CN110067185B - Steel pipe-steel plate combined web steel-concrete combined box girder - Google Patents
Steel pipe-steel plate combined web steel-concrete combined box girder Download PDFInfo
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- CN110067185B CN110067185B CN201910485177.8A CN201910485177A CN110067185B CN 110067185 B CN110067185 B CN 110067185B CN 201910485177 A CN201910485177 A CN 201910485177A CN 110067185 B CN110067185 B CN 110067185B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 229
- 239000010959 steel Substances 0.000 title claims abstract description 229
- 239000004567 concrete Substances 0.000 title claims abstract description 79
- 239000002131 composite material Substances 0.000 claims description 29
- 238000005452 bending Methods 0.000 claims description 5
- 238000000338 in vitro Methods 0.000 claims description 2
- 238000001727 in vivo Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract description 5
- 230000002277 temperature effect Effects 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000002435 tendon Anatomy 0.000 description 2
- 238000001035 drying Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
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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
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a steel pipe-steel plate combined web plate steel-concrete combined box girder, which relates to the technical field of bridge engineering and mainly comprises the following components: a concrete top plate, a concrete bottom plate, a diaphragm structure and a steel tube-steel plate combined web; the steel tube-steel plate combined web, the concrete top plate and the concrete bottom plate are connected to form a box girder main body, and the diaphragm structure is arranged at the two end fulcrums and the middle part of the box girder main body. The invention can lighten the dead weight of the bridge, increase the bridge crossing capacity, avoid web cracking, improve the prestress application efficiency, reduce the temperature effect and the secondary internal force caused by concrete shrinkage creep, fully exert the advantages of two materials of steel and concrete and have good economic benefit.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a steel pipe-steel plate combined web steel-concrete combined box girder.
Background
The concrete box girder is often used as a preferred structural form of a middle-span and large-span bridge because of high bending resistance and torsional rigidity. However, concrete box girder bridges are generally prone to two diseases: cracking of the web at the root (end) of the beam; the mid-span deflection continuously descends, and serious diseases appear in many large-span prestressed concrete girder bridges at home and abroad. The concrete box girder has larger self weight, larger bending moment and shearing force at the root of the box girder, and the web plate and the top and bottom plates are connected into a whole, so that the temperature difference of the top and bottom plates and the stress concentration problem caused by drying shrinkage, creep and the like of the web plate are more prominent, the web plate is cracked, and the bearing performance and durability of the structure are seriously affected.
In order to solve the two common problems of the concrete box girder, one scheme is to replace the concrete web by adopting a flat steel web, wherein the flat steel web has high shear strength and light weight, but the flat steel web has high longitudinal rigidity, so that the longitudinal prestress applied to the concrete structure can be lost, and longitudinal and transverse stiffening ribs are required to be welded to prevent buckling, so that materials are wasted and the structure is complex. The other scheme is that the corrugated steel plate is adopted to replace the concrete web, the outer rigidity of the corrugated steel plate is high, stiffening ribs are not required to be arranged, meanwhile, the longitudinal rigidity is low, the buckling effect is achieved, the prestress application efficiency is improved, but the corrugated steel web combined box girder is low in shear rigidity, large in shear deformation, complex in manufacturing and processing of the corrugated steel web, high in welding difficulty and high in cost, and special processing equipment is required, and the corrugated steel web is difficult to use in a large-span girder bridge.
Disclosure of Invention
The invention aims to provide a steel pipe-steel plate combined web steel-concrete combined box girder, which solves the problems in the prior art, can lighten the dead weight of a bridge, increase the spanning capacity of the bridge, avoid web cracking, improve the prestress application efficiency, reduce the temperature effect and the secondary internal force caused by concrete shrinkage creep, fully exert the advantages of two materials of steel and concrete, and has good economic benefit.
In order to achieve the above object, the present invention provides the following solutions: the invention provides a steel pipe-steel plate combined web plate steel-concrete combined box girder, which comprises a concrete top plate, a concrete bottom plate, a diaphragm structure and a steel pipe-steel plate combined web plate; the steel tube-steel plate combined web, the concrete top plate and the concrete bottom plate are connected to form a box girder main body, and the diaphragm structure is arranged at the two end fulcrums and the middle part of the box girder main body.
Preferably, the steel tube-steel plate combined web comprises a plurality of steel tubes and a plurality of flat steel plates which are welded at intervals.
Preferably, the steel pipes are round steel pipes or square steel pipes or mixed arrangement of round steel pipes and square steel pipes; when the square steel pipe is adopted as the steel pipe, the straight edge or the bending angle point of the square steel pipe is welded with the flat steel plate.
Preferably, the steel tube-steel plate combined web is provided with two pieces to form a single-box single-chamber box girder main body; or the steel tube-steel plate combined web plate is provided with a plurality of pieces to form a single-box multi-chamber box girder main body.
