Steel structure bridge arch connection node structure suitable for heavy traffic

Abstract

The utility model aims to provide a steel structure bridge arch connection node structure suitable for heavy traffic, which comprises a main beam, a straight beam and an inclined arched beam, a trousers-shaped fusion beam is connected at the fusion position of the end part of the straight beam and the end part of the inclined arched beam and the main beam, and a tie bar is arranged in the trousers-shaped fusion beam; the tie bar is in a V shape. The utility model relates to the technical field of steel structure bridges, connection between a straight beam and a trouser-shaped fusion beam, connection between an inclined arched beam and the trouser-shaped fusion beam and connection between a main beam and the trouser-shaped fusion beam are reinforced through tie bars, and effective dispersion and transmission of internal force are achieved. Therefore, when the internal force of the straight beam and the inclined arched beam is transmitted to the main beam through the trouser-shaped fusion beam, the sudden change of the internal force at the fusion part can be obviously reduced, so that the overall stability and safety of the bridge are improved. Due to the design of the lower lap joint table, when the inclined arched girder is assembled, the web of the inclined arched girder can be in lap joint on the lower lap joint table in advance. In the same way, the straight beam can be flush with the top face of the main beam through the upper lap joint table, and the assembling accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of steel structure bridge technology, specifically to a steel structure bridge arch connection node structure suitable for heavy traffic. Background Technology

[0002] In modern bridge engineering, inclined-leg rigid frame bridges are a common structural form, effectively improving structural load-bearing efficiency and spanning capacity through their unique beam-arch combination mechanical effects. To further optimize this structure, existing inclined-leg rigid frame bridge designs typically employ methods such as increasing the height of the box girder root and hollowing out the web at the box girder root to reduce the bridge's self-weight, thereby achieving greater spanning capacity and more efficient load-bearing performance. However, while this design improves structural efficiency to some extent, it also has limitations. Particularly at the beam-arch connection, due to structural design limitations, stress concentration is prone to occur. Stress concentration not only leads to excessive local stress but may also cause fatigue damage to materials, thus reducing the overall stability and safety of the bridge. Furthermore, in existing bridge structures, the connection between the main beam and the inclined arch beam is often relatively simple. This simple connection method often cannot effectively cope with complex stress conditions, resulting in uneven stress at the connection and a tendency for sudden changes in internal forces. These sudden changes in internal forces not only affect the bridge's service life but may also threaten its safety performance. Therefore, how to improve the construction of arch connection nodes in bridges to solve the problems of stress concentration and sudden changes in internal forces has become an urgent problem to be solved in the field of bridge engineering. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a structural design for arch connection nodes of steel bridges suitable for heavy-duty traffic, which solves the problems of stress concentration and sudden changes in internal forces in existing bridge arch connection nodes.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a steel structure bridge arch connection node structure suitable for heavy traffic, including a main beam, a straight beam and an inclined arch beam, wherein a trouser-shaped fusion beam is connected at the junction of the ends of the straight beam and the inclined arch beam with the main beam, and the trouser-shaped fusion beam is provided with tie rods inside;

[0005] The tie rod is V-shaped, and the three ends of the V-shaped tie rod form a first connection end, a second connection end, and a third connection end. The first connection end is fixed at the connection between the straight beam and the trouser-shaped fused beam, the second connection end is fixed at the connection between the inclined arch beam and the trouser-shaped fused beam, and the third connection end is fixed at the connection between the main beam and the trouser-shaped fused beam.

[0006] Preferably, there are at least two tie rods, which are respectively disposed on both sides of the inner cavity of the trouser-shaped fusion beam.

[0007] Preferably, the two sides of the trouser-shaped fusion beam are fixed with a front web plate and a back web plate. The front web plate includes an upper front web plate and a lower front web plate. The first connecting end is fixed on the upper front web plate, the second connecting end is fixed on the lower front web plate, and the third connecting end is fixed on the back web plate.

[0008] Preferably, the main beam includes a main beam web, which is fixedly connected to the back web; the straight beam includes a straight beam web, which is fixedly connected to the upper front web; and the inclined arch beam includes an inclined arch beam web, which is fixedly connected to the lower front web.

[0009] Preferably, the upper front web and the lower front web are staggered to form an upper overlapping platform, the straight beam overlaps on the overlapping platform, and the straight beam is flush with the top surface of the main beam.

[0010] Preferably, the lower front web is recessed inward to form a lower overlapping platform, and the web of the inclined arch beam protrudes outward and overlaps on the overlapping platform.

[0011] Preferably, the top of the straight beam, the trouser-shaped fused beam and the main beam, as well as the bottom of the inclined arch beam, the trouser-shaped fused beam and the main beam, are provided with steel strand holes for the steel strands to pass through.

