A wind-resistant beam string structure and construction method

Abstract

The application relates to a strong-wind-resistant beam string structure and a construction method, and belongs to the technical field of building engineering. The beam string structure comprises an upper chord beam, a cable, a support rod and a support column. The two ends of the cable are hingedly connected to the two ends of the upper chord beam. The two ends of the upper chord beam are connected to the top of the support column through a first connecting support and a second connecting support respectively. The first connecting support or the second connecting support is a one-way sliding support in the tensioning construction stage and is converted into a fixed support after the construction is completed. The cable is arranged in sections. A plurality of first connecting pieces are arranged on the axis of the upper chord beam. The first connecting piece at the position where the curvature of the upper chord beam changes most and the first connecting piece at the adjacent position are directly hingedly connected to one end of two cable sections. The remaining cables are detachably connected through second connecting pieces. The two ends of the support rod are hingedly connected to the adjacent first connecting pieces and second connecting pieces respectively.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of building engineering, and in particular relates to a strong wind resistant beam string structure and a construction method. BACKGROUND

[0002] The beam string structure is a new type of large-span structure system developed rapidly in recent years due to its light weight, large span and large rigidity. The structure is mainly composed of an upper chord beam, a strut and a cable. The upper chord beam is a bending-resistant component with large rigidity, the cable is a flexible component with high strength, and the strut is mainly used to connect the upper chord beam and the cable. The beam string structure is mainly applied to large-span buildings such as stadiums, airport terminals, exhibition halls, train station waiting rooms and station canopy.

[0003] Wind resistance is an important factor that needs to be considered for the beam string structure. The existing wind resistance measures for the beam string structure mainly include the method of adding weight and the method of adding wind-resistant cables. The method of adding weight increases the self-weight of the roof by pouring concrete or other methods. The method of adding wind-resistant cables adds a steel cable on the top of the upper chord beam or inside the upper chord beam to exert a downward force on the beam string structure. However, both of these measures increase the downward load of the beam string structure, ensuring that the downward vertical load of the structure is always greater than the upward wind suction force. For large-span roof structures, increasing the vertical load will inevitably lead to greater load burden on the structure, and thus to the problem of increased material consumption. SUMMARY

[0004] In view of the above analysis, the embodiments of the present application aim to provide a strong wind resistant beam string structure and a construction method to solve the technical problems of large load burden and complex structure in the prior art.

[0005] The purpose of the present application is achieved as follows:

[0006] The first aspect of the present application provides a strong wind resistant beam string structure, comprising:

[0007] an upper chord beam, a cable, a support rod and a support column;

[0008] Both ends of the cable are hinged to both ends of the upper chord beam, and both ends of the upper chord beam are connected to the top of the support column through a first connecting support and a second connecting support, respectively. The first connecting support or the second connecting support is a one-way sliding support during the tensioning construction phase and is converted into a fixed support after construction is completed;

[0009] The cable is arranged in sections, a plurality of first connecting pieces are arranged on the axis of the upper chord beam, and the first connecting piece at the position with the largest curvature change of the upper chord beam and the first connecting piece at the adjacent position are directly hinged to one end of two sections of the cable, and the remaining cables are detachably connected through a second connecting piece;

[0010] Two ends of the support rod are respectively hinged with the adjacent first connecting piece and the second connecting piece.

[0011] Further, the second connecting piece is axisymmetric, comprising a first hinged plate and a second hinged plate, the first hinged plate is provided with a first pin hole for being hinged with the cable, and the second hinged plate is provided with a second pin hole for being hinged with the end of the support rod.

[0012] Further, the first hinged plate and the second hinged plate are integrally formed, the first hinged plate has two symmetric axes, the second hinged plate has one symmetric axis, one of the two symmetric axes of the first hinged plate and the symmetric axis of the second hinged plate coincide with the symmetric axis of the second connecting piece, and the other of the two symmetric axes of the first hinged plate is perpendicular to the symmetric axis of the second connecting piece.