Preferably, the upper flange steel plate and the lower flange steel plate are welded on the upper edge and the lower edge of the steel tube-steel plate combined web respectively, and the upper flange steel plate and the lower flange steel plate are connected with the concrete top plate and the concrete bottom plate respectively through connecting pieces.
Preferably, the diaphragm structure comprises a fulcrum beam arranged at two ends of a box girder main body and a plurality of diaphragm plates arranged in the middle of the box girder main body, wherein the upper end and the lower end of each diaphragm plate are respectively and integrally cast with the concrete top plate and the concrete bottom plate, and the diaphragm plates are connected with the steel pipe-steel plate combined web plate through connecting pieces; the fulcrum beam and the concrete top plate and the concrete bottom plate are cast into a whole.
Preferably, two ends of the steel tube-steel plate combined web are inserted into the fulcrum beam, and an opening is formed in a flat steel plate of the part, inserted into the fulcrum beam, of the steel tube-steel plate combined web, and the opening is used for penetrating through a steel bar.
Preferably, the device further comprises a prestressing beam, wherein the prestressing beam comprises an in-vivo prestressing beam and an in-vitro prestressing beam.
Preferably, the internal prestress beam comprises a top plate internal prestress beam and a bottom plate internal prestress beam, wherein the top plate internal prestress beam is positioned in the concrete top plate, and the bottom plate internal prestress beam is positioned in the concrete bottom plate.
Preferably, two ends of the external prestress beam are anchored in the fulcrum beams at two ends of the box girder main body, two ends of the external prestress beam are bent close to the fulcrum beams, and steering of the external prestress beam is achieved through the diaphragm plates or additionally arranged steering blocks.
Compared with the prior art, the invention has the following technical effects:
1. the steel tube-steel plate combined web steel-concrete combined box girder can avoid the web cracking problem, simultaneously lighten the dead weight of the girder by 15% -25%, reduce the mid-span downwarping and improve the bridge crossing capacity;
2. by utilizing the characteristic that the steel pipe is easy to compress and deform, the longitudinal bridge of the steel pipe-steel plate combined web has deformability, so that the prestress application efficiency is improved, and the secondary internal force generated by temperature gradient, creep, shrinkage and the like of the concrete top and bottom plates is reduced;
3. the external rigidity of the web surface of the steel pipe-steel plate combination is high, and the requirement on the stability of the web can be met without welding a longitudinal and transverse stiffening rib structure;
4. two different materials of steel and concrete are reasonably combined, so that the stability, the strength and the use efficiency of the materials of the structure are improved;
5. the combined web can be directly welded in factories, the structure is simple, the processing is convenient, the top and bottom plates can be cast-in-situ or prefabricated parts, the site construction is convenient, and meanwhile, the vertical face of the box girder is attractive in appearance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a steel tube-steel plate combined web plate combined box girder structure of the invention;
FIG. 2 is a schematic view of a steel tube-steel sheet composite web of the embodiment of FIG. 1;
FIG. 3 is another schematic view of the steel tube-steel plate composite web of the embodiment of FIG. 1;
FIG. 4 is a third schematic view of a steel tube-steel sheet composite web of the embodiment of FIG. 1;
FIG. 5 is a schematic illustration of the connection of the steel tube-steel plate composite web to the concrete ceiling and floor in the embodiment of FIG. 1;
FIG. 6 is a schematic view of the connection structure between the steel tube-steel plate composite web and the fulcrum beam in the embodiment of FIG. 1;
fig. 7 is a schematic view of the connection structure between the steel pipe-steel plate composite web and the diaphragm in the embodiment of fig. 1.
1, a concrete top plate; 2. a concrete floor; 3. steel tube-steel plate combined web; 4. an upper flange steel plate; 5. a lower flange steel plate; 6. a fulcrum beam; 7. a diaphragm; 8. a stress beam is pre-stressed in the top plate body; 9. the stress beam is pre-stressed in the bottom plate body; 10. an external pre-stress beam; 11. a connecting piece; 12. round steel pipes; 13. square steel pipes; 14. a flat steel plate; 15. and (5) opening holes.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in fig. 1 to 7, the present embodiment provides a steel pipe-steel plate combined web steel-concrete combined box girder, which comprises a concrete top plate 1, a concrete bottom plate 2, a steel pipe-steel plate combined web 3, an upper flange steel plate 4, a lower flange steel plate 5, a fulcrum beam 6, a diaphragm 7, a pre-stressing beam 8 in the top plate, a pre-stressing beam 9 in the bottom plate, an external pre-stressing beam 10, a connecting piece 11 and the like.
In the embodiment, the upper flange steel plate 4 and the lower flange steel plate 5 are welded on the upper edge and the lower edge of the steel pipe-steel plate combined web 3 respectively, and the flange steel plates are provided with connecting pieces 11 to form a complete steel member of the combined box girder. The two steel tube-steel plate combined webs 3 are connected with the concrete top plate 1 and the concrete bottom plate 2 through the connecting pieces 11 to form a combined box girder main body.
