CN216552415U - Large-span building structure of cable-strut system - Google Patents

Abstract

The utility model discloses a cable-pole system large-span building structure, and belongs to the technical field of spatial structures in civil engineering. The cable-rod system large-span building structure consists of a central truss ring beam, a central radial cable, a stay cable, a cable tower, a connecting rod, a radial lattice type ridge cable system, a circumferential cable, a cross cable and a radial cable; each radial lattice type ridge cable system is composed of two upper radial ridge cables, one lower radial ridge cable and a plurality of short supporting rods, and provides radial relatively rigid support for the cable net; crossed cables are additionally arranged in the annular cables to improve the rigidity of the roof system; the cable towers are connected pairwise by the connecting rods, so that the lateral stability of the cable towers can be improved; the cable tower applies multi-level suspension constraint to the cable net system through the stay cables and the radial cables, and the safety of the roof cable net can be improved. The utility model draws the concept of tensioning the whole structure, inherits the advantages of the cable dome, further improves the whole rigidity and stability of the structure and makes the selectable range of the roofing material wider.

Description

A large-span building structure with a cable-rod system

technical field

The utility model relates to a large-span building structure with a cable-rod system, belonging to the technical field of large-span structures or space structures in civil engineering.

Background technique

With the growth of social demand, various public places such as sports and exhibitions continue to develop to a larger span. In this process, new structural forms such as string beams, cable nets, prestressed trusses, string support domes, and cable domes have emerged as the times require, combining prestressing technology with steel structure systems, which greatly enriches the architectural shape and improves the bearing capacity of the structure. ability. Conventional cable dome is a space structure mainly composed of ridge cables, oblique cables and ring cables. It is based on the idea of tensile overall structure. .

In order to meet the requirements of architectural modeling and structural bearing, the grid size between the cable dome components is relatively large, which requires the roof system itself to have a good spanning capacity. At the same time, because the cable structure is a flexible structure, it will Large deformation occurs, in order to adapt to the characteristics of its deformation, the roof system should use flexible membrane material instead of rigid plate, so tension membrane is mostly used as the roof material of cable dome at home and abroad.

However, the traditional cable dome structure has the following shortcomings: (1) the construction and forming mechanism of the cable dome structure is relatively complex, the construction is difficult, and the construction requirements are high; (2) the traditional centrally supported cable dome structure is generally in the center position. A single main vertical support member is arranged, this vertical support member has a large bearing capacity, high safety requirements, and less structural redundancy constraints, low safety; (3) The traditional peripheral support cable dome structure has high pressure on the side ring beams , resulting in an increase in the design section of the edge ring beam, which increases the burden on the vertical support structure and consumes a lot of materials.

Utility model content

If the traditional cable dome is used to support the roof, the rigidity of the roof is poor. When the roof adopts tensile membrane, the deformation control and stress safety of the roof cannot be guaranteed under the action of strong wind vibration; when the roof adopts rigid roof material, it is necessary to Larger cable forces support the roof, and higher requirements for the material of the cable net are required. Therefore, in order to inherit the advantages of conventional cable domes and apply a variety of roofing materials, a new type of cable-rod system large-span building structure with better overall stiffness and stability is required.

The purpose of this utility model is to propose a novel cable-rod system large-span building structure, which consists of a central truss ring beam, a central radial cable, a stay cable, a radial cable, an annular cable, a cross cable, a radial lattice type It is composed of chord system, tower and connecting rod, on which tension membrane or light rigid roofing material can be laid. The long-span building structure of the cable-rod system inherits the advantages of the cable dome on the basis of the concept of the overall structure of tension, and further improves the overall rigidity and stability of the structure, making the structure lighter and the choice of roofing materials. wider, which is conducive to the promotion and application of this type of structure.

