Cable-stayed grid structure

Abstract

The utility model relates to the technical field of grid structures, in particular to a cable-stayed grid structure. Comprising a net rack body with an arch-shaped section and a double-layer structure which is divided into an upper chord layer and a lower chord layer; the supporting columns are connected with the lower chord layer and are suitable for supporting the lower chord layer; the cable-stayed assembly comprises a mast and a stay cable arranged on the mast, and the top end of the mast is higher than the top end of the net rack body. The mast and the inhaul cable are added on the basis of supporting of the supporting columns, tension is applied to the net rack body through the mast and the inhaul cable, stress of the supporting columns is reduced, and then the steel consumption is reduced. The string structure is formed by the string inhaul cable and the net rack body through the five cable clamp nodes, the structure is a building structure which is reasonable in stress and convenient to construct, and the tensile property of the inhaul cable is fully utilized.

Description

Technical Field

[0001] The utility model relates to the technical field of grid structures, and particularly relates to a cable-stayed grid structure. Background Art

[0002] Among many forms of long-span space steel structures, the grid structure can effectively bear various loads. With advantages such as light self-weight, material saving, high strength, good safety, and convenient fabrication and installation, it has become one of the fastest-developing forms at present, and its application is extensive and popular.

[0003] However, the existing grid structure is supported by support columns for the grid body. In this way, only supported by the support columns, the stress on the support columns is large, and the strength requirement for the support columns is high, resulting in a relatively large amount of steel used. Summary of the Utility Model

[0004] Therefore, the utility model aims to overcome the technical problem of being only supported by support columns in the prior art, and thus provides a cable-stayed grid structure.

[0005] The utility model provides a cable-stayed grid structure, including:

[0006] A grid body, with an arched cross-section and a double-layer structure, divided into an upper chord layer and a lower chord layer;

[0007] Support columns, several in number, the support columns are connected to the lower chord layer and are suitable for supporting the lower chord layer;

[0008] A cable-stayed assembly, including a mast and cables arranged on the mast, the top of the mast is higher than the top of the grid body;

[0009] One end of the mast is arranged on the ground, and the other end is provided with a cable, and the cable is connected to the grid body.

[0010] Further, the grid body is a square pyramid welded spherical joint grid placed upright. The welded joints located in the upper chord layer are upper chord layer joints, and the welded joints located in the lower chord layer are lower chord layer joints.

[0011] Further, the middle part of the grid body is rectangular, and both sides are arc-shaped;

[0012] The grid body has two symmetry axes, namely the major axis in the length direction and the minor axis in the width direction respectively.

[0013] Further, steel frames are respectively arranged on both end sides of the grid body in the major axis direction. The top of the steel frame is connected to the lower chord layer joints at both end sides of the grid body in the major axis direction, the bottom end of the steel frame is connected to one end of the support column, and the other end of the support column is arranged on the ground.

[0014] Further, reinforced concrete frames are respectively arranged on two end sides of the grid framework body in the short-axis direction. The reinforced concrete frames are arranged on the ground, and support columns are connected between the top ends of the reinforced concrete frames and the nodes of the lower chord layer of the grid framework body.

[0015] Further, the grid framework body further includes:

[0016] A strut group, including four struts. The upper ends of the four struts are respectively connected to the nodes of the lower chord layer. The lower ends of the four struts are connected together and provided with a cable clamp to form a cable clamp node.

[0017] Further, there are five groups of the strut groups, which are distributed on the long axis and are symmetric about the short axis.

[0018] Further, there are two masts, which are respectively arranged on two end sides of the grid framework body in the long-axis direction. The two masts are symmetric about the short axis. The bottom ends of the masts are arranged on the ground, and the top ends of the masts are farther from the grid framework body than the bottom ends. The included angle between the masts and the ground is 70° - 80°.

[0019] Further, the stay cables are divided into anchor stay cables, tie stay cables and beam string stay cables;

[0020] Among them, there are two groups of the anchor stay cables, which are respectively arranged on two end sides of the grid framework body in the long-axis direction and are symmetric about the short axis; the number of the anchor stay cables in each group of the anchor stay cables is two and they are symmetric about the long axis. One end of the anchor stay cable is connected to the top end of the mast, and the other end is connected to the ground;

[0021] There are two groups of the tie stay cables, which are respectively arranged on the long axis of the grid framework body and are symmetric about the short axis; the number of the tie stay cables in each group of the tie stay cables is two and they are symmetric about the long axis. One end of the tie stay cable is connected to the top end of the mast, and the other end is connected to the nodes of the upper chord layer.

[0022] Further, one end of the beam string stay cable is connected to the top end of one of the masts. The beam string stay cable passes from above the upper chord layer to the lower chord layer and is respectively connected to five cable clamp nodes. The other end of the beam string stay cable is connected to the top end of the other mast.

