CN112832116A - Plate-truss combined main beam suitable for large-span cable-stayed bridge in mountainous area - Google Patents
Plate-truss combined main beam suitable for large-span cable-stayed bridge in mountainous area Download PDFInfo
- Publication number
- CN112832116A CN112832116A CN202110166174.5A CN202110166174A CN112832116A CN 112832116 A CN112832116 A CN 112832116A CN 202110166174 A CN202110166174 A CN 202110166174A CN 112832116 A CN112832116 A CN 112832116A
- Authority
- CN
- China
- Prior art keywords
- steel
- bridge
- bottom plate
- bridge deck
- upper chord
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D6/00—Truss-type bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The utility model provides a be fit for mountain area stride cable-stay bridge's board purlin combination girder to effectively improve the efficiency of construction, overcome the easy technological problem who ftractures of steel bridge deck system bridge deck pavement, avoid the fatigue problem of traditional steel bridge panel moreover. The main girder is composed of a steel truss girder bridge deck structure, the bridge deck structure is a steel-concrete combined bridge deck plate composed of a steel bottom plate and cast-in-place steel fiber concrete, the steel bottom plate is arranged between an adjacent cross beam, an adjacent longitudinal beam, an upper chord of the main truss and the adjacent longitudinal beam, bearings are arranged at the welding connection positions of the steel bottom plate and the upper chord of the main truss, the longitudinal beam and the cross beam, and the cast-in-place steel fiber concrete is connected with the steel bottom plate, the upper chord of the main truss, the longitudinal beam and the cross beam into a whole through shear keys.
Description
Technical Field
The invention relates to bridge engineering, in particular to a plate girder combined main beam suitable for a large-span cable-stayed bridge in a mountainous area.
Background
When the cable-stayed bridge with the ultra-large span is built in a mountain area, a steel main beam is generally selected due to the structural stress requirement. Considering that the traffic and transportation conditions in mountainous areas lag behind and the transportation of large sections is difficult, the main beam is mostly in a steel truss beam form. The bridge deck is made of orthogonal deformed steel bridge deck or precast concrete bridge deck. The orthotropic bridge deck has high requirements on processing and manufacturing processes, fatigue cracks are easy to appear, the combination with bridge deck pavement is poor, and the bridge deck pavement is easy to cause diseases in the operation period. The prefabricated bridge deck is hoisted after being prefabricated, and finally is connected into an integral bridge deck through cast-in-place wet joints, so that the construction procedures are multiple, the requirements on the prefabrication and installation precision are high, the integrity is poor, and the joints after being poured are easy to crack.
Disclosure of Invention
The invention aims to provide a plate girder and truss combined main beam suitable for a large-span cable-stayed bridge in a mountainous area, so that the construction efficiency is effectively improved, the technical problem that a steel bridge deck system is easy to crack in bridge deck pavement is solved, and the fatigue problem of a traditional steel bridge deck is avoided.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention relates to a plate girder combined main beam suitable for a large-span cable-stayed bridge in a mountainous area, which is formed by a steel girder bridge deck structure and is characterized in that: the bridge deck structure is a steel-concrete combined bridge deck plate composed of a steel bottom plate and cast-in-place steel fiber concrete, the steel bottom plate is arranged between adjacent cross beams, adjacent longitudinal beams, an upper chord of a main truss and the adjacent longitudinal beams, bearings are arranged at the welding joints of the steel bottom plate and the upper chord of the main truss, the longitudinal beams and the cross beams, and the cast-in-place steel fiber concrete is connected with the steel bottom plate, the upper chord of the main truss, the longitudinal beams and the cross beams into a whole through shear keys.
The invention has the advantages that the steel-concrete plate girder combined main girder structure is adopted to thoroughly solve the fatigue problem of the steel bridge deck and the problem of poor pavement and bonding of the steel bridge deck, thereby effectively preventing the steel bridge deck from cracking and pavement damage; compared with the traditional composite beam adopting the precast concrete deck slab, the steel-concrete plate girder composite main beam takes the steel bottom plate as a construction template, and the cast-in-place steel fiber concrete forms a whole, so that the construction efficiency is improved, and the defects of high construction precision requirement and complex process of the precast deck slab are overcome; the main beam is an ideal main beam form for the large-span cable-stayed bridge in the mountainous area under the construction conditions of narrow construction site and difficult transportation of large sections.
