Arc-shaped triangular ring steel truss footbridge

Abstract

The utility model discloses arc triangle ring steel truss footbridge, including bearing part, and bearing part is by the hollow arc box truss structure of several triangles, bearing part cross section is the Leluo triangle of three angles all being circular arc transition, including two lower chords, and a upper chord, two lower chords along length direction are distributed several one -to -one lower chord node, every pair of corresponding lower chord node between two lower chords is equipped with lower parallel, and is surrounded into several grid structures between two lower chords, every grid structure is equipped with the lower parallel of cross -shaped and four inner angles are connected, and upper chord node is equipped with on the upper chord distance every two groups adjacent four lower chord nodes same position, and every upper chord node is connected through web member between four lower chord nodes of distance nearest and same distance. The utility model discloses satisfy the strength, rigidity and navigation requirement at the same time, reduce the thickness of bar piece to reduce the structure dead weight, and the foundation bearing is lightened.

Description

Technical Field

[0001] This utility model relates to the field of pedestrian bridge construction technology, and in particular to an arc-shaped triangular ring steel truss pedestrian bridge. Background Technology

[0002] According to bridge specifications, water conservancy specifications, and land planning requirements, newly built pedestrian bridges across rivers must be smoothly connected to the riverside walkways on both sides of the bridgehead to meet the requirements of pedestrians crossing the river and connecting the two banks. When building a new bridge in a river with navigation requirements, it must also meet the clearance requirements for ships to navigate under the bridge. In addition, pedestrian bridges must also meet the requirements of economy, safety, stability, and durability.

[0003] To meet the requirements of strength, stiffness, and building height, existing traditional steel truss pedestrian bridges require large cross-sectional dimensions and thicknesses for their members, resulting in a large overall structural weight.

[0004] Therefore, how to reduce the thickness of members to lower the structural self-weight and reduce the foundation load while meeting the requirements of strength, stiffness and navigation, and how to ensure structural stiffness and improve crossing potential by optimizing the cross-sectional shape have become technical problems that urgently need to be solved by those skilled in the art. Utility Model Content

[0005] In view of the above-mentioned deficiencies of the prior art, this utility model provides an arc-shaped triangular ring steel truss pedestrian bridge. The purpose is to reduce the thickness of the members to reduce the self-weight of the structure and reduce the foundation load while meeting the requirements of strength, stiffness and navigation. The structural stiffness is ensured by optimizing the cross-sectional shape, and the span potential is improved.

[0006] To achieve the above objectives, this utility model discloses an arc-shaped triangular ring steel truss pedestrian bridge, including a load-bearing part, which is a hollow arc-shaped box truss structure composed of several triangles.

[0007] The load-bearing part is symmetrical about the central axis and the center line of the span of the bridge. Its cross-section is a Reuleaux triangle with rounded corners. It includes two parallel and arc-shaped lower chords and an upper chord that is parallel to the two lower chords and is arc-shaped.

[0008] The two lower chord members have several corresponding lower chord member nodes evenly distributed along their length.

[0009] Each pair of corresponding lower chord nodes on the two lower chords is provided with a lower parallel connection, forming several grid structures between the two lower chords;

[0010] Each of the aforementioned grid structures is provided with a cross-shaped lower parallel connection that connects to the four interior corners;

[0011] The upper chord is provided with upper chord nodes at positions equidistant from each of the four lower chord nodes in every two groups;

[0012] Each of the upper chord nodes is connected to the four lower chord nodes that are closest to it and at the same distance through a web member.

[0013] Preferably, a bridge deck system is provided on all the lower parallel sections of the two lower chords.

[0014] Preferably, the upper chord, all upper chord nodes, all lower chords, all lower chord nodes, all web members, all lower parallel members, and the bridge deck system are all steel structures.

[0015] Preferably, the lower parallel sections at both ends of the bearing portion are all supported on the end abutments by spherical bearings, and the lower parallel sections at the middle of the span are all supported on the piers and abutments by V-shaped piers.

[0016] More preferably, each of the end abutments and each of the piers is provided with a number of pile foundations.

[0017] More preferably, each of the V-shaped piers is a steel-concrete composite structure; each of the end abutments, each of the piers and abutments, and each of the pile foundations are reinforced concrete structures.

[0018] The beneficial effects of this utility model are:

[0019] This invention, while meeting traffic and navigation requirements, employs a combination of triangular and circular truss arrangements to significantly improve structural stiffness and stability. This reduces the cross-sectional dimensions and thickness of the members, lowers the structural self-weight, and lessens the foundation load. The reduced structural self-weight decreases inertial forces, improving seismic performance, and the curved cross-section reduces wind resistance. Combined with the truss's permeability, it suppresses vortex-induced vibrations.

[0020] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0021] Figure 1 A schematic diagram of an embodiment of the present invention is shown.

[0022] Figure 2 The diagram shows a structural schematic of the support portion in one embodiment of the present invention.

