Arch foot node of tied-arch bridge
By using technical means such as solid casting and arc transition plates at the arch foot node of the tied arch bridge, the problems of complex welding processes and high residual stresses are solved, and the structural design is simplified and construction quality is improved.
Patent Information
- Application Number
- CN202420855422.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The welding process of the arch foot nodes of the existing tie-piece arch bridge is complicated, which leads to high welding difficulties and high residual stresses, which can easily cause welding defects.
Solid casting is adopted at the intersection of the arch rib section, the beam section and the beam section to reduce the complexity of welding; an arc transition plate is installed between the arch rib section and the beam section, and chamfer transition is adopted at the connection between the beam section top plate and the beam section. Avoid stress concentration; use ZG340-550H overall casting to optimize force transmission and local stress.
The structural design is simplified, local stress is optimized, welding difficulty and residual stress are reduced, and construction quality and convenience are improved.
Smart Images
Figure CN222477197U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge engineering, in particular to an arch foot node of a tied-rod arch bridge. Background Art
[0002] In the design process of tied arch bridges, the design of beam-arch nodes is very important. The bearings, arch ribs and tie beams meet here. The nodes are subjected to complex forces and are key components for transmitting and distributing internal forces in the entire structural system. Among the large components at this stage, the arch foot nodes are mostly assembled and welded by plates. The plates at the arch foot nodes often have complex geometric shapes, including curved surfaces, inclinations, etc., which requires the welding process to be able to adapt to plates of different angles and shapes. In addition, the plates are usually thick and numerous, requiring multiple passes of welding or complex multi-layer welding processes, which increases the complexity of welding. At the same time, due to the small space at the arch foot nodes, welding operations are limited and inconvenient to operate, which further increases the difficulty of welding.
[0003] During the welding process, the plates are subjected to heat input, and plates of different thicknesses and shapes will cause different degrees of thermal deformation, thereby generating residual stress. In addition, if plates of different materials are used in the arch foot node, due to their different thermal expansion coefficients, different degrees of residual stress will be caused. In addition, the uneven heat input at the plate welding joint and the uneven shrinkage during the cooling process can easily lead to stress concentration in the weld area, further increasing the risk of residual stress. Thick plates and a large number of them make welding difficult, and the residual stress is high, which can easily cause welding defects. Utility Model Content
[0004] The utility model aims to provide a novel arch foot node of a tied arch bridge, which makes the structure bear force reasonably and has a simple structure, and improves the construction quality while facilitating the construction.
[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:
[0006] A tie-arch bridge arch foot node, characterized in that it comprises: an arch rib section, a tie beam section and a cross beam section, wherein the intersection of the arch rib section, the tie beam section and the cross beam section is solid casting with controllable quality, an arc transition plate is provided between the arch rib section and the tie beam section, the cross beam section comprises a top plate, a web plate and a bottom plate, the web plate is welded to the top plate and the bottom plate respectively, and a plurality of bearings are provided outside the tie beam section for reinforcement to disperse and support vertical stress.
[0007] Furthermore, the arch rib sections and tie beam sections are hollow except for the intersections.
[0008] Furthermore, a chamfer is added at the connection between the top plate and the tie beam section to avoid local stress concentration.
[0009] Furthermore, the arch rib section, tie beam section and cross beam section are integrally cast, and the components are integrally cast using ZG340-550H to optimize force transmission and ensure local force safety of the components.
[0010] Furthermore, the intersection of the arch rib section, the tie beam section and the cross beam section is a node solid section.
[0011] Furthermore, grooves are added to the ends of the welded connections of the arch rib sections, tie beam sections and cross beam sections to facilitate the transition of welding plate thickness.
[0012] The utility model has the following beneficial effects:
[0013] The arch rib section and tie beam section of the structure are hollow except for the intersection, which simplifies the structure. The intersection of the arch rib section, tie beam section and cross beam section adopts a solid section, and the outside of the tie beam section is set with support stiffeners according to the actual position of the end cross beam section plate. These two measures make the stress caused by the support reaction force better diffused and optimize the local force. A circular arc transition plate is added at the connection between the tie beam section and the arch rib section, and a circular arc chamfer transition is adopted between the cross beam section top plate and the tie beam section to avoid local stress concentration. The arch rib section, tie beam section and cross beam section end plate are added with grooves for easy welding with other sections. The whole component is cast as a whole with ZG340-550H, which can avoid the problems of spatial positioning and welding of the plate to the greatest extent, reduce the residual stress caused by the welding deformation of the thick plate, and reduce the influence of the external climate environment on the component during the construction process. The utility model has a high promotion value in terms of construction quality control and construction convenience. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a three-dimensional schematic diagram of the inner side of a specific embodiment of the utility model.