[0012] Beneficial effects

[0013] By using the arch connection node structure for steel bridges suitable for heavy traffic provided by this utility model, and strengthening the connection between the straight beam and the trouser-shaped fused beam, the inclined arch beam and the trouser-shaped fused beam, and the main beam and the trouser-shaped fused beam through tie rods, effective dispersion and transmission of internal forces are achieved. This significantly reduces abrupt changes in internal forces at the fusion point when the internal forces of the straight beam and the inclined arch beam are transmitted to the main beam through the trouser-shaped fused beam, thereby improving the overall stability and safety of the bridge. After the three connection ends of the tie rod are fixed, a stable triangular support structure is formed, which not only enhances the load-bearing capacity of the trouser-shaped fused beam but also greatly improves its stability.

[0014] Furthermore, the lower overlapping platform design allows the web of the inclined arch beam to be pre-lapped on the platform during assembly, improving the assembly accuracy and making the hoisting process more convenient and efficient. Similarly, the upper overlapping platform ensures that the straight beam is flush with the top surface of the main beam, improving assembly accuracy, further guaranteeing the structural integrity, ensuring vehicle stability, and enhancing the bridge's durability and reliability under heavy traffic conditions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2This is the main view of the trouser-shaped integrated beam of this utility model;

[0017] Figure 3 This is a top view of the trouser-shaped integrated beam of this utility model;

[0018] Figure 4 This utility model Figure 1 Top view;

[0019] Figure 5 This is a schematic diagram of the straight beam structure of this utility model;

[0020] Figure 6 This is a schematic diagram of the inclined arch beam structure of this utility model.

[0021] Explanation of symbols in the diagram

[0022] 1. Main beam, 11. Main beam web, 2. Straight beam, 21. Straight beam web, 3. Inclined arch beam, 31. Inclined arch beam web, 4. Trouser-shaped fused beam, 5. Tie bar, 6. Back web, 7. Front web, 71. Upper front web, 72. Lower front web, 8. Upper lap joint, 9. Lower lap joint, 10. Steel strand hole. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Various changes can be made to the implementation scheme as long as the effects of the present invention can be achieved.

[0024] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0025] Reference Figure 1-6 The construction of the arch connection node of the steel structure bridge applicable to heavy traffic is described in this implementation plan.

[0026] like Figure 1 As shown, the structure includes a main beam 1, a straight beam 2, and an inclined arch beam 3. The ends of the straight beam 2 and the inclined arch beam 3, which are inclined at a certain angle, are connected to the main beam 1 by a trouser-shaped fusion beam 4, forming a stable structural system. The main beam 1 bears the main load, the straight beam 2 is set parallel to the main beam 1, and the inclined arch beam 3 is inclined at a certain angle to the main beam 1 to share the load of the main beam 1.

[0027] In one implementation, such as Figure 1 and Figure 5 and Figure 6As shown, the tops of the straight beam 2, the trouser-shaped fusion beam 4, and the main beam 1, as well as the bottoms of the inclined arch beam 3, the trouser-shaped fusion beam 4, and the main beam 1, are all provided with steel strand holes 10 for the steel strands to pass through. The main beam 1, the straight beam 2, the inclined arch beam 3, and the trouser-shaped fusion beam 4 are connected into one unit by the steel strands.

[0028] In this embodiment, the main beam 1, the straight beam 2, the inclined arch beam 3, and the trouser-shaped fusion beam 4 are all concrete box ducts. Among them, the straight beam 2 and the inclined arch beam 3 have small cross sections, the main beam 1 has a large cross section, and the trouser-shaped fusion beam 4 has a large cross section.

[0029] In a preferred embodiment, the trouser-shaped fusion beam 4 is provided with a tie rod 5 inside, the tie rod 5 is "V" shaped, and the tie rod 5 is longitudinally arranged inside the trouser-shaped fusion beam 4.

[0030] Specifically, the three ends of the V-shaped tie rod 5 form a first connecting end, a second connecting end, and a third connecting end. The first connecting end is fixed at the connection between the straight beam 2 and the trouser-shaped fusion beam 4, the second connecting end is fixed at the connection between the inclined arch beam 3 and the trouser-shaped fusion beam 4, and the third connecting end is fixed at the connection between the main beam 1 and the trouser-shaped fusion beam 4. By strengthening the connection between the straight beam 2 and the trouser-shaped fusion beam 4, the inclined arch beam 3 and the trouser-shaped fusion beam 4, and the main beam 1 and the trouser-shaped fusion beam 4 with the tie rod 5, the internal forces of the straight beam 2 and the inclined arch beam 3 can be distributed when transmitted to the main beam 1 through the trouser-shaped fusion beam 4, reducing the sudden change in internal forces at the fusion point, and strengthening the connection strength of the trouser-shaped fusion beam 4, making the trouser-shaped fusion beam 4 more rigid at this point.

[0031] There are at least two tie rods 5, which are respectively set on both sides of the inner cavity of the trouser-shaped fusion beam 4, so that the internal force is evenly distributed in the trouser-shaped fusion beam 4.