[0023] The technical solution of the present utility model has the following advantages:

[0024] A cable-stayed grid structure provided by the utility model comprises a grid body, which has an arched cross-section and is a double-layer structure, divided into an upper chord layer and a lower chord layer; there are several support columns, and the support columns are connected to the lower chord layer and are suitable for supporting the lower chord layer; a cable-stayed assembly, including a mast and cables arranged on the mast, and the top of the mast is higher than the top of the grid body. In this application, on the basis of the support of the support columns, a mast and cables are added, and the mast and cables apply tensile force to the grid body, reducing the stress on the support columns and thus reducing the steel consumption. The cable-supported cable forms a cable-supported structure with the grid body through five cable clamp nodes, which is a building structure form with reasonable force and convenient construction, and makes full use of the tensile performance of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of the present utility model;

[0027] Figure 2 It is a schematic plan view of the present utility model;

[0028] Figure 3 It is a schematic diagram of the position of the cable-supported cable of the present utility model;

[0029] Figure 4 It is a schematic structural diagram of the grid body of the present utility model.

[0030] Description of the reference numerals in the drawings;

[0031] 1. Grid body; 2. Upper chord layer; 3. Lower chord layer; 4. Support column; 5. Mast; 6. Steel frame; 7. Reinforced concrete frame; 8. Strut group; 9. Anchor cable; 10. Tie cable; 11. Cable-supported cable. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following will clearly and completely describe the technical solutions of the present utility model in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model fall within the protection scope of the present utility model.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0036] Embodiment

[0037] As Figures 1 to 4 shown in a specific embodiment of a cable-stayed grid structure, the cable-stayed grid structure includes:

[0038] A grid body 1, with an arched cross-section and a double-layer structure, divided into an upper chord layer 2 and a lower chord layer 3; the grid body 1 can be made of seamless steel pipes for structures or straight-seam pipes for structures. The maximum cross-sectional dimension of the pipes can be D299×20mm, and the minimum cross-sectional dimension can be D75.5×3.75mm. The thickness of the grid body 1 can be 4793mm.

[0039] Support columns 4, several in number, the support columns 4 are connected to the lower chord layer 3 and are suitable for supporting the lower chord layer 3;

[0040] A cable-stayed assembly, including a mast 5 and cables arranged on the mast 5, the top of the mast 5 is higher than the top of the grid body 1;

[0041] One end of the mast 5 is set on the ground, and a guy wire is set at the other end. The guy wire is connected to the grid structure body 1. In this application, on the basis of the support of the support column 4, the mast 5 and the guy wire are added. The mast 5 and the guy wire apply a tensile force to the grid structure body 1, reducing the stress on the support column 4, and thus reducing the steel consumption. It should be noted that in the prior art, the relatively large steel consumption is used for increasing the compressive strength of the support column 4 on the one hand and for force-bearing requirements on the other hand. In order to make the force on the support column 4 more reasonable and the force on the grid structure body 1 better, the steel consumption of the grid structure body 1 is increased.

[0042] Further, the grid structure body 1 is a welded spherical joint grid with regular square pyramids placed upright. The welded joints located in the upper chord layer 2 are upper chord layer joints, and the welded joints located in the lower chord layer 3 are lower chord layer joints. It should be noted that if a skylight is set in the central position, a skylight layer needs to be set above the upper chord layer 2, and its structure is also a welded spherical joint grid with regular square pyramids placed upright and is connected to the upper chord layer 2.

[0043] Further, the middle part of the grid structure body 1 is rectangular, and both sides are arc-shaped;

[0044] The grid structure body 1 has two symmetry axes, namely the major axis in the length direction and the minor axis in the width direction. It can be considered that the grid structure body 1 is nearly elliptical, symmetrically arranged about the 1 / 4 of the plane center line. The length of the major axis can be 131037 mm, and the length of the minor axis can be 87910 mm. The cross-section in the major axis direction is arched, with a rise of 6021 mm; the cross-section in the minor axis direction is also arched, with a rise of 5748 mm.

[0045] Further, steel frames 6 are respectively arranged on both end sides of the grid structure body 1 in the major axis direction. The top end of the steel frame 6 is connected to the lower chord layer joints at the end sides of the grid structure body 1 in the major axis direction, and the bottom end of the steel frame 6 is connected to one end of the support column 4. The other end of the support column 4 is set on the ground. The support form of the grid structure body 1 is multi-point support at the lower chord. The support columns 4 connected to each steel frame 6 can be spherical steel support columns 4, and the number is 6, supporting the lower chord layer joints at the boundary of the grid structure body 1.

