A long-span chord structure

Abstract

The present invention discloses a large-span chord-supported structure, comprising an upper single-layer lattice shell and a lower cable-strut system, wherein the upper single-layer lattice shell is formed by staggered connection of multiple X-direction arches and multiple Y-direction arches, and supports are provided at both ends of the X-direction arches and the Y-direction arches, and the lower cable-strut system comprises an outer ring chord support, wherein the outer ring chord support comprises an outer annular cable, an outer vertical strut and an outer radial cable, wherein the upper end of the outer vertical strut is connected to the upper single-layer lattice shell, and the lower end is connected to the outer annular cable and the outer radial cable, wherein one end of the outer radial cable is connected to the lower end of the outer vertical strut, and the other end is connected to the support of the upper single-layer lattice shell. The large-span chord-supported structure of the present invention arranges the lower cable-strut system under several arches with small span-to-span ratios around the upper single-layer lattice shell, thereby improving the stiffness of the side beams of the upper single-layer lattice shell, improving the shortcoming of uneven overall stiffness distribution caused by too small span-to-span ratios of the side beams of the traditional bidirectional string beam, and giving full play to the role of the lower cable-strut system.

Description

Technical Field

[0001] The invention relates to the technical field of building structures, and in particular to a large-span chord-supported structure. Background Art

[0002] The beam string structure is a rigid-flexible hybrid structure consisting of a rigid compression-bending member upper chord arch, flexible cables or steel rods, and vertical struts connecting the two. It is a common self-balancing structural system in roof structures. The bidirectional beam string is composed of several beam strings arranged in a vertical and horizontal cross-arrangement. Compared with the unidirectional beam string, the bidirectional beam string has improved the out-of-plane stability of the arch due to the cross connection of the upper chord arch, showing good spatial force characteristics. However, the span ratio of each beam around the bidirectional beam string is too small, which makes the overall stiffness distribution of the structure uneven, and the role of the lower cable-strut system cannot be fully and reasonably exerted. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a large-span chord-supported structure, which solves the problem of uneven overall stiffness distribution of traditional bidirectional tensioned beams due to the small span-to-span ratio of the side beams.

[0004] The technical solution of the present invention is: a large-span chord-supported structure, including an upper single-layer lattice shell and a lower cable-bar system, wherein the upper single-layer lattice shell is formed by staggered connection of multiple X-direction arches and multiple Y-direction arches, and supports are provided at both ends of the X-direction arches and the Y-direction arches, and the lower cable-bar system includes an outer ring chord support, and the outer ring chord support includes an outer annular cable, an outer vertical strut and an outer radial cable, the upper end of the outer vertical strut is connected to the upper single-layer lattice shell, and the lower end is connected to the outer annular cable and the outer radial cable, one end of the outer radial cable is connected to the lower end of the outer vertical strut, and the other end is connected to the support of the upper single-layer lattice shell. The node connection structure of the lower cable-bar system of the present invention is simpler, the number is smaller, and the construction is more convenient.

[0005] Furthermore, the connection node between the X-direction arch and the Y-direction arch is rigidly connected.

[0006] Furthermore, one end of the X-direction arch and the Y-direction arch is provided with a fixed hinge support, and the other end is provided with a horizontal sliding hinge support.

[0007] Furthermore, the X-direction arch and the Y-direction arch are both made of I-shaped steel.

[0008] Furthermore, the outer radial cables include X-radial cables and Y-radial cables, one end of the X-radial cables and the Y-radial cables are connected to the lower end of the outer vertical support rod, and the other end is respectively connected to the support of the X-direction arch and the support of the Y-direction arch.

[0009] Furthermore, the lower cable-rod system also includes at least one inner ring chord support, which includes inner annular cables, inner vertical struts and inner radial cables. The upper ends of the inner vertical struts are connected to the upper single-layer lattice shell, and the lower ends are connected to the inner annular cables and the inner radial cables. One end of the inner radial cable is connected to the lower end of the inner vertical struts, and the other end is connected to the upper end of the outer vertical struts adjacent to the outer ring.

[0010] Furthermore, the outer annular cable and the inner annular cable are both square, the lower ends of the four outer vertical struts are respectively hinged to the four corners of the outer annular cable, and the lower ends of the four inner vertical struts are respectively hinged to the four corners of the inner annular cable. Each circle of chord support only needs four vertical struts, the number of vertical struts is reduced, the aesthetics is outstanding, and the number of nodes is reduced, making the construction more convenient.

