Large-span composite structure

Abstract

To provide a large-span composite structure that solves the defects of a relatively large occupied space and low construction safety existing in the conventional large-span structure, or the problem that the construction process is complicated and difficult to construct. 【Solution means】 The large-span composite structure includes at least two first columns 1 and a first cross beam 2 having a first bone beam, a first structural reinforcement, and a first waist reinforcement. The first structural reinforcement is fixed to the first bone beam through the first fixing reinforcement. Both ends of the first tension reinforcement are respectively connected to the first waist reinforcement and the first structural reinforcement. One end of the second cross beam 3 is connected to the first column, and the other end is connected to the second column 4. The second cross beam is collinear with the first cross beam.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, and specifically to large-span composite structures.

Background Art

[0002] A reinforced concrete structure is composed of steel bars and concrete. Concrete has excellent compressive performance, and steel bars have good tensile performance. The two cooperate to bear forces. As a result, the reinforced concrete structure has a relatively high load-bearing capacity and can effectively support the weight of the building itself and various service loads.

[0003] In buildings with a reinforced concrete structure as the main structure, it is often necessary to achieve a large span to meet special functional requirements. For example, in a lecture hall, a large-span design can avoid columns blocking the line of sight and provide a good view for the audience. In a large exhibition hall, a large-span design can create a large column-free space and facilitate the display of exhibits. However, how to optimize the design to achieve the large-span space demand is a difficult point in construction practice.

[0004] In related technologies, a grid ceiling structure or a post-tensioning method prestressed beam is always adopted to achieve a large span. The grid ceiling structure realizes a large span by increasing the cross-section of the beam-column and increasing the steel reinforcement. However, the enlarged beam-column occupies more space, and after the cross-section of the beam becomes larger, the concentrated line load of the beam becomes larger. Also, the number of steel bars is large, which affects the construction safety and quality. The post-tensioning method involves multiple links such as a preliminary duct, strand penetration, tensioning, and grout injection. The construction process is complex, and the construction period is long. Moreover, in the grout injection of the duct, a situation where the grout injection is not tight is likely to occur, making it difficult to construct.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In view of this, the present invention provides a large-span composite structure that solves the defects of the conventional large-span structure, such as a relatively large occupied space and low construction safety, or the problem that the construction process is complex and difficult to construct.

Means for Solving the Problems

[0006] The present invention provides a large-span composite structure, including first columns provided at intervals along a first direction, with at least two of them; a first cross beam connected to at least two of the first columns and having a first main beam, first structural bars, and first waist bars. The first main beam, first structural bars, and first waist bars all extend along the length direction of the first cross beam. The first waist bar and the first main beam are provided at intervals. The first structural bar is fixed to the first main beam via a first fixing bar. The first cross beam further has a first tension bar, and both ends of the first tension bar are respectively connected to the first waist bar and the first structural bar. A second cross beam has one end connected to the first column and the other end connected to a second column. The second cross beam is collinear with the first cross beam. The connection structure between the first column and the first cross beam is defined as a cross part, and the connection structure between the second cross beam and the second column is defined as an extending part. At least two of the extending parts are respectively connected to opposite sides along the first direction of the cross part.

[0007] In an alternative embodiment, the length of the cross part in the first direction is D, where 0 < D ≤ 23.1 m.

[0008] In an alternative embodiment, a plurality of the cross parts are provided at intervals along a second direction. A plurality of the extending parts are provided, and each of the plurality of extending parts is connected to a plurality of the cross parts. The adjacent cross parts are connected via a first longitudinal beam and a first auxiliary beam. Both ends of the first longitudinal beam are respectively connected to the first columns, and both ends of the first auxiliary beam are respectively connected to the first cross beam. The adjacent extending parts are connected via a second longitudinal beam and a second auxiliary beam. Both ends of the second longitudinal beam are respectively connected to the second columns, and both ends of the second auxiliary beam are respectively connected to the second cross beam. Here, the second direction is perpendicular to the first direction.

[0009] In an alternative embodiment, the cross-sectional shape of the first trabecula is H-shaped, the first trabecula has a first web plate, the first structural rib is fixed to the first web plate via the first fixing rib, and both ends of the first fixing rib are fixed to the first structural rib and the first web plate respectively.

