Beam string structure

Abstract

This utility model relates to a tensioned beam structure, belonging to the field of building engineering technology. The tensioned beam structure includes: an upper chord beam, a cable, a support rod, and a support column; the two ends of the cable are hinged to the two ends of the upper chord beam, and the two ends of the upper chord beam are respectively connected to the top of the support column through a first connecting support and a second connecting support. The first connecting support or the second connecting support is a unidirectional sliding support during the tensioning construction stage and is converted into a fixed support after construction is completed; the two ends of the support rod are respectively hinged to the adjacent first connecting member and the second connecting member.

Description

Technical Field

[0001] This utility model belongs to the field of building engineering technology, and specifically relates to a tensioned beam structure. Background Technology

[0002] Tensioned beam structures have become a rapidly developing new type of large-span structural system in recent years due to their light weight, large span, and high stiffness. The structure mainly consists of an upper chord beam, struts, and cables. The upper chord beam is a bending-resistant member with high stiffness, while the cables are flexible members with high strength. The struts are mainly used to connect the upper chord beam and the cables. Tensioned beam structures are mainly used in buildings such as large-span stadiums, airport terminals, exhibition halls, railway station waiting halls, and platform canopies.

[0003] Strong wind resistance is a crucial factor to consider for tensioned beam structures. Existing wind-resistant measures for tensioned beam structures mainly include ballast loading and the addition of wind-resistant cables. Ballast loading increases the self-weight of the structure by pouring concrete on the roof, while adding wind-resistant cables involves adding a steel cable at the top of the upper chord or inside the structure to apply a downward force to the tensioned beam. However, both of these measures increase the downward load on the tensioned beam structure. To ensure that the downward vertical load on the structure is always greater than the upward wind suction, for large-span roof structures, increasing the vertical load will inevitably lead to a greater load burden on the structure, resulting in increased material usage. Utility Model Content

[0004] Based on the above analysis, the present invention aims to provide a tensioned beam structure to solve the technical problems of large load and complex structure in the prior art.

[0005] The purpose of this utility model is achieved as follows: The first aspect of this utility model provides a tensioned beam structure, including: Upper chord beam, cables, support rods, and support columns; The two ends of the cable are hinged to the two ends of the upper chord beam. The two ends of the upper chord beam are respectively connected to the top of the support column through the first connecting support and the second connecting support. The first connecting support or the second connecting support is a one-way sliding support during the tensioning construction stage and is converted into a fixed support after the construction is completed. The two ends of the support rod are respectively hinged to the adjacent first connector and the second connector.

[0006] Furthermore, the cable is segmented, and multiple first connectors are provided on the axis of the upper chord beam. The first connector at the point where the curvature of the upper chord beam changes the most, as well as the first connector at the adjacent position, are directly hinged to one end of the two cable segments. The remaining cables are detachably connected to each other through second connectors.

[0007] Furthermore, the second connector is axially symmetrical and includes a first hinge plate and a second hinge plate. The first hinge plate has a first pin hole for hinged with the cable, and the second hinge plate has a second pin hole for hinged with the end of the support rod.

[0008] Furthermore, the first connecting member includes two third hinge plates arranged symmetrically on an axis, two hinge lugs are arranged at intervals at both ends of the support rod, and three hinge lugs are arranged at intervals at both ends of the second and third hinge plates. The hinge lugs of the support rod are hinged to the hinge lugs of the second and third hinge plates by pins.

[0009] Furthermore, the first hinge plate and the second hinge plate are integrally formed. The first hinge plate has two axes of symmetry, and the second hinge plate has one axis of symmetry. One of the axes of symmetry of the first hinge plate and the axis of symmetry of the second hinge plate coincide with the axis of symmetry of the second connector. The other axis of symmetry of the first hinge plate is perpendicular to the axis of symmetry of the second connector.

[0010] Furthermore, the end of the cable is connected to a cable head lug plate, which is hinged to the first hinge plate by a pin passing through the first pin hole.

[0011] Furthermore, each section of the cable is equipped with a length adjustment mechanism for adjusting the cable tension of each section.

[0012] Furthermore, the bottom of the first connecting support or the second connecting support is provided with a one-way sliding displacement box, which includes a base plate, a limiting steel plate and a hook.

[0013] Furthermore, the hook is set close to the first connecting support or the second connecting support, and the interval between the limiting steel plates is greater than the width of the first connecting support or the second connecting support.

[0014] Furthermore, the support column has lateral stiffness and is used to provide horizontal elastic support when the tensioned beam structure is subjected to wind suction, so that the upper chord beam and the support column can share the force together.