Drawings
The specification includes the following five figures:
FIG. 1 is a cross-sectional view of a plate girder combined main beam suitable for a large-span cable-stayed bridge in a mountainous area;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic structural diagram (between cross beams) of a bridge deck in a plate girder combined main beam suitable for a large-span cable-stayed bridge in a mountainous area;
fig. 4 is a schematic structural view (on a cross beam) of a bridge deck in a plate-truss combined main beam suitable for a large-span cable-stayed bridge in a mountainous area.
Fig. 5 is a sectional view taken along line B-B in fig. 4.
The component names and corresponding labels are shown in the figure: the main truss comprises main truss upper chords 11, longitudinal girders 12, cross girders 13, a steel bottom plate 21, cast-in-place steel fiber concrete 22, PBL shear keys 23 and stud shear keys 24.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Referring to fig. 1 to 5, the plate girder combined main girder suitable for the large-span cable-stayed bridge in the mountainous area comprises a steel girder and a bridge deck structure, wherein the upper part of the steel girder comprises a main girder upper chord 11, longitudinal girders 12 arranged at intervals in the transverse bridge direction and transverse girders 13 arranged at intervals in the bridge direction. Referring to fig. 1 and 2, the bridge deck structure is a steel-concrete combined bridge deck plate formed by a steel bottom plate 21 and cast-in-place steel fiber concrete 22, the steel bottom plate 21 is arranged between adjacent cross beams 13, adjacent longitudinal beams 12, a main truss upper chord 11 and adjacent longitudinal beams 12, supports are arranged at the welding joints of the steel bottom plate 21 and the main truss upper chord 11, the longitudinal beams 12 and the cross beams 13, and the cast-in-place steel fiber concrete 22 is connected with the steel bottom plate 21, the main truss upper chord 11, the longitudinal beams 12 and the cross beams 13 into a whole through shear keys.
The invention designs the bridge deck into a combined structure of the steel bottom plate and the concrete bridge deck, and combines the steel bottom plate and the concrete bridge deck with the main truss girder through the shear keys to form a plate truss combination system, and the plate truss combination system is stressed together, thereby not only overcoming the problem that the bridge deck pavement of the steel bridge deck system is easy to crack, but also avoiding the fatigue problem of the traditional steel bridge deck. During construction, the bridge deck steel bottom plate and the steel truss girder segments are assembled together, after the bridge deck steel bottom plate and the steel truss girder segments are installed in place, the steel bottom plate is used as a steel fiber concrete pouring template, and a combined beam integral bridge floor is formed after the steel fiber concrete is poured, so that the structural form of the traditional precast concrete slab is simplified, the integrity is good, the construction is rapid, and the difficult problems that the construction site is narrow and small and the precast site is difficult to lay under the condition of a mountain area are solved.
Referring to fig. 3 to 5, the shear key comprises PBL shear keys 23 arranged on the steel bottom plate 21 at intervals in the transverse bridge direction, and the PBL shear keys 23 extend along the bridge direction and are welded with the steel bottom plate 21. The shear key further comprises stud shear keys 24 which are arranged at intervals in the outer bearing transverse bridge direction and the bridge direction, and the stud shear keys 24 are welded with the upper chord 11, the longitudinal beam 12 or the cross beam 13 of the main truss.
The above description is only used to illustrate some principles of the plate girder combined main girder of the cable-stayed bridge suitable for mountain spans, and the present invention is not limited to the specific structure and the application range shown and described, so all the corresponding modifications and equivalents that may be utilized belong to the patent scope of the present invention.
Claims (3)
1. The utility model provides a be fit for mountain area stride cable-stay bridge's board purlin combination girder, the girder comprises steel longeron and bridge floor structure, and the upper portion of steel longeron includes main truss upper chord member (11), horizontal bridge to longeron (12) that the interval set up and crossbeam (13) that the bridge set up to the interval in the same direction, characterized by: the bridge deck structure is a steel-concrete combined bridge deck plate composed of a steel bottom plate (21) and cast-in-place steel fiber concrete (22), the steel bottom plate (21) is arranged between an adjacent cross beam (13), an adjacent longitudinal beam (12), a main truss upper chord (11) and the adjacent longitudinal beam (12), bearings are arranged at the welding connection positions of the steel bottom plate (21) and the main truss upper chord (11), the longitudinal beam (12) and the cross beam (13), and the cast-in-place steel fiber concrete (22) is connected with the steel bottom plate (21), the main truss upper chord (11), the longitudinal beam (12) and the cross beam (13) into a whole through shear keys.
2. The plate-truss combined main beam suitable for the large-span cable-stayed bridge in the mountainous area as claimed in claim 1, which is characterized in that: the shear keys comprise PBL shear keys (23) which are arranged on the surface of the steel bottom plate (21) at intervals in the transverse bridge direction, and the PBL shear keys (23) extend along the bridge direction and are welded with the steel bottom plate (21).