[0015] Figure 2 It is a three-dimensional schematic diagram of the outer side of a specific embodiment of the utility model.
[0016] Figure 3 It is a plan view of a specific embodiment of the utility model.
[0017] Figure 4 It is the AA cross-sectional view of the utility model.
[0018] Numbers in the figure:
[0019] 1. Arch rib section; 2. Tie beam section; 3. Arc transition plate; 4. Top plate of beam section; 5. Web plate of beam section; 6. Bottom plate of beam section; 7. Support stiffening; 8. Solid section of node; 9. End groove. DETAILED DESCRIPTION
[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific examples. It should be noted that the drawings are in very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the present invention. The above is only a description of the preferred embodiment of the present invention, and is not any limitation to the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure are within the scope of protection of the claims.
[0021] like Figure 1-4 The arch foot of a certain tied arch bridge is integrally cast. The arch foot includes an arch rib section 1, a tie beam section 2, an arc transition plate 3, a cross beam section top plate 4, a cross beam section web plate 5, a cross beam section bottom plate 6, a support stiffener 7, a node solid section 8, and an end groove 9. The arch rib section 1 and the tie beam section 2 are hollow except for the intersection, and the two are connected by a node arc plate 3 to avoid stress concentration at the connection. The cross beam section web plate 5, the cross beam section top plate 4 and the cross beam section bottom plate 6 are combined into a cross beam section, and the cross beam section is connected to the arch rib section 1 and the tie beam section 2 as a whole. The connection between the cross beam section top plate 4 and the arch rib section 1 and the tie beam section 2 is chamfered to avoid stress concentration. The intersection of the arch rib section 1, the tie beam section 2 and the cross beam section is a node solid section 8 to optimize local force. Grooves 9 are added to the arch rib section 1, the tie beam section 2 and the end of the cross beam section. The support stiffener 7 is arranged accordingly according to the location of the cross beam section.
[0022] The utility model is characterized by: 1) adopting ZG340-550H for integral casting; 2) the arch rib section 1 and the tie beam section 2 are all hollow except at the intersection; 3) the intersection of the arch rib, tie beam and cross beam adopts a solid section; 4) a node arc plate is added between the arch rib section 1 and the tie beam section 2, and an arc chamfer transition is adopted at the connection between the cross beam section top plate 4 and the tie beam section 2 and the arch rib section 1; 4) a support stiffener 7 is arranged outside the tie beam section 2 according to the actual position of the cross beam section; 5) a groove 9 is added to the end of the arch rib section 1, the tie beam section 2 and the cross beam section for easy welding with other sections.
[0023] According to the finite element model calculation and analysis, the tie beam section and the arch rib section can be exempted from the internal reinforcement to meet the requirements, and the overall casting is used to avoid the problems of thick plate spatial positioning and welding to the greatest extent. Through the casting and welding process, the residual stress caused by the deformation of the thick plate welding is minimized to the greatest extent, reducing the impact of the external climate environment on the components during the construction process.
Claims
1. A tie arch bridge arch foot node, characterized in that: include: The arch rib section, the tie beam section and the cross beam section, the intersection of the arch rib section, the tie beam section and the cross beam section is solid casting, an arc transition plate is provided between the arch rib section and the tie beam section, the cross beam section includes a top plate, a web plate and a bottom plate, the web plate is welded to the top plate and the bottom plate respectively, and a plurality of supports are provided outside the tie beam section for reinforcement.
2. The arch foot node of the tied arch bridge according to claim 1, characterized in that: The arch rib section and tie beam section are hollow except for the intersections.
3. The arch foot node of the tied arch bridge according to claim 1, characterized in that: A chamfer is added at the connection between the top plate and the tie beam section.
4. The arch foot node of the tied arch bridge according to claim 1, characterized in that: The arch rib section, tie beam section and cross beam section are integrally cast.
5. The arch foot node of the tied arch bridge according to claim 1, characterized in that: The intersection of the arch rib section, the tie beam section and the cross beam section is a node solid section.
6. The arch foot node of the tied arch bridge according to claim 1, characterized in that: Bevels are added to the ends of the welded connections of the arch rib sections, tie beam sections and cross beam sections.