[0015] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: The structure includes an upper chord beam, cables, and support rods. The two ends of the cables are hinged to the two ends of the upper chord beam. Multiple first connectors are provided along the axis of the upper chord beam, and multiple second connectors are provided along the axis of the cables. The two ends of the support rods are hinged to adjacent first and second connectors to form a triangular grid between the upper chord beam and the cables.

[0016] The tensioned beam structure provided by this utility model forms a stable triangular grid system by segmenting the cables and connecting the staggered first and second connectors with support rods. This structural system enhances the stiffness of the structure under uneven load conditions, thereby effectively reducing the structure's self-weight and material usage. By hinged the first connector at the point of maximum curvature change in the upper chord beam and the adjacent first connectors to the cables, the force transmission path is optimized, significantly improving the structure's stress efficiency. By optimizing the constraint method of the supports at different stages, during the tensioning stage, sliding one end of the support can achieve self-balance between the tension of the tensioned beam cables and the pressure of the upper chord beam, avoiding excessive horizontal load on the top of the support column and reducing the initial internal force of the support column. After tensioning, the supports become fixed supports, and the support column and the tensioned beam work together to bear the force. The lateral stiffness of the support column provides horizontal elastic support, ensuring that the upper chord beam can still form a stable suspended structural system even when subjected to excessive wind suction. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the planar structure of the tensioned beam structure provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of the second connector provided in Embodiment 1 of the present invention; Figure 3 This is a partially enlarged view of the tensioned beam structure provided in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the structure of the first connector provided in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the structure of the first connecting support or the second connecting support provided in Embodiment 1 of the present invention; Figure 6 This is a three-dimensional structural diagram of the tensioned beam structure provided in Embodiment 1 of the present invention.

[0019] Figure label: 1-Upper chord beam; 11-First connecting piece; 110-Third hinge plate; 12-First connecting support; 13-Second connecting support; 2-Cable; 21-Second connecting piece; 210-First hinge plate; 210a-First pin hole; 211-Second hinge plate; 211a-Second pin hole; 22-Cable head lug plate; 3-Support rod; 4-Support column; 5-One-way sliding displacement box; 50-Base plate; 51-Limiting steel plate; 52-Hook. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. It should be noted that, without conflict, the implementation methods and features in the implementation methods of this disclosure can be combined, separated, interchanged, and / or rearranged. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Example 1 A specific embodiment of the present invention, such as Figure 1-6 As shown, a tensioned beam structure resistant to strong winds is disclosed, comprising: Upper chord beam 1, cable 2, support rod 3, and support column 4; The two ends of the cable 2 are hinged to the two ends of the upper chord beam 1. The two ends of the upper chord beam 1 are respectively connected to the top of the support column 4 through the first connecting support 12 and the second connecting support 13. The first connecting support 12 or the second connecting support 13 is a one-way sliding support during the tensioning construction stage, and is converted into a fixed support after the construction is completed. The cable 2 is segmented, and multiple first connectors 11 are provided on the axis of the upper chord beam 1. The first connector 11 at the point of maximum curvature change of the upper chord beam 1 and the first connector 11 at the adjacent position are directly hinged to one end of the two cable segments 2. The remaining cables 2 are detachably connected to each other through second connectors 21. The two ends of the support rod 3 are respectively hinged to the adjacent first connector 11 and second connector 21.

[0022] Specifically, the upper chord beam 1 is made of high-strength steel with high bending stiffness to bear the roof load. The cable 2 is composed of multiple high-strength steel cables connected by the second connector 21 to achieve segmented installation and independent cable force adjustment. The support rod 3 is usually a steel pipe to transfer load and maintain structural stability. The first connector 11 is fixed at a specific position on the lower surface of the upper chord beam 1 according to mechanical analysis, rather than being completely uniformly distributed. The first connector 11 at the point of greatest curvature change of the upper chord beam and the first connector 11 at adjacent positions are directly hinged to the cable 2 to optimize the principal stress transfer path. The second connector 21 is located at the segmented connection of the cable 2. The projection points of the first connector 11 and the second connector 21 are staggered, forming a stable triangular grid system together with the support rod 3, effectively improving the overall stiffness and wind resistance of the structure.