The utility model provides a large-span building structure of a cable-rod system. The large-span architectural structure of the cable-rod system comprises: a central truss ring beam (1), multiple central radiating cables (2), and multiple cables (3) , multiple cable towers (4), multiple connecting rods (5), multiple radial lattice ridge cables (6), multiple annular cables (7), multiple crossing cables (8) and multiple diameters A direction cable (9); the center truss ring beam (1), the multiple channels of the center radial cables (2), the multiple channels of the radial lattice type ridge cable system (6), the multiple channels of the hoop cables ( 7) and a plurality of said cross cables (8) to form a dome system, wherein a plurality of said central radiating cables (2) are connected to each other at a point at the center of the central truss ring beam (1), and are connected by the central truss ring. The center of the beam (1) is radially stretched to the upper chord of the central truss ring beam (1); the upper ends of the multiple radial lattice ridge cable systems (6) are connected to the central truss ring beam (1). ) is connected, and the lower end is anchored to the foundation; multiple said cross cables (8) are overlapped on multiple said hoop cables (7), and said hoop cables (7) and said cross cables (8) Both ends are connected with the adjacent radial lattice type ridge cable system (6) to form a dome system; the cable tower (4) is connected to the multi-channel cable tower (4) at the top of the tower through multiple channels of the stay cables (3). The radial lattice type ridge cable system (6) is connected, and the cable tower (4) is connected with the central truss ring beam (1) through the radial cable (9) at the top of the tower, so as to form the dome system. Multi-point, multi-direction and multi-level suspension support; the large-span building structure of the cable-rod system forms an overall stress-bearing structure system in space.

In one embodiment, a plurality of the pylons (4) are connected in a circumferential direction by a plurality of the connecting rods (5), and the connecting rods (5) serve as a lateral support between the spans to raise the pylons (4) stability.

In one embodiment, the radial lattice type notochord (6) consists of two upper radial notches (10), a lower radial notochord (11) and short struts (12); In the lattice type ridge cable system (6), the upper ends of two upper radial ridge cables (10) are connected with the upper chord (13) of the central truss ring beam (1), and the upper end of one lower radial ridge cable (11) Connected with the lower chord (14) of the central truss ring beam (1), two upper radial ridges (10) and one lower radial ridge (11) are collected at the lower end and anchored with the foundation; the short struts ( 12) It is arranged at the connecting section of the radial lattice type notochord system (6) and the hoop cable (7), and each section is composed of three short struts (12) to form a closed triangle.

In one embodiment, the short struts (12) are used to maintain the distance between the three ridge cables in the radial lattice ridge cable system (6), and improve the overall bending and torsional stiffness of the section.

In one embodiment, a plurality of said cross cables (8) and a plurality of said hoop cables (7) are staggered obliquely, and said hoop cables (7) are arranged below said cross cables (8) , the hoop cable (7) is used as the load-bearing cable of the structure, and the cross cable (8) is used as the stabilizing cable of the structure.

In one embodiment, multiple central radial cables (2), multiple stay cables (3), multiple hoop cables (7), multiple crossing cables (8), multiple radial cables (9) , The multi-channel upper radial ridge cable (10) and the lower radial ridge cable (11) are all flexible cables, which can be made of steel strands, steel wire ropes or steel wire bundles composed of high-strength steel wires.

In one embodiment, the short strut (12) is a rigid member, and can be made of a round steel pipe if the force is large.

In one embodiment, if the short strut (12) is under less force, it can be made of single angle steel.

In an embodiment, if the force of the cable tower (4) is small, a solid-web steel member is used, and the cross-section includes a round pipe, an H-shaped cross-section or a box-shaped cross-section.

In an embodiment, if the cable tower (4) is subjected to a relatively large force, it is made of a CFST member with a circular cross-section or a rectangular cross-section, or a lattice-type steel member.

Beneficial effects:

On the basis of drawing on the concept of the overall structure of tension, the utility model applies the central truss ring beam, the central radial cable, the stay cable, the cable tower, the connecting rod, the radial lattice type ridge cable system, the ring cable, the cross cable and the radial cable. The cable forms the overall force-bearing structural system of the space, and its beneficial effects are:

(1) The radial lattice type ridge cable system formed by two upper radial ridge cables, one lower radial ridge cable and several short struts can be prefabricated in the factory in advance, tensioned and connected on site, and the construction efficiency is high; The rod can maintain the spacing of the three ridge cables and improve the overall bending and torsional stiffness of the section. The entire radial lattice ridge cable system becomes several radial skeletons with relatively high stiffness in the dome cable network system. boundary.

(2) The cable tower realizes multi-point, multi-direction and multi-level suspension constraints through the cable-stayed cable and radial cable-to-cable net system. The redundant constraints ensure the controllable shape of the roof cable net and improve the safety of the structure.