[0046] Further, reinforced concrete frames 7 are respectively arranged on both end sides of the grid structure body 1 in the minor axis direction. The reinforced concrete frames 7 are set on the ground, and there is a support column 4 connected between the top end of the reinforced concrete frame 7 and the lower chord layer joints of the grid structure body 1. The support columns 4 connected to each reinforced concrete frame 7 can be spherical steel support columns 4, and the number is 8, supporting the lower chord layer joints at the boundary of the grid structure body 1. The unidirectional sliding distance of the spherical steel support columns 4 arranged in the minor axis direction along the minor axis direction is greater than or equal to 120 mm. Among them, the reinforced concrete frame 7 can be considered as a grandstand.

[0047] Furthermore, the grid frame body 1 further includes:

[0048] The stay rod group 8 includes four stay rods. The upper ends of the four stay rods are respectively connected to the lower chord layer nodes. The lower ends of the four stay rods are connected together and provided with a cable clamp to form a cable clamp node. The cable clamp is an existing device and an existing structure, which will not be elaborated. When the cable and the stay rod are arranged on the cable clamp, the cable is fixedly connected to the cable clamp, and the stay rod and the cable clamp are hinged.

[0049] Furthermore, there are five groups of the stay rod groups 8, which are distributed on the long axis and are symmetric about the short axis.

[0050] Furthermore, there are two masts 5, which are respectively arranged on the two end sides of the grid frame body 1 in the long axis direction. The two masts 5 are symmetric about the short axis. The bottom end of the mast 5 is arranged on the ground. The top end of the mast 5 is farther from the grid frame body 1 than the bottom end. The included angle between the mast 5 and the ground is 70° - 80°, and it can be selected as 73° in this embodiment.

[0051] Furthermore, the cables are divided into the anchor ground cables 9, the tie cables 10 and the beam string cables 11;

[0052] Among them, there are two groups of the anchor ground cables 9, which are respectively arranged on the two end sides of the grid frame body 1 in the long axis direction and are symmetric about the short axis; the number of the anchor ground cables 9 in each group of the anchor ground cables 9 is two and they are symmetric about the long axis. One end of the anchor ground cable 9 is connected to the top end of the mast 5, and the other end is connected to the ground; in the horizontal plane, the distance between the cable anchoring point of the anchor ground cable 9 and the top of the mast 5 in the long axis direction can be 18850 mm, and the distance in the short axis direction can be 19150 mm. The anchor ground cable 9 can be arranged on the ground through an anchor. The anchor ground cable 9 can apply a pulling force to the mast 5 so that the mast 5 can bear more pulling forces brought by the tie cables 10 and the beam string cables 11.

[0053] There are two groups of the tie cables 10, which are respectively arranged on the grid frame body 1 in the long axis direction and are symmetric about the short axis; the number of the tie cables 10 in each group of the tie cables 10 is two and they are symmetric about the long axis. One end of the tie cable 10 is connected to the top end of the mast 5, and the other end is connected to the upper chord layer node. The tie cable 10 is tied to the upper chord layer node. In the horizontal plane, the distance between the tying point and the top of the mast 5 in the long axis direction can be 60300 mm, and the distance in the short axis direction can be 23782 mm. The tie cable 10 can lift the grid frame body 1 and apply an upward discrete pulling force to reduce the stress on the support column 4.

[0054] Furthermore, one end of the cable-strut cable 11 is connected to the top end of one of the masts 5. The cable-strut cable 11 passes from above the upper chord layer 2 to the lower chord layer 3 and is respectively connected to five cable clamp nodes. The other end of the cable-strut cable 11 is connected to the top end of the other mast 5. The 3rd cable clamp node may be located at the center of the space truss body 1. The 1st and 2nd cable clamp nodes are axisymmetric with the 5th and 4th cable clamp nodes respectively about the short axis. The distance between the 1st and 2nd cable clamp nodes in the long axis direction may be 13815 mm, and the distance between the 2nd and 3rd cable clamp nodes in the long axis direction may be 26185 mm. The cable-strut cable 11 forms a cable-strut structure with the space truss body 1 through five cable clamp nodes, which is a building structure form with reasonable force and convenient construction, making full use of the tensile performance of the cable. It also makes the force of the space truss body 1 more reasonable and can reduce the steel consumption of the space truss body 1.