[0013] Further, the end of the cable is connected with a cable head ear plate, the cable head ear plate is hinged with the first hinged plate through a pin shaft passing through the first pin hole.

[0014] Further, the first connecting piece comprises two third hinged plates arranged in axis symmetry, two hinged ear plates are arranged at two ends of the support rod in a spaced manner, and three hinged ear plates are arranged in a spaced manner on the second hinged plate and the third hinged plate, the hinged ear plates of the support rod are hinged with the hinged ear plates of the second hinged plate and the third hinged plate through pin shafts.

[0015] Further, a length adjusting mechanism is arranged on each of the cables for adjusting the cable force of each of the cables.

[0016] Further, a one-way sliding displacement box is arranged at the bottom of the first connecting support or the second connecting support, the one-way sliding displacement box comprises a bottom plate, a limiting steel plate and a hook.

[0017] Further, the hook is arranged 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.

[0018] Further, the support column has lateral stiffness for providing horizontal elastic support when the cable-strutted beam structure is subjected to wind suction force, so that the upper chord beam and the support column are cooperatively stressed.

[0019] The second aspect embodiment of the application provides a construction method of the cable-strutted beam structure resistant to strong wind, comprising the following steps:

[0020] The support structure is installed, the support columns on both sides are erected and fixed, the first connecting support and the second connecting support are respectively installed at the top of the support columns, one of which is a one-way sliding support; the two ends of the upper chord beam are respectively connected with the first connecting support and the second connecting support;

[0021] The first connecting piece at the maximum curvature change position of the upper chord beam and the first connecting piece at the adjacent position are hingedly connected with the two ends of the two segments of the cable; the remaining segments of the cable are sequentially and detachably connected through the second connecting piece, and the ends of the first and last segments of the cable are hingedly connected with the two ends of the upper chord beam, so as to form a complete cable system; the two ends of the support rod are hingedly connected with the adjacent first connecting piece and second connecting piece respectively.

[0022] The cable is tensioned, the tensioning force value of each segment of the cable is determined, and the tensioning is implemented in a segmented, staged and sequential manner; in the tensioning process, the self-adaptive deformation of the structure is realized by using the one-way sliding support, so that the pressure of the upper chord beam and the cable force are self-balanced.

[0023] After the tensioning is completed, the limiting steel plate in the sliding direction of the one-way sliding displacement box is removed, and the one-way sliding support is fixed by welding the support bottom plate and the displacement box bottom plate, so that the support is converted from the sliding state to the fixed state.

[0024] Compared with the prior art, the present application can achieve at least one of the following beneficial effects:

[0025] The cable-stayed beam structure provided by the present application can form a stable triangular grid system in the structure by segmenting the cable and connecting the staggered first connecting pieces and second connecting pieces through the support rod, which can enhance the rigidity of the structure under the action of uneven load conditions, thereby effectively reducing the dead weight and material consumption of the structure; the first connecting piece at the maximum curvature change position of the upper chord beam and the first connecting piece at the adjacent position are hingedly connected with the cable, which optimizes the force flow transmission path and significantly improves the stress efficiency of the structure; by optimizing the constraint mode of the support at different stages, the self-balancing of the cable tension of the cable-stayed beam and the pressure of the upper chord beam is realized by the sliding of one end of the support during the construction tensioning stage, the overlarge horizontal load on the top of the support column is avoided, and the initial internal force of the support column is reduced. After the tensioning is completed, the support is converted into a fixed support, the support column and the cable-stayed beam are in cooperative stress, the lateral stiffness of the support column is used to provide horizontal elastic support, so that the upper chord beam can still form a stable suspended structure system when bearing overlarge wind suction force. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments or the prior art of the present application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0027] Figure 1A planar structural schematic diagram of the wind-resistant beam string structure provided for Embodiment 1 of the present application;

[0028] Figure 2 A structural schematic diagram of the second connecting piece provided for Embodiment 1 of the present application;

[0029] Figure 3 A partial enlarged view of the beam string structure provided for Embodiment 1 of the present application;

[0030] Figure 4 A structural schematic diagram of the first connecting piece provided for Embodiment 1 of the present application;

[0031] Figure 5 A structural schematic diagram of the first connecting support or the second connecting support provided for Embodiment 1 of the present application;

[0032] Figure 6 A three-dimensional structural schematic diagram of the wind-resistant beam string structure provided for Embodiment 1 of the present application.

