Y-shaped beam string structure

Abstract

The utility model discloses a Y-shaped beam string structure, and belongs to the field of building structures. The structure comprises a Y-shaped upper chord beam structure, a lower chord cable, a supporting rod and an anchoring part, the Y-shaped upper chord beam structure comprises three upper chord beams of the same structure, one end of each upper chord beam is converged at a center point, and the other end of each upper chord beam radially extends outwards from the center point; the elevation of the central point is higher than that of the other end of the upper chord beam; a lower chord cable is arranged below each upper chord beam through a supporting rod, and when the supporting rods are not stressed, the lower chord cables are in a loose state. The lower string cable is fixedly connected with the outer end of each upper string beam through an anchoring part. The planar beam string structure is attractive in structural form and suitable for buildings with triangular planes, the problems that a traditional planar beam string structure is inconsistent in clearance, unreasonable in height and unattractive are effectively solved, and material waste is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of building structure, specifically relating to a Y-shaped tensioned beam structure. Background Technology

[0002] Tensioned beam structures evolved from ordinary beams, allowing for larger spans. Existing tensioned beam structural systems are based on the stress characteristics of simply supported beams, consisting of a rigid upper chord member, flexible lower chord cables, and connecting struts, forming a planar load-bearing system. This structure is not only simple in construction but also clearly transmits force. From an architectural design perspective, tensioned beam structures are lightweight and expressive, making them a popular choice for architects in large-span structural systems. Tensioned beam structures have the ability to span large spaces, and this structural form has been widely adopted in numerous projects in my country, such as the Shanghai Pudong International Airport terminal, the Guangzhou International Convention and Exhibition Center, and the Heilongjiang International Convention, Exhibition and Sports Center, demonstrating its broad application.

[0003] However, existing tensioned beam structures and their practical engineering applications present several problems: 1) Tensioned beam structures are typically suitable for rectangular planes and are generally planar tensioned beams. Even so-called spatial tensioned beams are mostly just replacing the top chord beam in a tensioned beam with a spatial beam, such as using a spatial truss as the top chord beam in a tensioned beam. For buildings with triangular plan shapes, conventional tensioned beam structures cannot fully utilize their advantages. 2) As the span of the tensioned beam structure increases, the planar tensioned beam itself may have out-of-plane stability issues, requiring necessary measures to prevent its out-of-plane instability. 3) When using planar tensioned beam structures in a triangular plane, due to the different spans within the plane, using the same tensioned beam height will result in material waste and affect the building's aesthetics; using different tensioned beam heights will lead to inconsistent building clearances.

[0004] Therefore, there is an urgent need to provide a tensioned beam structure that is suitable for triangular planes, while reducing structural span, saving materials, and improving architectural aesthetics. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of the existing technology and provide a Y-shaped tensioned beam structure.

[0006] The specific technical solution adopted in this utility model is as follows:

[0007] This utility model provides a Y-shaped tensioned beam structure, including a Y-shaped upper chord beam structure, a lower chord, a support rod and anchors, wherein the Y-shaped upper chord beam structure includes a first upper chord beam, a second upper chord beam and a third upper chord beam;

[0008] One end of the first, second, and third upper chord beams converges at a central point, and the other end radiates outward from the central point; the elevation of the central point is higher than the elevation of the other end of the first, second, and third upper chord beams; a lower chord is installed below the first, second, and third upper chord beams via a support rod, and the lower chord is in a slack state when the support rod is not under force; the lower chord is fixedly connected to the outer ends of the first, second, and third upper chord beams via anchors.

[0009] Preferably, the lower chord is a prestressed cable, which is a prestressed steel wire cable or a prestressed steel strand.

[0010] Preferably, the support rod is a compression member.

[0011] Preferably, in the Y-shaped upper chord beam structure, several support rods are vertically arranged between each upper chord beam and the lower chord, and the upper end of the support rods is connected to each upper chord beam by a hinge.

[0012] Preferably, the lower end of the support rod is connected to the lower chord via a clamp.

[0013] Preferably, the anchor is an anchor.

[0014] Preferably, the first, second, and third upper chord beams in the Y-shaped upper chord beam structure are rigid lattice members or solid web members.

[0015] Preferably, a peripheral ring beam is provided between adjacent upper chord beams in the Y-shaped upper chord beam structure.

[0016] Furthermore, purlins are installed between the peripheral ring beam and the first, second, and third upper chord beams to form a roof system.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] (1) The Y-shaped tensioned beam structure provided by this utility model is aesthetically pleasing and suitable for buildings with a triangular plan. It effectively solves the problems of inconsistent headroom, unreasonable height and unsightly appearance when traditional planar tensioned beams are applied to triangular planar roofs, thus avoiding material waste.