[0023] Compared with existing technologies, the wind-resistant tensioned beam structure provided in this embodiment forms a stable triangular grid system by segmenting the cables and connecting the staggered first and second connectors with support rods. This structural system enhances the stiffness of the structure under uneven load conditions, thereby effectively reducing the structure's self-weight and material usage. By hinged the first connector at the point of maximum curvature change in the upper chord beam and the adjacent first connectors to the cables, the force transmission path is optimized, significantly improving the structure's stress efficiency. By optimizing the constraint method of the supports at different stages, during the construction tensioning stage, sliding one end of the support can achieve self-balance between the tension of the tensioned beam cables and the pressure of the upper chord beam, avoiding excessive horizontal loads on the top of the support columns and reducing the initial internal forces of the support columns. After tensioning and forming, the supports become fixed supports, and the support columns and tensioned beams work together to bear the force. The lateral stiffness of the support columns provides horizontal elastic support, ensuring that the upper chord beam can still form a stable suspended structural system even when subjected to excessive wind suction.

[0024] In this embodiment, the second connector 21 is axially symmetrical and includes a first hinge plate 210 and a second hinge plate 211. The first hinge plate 210 is provided with a first pin hole 210a for hinged with the cable 2, and the second hinge plate 211 is provided with a second pin hole 211a for hinged with the end of the support rod 3.

[0025] Specifically, such as Figure 2 As shown, the second connector 21 has an overall axisymmetric structure. The first hinge plate 210 and the second hinge plate 211 are integrally formed by welding or casting. The first hinge plate 210 is provided with two first pin holes 210a for hinged with the cable head ear plate 22 at the end of the cable 2. The second hinge plate 211 is provided with a second pin hole 211a for hinged with the lower end of the support rod 3.

[0026] In this embodiment, the first hinge plate 210 and the second hinge plate 211 are integrally formed. The first hinge plate 210 has two axes of symmetry, and the second hinge plate 211 has one axis of symmetry. One of the axes of symmetry of the first hinge plate 210 and the axis of symmetry of the second hinge plate 211 coincide with the axis of symmetry of the second connector 21. The other axis of symmetry of the first hinge plate 210 is perpendicular to the axis of symmetry of the second connector 21.

[0027] Specifically, such as Figure 2 As shown, the first hinge plate 210 is rectangular and has two mutually perpendicular axes of symmetry, one of which coincides with the axis of symmetry of the second connector 21 and the other is perpendicular to it; the second hinge plate 211 is trapezoidal and has one axis of symmetry, which coincides with the axis of symmetry of the second connector 21, to ensure that the second connector 21 is balanced when subjected to force and to avoid local stress concentration.

[0028] In this embodiment, the end of the cable 2 is connected to a cable head lug plate 22, and the cable head lug plate 22 is hinged to the first hinge plate 210 by a pin passing through the first pin hole 210a.

[0029] In this embodiment, the first connecting member 11 includes two third hinge plates 110 arranged symmetrically on an axis. Two hinge lugs are arranged at intervals at both ends of the support rod 3. Three hinge lugs are arranged at intervals at both ends of the second hinge plate 211 and the third hinge plate 110. The hinge lugs of the support rod 3 are hinged to the hinge lugs of the second hinge plate 211 and the third hinge plate 110 through pins.

[0030] Specifically, such as Figure 4 As shown, the first connecting member 11 is fixed to the lower surface of the upper chord beam 1, including two parallel third hinge plates 110. The third hinge plates 110 have pin holes. Both ends of the support rod 3 are provided with double ear plates. The second hinge plate 211 and the third hinge plate 110 are both provided with three ear plates. During installation, the double ear plates of the support rod 3 are inserted into the gap between the three ear plates of the second hinge plate 211 or the third hinge plate 110, and connected by pins to form a stable clamp-type hinge node. Figure 3 and Figure 4 As shown, this connection method allows the support rod 3 to rotate flexibly within the force plane, effectively adapting to the deformation of the structure under wind load and tension, and also has a certain bending stiffness outside the force plane, which can limit the outward swing of the support rod.

[0031] In this embodiment, each section of the cable 2 is provided with a length adjustment mechanism to adjust the cable force of each section of the cable 2.

[0032] For example, the length adjustment mechanism is an adjusting sleeve and a hydraulic tensioner, which are set in the middle of the cable 2. By rotating the adjusting sleeve and operating the hydraulic tensioner, the length of the cable 2 can be finely adjusted, thereby precisely controlling the prestress of each section of the cable 2, ensuring uniform distribution of the overall cable force, and improving structural stability.

[0033] In this embodiment, the bottom of the first connecting support 1 or the second connecting support 13 is provided with a one-way sliding displacement box 5, which includes a base plate 50, a limiting steel plate 51 and a hook 52.

