CN216663757U

CN216663757U - Bridge span structure of pedestrian bridge

Info

Publication number: CN216663757U
Application number: CN202122357868.5U
Authority: CN
Inventors: 黄卓驹; 项圣懿
Original assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Current assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-06-03
Anticipated expiration: 2031-09-28

Abstract

The utility model relates to a pedestrian bridge span structure which comprises beam string bridge parts, wherein box beam bridge parts are respectively connected and arranged at two ends of the beam string bridge parts and are connected with the ground, each beam string bridge part comprises a bridge floor, a main beam, a stay bar assembly and a cable assembly, the main beam is installed below the bridge floor and is connected with the stay bar assembly, and the stay bar assembly is connected with the cable assembly. Compared with the prior art, the system is light and has good stability, and can be well suitable for the situation that the basic geological condition cannot bear horizontal force; the bridge has the characteristics of clear structure force transfer, light and attractive shape, and can save materials and ensure wide visual field on the bridge.

Description

Bridge span structure of pedestrian bridge

Technical Field

The utility model relates to the technical field of bridge spans, in particular to a bridge span structure of a pedestrian bridge.

Background

The bridge generally comprises five major components and five widgets, and five major components are the bridge superstructure and the substructure of bridge bearing load, are bridge construction safety's assurance, include: bridge span structure (or called bridge hole structure or superstructure), support system, pier, abutment foundation.

The bridge span structure refers to a structure for crossing obstacles when a route is interrupted by the obstacles, and comprises bridge decks, bridge deck beams and structural members for supporting the bridge decks, such as girders, arches and suspension ropes, which are used for bearing pedestrians and vehicles on a bridge. The traditional bridge structure system mainly comprises: girder bridges, arch bridges, suspension bridges, rigid frame bridges, cable-stayed bridges, etc. In practice, for medium-sized span pedestrian bridges with the total length of less than one hundred meters, the bridge is expected to cross a river once in design due to navigation requirements so as to reduce the requirement of setting piers; meanwhile, due to the economic consideration, the structure also fully utilizes the advantages of materials as much as possible, reduces the dead weight, improves the span and saves the material consumption. Therefore, the arch bridge and the suspension bridge are common structures of the current pedestrian bridge, but both bridge structures need the foundation to bear larger horizontal force, so that the bridge structures cannot be applied to geological environments which cannot bear excessive horizontal force.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a bridge span structure of a pedestrian bridge, so as to realize a self-balancing structure system, reduce the horizontal force required to be borne by a foundation and ensure that the bridge can be suitable for environments with poor geological conditions.

The purpose of the utility model can be realized by the following technical scheme: the bridge span structure of the pedestrian bridge comprises beam string bridge parts, wherein box beam bridge parts are respectively connected and arranged at two ends of the beam string bridge parts, the box beam bridge parts are connected with the ground, the beam string bridge parts comprise a bridge deck, a main beam, a support rod assembly and a cable assembly, the main beam is installed below the bridge deck, the main beam is connected with the support rod assembly, and the support rod assembly is connected with the cable assembly.

Furthermore, one end of the box girder bridge part is connected with the main girder, and the other end of the box girder bridge part is connected with the ground bridge abutment.

Furthermore, the box girder bridge part is a variable cross section, the main body of the main girder is a special-shaped cross section, and the end part of the main girder is connected with the box girder bridge part and is designed to be the variable cross section.

Furthermore, the stay bar assembly comprises an inclined stay bar, a vertical stay bar and a partition plate, the partition plate is fixedly connected with the inclined stay bar and the main beam respectively, the vertical stay bar is connected and installed below the inclined stay bar, and the vertical stay bar is connected with the cable assembly.

Furthermore, the inclined stay bar is of a V-shaped structure, the partition plates are fixedly connected to the top ends of the two sides of the inclined stay bar, and the bottom end of the inclined stay bar is fixedly connected with the vertical stay bar.

Further, the cable assembly comprises a cable, and a plurality of cable clamps are sleeved on the cable.

Furthermore, the cable clamp is correspondingly and fixedly connected with the vertical support rod.

Furthermore, two ends of the inhaul cable are respectively connected with the box girder bridge.

Furthermore, both ends of the inhaul cable are connected with the box girder bridge part through the ear plates respectively.

Further, a stiffening rib is arranged in the box girder bridge part, and the stiffening rib is arranged at a position corresponding to the lug plate.

