Tied-arch bridge

Abstract

The utility model belongs to the field of arch bridges, and discloses a tied-arch bridge which comprises a main span beam, side span beams and arch ribs. The main span beams extend in the bridge direction and bear vehicle loads and the weight of a bridge deck system. The side span beams are connected to the two ends of the main span beam in the bridge direction and can guide transmission of bridge deck loads, release the bending moment of the main span beam and reduce the rotating angle of the main span beam. The arch rib comprises a main arch rib and an auxiliary arch rib, the main arch rib is bent upwards, arch feet at the two ends of the main arch rib are connected to the two bridge-direction ends of the main span beam respectively, the arch foot at one end of the auxiliary arch rib is connected to the bridge-direction end of the side span beam, the arch foot at the other end of the auxiliary arch rib is connected to the main arch rib, and the main arch rib, the auxiliary arch rib and the side span beam define a triangular structure. By means of the geometric stability principle of a triangle, the corner displacement of the bridge end of the tied-arch bridge is effectively restrained, and the smoothness and comfort of driving on the bridge are improved. The structure can also reduce the destructive effect of the bending moment on the side span beam on the main span beam, and the overall durability and safety of the bridge are further enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of arch bridge technology, and more specifically, relates to a tied arch bridge. Background Technology

[0002] Tied-arch bridges are widely used in the bridge construction field. In existing tied-arch bridges, the arch ribs are supported at the upper ends of the piers. Under the influence of the bridge's own weight and moving loads such as those from vehicles, the beam ends experience rotation that affects ride comfort. When the arch span is small, this rotation does not significantly impact the bridge structure. However, when the span exceeds 120m, the large rotation caused by live loads not only significantly affects ride comfort but also causes substantial damage to bridge appurtenances, thus affecting the bridge's structural durability. Utility Model Content

[0003] The purpose of this application is to provide a tied arch bridge to solve the technical problem in the prior art where the ends of tied arch bridges are prone to rotation when subjected to large spans and active loads.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0005] A tied-arch bridge is provided, comprising:

[0006] The main span beam extends along the bridge direction;

[0007] Side span beams connect the two ends of the main span beam in the bridge direction;

[0008] The arch rib includes a main arch rib and a secondary arch rib. The main arch rib bends upward and the arch feet at both ends of the main arch rib are respectively connected to the two ends of the main span beam in the bridge direction. One end of the secondary arch rib is connected to the end of the side span beam in the bridge direction, and the other end of the secondary arch rib is connected to the main arch rib. The main arch rib, the secondary arch rib and the side span beam form a triangular structure.

[0009] As a further improvement to the above technical solution:

[0010] Optionally, it also includes a connecting structure, one end of which is connected to the main span beam and the other end of which is connected to the side span beam.

[0011] Optionally, the connection structure is a lattice structure, which includes at least three crossbeams arranged sequentially along the bridge direction.

[0012] Optionally, the two ends of the crossbeam have solid reinforced concrete structures, and the arch feet at both ends of the main arch rib are respectively fixed to the corresponding solid reinforced concrete structures.

[0013] Optionally, the main span beam, side span beam, and connecting structure are an integrated structure.

[0014] Optionally, it also includes at least two main piers, each of which is located at both ends of the main span beam in the bridge direction and is supported below the connecting structure at both ends of the main span beam in the bridge direction.

