Composite bridge structure supported by arched transverse partition

Abstract

The invention discloses a composite bridge structure supported by arched transverse partitions. The composite bridge structure comprises a concrete top plate, a concrete bottom plate, arched trusses and studs. The concrete top plate, the concrete bottom plate and the arched truss form a structure main body; the arched truss is formed by welding hollow steel pipes, a straight steel pipe frame is arranged on the outer side of the arched truss, and arched transverse partition steel pipes are arranged in the arched truss to jointly form a space truss system; studs are welded to the surfaces, making contact with a concrete top plate and a concrete bottom plate, of the arched trusses, and reliable combination of steel and concrete is achieved. A traditional solid concrete diaphragm plate is replaced by the light arched steel truss, the self weight of the structure is greatly reduced, the stress path is optimized, and the overall rigidity and stability of the box girder are improved. The structure is convenient for factory prefabrication and on-site rapid assembly, the construction efficiency is effectively improved, the construction cost is reduced, and a novel diaphragm solution which is excellent in performance, economical and practical is provided for medium and small span beam bridges.

Description

Technical Field

[0001] This invention belongs to the field of bridge engineering technology, specifically relating to a composite bridge structure with arched transverse supports suitable for small and medium-span beam bridges. Background Technology

[0002] Modern bridge structures are developing towards longer spans, lighter weight, and prefabrication. Traditional concrete box girder bridges typically incorporate multiple transverse diaphragms within the box girder to meet structural stiffness and stability requirements. These diaphragms are mostly solid concrete structures with enormous self-weight, increasing not only the bridge's dead load but also the amount of materials used. Furthermore, the long construction period for cast-in-place work restricts construction efficiency.

[0003] Furthermore, traditional diaphragms are mostly vertically installed, resulting in an unreasonable stress path. When subjected to vertical loads, stress concentration can easily occur at the connection points, posing a risk of cracking. At the same time, the heavy diaphragms also affect the internal space of the box girder bridge, causing inconvenience for later maintenance and inspection. Summary of the Invention

[0004] To address the aforementioned issues, there is an urgent need for a composite bridge structure with arched transverse supports. This structure can ensure and even enhance the overall stiffness and stability of the box girder while significantly reducing the structural weight, optimizing stress performance, and facilitating prefabrication and rapid construction.

[0005] The main objective of this invention is to overcome the technical shortcomings of traditional concrete diaphragms, such as heavy self-weight, poor load-bearing performance, and low construction efficiency, and to provide a composite bridge structure with arched diaphragm support. This structure replaces traditional concrete diaphragms with arched trusses welded from hollow steel pipes, fully utilizing the high strength of steel and the mechanical advantages of the arched structure. The arched trusses are reliably shear-resistantly connected to the concrete top and bottom slabs via studs, forming a collaborative composite system. This structure transforms traditional solid diaphragms into a highly efficient spatial truss structure with a clear force transmission path, significantly reducing structural self-weight, improving material utilization efficiency, and enabling full or partial prefabrication, thus significantly increasing construction speed. It provides an economical, efficient, and high-performance solution for small- and medium-span bridges.

[0006] To solve the technical problem of this invention, this invention is achieved through the following technical solution: An arch-shaped transversely supported composite bridge structure, comprising: Concrete roof slab; Concrete base slab; And the arched truss disposed between the concrete top slab and the concrete bottom slab; The arched truss specifically includes: Two side supports; And an arched support that is fixedly connected to the two side supports.

[0007] The side support includes: vertically arranged hollow steel pipes and diagonally arranged hollow steel pipes connected in an alternating manner.

[0008] The arched support includes: a circular arc-shaped hollow steel pipe, the two ends of which are welded to the vertically arranged hollow steel pipes of the two side supports.

[0009] Top plate studs are welded to the arched truss connected to the concrete roof slab. The top plate studs are interleaved with the reinforcing bars in the concrete roof slab.