Compared with the prior art, the utility model adopts the beam string structure design, and the two ends of the beam string bridge part are respectively connected with the box girder bridge part, wherein the beam string bridge part is provided with a main beam below the bridge deck, and the main beam is sequentially connected with the stay bar component and the cable component to form a flexible cable component which is connected with the upper rigid structure by the rigid stay bar and tensioned at the lower part, thereby realizing a self-balancing system, greatly reducing the horizontal force required by the bridge foundation, being well suitable for the environment with poor geological conditions, simultaneously providing the box girder bridge part with the reverse bending function for the beam string bridge part, further ensuring the rigidity of the two ends of the beam string bridge part, and improving the safety of the bridge;

the inclined stay bar with the V-shaped structure is adopted in the stay bar component of the beam string bridge part, and the partition plates are arranged at the top ends of the two sides of the inclined stay bar, so that the stability of the two sides of the bridge deck pedestrian can be effectively improved;

in the beam-string bridge part structure, no structural stress component is arranged above the bridge floor, load is transmitted to the main beam through the bridge floor, then transmitted to the inclined strut and the vertical strut through the main beam partition plate, and finally upward supporting force is provided by the guy cable connected in series with the lower parts of the vertical struts and the box beam bridge parts at two ends.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic structural elevational view of the present invention;

FIG. 3 is a schematic cross-sectional view of the structure of the present invention;

FIG. 4 is a schematic top view of the structure of the present invention;

FIG. 5 is an exploded view of the present invention;

FIG. 6 is a diagram showing the deformation effect of the structure displacement in the embodiment;

the notation in the figure is: 1. a box girder bridge part; 2. a bridge deck; 3. a main beam; 4. a diagonal brace; 5. a vertical stay bar; 6. a partition plate; 7. a cable clamp; 8. a pull rope.

Detailed Description

The utility model is described in detail below with reference to the figures and the specific embodiments.

Examples

As shown in fig. 1 to 5, a pedestrian bridge span structure comprises a beam-string bridge part, wherein two ends of the beam-string bridge part are respectively connected with a box beam bridge part 1, the box beam bridge part 1 is connected with the ground, the beam-string bridge part comprises a bridge deck 2, a main beam 3, a stay bar component and a cable component, the main beam 3 is installed below the bridge deck 2, the main beam 3 is connected with the stay bar component, and the stay bar component is connected with the cable component.

One end of a box girder bridge part 1 is connected with a main girder 3, the other end of the box girder bridge part 1 is connected with a ground bridge abutment, the box girder bridge part 1 is of a variable cross section, a main body of the main girder 3 is of a special-shaped cross section, and the connection between the end part of the main girder 3 and the box girder bridge part 1 is designed to be of a variable cross section;

the stay bar assembly comprises an inclined stay bar 4, a vertical stay bar 5 and a partition plate 6, the partition plate 6 is respectively and fixedly connected with the inclined stay bar 4 and the main beam 3, the vertical stay bar 5 is connected and installed below the inclined stay bar 4, and the vertical stay bar 5 is connected with the cable assembly;

the cable subassembly includes cable 8, and cable 8 goes up the cover and establishes and install a plurality of cable clamp 7, and cable clamp 7 establishes ties cable 8 as an organic whole promptly, and cable clamp 7 corresponds fixed connection with vertical support rod 5, and the both ends of cable 8 are connected with box girder bridge portion 1 through the otic placode respectively, are provided with the stiffening rib in the box girder bridge portion 1, and the stiffening rib arranges in the position corresponding with the otic placode.

By adopting the technical scheme, the bridge span of the one-step traveling bridge is constructed, the total length of the bridge span is 51.2m, the main span is 40.3m, the main body is a light structural system, and the straight bridge is in a column-free layout. The bridge span is composed of a box girder bridge part 1 and a beam string bridge part, wherein the box girder bridge part 1 is arranged at two ends of the beam string bridge part and then is connected to the ground through the box girder bridge part 1; the box girder bridge part 1 is of a variable cross section; the beam string bridge part consists of a bridge deck 2, a main beam 3, a stay bar component and a cable component, wherein the main beam 3 is a special-shaped section, and the end part of the main beam is combined with the box beam bridge part 1 to be designed into a variable section; the stay bar component comprises an inclined stay bar 4, a vertical stay bar 5 and a partition plate 6, wherein the inclined stay bar 4 is V-shaped and is connected with the partition plate 6 and the vertical stay bar 5 up and down; the inclined stay bar 4 and the vertical stay bar 5 are designed into I-shaped variable cross sections according to the requirements of building beauty and stress; the partition plate 6 and the handrail are integrally designed, and the partition plate 6 is designed into a steel plate with a special-shaped cross section according to the arrangement consideration of the support rods; the cable assembly comprises a cable clamp 7 and a cable 8, and the cable clamp 7 is connected with the bottom of the vertical support rod 5; the bridge deck top all has no structural stress component, and the load passes power to girder 3 through

bridge deck

2, and 3 space bars 6 biography power of rethread girder reach diagonal brace 4 and erect vaulting pole 5, and the cable 8 that rises by erecting 5 lower parts series connection of vaulting pole provides ascending holding power with both ends case roof beam bridge portion 1 at last. The bridge span structure has good structural performance under the condition of meeting the requirement of functionality.