[0015] Optionally, it also includes a bridge abutment, which is supported at the bridge-direction end of the side span beam.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] The tied arch bridge provided in this application includes a main span beam, side span beams, and arch ribs. The main span beam, as the primary load-bearing structure of the tied arch bridge, extends along the bridge direction and bears the vehicle load and the weight of the bridge deck system. The side span beams connect to both ends of the main span beam along the bridge direction. The side span beams effectively guide the transfer of bridge deck loads, thereby releasing the bending moment of the main span beam and reducing its rotation angle. The arch ribs include a main arch rib and a secondary arch rib. The main arch rib bends upwards, and its arch feet at both ends connect to the two ends of the main span beam along the bridge direction. One arch foot of the secondary arch rib connects to the end of the side span beam along the bridge direction, and the other arch foot connects to the main arch rib. The main arch rib, secondary arch rib, and side span beams form a triangular structure, thus fully utilizing the geometric stability principle of triangles to effectively constrain the angular displacement at the bridge ends of the tied arch bridge, improving the smoothness and comfort of driving on the bridge. At the same time, the triangular structure can also reduce the destructive effect of the bending moment on the side span beam on the main span beam, further enhancing the overall durability and safety of the bridge. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the main structural view of the tied arch bridge of this application;

[0020] Figure 2 This is a partially enlarged structural diagram of the tied-arch bridge of this application. Figure 1 ;

[0021] Figure 3 This is a partially enlarged structural diagram of the tied-arch bridge of this application. Figure 2 .

[0022] The following are the labeling elements in the figure:

[0023] 1. Main span beam; 2. Side span beam;

[0024] 3. Arch rib; 31. Main arch rib;

[0025] 32. Secondary arch ribs; 4. Connecting structure;

[0026] 5. Main pier; 6. Abutment. Detailed Implementation

[0027] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0028] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0029] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0031] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of protection of this invention.

[0032] like Figure 1 and Figure 2 As shown, this application provides a tied arch bridge, including a main span beam 1, a side span beam 2, and an arch rib 3.

[0033] The main span beam 1, as the main load-bearing structure of the tied arch bridge, extends along the bridge direction (i.e., the longitudinal direction of the bridge) and bears the vehicle load and the weight of the bridge deck system. The side span beam 2 connects to both ends of the main span beam 1 along the bridge direction. The side span beam 2 can effectively guide the transfer of the bridge deck load, thereby releasing the bending moment of the main span beam 1 and reducing the rotation angle of the main span beam 1.

[0034] The arch rib 3 includes a main arch rib 31 and a secondary arch rib 32. The main arch rib 31 curves upward, and its arch feet at both ends are connected to the two ends of the main span beam 1 in the bridge direction. One end of the secondary arch rib 32 is connected to the end of the side span beam 2 in the bridge direction, and the other end of the secondary arch rib 32 is connected to the main arch rib 31. The main arch rib 31, the secondary arch rib 32, and the side span beam 2 form a triangular structure, which fully utilizes the geometric stability principle of triangles to effectively constrain the angular displacement at the ends of the tied arch bridge, improving the smoothness and comfort of driving on the bridge. At the same time, this triangular structure can also reduce the destructive effect of the bending moment on the side span beam 2 on the main span beam 1, further enhancing the overall durability and safety of the bridge.

[0035] like Figure 1 and Figure 2 As shown in a specific embodiment of this application, the tied arch bridge further includes a connecting structure 4. One end of the connecting structure 4 is connected to the main span beam 1, and the other end of the connecting structure 4 is connected to the side span beam 2, thereby connecting the main span beam 1 and the side span beam 2. The main span beam 1, the side span beam 2, and the connecting structure 4 have the same cross-sectional stiffness, so that the bending moment at the beam end of the main span beam 1 can be effectively transferred to the side span beam 2, thereby improving the stress performance of the bridge beam structure.

[0036] like Figure 3 As shown, in a specific embodiment of this application, the connecting structure 4 is specifically a lattice structure. A lattice structure is a rod system structure composed of steel sections, steel pipes, or composite section members connected together, often constructed as trusses and lattice columns. The lattice structure in this embodiment includes at least three crossbeams, which are arranged perpendicular to the main span beam 1. Each crossbeam is arranged sequentially along the longitudinal direction of the bridge (i.e., in the longitudinal direction of the bridge), which not only enhances the load-bearing capacity of the bridge but also effectively disperses loads from various directions, improving the overall durability and safety of the structure.

