming the problems in the prior art where the structural stress at the connection position between the cable and the main truss 1 is high, the stability is poor, and a connection structure with a large cross-section or volume is required to ensure stability, increasing the amount of metal used and the cost.

[0047] In this embodiment, the inner chord members include an upper inner chord member 104 and two lower inner chord members 105. The upper and lower inner chord members 104 and 105 are hollow. The upper inner chord member 104 is located in the middle of the truss body 1, with an outer diameter of D1 and a wall thickness of t1. The lower inner chord members 105 are located at both ends of the truss body 1, with an outer diameter of D2 and a wall thickness of t2. The node body 201 is connected to the ends of the upper and lower inner chord members 104 and 105, respectively. This arrangement facilitates the installation and maintenance of the node body 201. Furthermore, the hollow arrangement of the node body 201 and the inner chord members reduces structural costs.

[0048] As a variable implementation, the inner chord can be set as a single rod and pass through the node body 201.

[0049] Furthermore, the outer diameter of the node body 201 is set to D3, the wall thickness is t3, D3≥1.2max(D1, D2), and / or, t3≥1.5max(t1, t2). With this setting, by thickening the hollow node body 201, the structural strength of the node body 201 can be guaranteed while reducing its self-weight and saving costs.

[0050] The reinforcing structures include: the first vertebral canal 207 and the second vertebral canal 208.

[0051] The first vertebral tube 207 is connected to the inner chord upper rod 104 and the node body 201 respectively. The thickness of the first vertebral tube 207 is t4, and the taper is C4, 1.1×t1≤t4≤1.5×t1, and the range of C4 is 1:4 to 1:10. Preferably, t4 is 1.2 times t1.

[0052] The second vertebral tube 208 is connected to the inner chord lower rod 105 and the node body 201 respectively. The thickness of the second vertebral tube 208 is t5, and the taper is C5, 1.1×t2≤t5≤1.5×t2, and the range of C5 is 1:4 to 1:10. Preferably, t5 is 1.2 times t2.

[0053] By setting a first conical tube 207 and a second conical tube 208, the node body 201 and the inner chord can be transitionally connected, ensuring a stable connection of the structure. In addition, preferably, the taper of the first conical tube 207 and the second conical tube 208 can be adjusted according to the outer diameter of the node body 201 and the inner chord.

[0054] The anchoring structure includes: the anchoring body 203 and the limiting end.

[0055] The anchoring body 203 is cylindrical and connected to the opening 202, which is a through hole. The anchoring body 203 penetrates the node body 201 and houses the cable structure 3. A limiting end is located at the end of the anchoring body 203 facing the truss body 1, including a cable limiting part 204 and a connecting end plate 205. The cable limiting part 204 is hollow and connected to the cable structure 3 for limiting. The connecting end plate 205 is sandwiched between the cable limiting part 204 and the anchoring body 203, suitable for connecting the cable limiting part 204 and the anchoring body 203 respectively. Preferably, the connecting end plate 205 is welded to the anchoring body 203.

[0056] Let the wall thickness of the anchoring body 203 be t6, the radial thickness of the cable limiting part 204 be t7, and the thickness of the connecting end plate 205 be t8. Then, t6 ≥ t3, t7 ≥ 2 × t3, and t8 ≥ 1.5 × t3. By increasing the thickness of the limiting end, the structural volume is smaller. This arrangement improves structural stability while having a smaller impact on the increase in structural weight and material cost.

[0057] The anchoring structure also includes a sealing plate 206, which is sealed at the end of the anchoring body 203 furthest from the limiting end and is fitted around the perimeter of the cable structure. Preferably, the sealing plate 206 is thicker than 4mm. This design effectively prevents corrosive media such as moisture and dust from entering the anchoring body 203, improving structural lifespan and reducing maintenance difficulty.

[0058] The web structure includes: a first web member 102 and a second web member 103.

[0059] The first web members 102 are connected between adjacent arc-shaped retaining members 101, and the adjacent first web members 102 are distributed in a triangular structure. The node body 201 is connected to the triangular structure on the side facing the truss body 1, specifically connecting four first web members 102. The second web members 103 are connected between two adjacent arc-shaped retaining members 101 away from the inner chord. Preferably, the second web members 103 are arranged in parallel intervals. The different web member structures can improve the connection strength between the arc-shaped retaining members 101, and provide targeted reinforcement for the arc-shaped retaining members 101 at different locations.

[0060] The reinforcing structure also includes a number of reinforcing ribs 209, which are spaced apart circumferentially along the anchoring body 203 and arranged along the length of the anchoring body 203, and connected to the outer wall of the node body 201. Preferably, the reinforcing ribs 209 are arranged in a cross shape circumferentially along the anchoring body 203.