Fig. 6 shows the result of the correlation displacement analysis in this embodiment, and the analysis shows that the maximum displacement of the structure is shifted out of the existing bridge span, and all indexes of the structure can meet the standard requirements for safe use of design, and is economical and feasible.

In summary, the present invention has the following advantages:

(1) the dead weight is light, and the span is large;

(2) in the self-balancing system, the horizontal force at the base of the support is small, and the environment with poor geological conditions can also be suitable;

(3) the box girder bridge part provides a reverse bending function for the string structure, and simultaneously can ensure the rigidity of two ends of a main span string, and improve the safety and structural rationality of the bridge;

(4) the pedestrian bridge is different from a single vertical strut commonly used for a beam string system in a space structure, and the pedestrian bridge is provided with V-shaped diagonal struts, so that the stability of two sides of a bridge deck pedestrian is ensured, and the probability of instability is reduced;

(5) the structure has clear force transmission, gives full play to the stress characteristics of the rigid member and the flexible member, improves the use effectiveness of materials and saves the materials;

(7) the field of vision on the bridge is wide: the structural members are all arranged at the lower part of the bridge floor, and no structural stress member is arranged at the upper part of the bridge floor, so that the bridge has wider landscape and visual field;

(8) the partition board and the railing are integrally designed, so that the partition board and the railing are dual-purpose at a stroke, and can be used as a structural member and a building functional member.

Claims

1. The pedestrian bridge span structure is characterized by comprising a beam string bridge part, wherein two ends of the beam string bridge part are respectively provided with a box girder bridge part (1) in a connected mode, the box girder bridge part (1) is connected with the ground, the beam string bridge part comprises a bridge deck (2), a main beam (3), a stay bar assembly and a cable assembly, the main beam (3) is installed below the bridge deck (2), the main beam (3) is connected with the stay bar assembly, and the stay bar assembly is connected with the cable assembly.

2. A pedestrian bridge span structure according to claim 1, wherein one end of the box girder bridge portion (1) is connected to a main girder (3), and the other end of the box girder bridge portion (1) is connected to a ground abutment.

3. The pedestrian bridge spanning structure according to claim 2, wherein the box girder bridge part (1) has a variable cross section, the main body of the main beam (3) has a special-shaped cross section, and the end part of the main beam (3) is connected with the box girder bridge part (1) and designed to have a variable cross section.

4. The bridge span structure of the pedestrian bridge according to claim 1, wherein the strut assembly comprises an inclined strut (4), a vertical strut (5) and a partition plate (6), the partition plate (6) is fixedly connected with the inclined strut (4) and the main beam (3), the vertical strut (5) is connected and mounted below the inclined strut (4), and the vertical strut (5) is connected with the cable assembly.

5. The bridge span structure of the pedestrian bridge according to claim 4, wherein the diagonal braces (4) are V-shaped, the partition plates (6) are fixedly connected to the top ends of the two sides of the diagonal braces (4), and the bottom ends of the diagonal braces (4) are fixedly connected to the vertical braces (5).

6. The bridge span structure of a pedestrian bridge according to claim 4, wherein said cable assembly comprises a cable (8), and a plurality of cable clamps (7) are installed on said cable (8) in a sleeved manner.

7. A bridge span structure of a pedestrian bridge according to claim 6, wherein said cable clamps (7) are fixedly connected with the vertical stay bars (5) correspondingly.

8. A bridge span structure of a pedestrian bridge according to claim 6, wherein both ends of said stay cable (8) are connected to the box girder bridge (1), respectively.

9. A bridge span structure of pedestrian bridges according to claim 8, wherein both ends of said pulling cable (8) are connected to the box girder bridge (1) through ear plates, respectively.

10. A bridge span structure according to claim 9, wherein stiffening ribs are provided in the box girder bridge part (1), said stiffening ribs being arranged in positions corresponding to the ear plates.