(3) Compared with the traditional central support cable dome, the dependence on the central vertical support member is significantly reduced, and the safety is improved; compared with the traditional peripheral support cable dome, there is no need to design a rigid ring beam with a larger section, saving energy less material and more economical.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the cable-rod system large-span building structure of the present invention;

Fig. 2 is the top view of the cable-rod system large-span building structure of the present utility model;

Fig. 3 is the three-dimensional schematic diagram of the radial lattice type notochord system of the cable-rod system large-span building structure of the present invention;

4 is a three-dimensional schematic diagram of the central truss ring beam of the cable-rod system large-span building structure of the present invention;

Among them, 1- center truss ring beam; 2- center radial cable; 3- stay cable; 4- cable tower; 5- connecting rod; 6- radial lattice ridge cable system; 7- hoop cable; ; 9 - radial cable; 10 - upper radial ridge cable; 11 lower radial ridge cable; 12 - short strut; 13 - the upper chord of the central truss ring beam;

Detailed ways

The large-span building structure of the cable-rod system proposed by the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that, the accompanying drawings are all in a very simplified form and in inaccurate scales, and are only used to facilitate and clearly assist the purpose of explaining the embodiments of the present invention.

Example 1

This embodiment provides a large-span building structure with a cable-rod system. The large-span building structure with a cable-rod system includes: a central truss ring beam 1 , a multi-channel central radiating cable 2 , a multi-channel stay cable 3 , and a plurality of cable towers 4 , Multiple connecting rods 5, multiple radial lattice ridge cables 6, multiple annular cables 7, multiple cross cables 8 and multiple radial cables 9. Among them, the multi-channel central radiating cables 2 are connected to one point at the center of the central truss ring beam 1, and are radially stretched from the center to the upper chord of the central truss ring beam 1; the multi-channel radial lattice type ridge cable system 6. The upper end is connected to the central truss ring beam 1, and the lower end is anchored to the foundation; multiple cross cables 8 are overlapped on the multiple channels of the ring cables 7, and both ends are connected to the adjacent radial grids. The construction notochord system 6 is connected to form a dome system. The cable tower 4 is connected to the radial lattice type ridge cable system 6 through multiple cables 3 at the top of the tower, and the cable tower 4 is connected to the central truss through the radial cable 9 at the top of the tower. Ring beams 1 are connected to form multi-point, multi-directional and multi-level suspension support for the dome system; the long-span building structure of the cable-rod system forms an overall stress-bearing structure system in space.

The cable tower 4 is connected with the two upper radial ridge cables 10 of the multi-channel radial lattice ridge cable system 6 through the multi-channel stay cable 3 at the top of the tower, and the cable tower 4 is connected to the central truss through the radial cable 9 at the tower top. The ring beam 1 is connected to form a multi-point, multi-directional and multi-level suspension support for the dome system.

In one embodiment, the pylons 4 are connected in a circumferential direction by connecting rods 5 , which serve as lateral supports between spans and improve the stability of the pylons 4 .

In one embodiment, the radial lattice type notochord 6 is composed of two upper radial notches 10 , a lower radial notochord 11 and a short strut 12 ; in the radial lattice notochord 6 , the upper ends of the two upper radial ridge cables 10 are connected with the upper chord 13 of the central truss ring beam 1, the upper end of a lower radial ridge cable 11 is connected with the lower chord 14 of the central truss ring beam 1, and the two upper radial ridge cables 10 and A lower radial notochord 11 gathers at the lower end and is anchored with the foundation; the short struts 12 are arranged on the connecting section between the radial lattice ridges 6 and the hoop cable 7, and three short struts 12 at each section form a closed triangle.

In one embodiment, the cross cable 8 and the hoop cable 7 are staggered obliquely, the hoop cable 7 is arranged below, the cross cable 8 is arranged above, and the hoop cable 7 is used as the load-bearing cable of the structure, and the cross cable 7 is arranged at the top. 8 as a stabilizing cable for the structure.

In one embodiment, the multi-channel radial cables 2, the multi-channel stay cables 3, the multi-channel hoop cables 7, the multi-channel cross cables 8, the multi-channel radial cables 9 and the multi-channel lower radial ridge cables 11 are all Flexible cables can be made of steel strands, wire ropes or wire bundles composed of high-strength steel wires.

In one embodiment, the short strut 12 is a rigid member, and can be made of a round steel pipe if the force is large.

In one embodiment, the short strut 12 can be made of single angle steel if the force is small.

In an embodiment, if the force of the cable tower 4 is small, a solid-web steel member is used, and the cross-section includes a round pipe, an H-shaped cross-section or a box-shaped cross-section.

In one embodiment, if the cable tower 4 is subjected to a large force, it is made of a concrete-filled steel tube member with a circular or rectangular cross-section, or a lattice-type steel member.

Embodiment 2

This embodiment provides a method for designing the large-span building structure of the cable-rod system described in the first embodiment, and the basic steps are as follows:

1) First of all, according to the building shape, function and structural bearing requirements, the radius of the central truss ring beam, the number of cable tower layout plans, the radius of the cable tower from the center of the dome, and the size of the cable dome space surface are preliminarily determined.

2) According to the vertical load distribution, calculate the maximum load shared by the cable tower, and preliminarily design the cable tower structure scheme. The number, material and section of connecting rods are designed according to the stability requirements of the tower under maximum force.

3) According to the number and spacing of the pylons, determine the arrangement position and spacing of the radial lattice notochord system. According to the maximum shared load of a radial lattice type ridge cable system, the material and section size of the radial cable and the material and section size of the short strut are preliminarily designed.

4) Select the roof material, initially determine the spacing of the hoop cables according to its spanning capacity, and then determine the number of hoop cables according to the design surface of the dome. According to the self-weight of the roof material and the maximum live load of the roof, considering the strength of the cable system and the allowable deformation value of the cable net, the material and section size of the hoop cable are preliminarily determined.

5) Determine the spacing of the central radiating cables according to the spanning ability of the roof material within the range of the central truss ring beam, and then determine its number; according to the self-weight of the roof material and the maximum live load of the roof within the range of the central truss ring beam, consider the strength of the cable system and the allowable cable network. The deformation value is used to preliminarily determine the material and section size of the central radial cable.

6) Establish the overall force analysis model of the structural system, and adjust and determine the cable tower, connecting rod, radial lattice ridge cable system, hoop cable and central radiation according to the strength, stiffness and stability check calculation under each load condition combination Structural design scheme of cables; determine the structural design scheme of the central truss ring beam, including the section of the members of the ring beam, the height of the truss and the arrangement of the web members, the material and section size of the radial cable, stay cable and cross cable; determine the tension of each cable Tensile prestress.

7) The reasonable configuration of the final system that needs to be realized after the construction is completed, the optimized structural design scheme of each component, and the tensile prestress value of the cable system need to be repeatedly performed for the entire structural system under various combinations of possible load conditions. The checking calculation and structural design adjustment of bearing capacity limit state and normal service limit state cannot be obtained until the design results are safe, reliable and economical.

In the construction stage, the first step is to prefabricate the central truss ring beam on the ground, and tension and anchor the central radial cable in it; at the same time, fabricate the cable tower and the connecting rod, erect the cable tower on the construction site and connect the connecting rod in the circumferential direction, and then the top of the cable tower is erected. The cable-pulling wind rope ensures its dimensional stability. In the second step, the radial cable is connected between the central truss ring beam and the top of the cable tower, the other end of the radial cable is anchored to the ground foundation, and the central truss ring beam is lifted to a predetermined position by tensioning the radial cable. The third step is to connect and stretch the radial lattice ridge cable system, so that the upper end is connected to the central truss ring beam, and the lower end is anchored to the ground foundation. The fourth step is to connect and stretch the stay cables to establish a reliable connection between the top of the tower and the radial lattice type notochord system. The fifth step is to connect and stretch the loop cable. The sixth step is to connect and tension the cross cable. The seventh step is to lay the roofing material. The eighth step is to adjust the tension of radial cables, stay cables and radial lattice ridge cables so that the central truss ring beam is in the expected position, so that the radial lattice ridge cables can reach the expected curve shape; adjust the hoop cables and cross cable tension, so that the cable system dome surface reaches the expected position and shape.

Different from the conventional cable dome, the structure of the present utility model has the following characteristics:

(1) Each radial lattice ridge cable system consists of two upper radial ridge cables, one lower radial ridge cable and short struts, which greatly enhances the overall rigidity of the structure.

(2) The cross cable and the hoop cable are staggered obliquely, the lower hoop cable is used as the load-bearing cable of the structure, and the upper cross cable is used as the stability cable of the structure. Under the main action of the roof self-weight and wind load, the hoop cable and the cross cable will be tightly fastened due to different positive and negative curvature states, making the structure stronger and more stable.

(3) The cable tower forms multi-point, multi-direction, and multi-level suspension of the roof system through stay cables and radial cables, and the redundant constraints imposed by the cable tower make the overall structure more controllable; the connection between adjacent cable towers The rods also ensure the lateral stability of the pylon.

Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Anyone who is familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present invention should be defined by the claims.

Claims (10)

1. A cable-strut system large-span building structure, characterized in that it comprises: the cable comprises a central truss ring beam (1), a plurality of central radial cables (2), a plurality of stay cables (3), a plurality of cable towers (4), a plurality of connecting rods (5), a plurality of radial lattice type ridge cable systems (6), a plurality of ring cables (7), a plurality of cross cables (8) and a plurality of radial cables (9);

the central truss ring beam (1), the plurality of central radial cables (2), the plurality of radial lattice type ridge cable systems (6), the plurality of annular cables (7) and the plurality of cross cables (8) form a dome system; the central radial cables (2) are mutually connected to one point at the circle center of the central truss ring beam (1), radiate from the circle center of the central truss ring beam (1) to the periphery and stretch to the upper chord of the central truss ring beam (1); the upper ends of the plurality of radial lattice type ridge cable systems (6) are connected with the central truss ring beam (1), and the lower ends of the plurality of radial lattice type ridge cable systems are anchored with a foundation; both ends of the circumferential cables (7) and the cross cables (8) are connected with the adjacent radial lattice type ridge cable system (6);

the cable tower (4) is connected with a plurality of radial lattice type ridge cable systems (6) at the tower top through a plurality of stay cables (3), and the cable tower (4) is connected with the central truss ring beam (1) at the tower top through radial cables (9) so as to form multi-point and multi-direction suspension support for the dome system; the cable-strut system large-span building structure forms a spatial integral stress structure system.

2. The cable-strut system large-span building structure according to claim 1, wherein a plurality of cable towers (4) are connected in a circumferential direction by a plurality of connecting rods (5), and the connecting rods (5) are used as a cross-span lateral support to improve the stability of the cable towers (4).

3. The cable-strut system large-span building structure according to claim 1, wherein the radial lattice-type ridge cable system (6) is composed of two upper radial ridge cables (10), one lower radial ridge cable (11) and short struts (12);

in the radial lattice type ridge cable system (6), the upper ends of two upper radial ridge cables (10) are connected with an upper chord (13) of the central truss ring beam (1), the upper end of one lower radial ridge cable (11) is connected with a lower chord (14) of the central truss ring beam (1), and the two upper radial ridge cables (10) and the one lower radial ridge cable (11) are converged at the lower ends and anchored with a foundation; the short support rods (12) are arranged on the connecting sections of the radial lattice type ridge cable system (6) and the circumferential cables (7), and each section is a closed triangle formed by three short support rods (12).

4. A cable-and-rod system large-span building structure according to claim 3, characterized in that said short stay (12) is used to maintain the spacing of three ridge cables in said radial lattice-type ridge cable system (6) and to increase the overall bending and torsional rigidity of the section.

5. A cable-rod system large-span building structure according to claim 1, wherein a plurality of said crossing cables (8) are diagonally staggered with a plurality of said circumferential cables (7), and said crossing cables (8) are overlapped above said circumferential cables (7) with said circumferential cables (7) as the load-bearing cables of the structure and said crossing cables (8) as the stabilizing cables of the structure.

6. The long-span building structure with the cable-rod system according to any one of claims 1, 3 or 5, wherein the plurality of central radial cables (2), the plurality of stay cables (3), the plurality of circumferential cables (7), the plurality of cross cables (8), the plurality of radial cables (9), the plurality of upper radial ridges (10) and the lower radial ridges (11) are flexible cables and can be made of steel strands, steel wire ropes or steel wire bundles consisting of high-strength steel wires.

7. A cable-and-rod system large-span building structure according to claim 3, characterized in that said short stay bar (12) is a rigid member made of round steel tube.

8. A cable-strut system large-span building structure according to claim 3, characterized in that said short strut (12) is made of single angle steel.

9. A cable-and-rod system large-span building structure according to any one of claims 1 to 2, characterized in that the cable tower (4) is a solid web steel member, the cross-section comprising a round tube, an H-section or a box-section.

10. The cable-strut system large-span building structure according to any one of claims 1 to 2, wherein the cable tower (4) is made of a steel pipe concrete member of a circular section or a rectangular section, or a lattice steel member.

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