A long-span beam structure combining an arch beam and a beam string

Abstract

This invention relates to a large-span beam structure combining an arched beam and a tensioned beam, employing an inner arch and outer chord configuration. The large-span beam structure mainly includes: a rigid upper chord member, flexible cables, an arch ring, arch foot connectors, struts, hinged supports, anti-slip connectors, and locking devices. The rigid upper chord member, flexible cables, and struts form a conventional tensioned beam. The arch ring is arranged between adjacent struts and is assembled with the struts via arch foot connectors. This invention adds an arch ring inside the conventional tensioned beam structure, forming a spatial truss with the rigid upper chord member, thereby enhancing the stiffness and stability of the tensioned beam structure and reducing the risk of out-of-plane instability. Simultaneously, the internal arch structure increases the internal span of the rigid upper chord member, reduces the number of struts, and shortens the strut length. The large-span beam structure of this invention has a smaller beam height and height-to-span ratio, providing more usable space for engineering projects.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a large-span beam structure combining arch beams and tensioned beams. Background Technology

[0002] Tensioned beam structures are self-balancing systems that fully utilize the properties of both rigid and flexible materials. They are characterized by their simple structure, clear force distribution, and strong spanning capacity, making them a common large-span prestressed spatial structure system in building engineering. However, the rigid upper chord of a tensioned beam is prone to concave deformation under significant external forces, leading to out-of-plane instability and failure.

[0003] Arch beam structures have advantages such as simple construction, good overall stiffness, clear force transmission, safety and reliability, and convenient construction. They can withstand large loads and have strong spanning capacity. However, compared with tensioned beams, they require more materials and are less economical.

[0004] Tensioned beam structures and arch beam structures each have their own advantages, but also some shortcomings. Therefore, it is necessary to propose a more optimized solution to address the above issues. Summary of the Invention

[0005] To overcome the shortcomings of the aforementioned prefabricated components, this invention provides a large-span beam structure that combines arch beams and tensioned beams, retaining the advantages of strong deformation resistance of arch beams and good economy of tensioned beams, thereby improving the safety and practicality of conventional tensioned beam structures.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A large-span beam structure combining arch beams and tensioned beams, characterized in that: the components constituting the large-span beam structure include: upper chord rigid components, flexible cables, arch rings, arch foot connectors, struts, hinge supports, anti-slip connectors, and locking devices;

[0008] The large-span beam structure consists of an arched beam structure and a tensioned beam structure;

[0009] One end of the strut is fixed to the upper chord rigid member, and the other end is connected to the hinge support;

[0010] The flexible cable passes through the hinge support, and its two ends are locked by a locking device connected to the upper chord rigid member to form a tensioned beam structure;

[0011] The arch rings are connected to the struts via arch foot connectors, and multiple arch rings form a continuous arch, which together with the upper chord rigid members form an arch beam structure.

[0012] The horizontal component of the force at the non-free end of the arch ring is balanced by the adjacent arch ring, and the horizontal component of the force at the free end of the arch ring is balanced by the anti-slip connector connected to the strut.

[0013] The vertical component of the arch ring is transmitted to the flexible cable through the struts and hinged supports, and is balanced by the tension of the flexible cable.

[0014] The upper chord rigid member is made of reinforced concrete or steel, and its structural form is a solid web beam or truss.

[0015] The flexible cable is a prestressed steel strand or a steel tie rod;

[0016] The flexible cable is a prestressed structure, and prestress is applied by tensioning at both ends, or by applying prestress through support rods and hinged supports.

[0017] The arch ring and arch foot connector are both prefabricated from steel sections, and the arch ring and arch foot connector are connected by bolts.

[0018] The height of the assembled arch ring and arch foot connector shall not exceed the length of the adjacent support rod, and the span of the assembled arch ring and arch foot connector shall be consistent with the net distance between the adjacent support rods.