[0010] In an alternative embodiment, the first cross beam further has a first hoop rib and a first longitudinal rib, the first longitudinal rib is provided along the extending direction of the first cross beam, and the first hoop rib is connected to the first longitudinal rib.

[0011] In an alternative embodiment, the first column has a bone column, a main rib and a second hoop rib, both the bone column and the main rib extend along the height direction of the first column, and the second hoop rib is connected to the main rib.

[0012] In an alternative embodiment, fitting parts are respectively provided at both ends of the first tension rib, the fitting parts are fitted and connected to the first lumbar rib or the first structural rib, and the first tension rib is provided with a shift relative to the first fixing rib.

[0013] In an alternative embodiment, a plurality of the first structural ribs are respectively fixed to opposite sides of the first web plate, a plurality of the first lumbar ribs are respectively provided on opposite sides of the first web plate, the first lumbar ribs and the first structural ribs located on the same side of the first web plate correspond to each other one by one, a plurality of the first tension ribs are provided, and the plurality of the first tension ribs are respectively connected to the corresponding first structural ribs and first lumbar ribs.

[0014] In an alternative embodiment, the second cross beam has a second rib, a second structural reinforcement, and a second waist reinforcement. The second rib, the second structural reinforcement, and the second waist reinforcement all extend along the length direction of the second cross beam. The second waist reinforcement and the second rib are provided at intervals. The second structural reinforcement is fixed to the second rib via a second fixing reinforcement. The second cross beam further has a second tension reinforcement. Both ends of the second tension reinforcement are respectively connected to the second waist reinforcement and the second structural reinforcement. The cross-sectional shape of the second rib is an H shape. The second rib has a second web plate. The second structural reinforcement is fixed to the second web plate via the second fixing reinforcement. Both ends of the second fixing reinforcement are respectively fixed to the second structural reinforcement and the second web plate. The second cross beam further has a third hoop reinforcement and a third longitudinal reinforcement. The third longitudinal reinforcement is provided along the extending direction of the second cross beam. The third hoop reinforcement is connected to the third longitudinal reinforcement.

Advantages of the Invention

[0015] The first structural reinforcement is reasonably arranged inside the first cross beam. The first structural reinforcement is welded and fixed to the first rib via the first fixing reinforcement. At the same time, the first structural reinforcement and the first waist reinforcement are connected by the first tension reinforcement, so that each partial structure inside the first cross beam is integrally connected, greatly improving the load-bearing capacity of the first cross beam. At the same time, the cross-sectional dimensions of the first cross beam do not change, preventing it from occupying a large amount of construction space, meeting the construction requirements of large-span buildings, having a small number of steel bars, high construction safety, and being provided with extending parts on both sides of the large-span composite structure, which can improve the load-bearing capacity of the overall structure. At the same time, the construction process is simple, the construction process is easy, the force-bearing performance of the beam body is stable, and the practicability is strong.

[0016] The large-span composite structure according to this embodiment can carry relatively large longitudinal and horizontal loads with relatively small cross-sectional dimensions, providing reliable structural support for the building and meeting the complex force-bearing requirements of large spans.

[0017] By providing the extending part, the structural rigidity can be effectively improved, the deformation can be effectively controlled, the stability can be maintained, the seismic performance can be enhanced, the energy consumption can be participated in during an earthquake, the safety of the structure can be guaranteed, which is beneficial to the good realization of the large-span space function.

[0018] To more clearly explain the specific embodiments of the present invention or the technical solutions in the prior art, the drawings necessary for the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative labor.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present invention.

[0021] In the description of the present invention, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is the orientation or positional relationship shown based on the drawings, and is merely for facilitating and simplifying the description of the present invention, and does not indicate or imply that such a device or element must have a specific orientation or be configured and operated in a specific orientation, so it does not limit the present invention. Also, the terms "first", "second", "third" are merely used for the purpose of description and do not indicate or imply relative importance.