[0061] As a variable implementation method, the reinforcing ribs 209 can also be arranged in two or more directions.

[0062] The reinforcing structure also includes a first ring rib structure 210 and a second ring rib structure 211. As an alternative implementation, only one of the first ring rib structure 210 and the second ring rib structure 211 may be provided, or neither may be provided.

[0063] Two first ring rib structures 210 are arranged in a ring on the inner wall of the node body 201, passing through the intersection of the node body 201 and the anchor body 203. In this embodiment, there are four intersections between the node body 201 and the anchor body 203. The two first ring rib structures 210 are respectively arranged at the intersections near the two ends of the node body 201. As a variable implementation, two more first ring rib structures 210 can be added and arranged at the intersections away from the two ends of the node body 201.

[0064] The second ring rib structure 211 is in the shape of an inner ring and is set on the inner wall of the node body 201. The edge of the reinforcing rib plate 209 corresponds to the second ring rib structure 211 on the inner and outer sides of the node body 201.

[0065] The first ring rib structure 210 and the second ring rib structure 211 can further strengthen the connection strength between the node body 201 and the anchor body 203, and enhance the stability of the rib plate 209.

[0066] This embodiment also provides a cable tensioning method for a truss structure, including: selecting a cable structure 3; selecting a tensioning method and obtaining the number of strut structures 4; and according to the tensioning method, connecting the cable structure 3 to two cable nodes 2 of the inner chord, and making each strut structure 4 spaced apart from each other and vertically arranged.

[0067] Among them, the selection of cable structure 3 can be determined based on the tension required when the cable structure 3 is tensioned to a preset length.

[0068] Furthermore, the tensioning method can be either the first tensioning method or the second tensioning method.

[0069] The first tensioning method includes: limiting and connecting one end of the cable structure 3 to the anchoring structure of one cable node 2 of the truss body 1; connecting several mutually spaced strut structures 4 to the inner chord between the cable structure 3 and the two cable nodes 2; and pulling the cable structure 3 to the anchoring structure of the other cable node 2 of the truss body 1 and limiting and connecting it.

[0070] The second tensioning method includes: connecting several mutually spaced strut structures to the inner chord between the cable structure and the two cable nodes, with one end of one strut structure connected to the middle of the inner chord and the other end connected to the middle of the inner chord; simultaneously pulling the two ends of the cable structure in opposite directions to the anchoring structures of the two cable nodes and limiting the connection.

[0071] Furthermore,

[0072] like Figure 5 As shown, when the first tensioning method is selected, the cable tension of the cable structure is defined as F, the cross-sectional area as A, the cable cutting length as S0, and the length after tensioning and fixing as S, where S > S0. During tensioning, one side of the cable structure is first anchored to the anchoring structure, and the other end is tensioned on one side. After tensioning, the distance between each strut is Li. Before tensioning, the strut structure is tilted in the opposite direction of tensioning, and the distance from the vertical point is Δi. After the cable tension reaches the design value, it is fixed at the end, where: The maximum value of n is the number of struts.

[0073] When the second tensioning method is selected, the intermediate strut structure is determined and vertically connected to the cable structure and the inner chord. Tensioning is performed at both ends of the cable structure, and then it is fixed after tensioning. n = number of struts / 2 - 1.

[0074] Preferably, after the cable structure is tensioned and fixed to a length of S, the deviation does not exceed 5%, and each strut structure is in a vertical position with a deviation of no more than 3°.

[0075] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A truss structure, characterized in that, include: The truss body (1) is arched and includes several arc-shaped circumferential members (101) and several web members connected between the arc-shaped circumferential members (101). The arc-shaped circumferential members (101) on the inner side of the truss body (1) are set as inner chord members, and two cable nodes (2) are set on the inner chord members. The cable structure (3) is tensioned on the two cable nodes (2); Several strut structures (4) are connected and set on the inner chord between the cable structure (3) and the two cable nodes (2), and are arranged vertically and distributed at intervals along the length of the cable structure (3); The cable node (2) includes: The node body (201) is connected to the inner chord, and an opening (202) is provided on the outer wall of the node body (201). An anchoring structure passes laterally through the opening (202) and is connected to the node body (201). The anchoring structure is connected and tensioned to one end of the cable structure (3). A reinforcing structure is provided adjacent to the node body (201) and connected between the node body (201) and the anchoring structure, and / or between the node body (201) and the inner chord. The inner chord includes an upper inner chord (104) and two lower inner chords (105). The upper inner chord (104) and the lower inner chords (105) are hollow. The upper inner chord (104) is located in the middle of the truss body (1), and the lower inner chords (105) are located at both ends of the truss body (1). The node body (201) is connected to the ends of the upper inner chord (104) and the lower inner chords (105) respectively. The reinforcing structure includes: The first vertebral canal (207) is connected to the inner chord upper rod (104) and the node body (201), respectively. The second vertebral canal (208) is connected to the inner chord lower rod (105) and the node body (201), respectively. A number of reinforcing ribs (209) are distributed circumferentially along the anchor body (203), the reinforcing ribs (209) are arranged along the length direction of the anchor body (203) and are connected to the outer wall of the node body (201); The reinforcing structure also includes: The first ring rib structure (210) is disposed on the inner wall of the node body (201) and passes through the intersection of the node body (201) and the anchoring body (203); And / or, The second ring rib structure (211) is disposed on the inner wall of the node body (201), and the edge of the reinforcing rib plate (209) corresponds to the second ring rib structure (211) on the inner and outer sides of the node body (201).