[0019] The arch top is attached to the lower edge end face of the upper chord rigid member and fixed with bolts;

[0020] The lower end face of the arch foot connector is attached to the inner end face of the adjacent strut and fixed with bolts.

[0021] The strut is prefabricated from steel profiles and is connected to the upper chord rigid member and hinge support by bolts.

[0022] The struts are multiple and symmetrically arranged at the lower end of the upper chord rigid member, with the length of the struts decreasing from the middle to both sides.

[0023] The hinge support has an arc-shaped groove with a cross-sectional dimension larger than that of the flexible cable. The flexible cable slides freely within the hinge support along the tensioning direction, while its movement in other directions is constrained by the hinge support.

[0024] The anti-slip connector is a steel component, with one end attached to the upper chord rigid component and the other end attached to the strut;

[0025] The anti-slip connector is fixed to the upper chord rigid member and the strut by bolts;

[0026] The anti-slip connector is only located on the side of the strut where there is no arch ring or arch foot connector.

[0027] The locking device is equipped with an anchor, and the flexible cable passes through the locking device and is locked by the anchor after tensioning.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] (1) The upper chord rigid member and the arch ring form a space truss, which strengthens the stiffness and stability of the tensioned beam structure and reduces the risk of out-of-plane instability of the tensioned beam;

[0030] (2) By using multiple arch rings to form a continuous arch, the transmission of horizontal component force in the arch beam structure is solved, the span of the arch beam is effectively reduced, and the safety redundancy of the structure is improved.

[0031] (3) The flexible cables of the tensioned beam structure adopt a prestressed structure to provide vertical support reaction force for the arch structure, replacing the corresponding steel structure support components and reducing the project cost;

[0032] (4) Arched beam structures can improve the stiffness of local areas of large-span beams, reduce the number and length of struts, and make large-span beam structures have smaller beam height and height-to-span ratio, providing more usable space for the project;

[0033] (5) The large-span beam structure combining arch beams and tensioned beams can be used for temporary structures. After the structure's service life ends, it can be recycled and reused to achieve energy conservation, emission reduction, and green construction. Attached Figure Description

[0034] The accompanying drawings are provided to further explain the invention and form part of the invention. In the drawings:

[0035] Figure 1 This is a schematic diagram of a large-span beam structure combining an arched beam and a tensioned beam, as described in this invention.

[0036] The code descriptions in the diagram are as follows: 1-Upper chord rigid member; 2-Flexible cable; 3-Arch ring; 4-Arch foot connector; 5-Strut; 6-Hinge support; 7-Anti-slip connector; 8-Locking device. Detailed Implementation

[0037] To make the technical problems, solutions, and beneficial effects of this invention clearer and more understandable, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0038] like Figure 1 As shown, a large-span beam structure combining an arched beam and a tensioned beam mainly includes: a rigid upper chord member 1, a flexible cable 2, an arch ring 3, an arch foot connector 4, a strut 5, a hinged support 6, an anti-slip connector 7, and a locking device 8. The large-span beam structure consists of an arched beam structure and a tensioned beam structure.

[0039] The upper chord rigid member 1, the flexible cable 2, and the strut 5 constitute a conventional tensioned beam structure. One end of the strut 5 is fixed to the upper chord rigid member 1, and the other end is connected to the hinge support 6. The flexible cable 2 passes through the hinge support 6, and its two ends are locked by a locking device 8 connected to the upper chord rigid member 1. The flexible cable 2 is a prestressed structure, and prestress is applied by tensioning both ends, or by supporting the strut 5 and the hinge support 6.

[0040] Arch rings 3 are arranged between two adjacent struts 5 and are assembled with struts 5 through arch foot connectors 4 to form an arched beam structure. Multiple arch rings 3 are connected to struts 5 via arch foot connectors 4, forming a continuous arch. When the upper chord rigid member 1 is subjected to external force, it transmits the force to the arch rings 3. The horizontal component of the force at the non-free end of the arch ring 3 is balanced by the adjacent arch rings 3, while the horizontal component at the free end of the arch ring 3 is balanced by the anti-slip connectors 7 connected to the struts 5. The vertical component of the force in the arch ring 3 is transmitted to the flexible cable 2 through the struts 5 and hinged supports 6, and is balanced by the tension of the flexible cable 2.