[0019] (2) The Y-shaped tensioned beam structure provided by this utility model has excellent stress performance. Through innovative design, the Y-shaped tensioned beam is formed, which effectively reduces the span of the tensioned beam and makes the structure more economical and reasonable.

[0020] (3) The Y-shaped tensioned beam structure provided by this utility model adopts high-strength cables with excellent tensile performance and high-strength compression members with excellent compressive performance, giving full play to the tensile and compressive characteristics of these two materials and improving the overall structural performance.

[0021] (4) The Y-shaped tensioned beam structure provided by this utility model can be used in conjunction with the surrounding ring beam for purlin erection, which effectively solves the problem of roof beam setting and provides convenience for roof construction. Attached Figure Description

[0022] Figure 1 This is a perspective view of the Y-shaped tensioned beam structure provided in this embodiment;

[0023] Figure 2 This is a top view of the Y-shaped tensioned beam structure provided in this embodiment;

[0024] Figure 3 This is a top view of the Y-shaped tensioned beam structure, purlins, and peripheral ring beams in this embodiment;

[0025] Figure 4 This is a three-dimensional view of the Y-shaped tensioned beam structure, purlins, and surrounding ring beams in this embodiment;

[0026] Figure 5 This is a schematic diagram of the anchorage connection between the lower chord and the upper chord beam in this embodiment;

[0027] In the diagram: Y-shaped upper chord structure 1, first upper chord beam 101, second upper chord beam 102, third upper chord beam 103, lower chord 2, support rod 3, anchor 4, peripheral ring beam 5, purlin 6. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. Technical features in various embodiments of this utility model can be combined appropriately without conflict.

[0029] In the description of this utility model, it should be understood that the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include at least one of those features.

[0030] like Figure 1As shown, in a preferred embodiment of this utility model, a Y-shaped tensioned beam structure is provided, including a Y-shaped upper chord beam structure 1, a lower chord cable 2, a support rod 3, and anchors 4. The Y-shaped upper chord beam structure 1 includes a first upper chord beam 101, a second upper chord beam 102, and a third upper chord beam 103, all with identical structures. The first upper chord beam 101, the second upper chord beam 102, and the third upper chord beam 103 are rigid lattice-type members or solid-web members. A lattice-type member refers to a member composed of several members arranged according to certain rules, which typically form a lattice-like structure on the cross-section of the member. This structural form can effectively utilize materials, improve the load-bearing capacity and stability of the member, and reduce the self-weight of the structure. A solid-web member refers to a member with a solid or nearly solid cross-section. Due to the solid cross-section, the weight per unit length is larger under the same cross-sectional characteristics, making it suitable for structures with smaller spans. Those skilled in the art can choose according to the actual building conditions.

[0031] like Figure 2 As shown, one end of the first upper chord beam 101, the second upper chord beam 102, and the third upper chord beam 103 converges at a central point, and the other ends radiate outward from the central point, forming a three-pronged structure. The elevation of this central point is higher than the elevation of the other ends of the first upper chord beam 101, the second upper chord beam 102, and the third upper chord beam 103. The projection shape of the first upper chord beam 101, the second upper chord beam 102, and the third upper chord beam 103 perpendicular to the ground in the Y-shaped upper chord beam structure 1 is also similar to a Y shape.

[0032] In the structure provided by this utility model, lower chord cables 2 are provided below the first upper chord beam 101, the second upper chord beam 102, and the third upper chord beam 103 via support rods 3. In the Y-shaped upper chord beam structure 1, several support rods 3 are vertically arranged between each upper chord beam and the lower chord cable 2. The upper end of the support rod 3 is hinged to each upper chord beam using a pin, and the lower end of the support rod 3 is connected to the lower chord cable 2 via a clamp. The outer ends of the lower chord cable 2 and the first upper chord beam 101, the second upper chord beam 102, and the third upper chord beam 103 are fixedly connected by anchors 4. In a specific embodiment, the anchors 4 can be anchorages. Specifically, as shown... Figure 5 As shown, the outer ends of the lower chord 2 are fixedly connected to the outer ends of the first upper chord beam 101, the second upper chord beam 102, and the third upper chord beam 103 respectively through anchors.

[0033] In this specific embodiment, the support rod 3 is a compression member. The first upper chord beam 101, the second upper chord beam 102, and the third upper chord beam 103 can be made of steel. The lower chord cable 2 is a prestressed cable, which can be a prestressed steel wire cable or a prestressed steel strand.

[0034] It should be noted that, depending on the material of the lower chord 2, those skilled in the art can use cast anchors or wedge anchors to fix the outer end of the lower chord 2 to the outer ends of the first upper chord beam 101, the second upper chord beam 102, and the third upper chord beam 103 in the Y-shaped upper chord beam structure 1.