2. The truss structure according to claim 1, characterized in that, Let the outer diameter of the upper inner chord rod (104) be D1 and the wall thickness be t1, and let the outer diameter of the lower inner chord rod (105) be D2 and the wall thickness be t2.

3. The truss structure according to claim 2, characterized in that, The outer diameter of the node body (201) is set to D3, the wall thickness is t3, D3≥1.2max(D1,D2), and / or, t3≥1.5max(t1,t2).

4. The truss structure according to claim 3, characterized in that, a The thickness of the first vertebral canal (207) is t4, and the taper is set to C4, 1.1×t1≤t4≤1.5×t1, and the range of C4 is 1:4 to 1:10; Let the thickness of the second vertebral canal (208) be t5, and the taper be C5, where 1.1×t2≤t5≤1.5×t2, and the range of C5 is 1:4 to 1:

10.

5. The truss structure according to claim 3 or 4, characterized in that, The anchoring structure includes: An anchor body (203) is connected to the opening (202), the opening (202) is a through hole, the anchor body (203) penetrates the node body (201) and has the cable structure (3) built in. The limiting end is located at one end of the anchor body (203) facing the truss body (1), and includes a cable limiting part (204) and a connecting end plate (205). The cable limiting part (204) is limitedly connected to the cable structure (3), and the connecting end plate (205) is sandwiched between the cable limiting part (204) and the anchor body (203), and is suitable for connecting the cable limiting part (204) and the anchor body (203) respectively.

6. The truss structure according to claim 5, characterized in that, a The wall thickness of the anchor body (203) is t6, the thickness of the cable limiting part (204) in the radial direction is t7, and the thickness of the connecting end plate (205) is t8. Then t6≥t3, t7≥2×t3, and t8≥1.5×t3.

7. The truss structure according to claim 5, characterized in that, The anchoring structure also includes: The sealing plate (206) is provided at one end of the anchor body (203) away from the limiting end and is sleeved on the periphery of the cable structure (3).

8. The truss structure according to any one of claims 1-4 and 6-7, characterized in that, The web member structure includes: The first web member (102) is connected between the adjacent arc-shaped surrounding members (101). The adjacent first web members (102) are distributed in a triangular structure. The node body (201) is connected to the triangular structure on the side facing the truss body (1). The second web member (103) is connected between adjacent arc-shaped surrounding members (101) located away from the inner chord member.

9. The truss structure according to claim 1, characterized in that, The reinforcing ribs (209) are arranged in a cross shape along the circumference of the anchor body (203).

10. A method for tensioning cables in a truss structure, characterized in that, The method is based on the truss structure of any one of claims 1-9, and includes: Select the appropriate cable structure (3); Select the tensioning method and obtain the number of struts (4); According to the tensioning method, the cable structure (3) is connected and set on the two cable nodes (2) of the inner chord, and the various strut structures (4) are spaced apart from each other and set vertically.

11. The cable tensioning method for the truss structure according to claim 10, characterized in that, The tensioning method is as follows: The first method of tensioning includes: On the anchoring structure of a cable node (2) of the truss body (1), one end of the cable structure (3) is limited and connected; Several strut structures (4) are connected to the inner chord between the cable structure (3) and the two cable nodes (2). The traction cable structure (3) is anchored to the anchorage structure of another cable node (2) of the truss body (1) and limited in position; or, The second method of tensioning includes: On the inner chord between the cable structure (3) and the two cable nodes (2), several strut structures (4) are connected at intervals, and one of the strut structures (4) is connected at one end to the middle of the inner chord and at the other end to the middle of the inner chord. The two ends of the synchronous opposite traction cable structure (3) are connected to the anchoring structure of the two cable nodes (2) and limited.

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