[0055] In addition, the cable can be a semi-parallel steel wire bundle cable. The steel wire is a low-relaxation hot-dip galvanized steel wire with a diameter of 75 mm and a strength grade of 1670 MPa, and the elastic modulus is not less than 1.9x105 MPa. The cable is composed of 121 steel wires, and the breaking load ≥ 77603900 kN. Two layers of PE protective layers are provided outside the cable. Before tensioning, a full-process simulation calculation of the prestress construction should be carried out, and the over-tensioning value should be determined considering the prestress loss. The cable tensioning force is determined according to a special construction plan formulated by the full-process simulation analysis to determine the specific actual cable force at each step. The cable tensioning adopts double-index control of internal force and displacement. The anchor is a cold-cast anchor, which is integrally manufactured. The strut is D180x10, and the material is Q355B. The anchor and related accessories are hot-dip galvanized for anti-corrosion, and the thickness of the galvanized layer is not less than 120 um.

[0056] The vertical height of the mast 5 can be 49.5 m. The specification of the mast 5 is D(1000~2000~1000)×30, and the material is Q355C-NH. The mast 5 has an equal cross-section within 7.5 m above and below its length center, and the rest is a uniform variable cross-section and gradually tapers.

[0057] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the creation of the present utility model.

Claims

1. A cable-stayed grid structure, characterized in that, Comprising: A grid frame body (1) with an arched cross-section and a double-layer structure, which is divided into an upper chord layer (2) and a lower chord layer (3); Support columns (4), there are several of them, and the support columns (4) are connected to the lower chord layer (3) and are suitable for supporting the lower chord layer (3); A cable-stayed assembly, including a mast (5) and cables arranged on the mast (5), and the top of the mast (5) is higher than the top of the grid frame body (1); One end of the mast (5) is arranged on the ground, and the other end is provided with a cable, and the cable is connected to the grid frame body (1).

2. The cable-stayed grid structure according to claim 1, characterized in that, The grid frame body (1) is a square pyramid welded spherical joint grid frame placed normally. The welded joints located in the upper chord layer (2) are upper chord layer joints, and the welded joints located in the lower chord layer (3) are lower chord layer joints.

3. The cable-stayed grid structure according to claim 2, characterized in that, The middle part of the grid frame body (1) is rectangular, and both sides are arc-shaped; The grid frame body (1) has two symmetry axes, namely the major axis in the length direction and the minor axis in the width direction respectively.

4. The cable-stayed grid structure according to claim 3, wherein Steel frames (6) are respectively arranged on the two end sides of the grid frame body (1) in the major axis direction. The top of the steel frame (6) is connected to the lower chord layer joints on the end sides of the grid frame body (1) in the major axis direction, the bottom end of the steel frame (6) is connected to one end of the support column (4), and the other end of the support column (4) is arranged on the ground.

5. The cable-stayed grid structure according to claim 3, wherein, Reinforced concrete frames (7) are respectively arranged on the two end sides of the grid frame body (1) in the minor axis direction. The reinforced concrete frames (7) are arranged on the ground, and there is a support column (4) connected between the top of the reinforced concrete frame (7) and the lower chord layer joints of the grid frame body (1).

6. The cable-stayed grid structure according to claim 2, characterized in that, The grid frame body (1) further includes: A strut group (8), including four struts. The upper ends of the four struts are respectively connected to the lower chord layer joints, and the lower ends of the four struts are connected together and provided with a cable clamp to form a cable clamp joint.

7. The cable-stayed grid structure according to claim 6, wherein There are five groups of the strut groups (8), which are distributed on the major axis and are symmetric about the minor axis.

8. The cable-stayed grid structure according to claim 3, characterized in that, There are two masts (5), which are respectively arranged on the two end sides of the grid frame body (1) in the major axis direction. The two masts (5) are symmetric about the minor axis. The bottom end of the mast (5) is arranged on the ground, the top end of the mast (5) is farther from the grid frame body (1) than the bottom end, and the included angle between the mast (5) and the ground is 70° - 80°.

9. The cable-stayed grid structure according to claim 3, characterized in that The cables are divided into anchor cables (9), tie cables (10) and cable-strut cables (11); Among them, there are two groups of the anchor cables (9), which are respectively arranged on the two end sides of the grid frame body (1) in the major axis direction and are symmetric about the minor axis; the number of anchor cables (9) in each group of anchor cables (9) is two and they are symmetric about the major axis. One end of the anchor cable (9) is connected to the top end of the mast (5), and the other end is connected to the ground; There are two groups of the tie cables (10), which are respectively arranged on the grid frame body (1) in the major axis direction and are symmetric about the minor axis; the number of tie cables (10) in each group of tie cables (10) is two and they are symmetric about the major axis. One end of the tie cable (10) is connected to the top end of the mast (5), and the other end is connected to the upper chord layer joints.

10. The cable-stayed grid structure according to claim 9, characterized in that, One end of the cable-strut (11) is connected to the top end of one of the masts (5). The cable-strut (11) passes from above the upper chord layer (2) to the lower chord layer (3) and is respectively connected to five cable clamp nodes. The other end of the cable-strut (11) is connected to the top end of the other mast (5).

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