[0033] Reference signs:

[0034] 1-upper chord beam; 11-first connecting piece; 110-third hinged plate; 12-first connecting support; 13-second connecting support; 2-cable; 21-second connecting piece; 210-first hinged plate; 210a-first pin hole; 211-second hinged plate; 211a-second pin hole; 22-cable head ear plate; 3-supporting rod; 4-supporting column; 5-one-way sliding displacement box; 50-bottom plate; 51-limiting steel plate; 52-pull hook. DETAILED DESCRIPTION

[0035] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. It should be noted that the embodiments and the features in the embodiments in the present disclosure can be combined, separated, interchanged and / or rearranged without conflict, if possible. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0036] Embodiment 1

[0037] One specific embodiment of the present application, as shown in Figures 1-6 discloses a wind-resistant beam string structure, comprising:

[0038] an upper chord beam 1, a cable 2, a supporting rod 3 and a supporting column 4;

[0039] Two ends of the cable 2 are hinged to two ends of the upper chord beam 1, and the two ends of the upper chord beam 1 are connected to the top of the support column 4 through a first connecting support 12 and a second connecting support 13 respectively, and the first connecting support 12 or the second connecting support 13 is a one-way sliding support in the tensioning construction stage and is converted into a fixed support after the construction is completed;

[0040] The cable 2 is arranged in sections, and a plurality of first connecting pieces 11 are arranged on the axis of the upper chord beam 1, and the first connecting piece 11 at the position where the curvature of the upper chord beam 1 changes most and the first connecting piece 11 at the adjacent position are directly hinged to one end of two sections of the cable 2, and the remaining cables 2 are detachably connected through second connecting pieces 21.

[0041] The two ends of the support rod 3 are hinged to the adjacent first connecting piece 11 and the second connecting piece 21 respectively.

[0042] Specifically, the upper chord beam 1 is made of high-strength steel material and has large bending stiffness for bearing the roof load, the cable 2 is composed of a plurality of sections of high-strength steel cable and is connected through the second connecting piece 21 to realize sectional installation and independent adjustment of cable force, the support rod 3 is usually a steel pipe for transmitting load and keeping the structure stable, the first connecting piece 11 is fixed to a specific position on the lower surface of the upper chord beam 1 according to mechanical analysis, instead of being completely uniformly distributed, and the first connecting piece 11 at the position where the curvature of the upper chord beam changes most and the first connecting piece 11 at the adjacent position are directly hinged to the cable 2 to optimize the main stress transmission path; the second connecting piece 21 is located at the sectional connection of the cable 2, and the projection points of the first connecting piece 11 and the second connecting piece 21 are staggered and distributed, and together with the support rod 3 form a stable triangular grid system to effectively improve the overall stiffness and wind resistance stability of the structure.

[0043] Compared with the prior art, the cable-stayed beam structure provided by the embodiment can enhance the stiffness of the structure under the action of uneven load conditions, thereby effectively reducing the dead weight and material consumption of the structure, by arranging the cable in sections and connecting the staggered first connecting pieces and second connecting pieces through the support rod to form a stable triangular grid system in the structure; the force flow transmission path is optimized by hinging the first connecting piece at the position where the curvature of the upper chord beam changes most and the first connecting piece at the adjacent position to the cable, thereby significantly improving the stress efficiency of the structure; by optimizing the constraint mode of the support at different stages, the self-balancing of the cable-stayed beam cable tension and the upper chord beam pressure can be realized by the sliding of one end of the support in the construction tensioning stage, the horizontal load on the top of the support column is avoided, and the initial internal force of the support column is reduced. After the tensioning and forming, the support is converted into a fixed support, the support column and the cable-stayed beam are cooperatively stressed, the lateral stiffness of the support column is used to provide horizontal elastic support, so that the upper chord beam can still form a stable suspended structure system when bearing excessive wind suction force.