[0032] like Figure 2 As shown, the structural details of the trouser-shaped fusion beam are as follows: The trouser-shaped fusion beam 4 has a front web plate 7 and a back web plate 6 fixed on both sides. The front web plate 7 includes an upper front web plate 71 and a lower front web plate 72. The first connecting end of the tie rod 5 is fixed to the upper front web plate 71, the second connecting end is fixed to the lower front web plate 72, and the third connecting end is fixed to the back web plate 6. The three connecting ends, when connected, form a stable triangular support structure, enhancing the load-bearing capacity and stability of the trouser-shaped fusion beam 4.

[0033] In one implementation, such as Figure 1 and Figure 2 As shown, the main beam 1 includes a main beam web 11, which is fixedly connected to the back web 6; the straight beam 2 includes a straight beam web 21, which is fixedly connected to the upper front web 71; and the inclined arch beam 3 includes an inclined arch beam web 31, which is fixedly connected to the lower front web 72. This connection method ensures that the forces between the beams can be effectively transferred, improving the stability of the overall structure.

[0034] Furthermore, the upper front web 71 and lower front web 72 interlock to form an upper overlapping platform 8, on which the straight beam 2 overlaps, and the top surface of the straight beam 2 is flush with that of the main beam 1. The formation of the upper overlapping platform 8 allows the straight beam 2 to be pre-overlapped during assembly, improving the assembly accuracy of the straight beam 2, facilitating the hoisting process, and reducing construction difficulty. Additionally, the lower front web 7 is recessed inward to form a lower overlapping platform 9, on which the web 31 of the inclined arch beam protrudes outward and overlaps. The formation of the lower overlapping platform 9 allows the web 31 of the inclined arch beam 3 to be pre-overlapped on the lower overlapping platform 9 during assembly, improving the assembly accuracy of the inclined arch beam 3 and facilitating the hoisting process. The design of the upper overlapping platform 8 and the lower overlapping platform 9 ensures good integrity at the arch connection node of the steel structure bridge after the connection of the straight beam 2 and the inclined arch beam 3, guaranteeing stable traffic flow.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steel structure bridge arch connection node structure suitable for heavy traffic, comprising a main beam (1), a straight beam (2), and an inclined arch beam (3), characterized in that: The ends of the straight beam (2) and the inclined arch beam (3) are connected to the main beam (1) by a trouser-shaped fusion beam (4), and the trouser-shaped fusion beam (4) is provided with tie rods (5) inside; The tie rod (5) is V-shaped. The three ends of the tie rod (5) in the V-shape form a first connection end, a second connection end and a third connection end. The first connection end is fixed at the connection between the straight beam (2) and the trouser-shaped fusion beam (4). The second connection end is fixed at the connection between the inclined arch beam (3) and the trouser-shaped fusion beam (4). The third connection end is fixed at the connection between the main beam (1) and the trouser-shaped fusion beam (4).

2. The arch connection node structure for steel bridges suitable for heavy traffic as described in claim 1, characterized in that: There are at least two tie rods (5), which are respectively located on both sides of the inner cavity of the trouser-shaped fusion beam (4).

3. The arch connection node structure for steel bridges suitable for heavy traffic as described in claim 1, characterized in that: The trouser-shaped fusion beam (4) is fixed with a front web plate (7) and a back web plate (6) on both sides. The front web plate (7) includes an upper front web plate (71) and a lower front web plate (72). The first connecting end is fixed on the upper front web plate (71), the second connecting end is fixed on the lower front web plate (72), and the third connecting end is fixed on the back web plate (6).

4. The arch connection node structure for steel bridges suitable for heavy traffic as described in claim 3, characterized in that: The main beam (1) includes a main beam web (11), which is fixedly connected to the back web (6); the straight beam (2) includes a straight beam web (21), which is fixedly connected to the upper front web (71); the inclined arch beam (3) includes an inclined arch beam web (31), which is fixedly connected to the lower front web (72).

5. A steel structure bridge arch connection node structure suitable for heavy traffic as described in claim 4, characterized in that: The upper front web (71) and the lower front web (72) intersect to form an upper overlapping platform (8), and the straight beam (2) overlaps on the overlapping platform (8). The straight beam (2) is flush with the top surface of the main beam (1).

6. The arch connection node structure for steel bridges suitable for heavy traffic as described in claim 4, characterized in that: The lower front web (7) is recessed inward to form a lower overlapping platform (9), and the oblique arch beam web (31) protrudes outward and overlaps on the overlapping platform (9).

7. The arch connection node structure for steel bridges suitable for heavy traffic as described in claim 1, characterized in that: The top of the straight beam (2), the trouser-shaped fusion beam (4) and the main beam (1), as well as the bottom of the inclined arch beam (3), the trouser-shaped fusion beam (4) and the main beam (1), are all provided with steel strand holes (10) for the steel strands to pass through.

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