[0022] In the description of the present invention, unless there are specific and clear regulations and limitations, the terms "attachment", "connection", "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection, and may be a mechanical connection or an electrical connection, and may be a direct connection or an indirect connection through an intermediate medium, or may be the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.

[0023] Also, regarding the technical features according to different embodiments of the present invention described below, they can be combined with each other as long as they do not conflict with each other.

[0024] Hereinafter, with reference to FIGS. 1 to 6, embodiments of the present invention will be described.

[0025] According to an embodiment of the present invention, a large-span composite structure is provided, including at least two first columns 1 spaced apart along a first direction, and a first cross beam 2 connected to at least two of the first columns 1 and having a first main beam 21, a first structural reinforcement 22, and a first lateral reinforcement 23. The first main beam 21, the first structural reinforcement 22, and the first lateral reinforcement 23 all extend along the length direction of the first cross beam 2. The first lateral reinforcement 23 and the first main beam 21 are spaced apart, and the first structural reinforcement 22 is fixed to the first main beam 21 via a first fixing reinforcement 24. The first cross beam 2 further has a first tension reinforcement 25, and both ends of the first tension reinforcement 25 are respectively connected to the first lateral reinforcement 23 and the first structural reinforcement 22. One end of a second cross beam 3 is connected to the first column 1, and the other end is connected to a second column 4. The second cross beam 3 is collinear with the first cross beam 2. A connection structure between the first column 1 and the first cross beam 2 is defined as a cross part 5, and a connection structure between the second cross beam 3 and the second column 4 is defined as an extending part 6. At least two of the extending parts 6 are respectively connected to opposite sides along the first direction of the cross part 5.

[0026] Here, the first column 1 is a steel-concrete frame column, referring to a composite column formed by adding a steel shape (such as an H-shaped steel, I-shaped steel) to a reinforced concrete column. Both the first cross beam 2 and the second cross beam 3 are steel-concrete frame beams, referring to composite beams formed by adding a steel shape (such as an H-shaped steel, I-shaped steel) to a reinforced concrete beam.

[0027] Specifically, based on the cross distance, which is the span of the large-span composite structure, the cross portion 5 is arranged. In this embodiment, the two first columns 1 are provided at intervals along the first direction. The maximum value of the interval distance is 23.1 m, reaching the maximum span D of the large-span composite structure at 23.1 m. A first cross beam 2 is provided between the two first columns 1. The section steel of the first cross beam 2 is welded and fixed to the section steel of the first column 1. The first cross beam 2 extends along the first direction, and extension portions 6 are respectively provided on both sides of the cross portion 5 along the first direction. The extension portion 6 includes a second cross beam 3 and a second column 4, playing a role in improving the load-bearing capacity of the overall structure. One end of the second cross beam 3 of the extension portion 6 is connected to the first column 1. The second cross beam 3 extends along the first direction and is collinear with the first cross beam 2. The second column 4 is connected to the other end of the second cross beam 3.

[0028] Specifically, the first cross beam 2 is provided with first structural steel bars 22 inside. The first structural steel bars 22 are welded and fixed to the first main beam 21 through first fixing steel bars 24, which are short steel bars. The first structural steel bars 22 are further connected to the first web steel bars 23 by first tension steel bars 25, integrally connecting each partial structure inside the first cross beam 2, without affecting the cross-sectional dimensions of the first cross beam 2, greatly improving the load-bearing capacity of the first cross beam 2, not occupying extra construction space, with fewer steel bars and high construction safety.

[0029] Regarding the large-span composite structure according to this embodiment, the first structural steel bars 22 are reasonably arranged inside the first cross beam 2. The first structural steel bars 22 are welded and fixed to the first main beam 21 through the first fixing steel bars 24. At the same time, the first structural steel bars 22 and the first web steel bars 23 are connected by the first tension steel bars 25. Thereby, each partial structure inside the first cross beam 2 is integrally connected, greatly improving the load-bearing capacity of the first cross beam 2. At the same time, the cross-sectional dimensions of the first cross beam 2 do not change, preventing the occupation of a large amount of construction space, meeting the construction requirements of large-span buildings, with fewer steel bars and higher construction safety. In addition, by providing the extension portions 6 on both sides of the large-span composite structure, the load-bearing capacity of the overall structure can be improved. At the same time, the construction process is simple, the construction process is easy, the force-bearing performance of the beam body is stable, and the practicability is strong.