[0041] The above provides a detailed description of the solutions provided by the embodiments of the present invention. For those skilled in the art, based on the ideas of the embodiments of the present invention, there will be changes in the specific implementation methods and application scope. The scope of protection of the present invention is not limited to the technical solutions mentioned in this embodiment; any technical solution inspired by the present invention falls within the protection scope of the present invention.

Claims

1. A large-span beam structure combining arched beams and tensioned beams, characterized in that: The components that make up a long-span beam structure include: rigid upper chord members, flexible cables, arch rings, arch foot connectors, struts, hinged supports, anti-slip connectors, and locking devices; The large-span beam structure consists of an arched beam structure and a tensioned beam structure; One end of the strut is fixed to the upper chord rigid member, and the other end is connected to the hinge support; The flexible cable passes through the hinge support, and its two ends are locked by a locking device connected to the upper chord rigid member to form a tensioned beam structure; The arch rings are connected to the struts via arch foot connectors, and multiple arch rings form a continuous arch, which together with the upper chord rigid members form an arch beam structure. The horizontal component of the force at the non-free end of the arch ring is balanced by the adjacent arch rings, and the horizontal component of the force at the free end of the arch ring is balanced by the anti-slip connector connected to the strut. The vertical component of the arch is transmitted to the flexible cable through the struts and hinges, and is balanced by the tension of the flexible cable.

2. The large-span beam structure combining arched beams and tensioned beams as described in claim 1, characterized in that: The upper chord rigid member is made of reinforced concrete or steel, and its structural form is a solid web beam or truss.

3. A large-span beam structure combining an arched beam and a tensioned beam as described in claim 1, characterized in that: The flexible cable is a prestressed steel strand or a steel tie rod; The flexible cable is a prestressed structure, and prestress is applied by tensioning at both ends, or by applying prestress through support rods and hinged supports.

4. A large-span beam structure combining an arched beam and a tensioned beam as described in claim 1, characterized in that: The arch ring and arch foot connector are both prefabricated from steel sections, and the arch ring and arch foot connector are connected by bolts. The height of the assembled arch ring and arch foot connector shall not exceed the length of the adjacent support rod, and the span of the assembled arch ring and arch foot connector shall be consistent with the net distance between the adjacent support rods. The arch top is attached to the lower edge end face of the upper chord rigid member and fixed with bolts; The lower end face of the arch foot connector is attached to the inner end face of the adjacent strut and fixed with bolts.

5. A large-span beam structure combining an arched beam and a tensioned beam as described in claim 1, characterized in that: The strut is prefabricated from steel profiles and is connected to the upper chord rigid member and hinge support by bolts. The struts are multiple and symmetrically arranged at the lower end of the upper chord rigid member, with the length of the struts decreasing from the middle to both sides.

6. A large-span beam structure combining an arched beam and a tensioned beam as described in claim 1, characterized in that: The hinge support has an arc-shaped groove with a cross-sectional dimension larger than that of the flexible cable. The flexible cable slides freely within the hinge support along the tensioning direction, while its movement in other directions is constrained by the hinge support.

7. A large-span beam structure combining an arched beam and a tensioned beam as described in claim 1, characterized in that: The anti-slip connector is a steel component, with one end attached to the upper chord rigid component and the other end attached to the strut; The anti-slip connector is fixed to the upper chord rigid member and the strut by bolts; The anti-slip connector is only located on the side of the strut where there is no arch ring or arch foot connector.

8. A large-span beam structure combining an arched beam and a tensioned beam as described in claim 1, characterized in that: The locking device is equipped with an anchor, and the flexible cable passes through the locking device and is locked by the anchor after tensioning.

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