[0044] In the embodiment, the second connecting piece 21 is axisymmetric, comprising a first hinged plate 210 and a second hinged plate 211, the first hinged plate 210 is provided with a first pin hole 210a for being hinged with the inhaul cable 2, and the second hinged plate 211 is provided with a second pin hole 211a for being hinged with the end of the support rod 3.

[0045] Specifically, as shown in the figure, the second connecting piece 21 is axisymmetric as a whole, the first hinged plate 210 and the second hinged plate 211 are integrally formed by welding or casting, the first hinged plate 210 is provided with two first pin holes 210a for being hinged with the cable head lug plate 22 at the end of the inhaul cable 2; and the second hinged plate 211 is provided with one second pin hole 211a for being hinged with the lower end of the support rod 3. Figure 2

[0046] In the embodiment, the first hinged plate 210 and the second hinged plate 211 are integrally formed, the first hinged plate 210 has two axes of symmetry, the second hinged plate 211 has one axis of symmetry, one of the axes of symmetry of the first hinged plate 210 and the axis of symmetry of the second hinged plate 211 coincide with the axis of symmetry of the second connecting piece 21, and the other axis of symmetry of the first hinged plate 210 is perpendicular to the axis of symmetry of the second connecting piece 21.

[0047] Specifically, as shown in the figure, the first hinged plate 210 is in the shape of a rectangular plate, has two axes of symmetry perpendicular to each other, one of which coincides with the axis of symmetry of the second connecting piece 21, and the other is perpendicular to it; the second hinged plate 211 is in the shape of a trapezoidal plate, has one axis of symmetry, which coincides with the axis of symmetry of the second connecting piece 21, ensuring that the second connecting piece 21 is balanced when under stress and avoiding local stress concentration. Figure 2

[0048] In the embodiment, the end of the inhaul cable 2 is connected with a cable head lug plate 22, the cable head lug plate 22 is hinged with the first hinged plate 210 through a pin shaft passing through the first pin hole 210a.

[0049] In the embodiment, the first connecting piece 11 comprises two third hinged plates 110 arranged axisymmetrically, the support rod 3 is provided with two hinged lug plates at both ends, the second hinged plate 211 and the third hinged plate 110 are both provided with three hinged lug plates, and the hinged lug plates of the support rod 3 are hinged with the hinged lug plates of the second hinged plate 211 and the third hinged plate 110 through pin shafts.

[0050] Specifically, as shown in the figure, Figure 4 ​​As shown, the first connecting member 11 is fixed to the lower surface of the upper chord beam 1 and includes two parallel third hinge plates 110, which are provided with pin holes. The support column 4 is provided with double lug plates at both ends. The second hinge plate 211 and the third hinge plate 110 are both provided with three lug plates. During installation, the double lug plates of the support column 3 are inserted into the gap between the three lug plates of the second hinge plate 211 or the third hinge plate 110, and are connected by a pin shaft to form a stable clamping plate type hinge joint. Figure 3 and Figure 4 As shown, the connecting mode allows the support column 3 to rotate flexibly in the force plane, effectively adapts to the deformation of the structure during wind load and tensioning process, and has a certain bending stiffness outside the force plane to limit the swing of the support column out of the plane.

[0051] In this embodiment, the length adjusting mechanism is provided on each segment of the cable 2 to adjust the cable force of each segment of the cable 2.

[0052] For example, the length adjusting mechanism is an adjusting sleeve and a hydraulic tensioner, which are arranged 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, so as to accurately control the prestress of each segment of the cable 2, ensure uniform distribution of the overall cable force, and improve the stability of the structure.

