CN210482715U

CN210482715U - Tensioning structure

Info

Publication number: CN210482715U
Application number: CN201921196526.6U
Authority: CN
Inventors: 郝志鹏; 张峥
Original assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Current assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-05-08
Anticipated expiration: 2029-07-26

Abstract

The utility model relates to a tension structure, which comprises a first rigid brace rod and a guy cable, wherein the first end part of the first rigid brace rod is movably connected with an external support structure through a brace rod connecting node, and the middle part of the guy cable is connected with the second end part of the first rigid brace rod; the upper end parts of the inhaul cables are connected to an external supported structure, and the lower end parts of the inhaul cables are connected to the external supported structure; the first rigid support rod and the upper inhaul cable form a rotating plane of the first rigid support rod, and the support rod connecting node restrains the first rigid support rod from rotating out of plane relative to the rotating plane. Compared with the prior art, the utility model has the advantages of wide application range, simple structure, easy manufacture, convenient installation, etc.

Description

Tensioning structure

Technical Field

The utility model belongs to the technical field of building structure technique and specifically relates to a tension structure is related to.

Background

In recent ten years, with the development of domestic sports industry, the demand for large-scale sports buildings has increased dramatically. Meanwhile, the aesthetic feeling of the building is more emphasized due to the improvement of the living standard of the people's materials due to the development of domestic economy. Traditional architectural forms have been difficult to meet the aesthetic demands of the public, so in recent years cable tension structures have gained increasing favor of architects and architects with their light and efficient characteristics. The tension structure is different from a traditional pure rigid structure, and due to the characteristic of zero compression rigidity of the stay cable, the universality of the tension structure is far smaller than that of the rigid structure. The conventional tension structure system is mature, so more and more architects begin to explore new possible forms to adapt to more and more varied architectural shapes and functional arrangements, and it is important to provide a tension structure which can be applied under various limited conditions.

SUMMERY OF THE UTILITY MODEL

The present invention aims to provide a tension structure for overcoming the above-mentioned drawbacks of the prior art.

The purpose of the utility model can be realized through the following technical scheme:

a tension structure comprises a first rigid stay bar and a stay cable, wherein the first end part of the first rigid stay bar is movably connected to an external support structure through a stay bar connecting node, and the middle part of the stay cable is connected with the second end part of the first rigid stay bar; the upper end parts of the inhaul cables are connected to an external supported structure, and the lower end parts of the inhaul cables are connected to the external supporting structure; the first rigid support rod and the upper inhaul cable form a rotating plane of the first rigid support rod, and the support rod connecting node restrains the first rigid support rod from rotating out of plane relative to the rotating plane.

The utility model discloses well first rigidity vaulting pole constitutes a plane with the cable, rotates the plane promptly, and this is an unstable system, takes place to rotate the rotation outside the plane for preventing first rigidity vaulting pole, guarantees whole tension structure's stability.

The utility model discloses a tension structure still includes that first end passes through bracing piece connected node swing joint in external bearing structure's second rigidity vaulting pole, the second end of second rigidity vaulting pole connect in the external quilt bearing structure is last.

The structure is established through the gravity of the tension balance overhanging end of the inhaul cable in the tensioning system, but when the wind suction force of the upper surface of the cover body structure exceeds a certain limit value, the inhaul cable is loosened, and the tensioning structure does not have bearing capacity any more at the moment, which is a great design problem of the tensioning structure. The utility model discloses in increased the second rigidity vaulting pole of mending after one, the second rigidity vaulting pole of mending after through this provides reverse rigidity, makes the structure appear still remain stable under the circumstances that reverse atress, cable are lax, can make the supplementary cable atress of back benefit vaulting pole through reasonable construction order even, reduces cable tension to avoid the cable to relax.

The supporting rod connecting node comprises a node body fixedly connected with the external supporting structure, and a first pin shaft hole and a second pin shaft hole which are formed in the node body, wherein the first end portions of the first rigid supporting rod and the second rigid supporting rod are respectively in rotating connection with the first pin shaft hole and the second pin shaft hole through pin shafts, and the setting direction of the pin shafts is perpendicular to the rotating plane.

The first end of the first rigid stay bar is of a Y-shaped structure, and two first pin shaft holes matched with the Y-shaped structure are formed in the node body.

The inner end node of the stay bar is divided into two parts to be made into a Y shape, the two branch points can respectively rotate in two directions, but can only freely rotate in the plane when combined, and the rotation angle constraint is formed by the axial constraint of the two points outside the plane, so that the first rigid stay bar has the out-of-plane rotation constraint.

The node body is a buried plate fixed inside the external supporting structure.

The second end of the second rigid stay is arranged close to the connection point of the upper end of the inhaul cable on the external supported structure.

The tension structure is arranged at the outer contour of the external supported structure.

The lower inhaul cable is positioned in the rotating plane.

Compared with the prior art, the utility model has the advantages of it is following:

(1) the structure is simple and easy to install, and the building model and boundary conditions which are more flexible can be adapted, so that the design of the vertical face is more flexible and free of constraint;

(2) adopt unique bracing piece connected node structure, greatly improved tensile structure's off-plane stability.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of a destabilizing form of a first rigid stay bar according to the present invention;

fig. 3 is an axonometric view of the connection node of the support rod of the present invention;

fig. 4 is a schematic top view of the connection node of the support rod of the present invention;

FIG. 5 shows the stress mode of the structure under normal stress;

FIG. 6 is the structure stress mode of the present invention under the reverse stress condition;

fig. 7 is an isometric view of a stadium roof structure to which the present invention is applied;

FIG. 8 is an isometric view of a single roof truss structure of a stadium where the present invention is applied;

FIG. 9 is a simplified schematic diagram of a single roof truss structure of a stadium where the present invention is applied;

in the figure, 1 is a first rigid supporting rod, 2 is a second rigid supporting rod, 3 is a pulling cable, 4 is an external supported structure, 5 is a front supporting structure, 6 is a rear tensioning structure, 7 is an initial position, 8 is a destabilization rear position, 9 is a node body, and 10 is an external supporting structure.

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

Examples

A tensioning structure comprises a first rigid support rod 1, a second rigid support rod and a guy cable 3, wherein as shown in figure 1, the first end parts of the first rigid support rod 1 and the second rigid support rod are movably connected with a support rod connecting node which is fixed on an external support structure 10, the guy cable 3 is connected with the second end part of the first rigid support rod 1 in the middle of the guy cable 3, the upper end part of the guy cable 3 and the second end part of the second rigid support rod 2 are connected on an external supported structure 4, the connecting point of the second end part of the second rigid support rod 2 and the upper end part of the guy cable 3 on the external supported structure 4 is arranged close to each other, and the lower end part of the guy cable 3 is connected on the external support structure 10. The first rigid support rod 1 and the upper inhaul cable 3 form a rotation plane of the first rigid support rod 1, and the support rod connecting node restrains the first rigid support rod 1 from rotating out of plane relative to the rotation plane.

In this embodiment, the first rigid support rod 1 and the guy cable 3 form a tension structure system, due to the limitation of structural constraint conditions, the inner supporting point of the first rigid support rod 1 is located inside the connection line of the end points of the upper guy cable 3 and the lower guy cable 3, i.e. from theoretical mechanics analysis, the system formed by only the first rigid support rod 1 and the guy cable 3 is an unstable system, and the support rod is prone to out-of-plane instability, as shown in fig. 2, if there is no support rod connecting node to limit the first rigid support rod 1, the first rigid support rod 1 performs out-of-plane rotation relative to the rotation plane, as shown by the arrow in fig. 2, the first rigid support rod 1 pivots from the initial position 7 to the post-instability position. The problem of the out-of-plane stability of the supporting rod is solved, a supporting rod connecting node is added, the structure of the supporting rod connecting node is shown in fig. 3 and fig. 4, the supporting rod connecting node comprises a node body 9 fixedly connected with an external supporting structure 10, and a first pin shaft hole and a second pin shaft hole which are arranged on the node body 9, first end portions of a first rigid supporting rod 1 and a second rigid supporting rod 2 are respectively in rotating connection with the first pin shaft hole and the second pin shaft hole through pin shafts, and the setting direction of the pin shafts is perpendicular to a rotating plane. Moreover, the first end of the first rigid brace 1 is a Y-shaped structure, and two first pin hole holes matched with the Y-shaped structure are formed on the node body 9, wherein the node body 9 is a buried plate fixed inside the external support structure 10, and the external support structure 10 is a concrete frame. The supporting rod connecting node is simultaneously connected with the first rigid supporting rod 1 and the second rigid supporting rod 2, the inner end node of the first rigid supporting rod 1 is divided into two parts to form a Y shape, two branch points are in pin shaft forms of 2+1 (two pin shaft holes and a pin shaft), each point can be guaranteed to rotate freely in the plane, limited rotational freedom degrees are provided outside the plane, and the first rigid supporting rod 1 loses the rotation capability outside the plane after combination, but can still rotate freely in the plane. The inner ends of the second rigid support rods 2 are connected in a pin shaft mode, three pin shaft nodes are mutually noninterfere and are jointly distributed on the same buried plate, and the first rigid support rods 1 and the second rigid support rods 2 can be guaranteed to freely rotate and are mutually noninterfere.

In this embodiment, the second rigid brace 2 is used to provide reverse stiffness and improve the carrying capacity of the whole structure, as shown in fig. 5, in a normal stress mode, the tension system balances the gravity of the overhanging end (the gravity direction is shown by an arrow in fig. 5) through the tension of the cable 3 to make the structure stand, and maintain stability; however, when the wind suction force on the surface of the external supported structure 4 exceeds a certain limit value, the stress direction of the overhanging end is changed, as shown in fig. 6, the cable 3 will be loosened, at this time, the structure will become an unstable mechanism and no longer has a bearing capacity, which is a great design problem of the tension structure, therefore, a second rigid stay bar 2 which is supplemented afterwards is added in the embodiment, reverse rigidity is provided by the second rigid stay bar, the structure is reversely stressed, the cable 3 is still stable under the condition of loosening, even the cable 3 can be assisted by the second rigid stay bar through a reasonable construction sequence, the tension of the cable 3 is reduced, and the cable 3 is prevented from loosening. The device of the embodiment is particularly suitable for non-closed-loop, large-cantilever and single-trussed stadium buildings.

The tension structure of this embodiment is connected as a rear tension structure 6 to the outer contour of the external supported structure 4, the external supported structure 4 may be a roof of a stadium, as shown in fig. 7, and the external supporting structure 10 is a concrete structure of the whole stadium. The tension structure is used for balancing the gravity of the overhanging end and is installed at the end of the overhanging end as shown in fig. 8. in a simplified view, the roof of the stadium is installed on the external support structure 10 through the front support structure 5 and the tension structure of the embodiment. In the application example of the embodiment, the stadium is an open building with a non-closed loop, the plane projection is an elliptical ring shape, and the maximum length reaches 260 m. The maximum overhang of the stadium is nearly 40m, the vertical surface adopts flexible diamond grids, the rigidity in the surface is extremely weak, so that a tension system consisting of the cable supports behind the stadium can only balance the gravity of the overhang end, and the problem of wind suction force needs to be solved. Because the plane profile is oval, and for non-closed condition, leads to the unable bearing structure that arranges in vaulting pole both sides, this need be from establishing the tense structure of single pin, and vaulting pole inner adopts traditional articulated node (round pin axle, spherical steel support of antidetonation etc.) to analyze down the stability factor of vaulting pole only be 0.22, changes into the utility model provides a stability factor improves to 23.4 behind the special node.

The entire mechanism of this embodiment can be manufactured and assembled at the factory, shipped on site to be installed on the roof of the stadium, and the connection of the roof to the external support structure 10 such as concrete is completed. The second rigid stay bar 2 is a post-supplement stay bar and can be installed behind the stay cable after tensioning is completed, and the weakening of the rigid stay bar to the stay cable efficiency can be avoided. The rigid support rod 2 can be installed in two ways: (1) after the stay cable is tensioned, before a roof system is finished (additional constant load is applied), the second rigid stay bar 2 is installed, the second rigid stay bar 2 can bear larger tension for a long time in a normal use stage, the tension of the stay cable is reduced, and the pressure borne by the second rigid stay bar 2 is smaller under the action of wind load; or (2) the rigid brace is installed after the roofing system is finished, and the second rigid brace 2 is basically not stressed in the normal use stage, but the second rigid brace 2 needs to resist the whole wind load action under the wind load action.

Compared with the prior art, the utility model has the advantages of it is following: the method can adapt to more flexible building shapes and boundary conditions, so that the design of the vertical face is more flexible and free of constraint; the out-of-plane stability of the tension structure is greatly improved.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims

1. A tension structure is characterized by comprising a first rigid stay bar (1) and a guy cable (3), wherein the first end part of the first rigid stay bar is movably connected to an external support structure (10) through a support bar connecting node, and the middle part of the guy cable is connected with the second end part of the first rigid stay bar (1); the upper end part of the inhaul cable (3) is connected to the stress balance end of the external supported structure (4), and the lower end part of the inhaul cable (3) is connected to the external supporting structure (10); the first rigid support rod (1) and the upper inhaul cable (3) form a rotating plane of the first rigid support rod (1), and the support rod connecting node restrains the first rigid support rod (1) from rotating out of plane relative to the rotating plane.

2. A tension structure according to claim 1, further comprising a second rigid strut (2) having a first end movably connected to the ambient support structure (10) by a strut connecting node, the second end of the second rigid strut (2) being connected to the ambient supported structure (4).

3. A tension structure according to claim 2, wherein the support bar connecting joint comprises a joint body (9) fixedly connected with the external support structure (10), and a first pin shaft hole and a second pin shaft hole arranged on the joint body (9), the first end parts of the first rigid support bar (1) and the second rigid support bar (2) are respectively and rotatably connected with the first pin shaft hole and the second pin shaft hole through pin shafts, and the pin shafts are arranged in a direction perpendicular to the rotation plane.

4. A tensioning arrangement according to claim 3, characterized in that the first end of the first rigid stay (1) is a Y-shaped structure and the node body (9) is provided with two first pin holes matching the Y-shaped structure.

5. A tensioning construction according to claim 4, characterized in that the node body (9) is a buried plate fixed inside the surrounding supporting structure (10).

6. A tensioning arrangement according to claim 2, characterized in that the second end of the second rigid stay (2) is located close to the connection point of the upper end of the second rigid stay (2) on the external supported structure (4).

7. A tensioning arrangement according to claim 2, characterized in that it is mounted at the outer contour of the external supported structure (4).

8. A tensioning arrangement according to claim 1, characterized in that the lower cable (3) is located in the turning plane.