[0011] Furthermore, the outer vertical support rods and the inner vertical support rods are both made of square steel pipes or round steel pipes.

[0012] Furthermore, the inner annular cable, the outer annular cable, the outer radial cable and the inner radial cable are all made of steel wire bundles or steel strands.

[0013] Furthermore, the outer vertical struts and the inner vertical struts have the same length, the two ends of the outer vertical struts are respectively hinged to the upper single-layer lattice shell and the outer radial cable, and the two ends of the inner vertical struts are respectively hinged to the upper single-layer lattice shell and the inner radial cable.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The large-span chord-supported structure of the present invention arranges the lower cable-strut system under several arches with small span-to-span ratios around the upper single-layer lattice shell, thereby improving the stiffness of the side beams of the upper single-layer lattice shell, improving the shortcoming of uneven overall stiffness distribution caused by the small span-to-span ratio of the side beams of the traditional bidirectional tensioned beam, giving full play to the role of the lower cable-strut system, and at the same time making the force transmission path of the overall structure clearer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the large-span chord-supported structure of the present invention.

[0017] Figure 2 It is a schematic structural diagram of the upper single-layer lattice shell of the present invention.

[0018] Figure 3 Schematic diagram of the structure of the large-span chord-supported structure according to Example 2 of the present invention.

[0019] Figure 4 Schematic diagram of the structure of the lower cable rod system of Example 2 of the present invention.

[0020] Figure 5 It is a top view of the large-span chord-supported structure of Example 2 of the present invention.

[0021] Figure 6 It is the horizontal projection of the large-span chord-supported structure of Example 2 of the present invention.

[0022] X-direction arch 1, Y-direction arch 2, outer annular cable 3, outer vertical strut 4, X-radial cable 51, Y-radial cable 52, inner annular cable 6, inner vertical strut 7, inner radial cable 8. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0024] Example 1

[0025] like Figure 1 and Figure 2 As shown, this embodiment provides a large-span chord-supported structure, including an upper single-layer lattice shell and a lower cable-strut system.

[0026] like Figure 1 and Figure 2 As shown, the upper single-layer lattice shell is formed by staggered connection of multiple X-direction arches 1 and multiple Y-direction arches 2, wherein the X-direction arch is continuous and the Y-direction arch is interrupted, supports are provided at both ends of the X-direction arch and the Y-direction arch, and the connection node between the X-direction arch and the Y-direction arch is rigidly connected. In this embodiment, one end of the X-direction arch and the Y-direction arch is provided with a fixed hinge support, and the other end is provided with a horizontal sliding hinge support, and the X-direction arch and the Y-direction arch are both made of I-shaped steel.

[0027] like Figure 1 and Figure 2 As shown, the lower cable-bar system includes an outer ring chord support, and the outer ring chord support includes an outer annular cable 3, an outer vertical strut 4 and an outer radial cable. The upper end of the outer vertical strut is connected to the upper single-layer lattice shell, and the lower end is connected to the outer annular cable and the outer radial cable. One end of the outer radial cable is connected to the lower end of the outer vertical strut, and the other end is connected to the support of the upper single-layer lattice shell. In this embodiment, the outer radial cable includes an X-radial cable 51 and a Y-radial cable 52. One end of the X-radial cable and the Y-radial cable are both connected to the lower end of the outer vertical strut, and the other end is respectively connected to the support of the X-direction arch and the support of the Y-direction arch. The outer annular cable is square, and the lower ends of the four outer vertical struts are respectively hinged to the four corners of the outer annular cable. The outer vertical strut adopts square steel pipes or round steel pipes, and the outer annular cable and the outer radial cable adopt steel wire bundles or steel strands. One end of the outer vertical strut is hinged to the connection node between the X-direction arch and the Y-direction arch, and the other end is hinged to the outer radial cable.