[0035] In actual building construction design, a ring beam 5 is installed around adjacent upper chord beams in the Y-shaped tensioned beam structure 1. Purlins 6 are installed between the ring beams 5 and the first upper chord beam 101, second upper chord beam 102, and third upper chord beam 103 to form a roof system, as detailed below. Figure 3 and Figure 4 As shown. The top chord beam in the Y-shaped beam structure 1 can be a single member or a combination of members, depending on the span. Since the elevation of the center point where the first top chord beam 101, the second top chord beam 102, and the third top chord beam 103 converge in the Y-shaped beam structure 1 is higher than the three outer points, the Y-shaped beam structure 1 has the characteristic of being high in the middle and low in the middle, forming natural drainage.

[0036] The height of the Y-shaped tensioned beam structure provided by this utility model should preferably be between 1 / 10 and 1 / 12 of the span. The cross-sectional shape and dimensions of the first upper chord beam 101, the second upper chord beam 102, the third upper chord beam 103, the support rod 3, and the lower chord 2 should be specifically calculated and determined according to the structural dimensions and the magnitude of the external load. For the tensioning of the lower chord, it is advisable to use three jacks for simultaneous tensioning. This simultaneous tensioning method is to ensure that the lower chord is subjected to uniform force during tensioning and to avoid changes in structural stress caused by uneven tensioning.

[0037] Example 1

[0038] This embodiment provides a Y-shaped tensioned beam structure as described above, wherein the plane formed by the vertical projection of the Y-shaped tensioned beam structure is an equilateral triangle with a side length of 40m. The tensioned beam has a rise of 3.5m. The upper chord and support rod are made of Q355 steel pipe with dimensions of Φ377×14 and Φ180×6 respectively, and the lower chord is made of high-strength steel wire with a cross-sectional area of ​​6358.5mm². 2 The initial prestress is 5000kN, and the uniformly distributed load on the roof is 1.0kN / m. 2 The calculated maximum displacement of the structure is 11.0 mm, the maximum stress in the upper chord is 284 MPa, the maximum stress in the support rod is 79 MPa, the maximum stress in the lower chord is 789 MPa, and the total steel consumption is 12.56 tons, which is 18 kg / m². 2 This structure not only meets architectural requirements but also offers good economic benefits.

[0039] The embodiments described above are merely preferred solutions of this utility model, and are not intended to limit the scope of this utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this utility model. Therefore, all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A Y-shaped beam string structure, characterized by, The Y-shaped upper chord beam structure (1) comprises a first upper chord beam (101), a second upper chord beam (102) and a third upper chord beam (103); One end of the first upper chord beam (101), the second upper chord beam (102) and the third upper chord beam (103) converges at a center point, and the other end extends outward from the center point; the elevation of the center point is higher than the elevation of the other end of the first upper chord beam (101), the second upper chord beam (102) and the third upper chord beam (103); the lower part of the first upper chord beam (101), the second upper chord beam (102) and the third upper chord beam (103) is provided with a lower chord cable (2) through a support rod (3), and the lower chord cable (2) is in a relaxed state when the support rod (3) is not stressed; the lower chord cable (2) and the outer end of the first upper chord beam (101), the second upper chord beam (102) and the third upper chord beam (103) are fixedly connected through an anchor (4).

2. The Y-shaped beam string structure according to claim 1, characterized in that, The lower chord cable (2) is a prestressed cable, which adopts a prestressed steel wire cable or a prestressed steel strand.

3. The Y-shaped beam string structure according to claim 1, characterized by The support rod (3) is a compression member.

4. The Y-shaped beam string structure according to claim 1, characterized by A plurality of support rods (3) are vertically arranged between each upper chord beam and the lower chord cable (2) in the Y-shaped upper chord beam structure (1), and the upper end of the support rod (3) is connected to each upper chord beam through a hinge.

5. The Y-shaped beam string structure according to claim 1, characterized by The lower end of the support rod (3) is connected to the lower chord cable (2) through a clamp.

6. The Y-shaped beam string structure according to claim 1, characterized by The anchor (4) adopts an anchor.

7. The Y-shaped beam string structure according to claim 1, characterized by The first upper chord beam (101), the second upper chord beam (102) and the third upper chord beam (103) in the Y-shaped upper chord beam structure (1) are rigid lattice members or solid-web members.

8. The Y-shaped beam string structure according to claim 1, characterized by A perimeter ring beam (5) is arranged between adjacent upper chord beams in the Y-shaped upper chord beam structure (1).

9. The Y-shaped beam string structure according to claim 8, characterized in that, A purlin (6) is arranged between the perimeter ring beam (5) and the first upper chord beam (101), the second upper chord beam (102) and the third upper chord beam (103) to form a roof system.

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