[0030] The large-span composite structure according to this embodiment can carry relatively large vertical and horizontal loads with relatively small cross-sectional dimensions, provide reliable structural support for buildings, and meet the complex force-bearing requirements of large spans.

[0031] In the large-span composite structure according to this embodiment, by providing the extending portion 6, the structural rigidity is effectively improved, the deformation is effectively controlled, the stability is maintained, the seismic performance is enhanced, the energy consumption is participated in during an earthquake, the safety of the structure is guaranteed, which is advantageous for the good realization of the large-span space function.

[0032] In some embodiments, as shown in FIG. 1, the length of the cross portion 5 in the first direction is D, where 0 < D ≤ 23.1 m.

[0033] Specifically, the length D is the cross distance of the cross portion 5 or the large-span composite structure. In this embodiment, the maximum span of the large-span composite structure reaches 23.1 m, and the actual span size is determined according to the needs of the building. Specifically, it may be 20 m, 21 m, 22 m, but is not limited thereto.

[0034] In some embodiments, as shown in FIG. 1, a plurality of the cross portions 5 are provided, and the plurality of cross portions 5 are provided at intervals along the second direction. A plurality of the extending portions 6 are provided, and the plurality of extending portions 6 are respectively connected to the plurality of cross portions 5. The space between adjacent cross portions 5 is connected via a first longitudinal beam 51 and a first secondary beam 52, and both ends of the first longitudinal beam 51 are respectively connected to a first column 1. Both ends of the first secondary beam 52 are respectively connected to a first cross beam 2. The space between adjacent extending portions 6 is connected via a second longitudinal beam 61 and a second secondary beam 62. Both ends of the second longitudinal beam 61 are respectively connected to a second column 4, and both ends of the second secondary beam 62 are respectively connected to a second cross beam 3, where the second direction is perpendicular to the first direction.

[0035] Specifically, the plurality of first vertical columns 1 are provided at uniform intervals along the second direction, and the interval distance may be 5.1 m. A first cross beam 2 is connected between two adjacent first vertical columns 1 that overlap when projected in the first direction, and a first longitudinal beam 51 is connected between two adjacent first vertical columns 1 that overlap when projected in the second direction. A first secondary beam 52 is connected between two adjacent and parallel first cross beams 2, and the plurality of first secondary beams 52 are provided at intervals along the extending direction of the first cross beam 2. Further, extending portions 6 are provided on both opposite sides of the plurality of cross portions, and the plurality of second cross beams 3 are respectively connected to the first vertical columns 1. A second secondary beam 62 is connected between two adjacent second cross beams 3 in the second direction, and the plurality of second secondary beams 62 are provided at intervals along the extending direction of the second cross beam 3.

[0036] Specifically, both the first longitudinal beam 51 and the second longitudinal beam 61 are frame beams. The first longitudinal beam 51 has a width of 500 mm and a height of 700 mm, and four first longitudinal steel bars with a diameter of 22 mm are arranged on the upper part of the beam body, and five second longitudinal steel bars with a diameter of 22 mm are arranged on the lower part. Here, the extending direction of the first longitudinal steel bars coincides with the extending direction of the first longitudinal beam 51. The second longitudinal beam 61 has a width of 300 mm and a height of 600 mm, and two second longitudinal steel bars with a diameter of 22 mm are arranged on the upper part of the beam body. Four second longitudinal steel bars with a diameter of 20 mm are arranged on the lower part, and here, the extending direction of the second longitudinal steel bars coincides with the extending direction of the second longitudinal beam 61.

[0037] In some embodiments, as shown in FIGS. 2 and 3, the cross-sectional shape of the first rib beam 21 is H-shaped, and the first rib beam 21 has a first web plate 211. The first structural reinforcement 22 is fixed to the first web plate 211 via the first fixing reinforcement 24. Both ends of the first fixing reinforcement 24 are fixed to the first structural reinforcement 22 and the first web plate 211, respectively.