[0034] In this embodiment, the hook 52 is disposed close to the first connecting support 12 or the second connecting support 13, and the spacing between the limiting steel plates 51 is greater than the width of the first connecting support 12 or the second connecting support 13. In this embodiment, the support column 4 has lateral stiffness and is used to provide horizontal elastic support to the tensioned beam structure when it is subjected to wind suction, so that the upper chord beam 1 and the support column 4 cooperate in bearing the force.

[0035] Specifically, the first connecting support 12 and the second connecting support 13 are respectively installed at both ends of the upper chord beam 1 for hinged connection with the support column 4. One is a fixed support, and the other is a one-way sliding support. The one-way sliding support achieves its sliding function through a one-way sliding displacement box set at its bottom. A gap is left between the two limiting steel plates of the displacement box along the axis of the upper chord beam 1 (i.e., the sliding direction) and the support, allowing limited sliding in this direction; a hook is provided along the non-sliding direction to bear the upward pull force that may be caused by wind load. The limiting steel plates in the sliding direction are temporarily fixed by bolts to limit the sliding range of the support during construction tensioning. After the cable tensioning is completed and the roof panel is installed in place, the limiting steel plates in the sliding direction are removed, and the support base plate and the displacement box base plate are welded together, so that the support changes from a temporary sliding state to a fixed state, ensuring the final structural shape.

[0036] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A tensioned beam structure, characterized in that, include: Upper chord beam (1), cable (2), support rod (3) and support column (4); The two ends of the cable (2) are hinged to the two ends of the upper chord beam (1). The two ends of the upper chord beam (1) are connected to the top of the support column (4) through the first connecting support (12) and the second connecting support (13) respectively. The first connecting support (12) or the second connecting support (13) is a one-way sliding support during the tensioning construction stage, and is converted into a fixed support after the construction is completed. The two ends of the support rod (3) are hinged to the adjacent first connector (11) and second connector (21), respectively.

2. The tensioned beam structure according to claim 1, characterized in that, The cable (2) is segmented, and multiple first connectors (11) are provided on the axis of the upper chord beam (1). The first connector (11) at the point where the curvature of the upper chord beam (1) changes the most and the first connector (11) at the adjacent position are directly hinged to one end of the two cable segments (2). The remaining cables (2) are detachably connected to each other through second connectors (21).

3. The tensioned beam structure according to claim 2, characterized in that, The second connector (21) is axially symmetrical and includes a first hinge plate (210) and a second hinge plate (211). The first hinge plate (210) is provided with a first pin hole (210a) for hinged with the cable (2), and the second hinge plate (211) is provided with a second pin hole (211a) for hinged with the end of the support rod (3).

4. The tensioned beam structure according to claim 3, characterized in that, The first connector (11) includes two third hinge plates (110) arranged symmetrically on an axis. Two hinge ear plates are arranged at intervals at both ends of the support rod (3). Three hinge ear plates are arranged at intervals at both ends of the second hinge plate (211) and the third hinge plate (110). The hinge ear plates of the support rod (3) are hinged to the hinge ear plates of the second hinge plate (211) and the third hinge plate (110) through pins.

5. The tensioned beam structure according to claim 3, characterized in that, The first hinge plate (210) and the second hinge plate (211) are integrally formed. The first hinge plate (210) has two axes of symmetry, and the second hinge plate (211) has one axis of symmetry. One of the axes of symmetry of the first hinge plate (210) and the axis of symmetry of the second hinge plate (211) coincide with the axis of symmetry of the second connector (21). The other axis of symmetry of the first hinge plate (210) is perpendicular to the axis of symmetry of the second connector (21).

6. The tensioned beam structure according to claim 3, characterized in that, The end of the cable (2) is connected to a cable head lug plate (22), which is hinged to the first hinge plate (210) by a pin passing through the first pin hole (210a).

7. The tensioned beam structure according to any one of claims 1-6, characterized in that, Each section of the cable (2) is provided with a length adjustment mechanism for adjusting the cable force of each section of the cable (2).

8. The tensioned beam structure according to claim 1, characterized in that, The bottom of the first connecting support (12) or the second connecting support (13) is provided with a one-way sliding displacement box (5), which includes a base plate (50), a limiting steel plate (51) and a hook (52).

9. The tensioned beam structure according to claim 8, characterized in that, The hook (52) is set close to the first connecting support (12) or the second connecting support (13), and the interval between the limiting steel plates (51) is greater than the width of the first connecting support (12) or the second connecting support (13).

10. The tensioned beam structure according to claim 1, characterized in that, The support column (4) has lateral stiffness and is used to provide horizontal elastic support when the tensioned beam structure is subjected to wind suction, so that the upper chord beam (1) and the support column (4) can work together to bear the force.

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