3. The plate-truss combined main beam suitable for the large-span cable-stayed bridge in the mountainous area as claimed in claim 2, which is characterized in that: the shear key also comprises stud shear keys (24) which are arranged at intervals in the outer bearing transverse bridge direction and the bridge direction, and the stud shear keys (24) are welded with the upper chord (11), the longitudinal beam (12) or the cross beam (13) of the main truss.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110166174.5A CN112832116A (en) | 2021-02-07 | 2021-02-07 | Plate-truss combined main beam suitable for large-span cable-stayed bridge in mountainous area |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110166174.5A CN112832116A (en) | 2021-02-07 | 2021-02-07 | Plate-truss combined main beam suitable for large-span cable-stayed bridge in mountainous area |
Publications (1)
Publication Number | Publication Date |
---|---|
CN112832116A true CN112832116A (en) | 2021-05-25 |
Family
ID=75932471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202110166174.5A Pending CN112832116A (en) | 2021-02-07 | 2021-02-07 | Plate-truss combined main beam suitable for large-span cable-stayed bridge in mountainous area |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN112832116A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113722794A (en) * | 2021-08-16 | 2021-11-30 | 中交第二航务工程局有限公司 | Finite element simulation method for orthotropic steel bridge deck slab-truss combined structure |
-
2021
- 2021-02-07 CN CN202110166174.5A patent/CN112832116A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113722794A (en) * | 2021-08-16 | 2021-11-30 | 中交第二航务工程局有限公司 | Finite element simulation method for orthotropic steel bridge deck slab-truss combined structure |
CN113722794B (en) * | 2021-08-16 | 2023-09-19 | 中交第二航务工程局有限公司 | Finite element simulation method for orthotropic steel bridge deck truss combined structure |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN105002816B (en) | The fish belly I shape prestressing force steel reinforced concrete composite continuous bridge of precast assembly and construction method | |
CN109958049B (en) | Modular steel-concrete combined small box girder simply-supported continuous bridge and construction method thereof | |
CN108914778B (en) | Method for applying pre-pressing force to concrete slab of upper flange of composite beam | |
CN110700103B (en) | Construction method of continuous composite beam | |
CN109112961B (en) | Ultrathin bridge deck structure, truss bridge and construction method of truss bridge | |
CN111962372A (en) | Road-rail combined construction steel web member double-combination continuous truss girder and construction method thereof | |
CN105064196A (en) | Prefabricated and assembled fish-belly I-shaped prestressed steel-concrete composite simple supported girder bridge and construction method thereof | |
CN110331664B (en) | Steel-concrete mixed continuous box girder bridge deck joint structure and construction method thereof | |
CN216339028U (en) | Bridge deck longitudinal joint of pi-shaped prefabricated steel-UHPC composite beam | |
CN110331649B (en) | Transverse joint system for prefabricated steel-concrete composite beam | |
CN112832116A (en) | Plate-truss combined main beam suitable for large-span cable-stayed bridge in mountainous area | |
CN109958050B (en) | Improved light modular steel-concrete combined small box girder simply-supported bridge | |
CN111778835A (en) | Combined beam of steel, common concrete and ultrahigh-performance concrete and construction method | |
CN214613536U (en) | Plate-truss combined main beam suitable for large-span cable-stayed bridge in mountainous area | |
CN217974039U (en) | Bridge deck structure | |
CN207812184U (en) | A kind of suspension type bottom plate opening combinations box standard trajectory girder system system | |
CN116005548A (en) | Segmental prefabricated assembled steel concrete composite beam and construction method thereof | |
CN109356034A (en) | A kind of mixed composite continuous bridge superstructure system of vertically and horizontally Prestressed CFRP concrete steel | |
CN113073557B (en) | Method for mounting concrete bridge deck of steel-concrete combined continuous steel truss bridge | |
CN212582397U (en) | Combined beam of steel, common concrete and ultrahigh-performance concrete | |
WO2020134402A1 (en) | Structural steel, structural steel-uhpc composite slabs and bridge deck | |
CN111910517A (en) | Longitudinal bridge-direction joint connecting structure of UHPC short rib bridge deck and steel-UHPC combined bridge | |
CN220335680U (en) | Combined beam bridge | |
CN217869975U (en) | Pretensioned prestressing UHPC-superposed bridge deck composite beam | |
CN212270647U (en) | Joint connection structure of UHPC short rib bridge deck slab and steel-UHPC combined bridge |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination |