CN114922043A - Box girder and box girder bridge - Google Patents
Box girder and box girder bridge Download PDFInfo
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- CN114922043A CN114922043A CN202210591502.0A CN202210591502A CN114922043A CN 114922043 A CN114922043 A CN 114922043A CN 202210591502 A CN202210591502 A CN 202210591502A CN 114922043 A CN114922043 A CN 114922043A
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- concrete
- steel
- box girder
- steel pipe
- chord
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- 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
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- 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
- E01D2101/268—Composite concrete-metal
Abstract
The application discloses box girder and box girder bridge. The box girder comprises a concrete top plate, at least one corrugated steel web plate, at least one steel pipe concrete main chord and at least one steel pipe supporting chord; one end of the corrugated steel web plate is fixedly connected with the steel pipe concrete main chord, the other end of the corrugated steel web plate is fixedly connected with the concrete top plate, and two ends of the steel pipe support chord are fixedly connected with the steel pipe concrete main chord to form a structural framework; the steel tube concrete main chord member is configured to comprise a steel tube and a lining concrete body filled in the steel tube. In the technical scheme, the steel tube concrete main chords are adopted to replace the bottom plate, and the steel tube supporting chords are fixedly connected between the steel tube concrete main chords, so that the defect of insufficient stress strength of the bottom structure can be overcome, the integrity and the stability of the structure are enhanced, the bending resistance and the torsional rigidity of the structure are improved, and the shear hysteresis effect of the composite beam is weakened.
Description
Technical Field
The application relates to the technical field of bridge engineering, in particular to a box girder and a box girder bridge.
Background
Compared with a common PC box girder bridge, the corrugated steel web PC combined box girder bridge not only reduces the dead weight of a main girder, improves the construction performance, but also improves the prestress efficiency and reduces the construction cost.
However, in the related art, when the corrugated steel web plates are used for pouring the concrete bottom plate, a scaffold supporting template needs to be erected, the difficulty of site construction is high, and meanwhile, the pouring space of the joint parts of the web plates and the bottom plate is limited, so that the pouring quality of the concrete is difficult to ensure; in addition, under the action of positive bending moment, the concrete bottom plate is easy to crack prematurely, the structural rigidity and the bearing capacity are reduced, and the structural durability is influenced.
Disclosure of Invention
In view of this, this application provides box girder and box girder bridge, can improve bearing strength and stability.
In a first aspect, the present application provides a box girder comprising a concrete top slab, at least one corrugated steel web, at least one concrete-filled steel tube main chord, and at least one steel tube support chord; one end of the corrugated steel web plate is fixedly connected with the concrete filled steel tube main string, the other end of the corrugated steel web plate is fixedly connected with the concrete top plate, and two ends of the steel tube support chord are fixedly connected with the concrete filled steel tube main string to form a structural framework; wherein the main chord is configured to include a steel pipe and a lining concrete body filled in the steel pipe.
Optionally, the concrete filled steel tube main chord further comprises prestressed steel strands disposed within the inner liner concrete body.
Optionally, the steel pipe concrete main chord member comprises a PBL shear connector used for connecting the concrete top plate to the end of the corrugated steel web plate far away from the steel pipe concrete main chord member.
Optionally, a cross brace is further included to support the structural framework.
Optionally, the steel tube is a rectangular tube.
In a second aspect, the present application provides a box girder bridge for use as the box girder described above.
According to the box girder and the box girder bridge, the steel pipe concrete main chords are adopted to replace the bottom plate, and the steel pipe support chords are fixedly connected among the steel pipe concrete main chords, so that the defect that the stress strength of the bottom structure is insufficient can be overcome, the integrity and the stability of the structure are enhanced, the bending resistance and the torsional rigidity of the structure are improved, and the shear hysteresis effect of the composite girder is weakened.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a side view schematic structure diagram of a box girder according to an embodiment of the present application.
Fig. 2 is a schematic perspective structure view of a box girder according to an embodiment of the present application.
Fig. 3 is a schematic top view of a box girder according to an embodiment of the present application.
Fig. 4 is a schematic view of a connection mode of a corrugated steel web and a concrete top plate according to an embodiment of the present application.
Fig. 5 is a schematic view of a welding manner of a corrugated steel web and a concrete filled steel tube main chord provided by an embodiment of the application.
Wherein the elements in the figures are identified as follows:
1-concrete top plate; 2-corrugated steel webs; 3-a steel pipe concrete main chord; 4-supporting the chord member by the steel tube; 5-PBL shear connectors; 6-horizontal bracing; 7-double fillet weld; 11-concrete; 12-prestressed reinforcement; 31-a steel tube; 32-lining concrete body; 33-prestressed steel bundles; 41-horizontal steel pipe supporting chords; 42-inclined steel pipe support chords; 51-apertured end plates; 52-bolt connection; 61-vertical square steel tube; 62-transverse square steel tube; 63-oblique square steel tube.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implying that the number of indicated technical features is indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; may be mechanically, electrically or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The following disclosure provides many different embodiments or examples for implementing different features of the application. To simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
Before describing the technical solution of the present application, it is necessary to explain the following background of the invention of the present application.
In the related technology, a scaffold supporting template needs to be erected when the corrugated steel web 2 is used for pouring a concrete 11 bottom plate, so that the difficulty of site construction is high, and the pouring space of the joint of the web and the bottom plate is limited, so that the pouring quality of the concrete 11 is difficult to ensure; in addition, under the action of positive bending moment, the bottom plate of the concrete 11 is easy to crack prematurely, the structural rigidity and the bearing capacity are reduced, and the structural durability is influenced.
Based on the above problems, the inventor proposes a box girder and a box girder bridge, and the steel pipe concrete main chords 3 are adopted to replace the bottom plate, and the steel pipe support chords 4 are fixedly connected between the steel pipe concrete main chords 3, so that the defect of insufficient stress strength of the bottom structure can be overcome, the integrity and the stability of the structure are enhanced, the bending resistance and the torsional rigidity of the structure are improved, and the shear hysteresis effect of the composite girder is weakened. Therefore, the invention is created.
Referring to fig. 1, 2 and 3, the present embodiment provides a box girder, including a concrete 11 top plate 1, at least one corrugated steel web 2, at least one concrete filled steel tube main chord 3 and at least one steel tube support chord 4; one end of the corrugated steel web plate 2 is fixedly connected with the steel pipe concrete 11 main string, the other end of the corrugated steel web plate is fixedly connected with the concrete 11 top plate 1, and the two ends of the steel pipe support chord 4 are fixedly connected with the steel pipe concrete 11 main string to form a structural framework; the main chord 3 is configured to include a steel pipe and a lining concrete body 32 filled in the steel pipe.
The number of the corrugated steel webs 2 may be two as shown in fig. 1, and the number of the steel pipe support chords 4 may be four as shown in fig. 1. Thus, the structural framework formed by the concrete 11 top plate 1, the corrugated steel web 2, the steel pipe support chords 4, and the steel pipe concrete main chords 3 can be in a square frame shape.
The fixing method of the steel pipe concrete main chord 3 and the corrugated steel web 2 includes, but is not limited to, fillet welding. Referring to fig. 5, the corrugated steel web 2 is connected to the main chord 3 of the steel pipe concrete by using a double fillet weld 7.
The fixing method of the steel pipe support chord 4 and the steel pipe concrete main chord 3 includes, but is not limited to, fillet welding.
As an exemplary implementation of the construction of the steel pipe support chord 4, it includes a horizontal steel pipe support chord 41 fixedly attached to the steel pipe concrete main chord 3, and an inclined steel pipe support chord 42.
Therefore, the horizontal steel pipe support chord 41 and the inclined steel pipe support chord 42 are adopted to form a truss structure together with the steel pipe concrete main chord 3, so that the torsion resistance and the stability of the lower structure of the composite beam can be enhanced.
As shown in fig. 2, the horizontal steel pipe support chord 42414 and the inclined steel pipe support chord 4 may be arranged in a "K" shape (K-shaped square steel pipe) with the concrete filled steel pipe main chord 3.
As an exemplary implementation of the construction of the corrugated steel web 2, it comprises a straight plate section and an inclined plate section.
The construction of the main chord of the concrete filled tube 11 has been described above, and includes a steel tube and a lining concrete body 32 filled in the steel tube. In addition, the concrete filled steel tube main chord 3 further includes a prestressed steel strand 33 disposed in the lining concrete body 32.
Therefore, the area of the section of the steel pipe can be reduced by arranging the prestressed steel bundles 33, so that the mechanical property of the concrete 11 in the steel pipe is more outstanding, and the structural appearance is improved and more attractive.
Here, the steel pipe constituting the concrete filled steel pipe main chord 3 may be a rectangular pipe. The steel pipe material of the steel pipe concrete main chord 3 can adopt new materials such as weathering steel and the like to solve the corrosion prevention problem of the steel structure bridge.
The design considerations for using rectangular tubes are: in the actual construction process, the welding between the steel pipe concrete 11 chord member and the corrugated steel web 2 and between the steel pipe support chord members 4 is a big difficulty in the construction. If the surface of the steel pipe concrete 11 chord member is a curved surface, spatial three-dimensional curved surface welding is needed, and automatic welding cannot be realized. The curved surface welding has high construction difficulty and is easy to generate deformation of welding heat effect. And the design of rectangular pipe, the construction of the weldment work of being convenient for, welding quality is better, and the construction is more convenient.
Similarly, for the aforementioned horizontal steel pipe support chord 41 and the inclined steel pipe support chord 4, which constitute part of the steel pipe, a square pipe may be used, considering the welding operation.
An exemplary implementation for a concrete roof construction includes concrete 11 and prestressed reinforcement 12, with prestressed reinforcement 12 being located within concrete 11. The arrangement of the prestressed reinforcements 12 can be selected according to actual needs.
The thickness of the joint of the concrete top plate 1 and the corrugated steel web plate 2 is larger than that of the middle top plate, so that the concrete 11 can be efficiently utilized, and the self weight of the structure is reduced.
The upper flange of the corrugated steel web 2 can be designed into an overhanging flange plate as a template so as to be convenient for pouring the bridge deck plate concrete 11 or adopting a spliced bridge deck plate.
In an exemplary embodiment, the box girder according to the embodiment of the present invention further includes PBL shear connectors 5 for connecting the top slab 1 of the concrete 11 to the end of the corrugated steel web 2 away from the concrete filled steel main chords 3.
Referring to fig. 4, as an exemplary implementation of the PBL shear connector 5 herein, it comprises a holed end plate 51 and a bolt connector 52, the bolt connector 52 being used to penetrate the holed end plate 51.
In an exemplary embodiment, a cross brace 6 is included to support the structural framework.
As an exemplary implementation of the structure of the wale 6, a vertical square steel pipe 61, a horizontal square steel pipe 62, and an oblique square steel pipe 63 are included, which are fixedly connected in this order.
The vertical square steel tubes 61 and the K-shaped square steel tubes are arranged at certain intervals, the vertical square steel tubes 61 are arranged on the chord members of the rectangular concrete filled steel tubes 11 and are connected with the K-shaped square steel tubes to form the cross braces 6, so that the overall torsion resistance of the composite beam can be enhanced, and the corrugated steel web 2 is not easy to buckle.
The above description is only for the preferred embodiment, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present invention.
Claims (6)
1. A box girder is characterized by comprising a concrete top plate, at least one corrugated steel web plate, at least one steel pipe concrete main chord member and at least one steel pipe supporting chord member; one end of the corrugated steel web plate is fixedly connected with the concrete filled steel tube main string, the other end of the corrugated steel web plate is fixedly connected with the concrete top plate, and two ends of the steel tube support chord are fixedly connected with the concrete filled steel tube main string to form a structural framework; wherein the main chord is configured to include a steel pipe and a lining concrete body filled in the steel pipe.
2. The box girder of claim 1, wherein the concrete filled steel tube main chord further comprises prestressed steel strands disposed within the lined concrete body.
3. The box girder of claim 1, further comprising PBL shear connectors to connect the concrete top slab to the end of the corrugated steel web remote from the concrete filled steel main chords.
4. The box girder of claim 1, further comprising a wale to support the structural framework.
5. The box girder of claim 1, wherein the steel pipes are rectangular pipes.
6. A box girder bridge, comprising the box girder of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210591502.0A CN114922043A (en) | 2022-05-27 | 2022-05-27 | Box girder and box girder bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210591502.0A CN114922043A (en) | 2022-05-27 | 2022-05-27 | Box girder and box girder bridge |
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| Publication Number | Publication Date |
|---|---|
| CN114922043A true CN114922043A (en) | 2022-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210591502.0A Pending CN114922043A (en) | 2022-05-27 | 2022-05-27 | Box girder and box girder bridge |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030037259A (en) * | 2002-04-25 | 2003-05-12 | 박대열 | Prestressed wave form box girder |
| CN101280546A (en) * | 2007-10-19 | 2008-10-08 | 清华大学 | Lower chord opening beam type corrugated steel web combination beam |
| CN103031926A (en) * | 2012-12-26 | 2013-04-10 | 东南大学 | Double T-shaped composite beam provided with prestressed steel tube concrete core rods and fabrication method of double T-shaped composite beam |
| CN202990244U (en) * | 2012-12-26 | 2013-06-12 | 东南大学 | Dual-T shaped composite beam with prestress concrete filled steel tube core bar |
| CN110067185A (en) * | 2019-06-05 | 2019-07-30 | 深圳市市政设计研究院有限公司 | A kind of steel pipe-steel plate combination web steel reinforced concrete combined box beam |
| CN110067186A (en) * | 2019-06-05 | 2019-07-30 | 深圳市市政设计研究院有限公司 | A kind of pipe stiffener web steel reinforced concrete combined box beam |
| CN210031457U (en) * | 2019-05-20 | 2020-02-07 | 福州大学 | Corrugated steel web-truss type chord UHPC combined box girder |
-
2022
- 2022-05-27 CN CN202210591502.0A patent/CN114922043A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030037259A (en) * | 2002-04-25 | 2003-05-12 | 박대열 | Prestressed wave form box girder |
| CN101280546A (en) * | 2007-10-19 | 2008-10-08 | 清华大学 | Lower chord opening beam type corrugated steel web combination beam |
| CN103031926A (en) * | 2012-12-26 | 2013-04-10 | 东南大学 | Double T-shaped composite beam provided with prestressed steel tube concrete core rods and fabrication method of double T-shaped composite beam |
| CN202990244U (en) * | 2012-12-26 | 2013-06-12 | 东南大学 | Dual-T shaped composite beam with prestress concrete filled steel tube core bar |
| CN210031457U (en) * | 2019-05-20 | 2020-02-07 | 福州大学 | Corrugated steel web-truss type chord UHPC combined box girder |
| CN110067185A (en) * | 2019-06-05 | 2019-07-30 | 深圳市市政设计研究院有限公司 | A kind of steel pipe-steel plate combination web steel reinforced concrete combined box beam |
| CN110067186A (en) * | 2019-06-05 | 2019-07-30 | 深圳市市政设计研究院有限公司 | A kind of pipe stiffener web steel reinforced concrete combined box beam |
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