[0038] Specifically, the first fixing reinforcement 24 is a short steel bar, and the first structural reinforcement 22 is a structural steel bar. The short steel bar is arranged perpendicular to the structural steel bar and the first web plate 211, and both ends are welded to the structural steel bar and the web plate, respectively.

[0039] In some embodiments, as shown in FIG. 2, the first cross beam 2 further has a first hoop bar 26 and a first longitudinal bar 27, and the first longitudinal bar 27 is provided along the extending direction of the first cross beam 2.

[0040] Specifically, the first cross beam 2 has a cross-sectional width of 450 mm and a cross-sectional height of 1300 mm, and the first girder 21 is an H-shaped steel. The first girder 21 has a cross-sectional height of 900 mm, a flange width of 250 mm, a web plate thickness of 25 mm, and a flange thickness of 32 mm. Studs are provided on the first girder 21 and arranged along the entire length of the beam. Six first longitudinal bars 27 with a diameter of 25 mm are arranged on the upper part of the first cross beam 2, and ten first longitudinal bars 27 with a diameter of 25 mm are arranged on the lower part. Side longitudinal reinforcing bars which are the first waist bars 23 with a diameter of 16 mm are arranged on both sides of the first cross beam 2 and are used to control the shrinkage and temperature cracks of the concrete and improve the torsional resistance performance of the beam. The diameter of the first hoop bar 26 is 12 mm, and there are four first hoop bars 26 in each cross section.

[0041] In some embodiments, as shown in FIG. 6, the first column 1 has a steel column 11, main reinforcement bars 12, and a second hoop bar 13. Both the steel column 11 and the main reinforcement bars 12 extend along the height direction of the first column 1, and the second hoop bar 13 is connected to the main reinforcement bars 12.

[0042] Specifically, the steel column 11 is a steel pipe column 11, and the steel column 11 is in the same extending direction as the first column 1. The first column 1 has a cross-sectional width of 1000 mm and a cross-sectional height of 800 mm. Twenty main reinforcement bars 12 with a diameter of 25 mm are arranged in the column and are uniformly distributed around the four sides of the column cross section. The main reinforcement bars 12 are in the same extending direction as the first column 1 and are used to bear the axial force and bending moment. Both ends of the second hoop bar 13 are connected to the main reinforcement bars 12 at different positions. A plurality of second hoop bars 13 are respectively fitted and connected to the main reinforcement bars 12 two by two. Studs are provided on the steel column 11 and arranged along the entire length of the column body.

[0043] In some embodiments, as shown in FIG. 2, both ends of the first tension bar 25 are respectively provided with fitting portions 251. The fitting portions 251 are fitted and connected to the first waist bar 23 or the first structural bar 22, and the first tension bar 25 is provided by shifting it with respect to the first fixing bar 24.

[0044] Specifically, the fitting portion 251 may be a buckle having an opening. The fitting portion 251 is fitted to the bar body of the first waist bar 23 or the first structural bar 22, and the buckle is fitted and connected to the bar body. The fitting portion 251 at the end of the first tension bar 25 connected to the first structural bar 22 is provided by shifting it with respect to the first fixing bar 24 to prevent interference.

[0045] In some embodiments, as shown in FIG. 2, a plurality of the first structural bars 22 are respectively fixed to opposite sides of the first web plate 211, and a plurality of the first waist bars 23 are respectively provided on opposite sides of the first web plate 211. The first waist bars 23 and the first structural bars 22 located on the same side of the first web plate 211 correspond to each other one-to-one, and a plurality of the first tension bars 25 are provided. The plurality of the first tension bars 25 are respectively connected to the corresponding first structural bars 22 and first waist bars 23.

[0046] Specifically, the first waist bar 23 is provided on the edge beam body of the first cross beam 2 and is at a certain distance from the first web plate 211. The first structural bar 22 is provided close to the first web plate 211 and is fixed to the first web plate 211 via the first fixing bar 24 which is a short reinforcing bar. The first tension bar 25 is fitted and connected to the first waist bar 23 and the first structural bar 22.