[0010] The arched truss connected to the concrete base slab is welded with base plate studs. The base plate studs are interleaved with the reinforcing bars in the concrete base slab.

[0011] The concrete top slab, concrete bottom slab, and arched truss form the main body of the composite bridge structure.

[0012] Specifically, a composite bridge structure with arched transverse diaphragm support includes a concrete top slab, a concrete bottom slab, arched trusses, and studs. The concrete top slab, concrete bottom slab, and arched trusses form the main body of the composite bridge structure. The arched trusses are arranged between the concrete top slab and the concrete bottom slab, with arched transverse diaphragms arranged at intervals along the longitudinal direction of the bridge to provide transverse support. The arched trusses are all welded from hollow steel pipes. The outer side of the arched trusses is welded from straight steel pipes, and the inner side is welded from arched transverse diaphragm steel pipes, forming a stable spatial truss system. Studs are welded to the surfaces of the arched trusses that contact the concrete top slab and bottom slab. Through the interlocking action of the studs and concrete, the steel structure and the concrete structure are effectively combined and share the load.

[0013] This invention replaces traditional solid concrete diaphragms with lightweight arched steel trusses, significantly reducing the structure's self-weight, optimizing the stress path, and improving the overall stiffness and stability of the box girder. This structure facilitates factory prefabrication and rapid on-site assembly, effectively improving construction efficiency and reducing project costs, providing a high-performance, economical, and practical new diaphragm solution for small-to-medium span beam bridges.

[0014] Preferably, the arched truss is prefabricated in the factory to ensure welding quality and dimensional accuracy; Preferably, the arch axis of the arched transverse steel pipe inside the arched truss can be a reasonable arch axis such as a circular arc or a parabola, so as to optimize the stress state of the structure. A construction method for an arched transversely supported composite bridge structure includes the following steps: Step 1: Prefabricate the arched truss in the factory and complete the welding of all studs, then transport it to the site; Step 2: Locate and install the arched truss on site, precisely placing it in the designed position; Step 3: Erect the scaffolding and formwork for the concrete base slab; Step 4: Arrange and tie the reinforcing bars for the concrete base slab within the formwork; Step 5: Pour concrete for the concrete base slab, covering the studs at the bottom of the arched truss. Step 6: Erect the scaffolding and formwork for the concrete roof slab; Step 7: Arrange and tie the reinforcing bars for the concrete top slab within the formwork; Step 8: Pour concrete for the top slab, covering the studs at the top of the arched truss. Once the concrete reaches its designed strength, the formwork and supports are removed, thus forming a complete composite bridge structure.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. Lightweight and high-strength, economical: The use of hollow steel pipe truss structure to replace solid concrete diaphragms greatly reduces the self-weight of the structure, thereby reducing the load on the substructure and the amount of materials used, and lowering the project cost.

[0016] 2. Superior load-bearing performance: The arched truss fully utilizes the tensile and compressive properties of steel and the mechanical advantages of the arch structure, effectively converting vertical loads into axial pressure. The force transmission path is clear and efficient, significantly improving the stiffness and stability of the transverse bracing and enhancing the overall load-bearing performance of the box girder.

[0017] 3. Convenient and efficient construction: Arch trusses can be prefabricated in factories, and only positioning and concrete pouring are required on site. This greatly reduces the tedious procedures such as on-site formwork and reinforcement binding, shortens the construction cycle, and conforms to the development trend of modern bridge industrialization construction.

[0018] 4. Good structural integrity: The steel truss is reliably connected to the concrete top and bottom slabs through a large number of studs, ensuring that the two work together to form a high-performance steel-concrete composite structure with strong integrity and high durability. Attached Figure Description

[0019] Figure 1 This is a perspective view of the box girder structure of the present invention; Figure 2 This is a diagram showing the assembly of the various components of the present invention; Figure 3 This is a diagram of the welding nodes of the present invention; Reference numerals: 1. Concrete top slab, 2. Concrete bottom slab, 3. Arched truss, 4. Stud. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] like Figures 1 to 3 As shown, a composite bridge structure with arched transverse diaphragm support includes a concrete top slab 1, a concrete bottom slab 2, an arched truss 3, and studs 4. The arched truss 3 is disposed between the concrete top slab 1 and the concrete bottom slab 2, and the concrete top slab 1, the concrete bottom slab 2, and the arched truss 3 form the main body of the composite bridge structure.