[0023] Figure 3 This diagram illustrates a structure in one embodiment of the present invention, in which several lower parallel bearing portions are located at both ends and supported by spherical supports on the end abutments.

[0024] Figure 4This diagram illustrates a structure in one embodiment of the present invention, showing a plurality of parallel lower supports located at the mid-span of the span, which are supported by V-shaped piers on the bridge piers and abutments. Detailed Implementation

[0025] Example

[0026] like Figures 1 to 4 As shown, the arc-shaped triangular ring steel truss pedestrian bridge includes a load-bearing section, which is a hollow arc-shaped box truss structure composed of several triangles.

[0027] The load-bearing part is symmetrical about the central axis and the center line of the span of the bridge. The cross-section is a Reuleaux triangle with rounded corners. It includes two parallel and arc-shaped lower chord members 4 and an upper chord member 2 that is parallel to both lower chord members 4 and arc-shaped.

[0028] Two lower chord members 4 are evenly distributed along their length with several corresponding lower chord member nodes 3;

[0029] A lower parallel connection 6 is provided between each pair of corresponding lower chord nodes 3 on the two lower chords 4, forming several grid structures between the two lower chords 4;

[0030] Each grid structure contains a cross-shaped lower parallel 6 that connects to the four interior corners;

[0031] Upper chord node 1 is provided at a position equidistant from each of the four adjacent lower chord node nodes 3 in every two groups;

[0032] Each upper chord node 1 is connected to the four lower chord nodes 3 that are closest to it and at the same distance through a web member 5.

[0033] The longitudinal section of the load-bearing part of this invention adopts the form of a triangular truss, and the cross section adopts a combination of triangles and rings, which significantly improves the structural stiffness and stability, thereby reducing the cross-sectional size and thickness of the members.

[0034] In some embodiments, a bridge deck system 7 is provided on all the lower parallel links 6 of the two lower chords 4.

[0035] In some embodiments, the upper chord 2, all upper chord nodes 1, all lower chords 4, all lower chord nodes 3, all web members 5, all lower parallel members 6, and the bridge deck system 7 are all steel structures.

[0036] In some embodiments, the lower parallel sections 6 located at both ends of the load-bearing section are all supported on the end abutments 10 by spherical supports 8, and the lower parallel sections 6 located in the middle of the span are all supported on the piers and abutments 11 by V-shaped piers 9.

[0037] In some embodiments, each end abutment 10 and each pier abutment 11 is provided with a plurality of pile foundations 12.

[0038] In some embodiments, each V-shaped pier 9 is a steel-concrete composite structure; each end abutment 10, each pier abutment 11, and each pile foundation 12 are reinforced concrete structures.

[0039] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An arc-shaped triangular ring steel truss pedestrian bridge, including a load-bearing section; characterized in that, The supporting part is a hollow arc-shaped box truss structure composed of several triangles; The load-bearing part is symmetrical about the central axis and the center line of the span of the bridge. Its cross-section is a Reuleaux triangle with rounded corners. It includes two parallel and arc-shaped lower chords (4) and an arc-shaped upper chord (2) that is parallel to the two lower chords (4). The two lower chord members (4) are evenly distributed with several corresponding lower chord member nodes (3) along the length direction; A lower parallel connection (6) is provided between each pair of corresponding lower chord nodes (3) on the two lower chords (4), forming several grid structures between the two lower chords (4); Each of the aforementioned grid structures is provided with a cross-shaped lower parallel (6) that connects to the four interior corners. The upper chord (2) is provided with upper chord nodes (1) at the same distance from each of the four lower chord nodes (3) of every two groups of adjacent lower chord nodes (3). Each of the upper chord nodes (1) is connected to the four lower chord nodes (3) that are closest to it and at the same distance through a web member (5).

2. The arc-shaped triangular ring steel truss pedestrian bridge according to claim 1, characterized in that, Bridge deck system (7) is provided on all the lower parallel (6) of the two lower chords (4).

3. The arc-shaped triangular ring steel truss pedestrian bridge according to claim 2, characterized in that, The upper chord (2), all upper chord nodes (1), all lower chords (4), all lower chord nodes (3), all web members (5), all lower parallel members (6), and the bridge deck system (7) are all steel structures.

4. The arc-shaped triangular ring steel truss pedestrian bridge according to claim 1, characterized in that, The lower parallel (6) at both ends of the bearing section is supported on the end abutment (10) by spherical bearings (8), and the lower parallel (6) at the middle of the span is supported on the pier abutment (11) by V-shaped piers (9).

5. The arc-shaped triangular ring steel truss pedestrian bridge according to claim 4, characterized in that, Each of the end abutments (10) and each of the pier abutments (11) is provided with a number of pile foundations (12).

6. The arc-shaped triangular ring steel truss pedestrian bridge according to claim 5, characterized in that, Each of the V-shaped piers (9) is a steel-concrete composite structure; each of the end abutments (10), each of the pier abutments (11) and each of the pile foundations (12) are reinforced concrete structures.

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