[0047] In some embodiments, as shown in FIGS. 4 and 5, the second cross beam 3 has a second rib beam 31, a second structural reinforcement 32, and a second waist reinforcement 33. The second rib beam 31, the second structural reinforcement 32, and the second waist reinforcement 33 all extend along the length direction of the second cross beam 3, and the second waist reinforcement 33 and the second rib beam 31 are provided at intervals. The first structural reinforcement 22 is fixed to the first rib beam via the second fixing reinforcement 34, and the second cross beam 3 further has a second tension reinforcement 35. Both ends of the second tension reinforcement 35 are respectively connected to the second waist reinforcement 33 and the second structural reinforcement 32, and the cross-sectional shape of the second rib beam 31 is H-shaped. The second rib beam 31 has a second web plate 311, and the second structural reinforcement 32 is fixed to the second web plate 311 via the second fixing reinforcement 34. Both ends of the second fixing reinforcement 34 are respectively fixed to the second structural reinforcement 32 and the second web plate 311. The second cross beam 3 further has a third hoop reinforcement 36 and a third longitudinal reinforcement 37, and the third longitudinal reinforcement 37 is provided along the extending direction of the second cross beam 3.

[0048] Specifically, the second cross beam 3 has a cross-sectional width of 450 mm and a cross-sectional height of 900 mm, and the second rib beam 31 is an H-shaped steel. The second rib beam 31 has a cross-sectional height of 600 mm, a flange width of 250 mm, a web plate thickness of 16 mm, and a flange thickness of 30 mm. Studs are provided on the second rib beam 31 and are arranged along the entire length of the beam. Six third longitudinal reinforcements 37 with a diameter of 25 mm are arranged on the upper part of the second cross beam 3, and six third longitudinal reinforcements 37 with a diameter of 25 mm are arranged on the lower part. On both sides of the second cross beam 3, side longitudinal reinforcements which are second waist reinforcements 33 with a diameter of 14 mm are arranged and are used to control the shrinkage and temperature cracks of the concrete and improve the torsional resistance performance of the beam. The diameter of the third hoop reinforcement 36 is 10 mm, and there are four third hoop reinforcements 36 in each cross section.

[0049] Obviously, the above embodiments are merely examples for clear explanation and do not limit the embodiments. Although the embodiments of the present invention have been described with reference to the drawings, those skilled in the art can make various modifications and deformations without departing from the spirit and scope of the present invention, and such modifications and deformations fall within the scope limited by the present invention.

Description of Reference Numerals

[0050] 1 First vertical column 2 First cross beam, 3 Second cross beam 4 Second vertical column 5 Cross part 6 Extension part 11 Bone column 12 Main reinforcement 13 Second hoop reinforcement 21 First bone beam 22 First structural reinforcement 23 First waist reinforcement 24 First fixing reinforcement 25 First tensile reinforcement 26 First hoop reinforcement 27 First longitudinal reinforcement 31 Second bone beam 32 Second structural reinforcement 33 Second waist reinforcement 34 Second fixing reinforcement 35 Second tensile reinforcement 36 Third hoop reinforcement 37 Third longitudinal reinforcement 51 First longitudinal beam 52 First secondary beam 61 Second longitudinal beam 62 Second secondary beam 211 First web plate 251 Fitting part 311 Second web plate

Claims

1. A large-span composite structure, comprising: a first column (1), and at least two of the first columns (1) are provided at intervals along a first direction; a first cross beam (2) connected to at least two of the first columns (1) and having a first main beam (21), a first structural reinforcement (22), and a first waist reinforcement (23); the first main beam (21), the first structural reinforcement (22), and the first waist reinforcement (23) all extend along the length direction of the first cross beam (2); the first waist reinforcement (23) and the first main beam (21) are provided at intervals, and the first structural reinforcement (22) is fixed to the first main beam (21) via a first fixing reinforcement (24); the first cross beam (2) further has a first tension reinforcement (25), and both ends of the first tension reinforcement (25) are respectively connected to the first waist reinforcement (23) and the first structural reinforcement (22); a second cross beam (3) has one end connected to the first column (1) and the other end connected to a second column (4), and the second cross beam (3) is collinear with the first cross beam (2); defining a connection structure between the first column (1) and the first cross beam (2) as a cross part (5); defining a connection structure between the second cross beam (3) and the second column (4) as an extension part (6), and at least two of the extension parts (6) are respectively connected to opposite sides along the first direction of the cross part (5). The large-span composite structure is characterized in that.