[0053] In this embodiment, the first connecting support 1 or the second connecting support 13 is provided with a one-way sliding displacement box 5 at the bottom. The one-way sliding displacement box 5 includes a bottom plate 50, a limiting steel plate 51 and a draw hook 52.

[0054] In this embodiment, the draw hook 52 is arranged 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, which is used to provide horizontal elastic support for the cable beam structure when it is subjected to wind suction force, so that the upper chord beam 1 and the support column 4 cooperate to bear force.

[0055] 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 being hinged with the support column 4. One of them is a fixed support, and the other is a one-way sliding support. The one-way sliding support realizes the sliding function through a one-way sliding displacement box arranged at the bottom thereof. The two limiting steel plates of the displacement box in the axial direction of the upper chord beam 1 (i.e. the sliding direction) leave a gap between the limiting steel plates and the support, allowing limited sliding in this direction; a draw hook is arranged in the non-sliding direction to bear the uplift force caused by the wind load. The limiting steel plates in the sliding direction are temporarily fixed by bolts to limit the sliding range of the support during the construction tensioning process. After the completion of the tensioning of the cable and the installation of the roof panel in place, the limiting steel plates in the sliding direction are removed, and the bottom plate of the support and the bottom plate of the displacement box are welded to be integrated, so that the support is converted from the temporary sliding state to the fixed state, ensuring the final shaping of the structure.

[0056] Embodiment 2

[0057] The embodiment provides a construction method of a strong-wind-resistant beam string structure, comprising the following steps:

[0058] The support structure is installed, the support columns on both sides are erected and fixed, the first connecting support and the second connecting support are respectively installed at the top of the support columns, one of which is a one-way sliding support; the two ends of the upper chord beam are connected with the first connecting support and the second connecting support respectively;

[0059] The cables and the support rods are installed in sections, one end of the two sections of the cable corresponding to the first connecting piece at the position where the curvature of the upper chord beam changes most and the first connecting piece at the adjacent position is directly hinged with the one end; the remaining sections of the cable are connected in sequence through the second connecting piece, and the ends of the first and last sections of the cable are hinged with the two ends of the upper chord beam to form a complete cable system; the two ends of the support rod are hinged with the adjacent first connecting piece and second connecting piece respectively;

[0060] The cable is tensioned, the tensioning force value of each section of the cable is determined, and the tensioning is implemented in a manner of "sectional, phased and sequential tensioning"; in the tensioning process, the one-way sliding support is used to realize the self-adaptive deformation of the structure, so that the pressure of the upper chord beam and the cable force are self-balanced;

[0061] The structure is shaped, after the tensioning is completed, the limiting steel plate of the one-way sliding displacement box in the sliding direction is removed, and the one-way sliding support is fixed by welding the bottom plate of the support and the bottom plate of the displacement box, so that the support is converted from the sliding state to the fixed state.

[0062] The above detailed description of the specific embodiments of the present application has been given to understand the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wind-resistant beam string structure, characterized by, The utility model relates to a cable-stayed structure, which comprises: a top chord (1), a cable (2), a support rod (3) and a support column (4); two ends of the cable (2) are hinged to two ends of the top chord (1), and the two ends of the top chord (1) are connected to the top of the support column (4) through a first connecting support (12) and a second connecting support (13) respectively, the first connecting support (12) or the second connecting support (13) is a one-way sliding support in the tensioning construction stage and is converted into a fixed support after the construction is completed; the cable (2) is arranged in sections, a plurality of first connecting pieces (11) are arranged on the axis of the top chord (1), one end of two sections of the cable (2) is directly hinged to the first connecting piece (11) at the position with the largest curvature change of the top chord (1) and the first connecting piece (11) at the adjacent position, and the remaining cables (2) are detachably connected through second connecting pieces (21); two ends of the support rod (3) are hinged to the adjacent first connecting piece (11) and the second connecting piece (21) respectively, the second connecting piece (21) is located at the sectioned connection position of the cable (2), and the projection points of the first connecting piece (11) and the second connecting piece (21) are staggered and distributed to form a triangular grid system together with the support rod (3).