[0037] like Figure 3 As shown, in a specific embodiment of this application, the two ends of the crossbeam have solid reinforced concrete structures, and the arch feet at both ends of the main arch rib 31 are respectively fixed to the corresponding solid reinforced concrete structures. Compared with the traditional connection structure 4 being a solid reinforced concrete structure as a whole, this embodiment only sets solid reinforced concrete structures at both ends of the crossbeam, which can not only ensure the fixation of the arch feet at both ends of the main arch rib 31, but also reduce the amount of concrete and reduce the self-weight; it is not only convenient to design and construct, but also effectively reduces the size of the support.

[0038] In one specific embodiment of this application, the main span beam 1, the side span beam 2, and the connecting structure 4 are an integral structure, which not only has higher structural strength but also effectively transmits bending moments and loads on each segment. The continuous and integral structure of the main span beam 1, side span beam 2, and connecting structure 4 effectively overcomes the problem of large rotation angles caused by the bending moments at the beam ends of the main span beam 1, improves the spanning capacity of the main span beam 1, and also has advantages such as simple structure and convenient construction.

[0039] like Figure 1 and Figure 2 As shown, in one specific embodiment of this application, the tied arch bridge also includes at least two main piers 5 to ensure the overall support capacity of the bridge.

[0040] Each main pier 5 is located at both ends of the main span beam 1 in the bridge direction, ensuring that the main pier 5 can effectively share and transfer various loads generated by the main span beam 1 and vehicles, pedestrians, etc. above it. At the same time, the main pier 5 is also supported under the connecting structures 4 at both ends of the main span beam 1 in the bridge direction, thus forming a stable support system between the connecting structures 4 and the main pier 5, further enhancing the stability of the bridge in the lateral and longitudinal directions.

[0041] like Figure 1 and Figure 2 As shown, in one specific embodiment of this application, the tied arch bridge also includes an abutment 6. As a key supporting component in the bridge structure, the abutment 6 is located at the bridge-direction end of the side span beam 2, ensuring that the abutment 6 can effectively support and transmit various loads generated by the side span beam 2 and vehicles, pedestrians, etc. above it, thereby ensuring the overall stability and safety of the bridge.

[0042] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tied-arch bridge, characterized in that, include: The main span beam (1) extends along the bridge direction; Side span beam (2) is connected to both ends of the main span beam (1) in the bridge direction; The arch rib (3) includes a main arch rib (31) and a secondary arch rib (32). The main arch rib (31) bends upward, and the arch feet at both ends of the main arch rib (31) are respectively connected to the two ends of the main span beam (1) in the bridge direction. One end of the secondary arch rib (32) is connected to the end of the side span beam (2) in the bridge direction, and the other end of the secondary arch rib (32) is connected to the main arch rib (31). The main arch rib (31), the secondary arch rib (32) and the side span beam (2) form a triangular structure.

2. The tied-arch bridge as described in claim 1, characterized in that, It also includes a connecting structure (4), one end of which is connected to the main span beam (1), and the other end of which is connected to the side span beam (2).

3. The tied-arch bridge as described in claim 2, characterized in that, The connecting structure (4) is a lattice structure, which includes at least three crossbeams, and each crossbeam is arranged sequentially along the bridge direction.

4. The tied-arch bridge as described in claim 3, characterized in that, The two ends of the crossbeam have solid reinforced concrete structures, and the arch feet at both ends of the main arch rib (31) are respectively fixed to the corresponding solid reinforced concrete structures.

5. The tied-arch bridge as described in claim 2, characterized in that, The main span beam (1), the side span beam (2), and the connecting structure (4) are an integrated structure.

6. The tied-arch bridge as described in any one of claims 1 to 5, characterized in that, It also includes at least two main piers (5), each of which is located at both ends of the main span beam (1) in the bridge direction and is supported below the connecting structure (4) at both ends of the main span beam (1) in the bridge direction.

7. The tied-arch bridge as described in any one of claims 1 to 5, characterized in that, It also includes abutments (6) which are supported at the bridge-direction end of the side span beam (2).

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