2. The length of the cross part (5) in the first direction is D, where 0 < D ≤ 23.1 m. The large-span composite structure according to Claim 1 is characterized in that.

3. A plurality of the cross parts (5) are provided, and the plurality of cross parts (5) are provided at intervals along a second direction; a plurality of the extension parts (6) are provided, and the plurality of extension parts (6) are respectively connected to the plurality of cross parts (5); adjacent cross parts (5) are connected via a first longitudinal beam (51) and a first secondary beam (52), both ends of the first longitudinal beam (51) are respectively connected to the first column (1), and both ends of the first secondary beam (52) are respectively connected to the first cross beam (2); adjacent extension parts (6) are connected via a second longitudinal beam (61) and a second secondary beam (62), both ends of the second longitudinal beam (61) are respectively connected to the second column (4), and both ends of the second secondary beam (62) are respectively connected to the second cross beam (3). The large-span composite structure according to claim 2, wherein the second direction is orthogonal to the first direction.

4. The cross-sectional shape of the first girder (21) is H-shaped, and the first girder (21) has a first web plate (211). The large-span composite structure according to claim 1, wherein the first structural rib (22) is fixed to the first web plate (211) via the first fixing rib (24), and both ends of the first fixing rib (24) are fixed to the first structural rib (22) and the first web plate (211), respectively.

5. The large-span composite structure according to claim 4, wherein the first transverse beam (2) further has a first hoop rib (26) and a first longitudinal rib (27), and the first longitudinal rib (27) is provided along the extending direction of the first transverse beam (2).

6. The first column (1) has a bone column (11), a main rib (12), and a second hoop rib (13). Both the bone column (11) and the main rib (12) extend along the height direction of the first column (1). The large-span composite structure according to claim 1, wherein the second hoop rib (13) is connected to the main rib (12).

7. Fitting portions (251) are respectively provided at both ends of the first tension rib (25), and the fitting portions (251) are fitted and connected to the first waist rib (23) or the first structural rib (22). The large-span composite structure according to claim 4, wherein the first tension rib (25) is provided with a shift relative to the first fixing rib (24).

8. A plurality of the first structural ribs (22) are respectively fixed to opposite sides of the first web plate (211). A plurality of the first waist ribs (23) are respectively provided on opposite sides of the first web plate (211), and the first waist ribs (23) and the first structural ribs (22) located on the same side of the first web plate (211) correspond to each other one-to-one. The large-span composite structure according to claim 4, wherein a plurality of the first tension ribs (25) are provided, and the plurality of the first tension ribs (25) are respectively connected to the corresponding first structural ribs (22) and the first waist ribs (23).

9. The second transverse beam (3) has a second girder (31), a second structural rib (32), and a second waist rib (33). The second girder (31), the second structural rib (32), and the second waist rib (33) all extend along the length direction of the second transverse beam (3). The second lumbar muscle tendon (33) and the second bone beam (31) are provided at intervals, and the second structural tendon (32) is fixed to the second bone beam (31) via a second fixing tendon (34). The second cross beam (3) further has a second tension tendon (35), and both ends of the second tension tendon (35) are respectively connected to the second lumbar muscle tendon (33) and the second structural tendon (32). The cross-sectional shape of the second bone beam (31) is H-shaped, and the second bone beam (31) has a second web plate (311). The second structural tendon (32) is fixed to the second web plate (311) via the second fixing tendon (34), and both ends of the second fixing tendon (34) are respectively fixed to the second structural tendon (32) and the second web plate (311). The second cross beam (3) further has a third hoop tendon (36) and a third longitudinal tendon (37), and the third longitudinal tendon (37) is provided along the extending direction of the second cross beam (3). The large-span composite structure according to claim 5, characterized in that.

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