[0028] Example 2

[0029] like Figure 3 , Figure 4 and Figure 5As shown, the difference between this embodiment and embodiment 1 is that the lower cable rod system also includes at least one inner circle chord. In this embodiment, the inner circle chord is one circle. In other embodiments, the inner circle chord can be two circles, three circles or even more circles arranged from the outside to the inside, which are not listed one by one here; the inner circle chord includes an inner annular cable 6, an inner vertical strut 7 and an inner radial cable 8, the upper end of the inner vertical strut is connected to the upper single-layer lattice shell, and the lower end is connected to the inner annular cable and the inner radial cable, one end of the inner radial cable is connected to the lower end of the inner vertical strut, and the other end is connected to the upper end of the outer vertical strut adjacent to the outer circle, the inner annular cable is square, and the lower ends of the four inner vertical struts are respectively hinged to the four corners of the inner annular cable.

[0030] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the inner vertical strut is made of square steel tube or round steel tube, the inner annular cable and the inner radial cable are made of steel wire bundle or steel strand, the outer vertical strut and the inner vertical strut are of the same length, one end of the inner vertical strut is hinged to the connection node of the X-direction arch and the Y-direction arch, and the other end is hinged to the inner radial cable.

[0031] As described above, the present invention can be better implemented. The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention; that is, all equivalent changes and modifications made according to the content of the present invention are covered by the scope of protection required by the claims of the present invention.

Claims

1. A long-span chord structure, characterized in that: It comprises an upper single-layer lattice shell and a lower cable-rod system, wherein the upper single-layer lattice shell is formed by staggered connection of multiple X-direction arches and multiple Y-direction arches, and supports are provided at both ends of the X-direction arches and the Y-direction arches, and the lower cable-rod system comprises an outer ring chord support, and the outer ring chord support comprises an outer ring cable, an outer vertical strut and an outer radial cable, the upper end of the outer vertical strut is connected to the upper single-layer lattice shell, and the lower end is connected to the outer ring cable and the outer radial cable, one end of the outer radial cable is connected to the lower end of the outer vertical strut, and the other end is connected to the support of the upper single-layer lattice shell; The rise-span ratio of the multiple X-direction arches and multiple Y-direction arches in the middle of the upper single-layer lattice shell is greater than the rise-span ratio of the multiple X-direction arches and multiple Y-direction arches in the periphery, and the lower cable rod system is arranged under the multiple X-direction arches and Y-direction arches with small rise-span ratios in the periphery of the upper single-layer lattice shell.

2. The long-span chord-supported structure according to claim 1, characterized in that: The connection node between the X-direction arch and the Y-direction arch is rigidly connected.

3. The long-span chord-supported structure according to claim 1, characterized in that: One end of the X-direction arch and the Y-direction arch is provided with a fixed hinge support, and the other end is provided with a horizontal sliding hinge support.

4. The long-span chord-supported structure according to claim 1, characterized in that: The X-direction arch and the Y-direction arch are both made of I-shaped steel.

5. The long-span chord-supported structure according to claim 1, characterized in that: The outer radial cables include X radial cables and Y radial cables, one end of the X radial cables and the Y radial cables are connected to the lower end of the outer vertical support rod, and the other end is respectively connected to the support of the X-direction arch and the support of the Y-direction arch.

6. The long-span chord-supported structure according to claim 5, characterized in that: The lower cable-rod system also includes at least one inner ring chord support, which includes inner annular cables, inner vertical struts and inner radial cables. The upper ends of the inner vertical struts are connected to the upper single-layer lattice shell, and the lower ends are connected to the inner annular cables and the inner radial cables. One end of the inner radial cable is connected to the lower end of the inner vertical struts, and the other end is connected to the upper end of the outer vertical struts adjacent to the outer ring.

7. The long-span chord-supported structure according to claim 6, characterized in that: The outer annular cable and the inner annular cable are both square, the lower ends of the four outer vertical struts are respectively hinged to the four corners of the outer annular cable, and the lower ends of the four inner vertical struts are respectively hinged to the four corners of the inner annular cable.

8. The long-span chord-supported structure according to claim 6, characterized in that: The outer vertical bracing rods and the inner vertical bracing rods are both made of square steel pipes or round steel pipes.

9. The long-span chord-supported structure according to claim 6, characterized in that: The inner annular cable, the outer annular cable, the outer radial cable and the inner radial cable are all made of steel wire bundles or steel strands.

10. The long-span chord-supported structure according to claim 6, characterized in that: The outer vertical struts and the inner vertical struts have the same length, the two ends of the outer vertical struts are respectively hinged to the upper single-layer lattice shell and the outer radial cable, and the two ends of the inner vertical struts are respectively hinged to the upper single-layer lattice shell and the inner radial cable.

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