2. The wind-resistant beam string structure according to claim 1, wherein The second connecting piece (21) is axisymmetric and comprises a first hinged plate (210) and a second hinged plate (211), the first hinged plate (210) is provided with a first pin hole (210a) for hinging with the cable (2), and the second hinged plate (211) is provided with a second pin hole (211a) for hinging with the end of the support rod (3).

3. The wind-resistant beam string structure according to claim 2, wherein The first hinged plate (210) and the second hinged plate (211) are integrally formed, the first hinged plate (210) has two symmetric axes, the second hinged plate (211) has one symmetric axis, one of the symmetric axes of the first hinged plate (210) and the symmetric axis of the second hinged plate (211) coincide with the symmetric axis of the second connecting piece (21), and the other symmetric axis of the first hinged plate (210) is perpendicular to the symmetric axis of the second connecting piece (21).

4. The wind-resistant beam string structure according to claim 2, wherein The end of the cable (2) is connected with a cable head lug plate (22), the cable head lug plate (22) is hinged to the first hinged plate (210) through a pin shaft penetrating the first pin hole (210a).

5. The wind resistant beam string structure of claim 2, wherein, The first connecting piece (11) comprises two third hinged plates (110) arranged in an axisymmetric manner, the support rod (3) is provided with two hinged lug plates at two ends, the second hinged plate (211) and the third hinged plate (110) are each provided with three hinged lug plates, and the hinged lug plates of the support rod (3) are hinged to the hinged lug plates of the second hinged plate (211) and the third hinged plate (110) through pin shafts.

6. The wind-resistant beam string structure according to claim 5, wherein A length adjusting mechanism is arranged on each cable (2) for adjusting the cable force of each cable (2).

7. The wind resistant beam string structure of claim 1, wherein, The first connecting support (12) or the second connecting support (13) is provided with a one-way sliding displacement box (5) at the bottom, and the one-way sliding displacement box (5) comprises a bottom plate (50), a limiting steel plate (51) and a pull hook (52).

8. The wind-resistant beam string structure according to claim 7, wherein The pull hook (52) is arranged 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).

9. The wind-resistant beam string structure according to any one of claims 1 to 8, characterized in that, The support column (4) has lateral stiffness, and is used for providing horizontal elastic support when the cable-stayed beam structure is subjected to wind suction force, so that the upper chord beam (1) and the support column (4) are cooperatively stressed.

10. The construction method of a wind-resistant beam string structure according to claim 8, characterized in that, The method comprises the following steps: installing a support structure, erecting and fixing the support columns on both sides, installing the first connecting support and the second connecting support on the top of the support columns, one of which is a one-way sliding support; connecting the two ends of the upper chord beam with the first connecting support and the second connecting support respectively; installing the cables and the support rods in sections, directly hingedly connecting one end of the two sections of the cable corresponding to the first connecting piece at the position where the curvature of the upper chord beam changes most and the first connecting piece at the adjacent position; detachably connecting the remaining sections of the cable through the second connecting piece in sequence, and hingedly connecting the ends of the first and last sections of the cable with the two ends of the upper chord beam, to form a complete cable system; hingedly connecting the two ends of the support rod with the adjacent first connecting piece and second connecting piece respectively, wherein the second connecting piece is located at the cable section connection position, and the projection points of the first connecting piece and the second connecting piece are staggered and distributed, and the support rod and the first connecting piece and the second connecting piece form a triangular grid system together; tensioning the cable, determining the tensioning force value of each section of the cable, and implementing tensioning in a "sectional, staged and sequential tensioning" manner; in the tensioning process, the one-way sliding support is used to realize self-adaptive deformation of the structure, so that the pressure of the upper chord beam and the cable force are self-balanced; structure finalization, after the tensioning is completed, the limiting steel plate of the one-way sliding displacement box in the sliding direction is removed, and the one-way sliding support is fixed by welding the support bottom plate and the displacement box bottom plate, so that the support is changed from the sliding state to the fixed state.

Images