[0022] The arched truss 3 is constructed from hollow steel tubes through welding. Its outer frame is formed by welding straight steel tubes, while its inner frame consists of welded arched transverse steel tubes, together forming a lightweight and high-strength spatial support system. Specifically, the arched truss 3 includes: two side supports; and arched supports fixedly connected to the two side supports. The side supports consist of vertically arranged hollow steel tubes and diagonally arranged hollow steel tubes connected alternately. The arched supports consist of arc-shaped hollow steel tubes, with both ends welded to the vertically arranged hollow steel tubes of the two side supports.

[0023] Numerous studs 4 are pre-welded to the upper and lower surfaces of the arched truss 3, i.e., the interfaces with the concrete top slab 1 and the concrete bottom slab 2. Top slab studs 4 are welded to the arched truss 3 connected to the concrete top slab 1. The top slab studs 4 are interlaced with the reinforcing bars in the concrete top slab 1. Bottom slab studs 4 are welded to the arched truss 3 connected to the concrete bottom slab 2. The bottom slab studs 4 are interlaced with the reinforcing bars in the concrete bottom slab 2.

[0024] Its construction method includes the following steps: Step 1: Prefabricate the arched truss 3 in the factory and complete the welding of all the studs 4, then transport it to the site; Step 2: Position and install the arched truss 3 on site, placing it precisely in the designed position; Step 3: Erect the support frame and formwork for concrete base slab 2; Step 4: Arrange and tie the reinforcing bars for the concrete base slab 2 within the formwork; Step 5: Pour concrete for the concrete base slab 2, and the concrete will cover the studs 4 at the bottom of the arched truss 3. Step 6: Erect the scaffolding and formwork for the concrete roof slab 1; Step 7: Arrange and tie the reinforcing bars for the concrete top slab 1 within the formwork; Step 8: Pour concrete for the top slab 1, with the concrete covering the studs 4 on the upper part of the arched truss 3. Once the concrete reaches its designed strength, the formwork and supports are removed, thus forming a complete composite bridge structure.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A composite bridge structure with arched transverse diaphragm support, characterized in that: include: Concrete roof slab; Concrete base slab; And the arched truss disposed between the concrete top slab and the concrete bottom slab; The arched truss specifically includes: Two side supports; And an arched support that is fixedly connected to the two side supports.

2. The composite bridge structure with arched transverse diaphragm support according to claim 1, characterized in that: The side support includes: vertically arranged hollow steel pipes and diagonally arranged hollow steel pipes connected in an alternating manner.

3. The composite bridge structure with arched transverse diaphragm support according to claim 2, characterized in that: The arched support includes: a circular arc-shaped hollow steel pipe, the two ends of which are welded to the vertically arranged hollow steel pipes of the two side supports.

4. The composite bridge structure with arched transverse diaphragm support according to claim 1, characterized in that: Top plate studs are welded onto the arched truss connected to the concrete roof slab.

5. The composite bridge structure with arched transverse diaphragm support according to claim 1, characterized in that: The top plate studs are interleaved with the reinforcing bars in the concrete top plate.

6. The composite bridge structure with arched transverse diaphragm support according to claim 1, characterized in that: The arched truss connected to the concrete base slab is welded with base plate studs.

7. The composite bridge structure with arched transverse diaphragm support according to claim 6, characterized in that: The base plate studs are interleaved with the reinforcing bars in the concrete base plate.

8. The composite bridge structure with arched transverse diaphragm support according to claim 1, characterized in that: The concrete top slab, concrete bottom slab, and arched truss form the main body of the composite bridge structure.

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