In this embodiment, the fulcrum beam 6 is disposed at a beam end of the box girder body, and the diaphragm 7 is disposed in the box girder body, and a plurality of diaphragms 7 may be disposed, typically in midspan, 1/4 span, etc.
In the embodiment, the pre-stressing beam 8 in the top plate body is arranged in the concrete top plate 1, the pre-stressing beam 9 in the bottom plate body is arranged in the concrete bottom plate 2, the external pre-stressing beam 10 is arranged in the box girder, the two ends of the external pre-stressing beam 10 are anchored in the supporting point cross beams 6 at the girder ends, the external pre-stressing beam 10 bends near the girder ends, and the steering is realized through the cross plates 7 or additionally arranged steering blocks. The external prestressing beam 10 is preferably diverted by the diaphragm 7 in this embodiment. Specifically, the prestressing tendons are prestressed tendons or other structures meeting the requirements.
In this embodiment, as shown in fig. 2 to 4, the steel tube-steel plate composite web 3 is formed by welding a plurality of steel tubes and a plurality of flat steel plates 14 at intervals in a factory, and the steel tubes may be round steel tubes 12, square steel tubes 13 or a mixture of round steel tubes 12 and square steel tubes 13. The welding position of the square steel tube 13 and the flat steel plate 14 can be a straight edge of the square steel tube 13 (shown in fig. 3) or a bending point of the square steel tube 13 (shown in fig. 4).
Further, the diameter of the round steel pipe 12 or the side length of the square steel pipe 13 can be generally 15 cm-30 cm, the thickness of the steel pipe can be generally 10-24 mm, the width of the flat steel plate 14 along the bridge direction can be generally 2-6 m, and the thickness can be generally 10-24 mm. The steel tube-steel plate composite web 3 shown in fig. 1 employs a round steel tube 12.
As shown in fig. 5, in the present embodiment, the joint between the steel pipe-steel plate composite web 3 and the concrete top plate 1 and the concrete bottom plate 2 is a flange type joint structure, and includes a steel pipe-steel plate composite web 3, an upper flange steel plate 4, and a lower flange steel plate 5. The steel pipe-steel plate combined web 3 is respectively welded with an upper flange steel plate 4 and a lower flange steel plate 5, the upper flange steel plate 4 is connected with the concrete top plate 1 through a connecting piece 11, and the lower flange steel plate 5 is connected with the concrete bottom plate 2 through the connecting piece 11; specifically, the connectors are shear connectors, preferably welded pin connectors.
As shown in fig. 6, in this embodiment, the steel tube-steel plate combined web 3 and the fulcrum beam 6 are in an insertion connection mode, two ends of the steel tube-steel plate combined web 3 are respectively inserted into the fulcrum beam 6 at the beam end, an opening 15 is formed in a flat steel plate 14 inserted into the fulcrum beam 6, steel bars can be selected to penetrate through the opening 15, the diameter of the opening 15 can be generally 50-90 mm, the diameter of the steel bars to be perforated can be 20-28 mm, and the number of the openings 15, the diameter of the steel bars to penetrate through and the insertion depth of the web are determined through calculation according to the stress condition of the joint.
In the present embodiment, as shown in fig. 7, the diaphragm 7 and the steel pipe-steel plate composite web 3 are connected by a connecting member 11, and the flat steel plate 14 area of the steel pipe-steel plate composite web 3 can be selected as the joint for convenience of construction. Specifically, the connector 11 is selected from a welded pin connector.
The concrete construction process of the steel pipe-steel plate combined web plate combined box girder in the embodiment is as follows:
firstly, welding a steel pipe and a flat steel plate in a factory to form a steel pipe-steel plate combined web 3; welding an upper flange steel plate 4, a lower flange steel plate 5 and a connecting piece 11 on the upper edge and the lower edge of the steel pipe-steel plate combined web 3; erecting left and right steel tube-steel plate combined webs 3; building a pouring template of a concrete top plate 1, a concrete bottom plate 2, a fulcrum beam 6 and a diaphragm 7 by using a left steel tube-steel plate combined web 3 and a right steel tube-steel plate combined web 3; burying pipelines of the pre-stressing beam 8 in the top plate body and the pre-stressing beam 9 in the bottom plate body; paving a reinforced net of a concrete top plate 1, a concrete bottom plate 2, a fulcrum beam 6 and a diaphragm 7; pouring concrete is completed; tensioning the top plate internal prestress beam 8, the bottom plate internal prestress beam 9 and the external prestress beam 10.
The combined box girder with the steel pipe-steel plate combined web plate can lighten the dead weight of a bridge, increase the spanning capacity of the bridge, avoid web plate cracking, improve the prestress application efficiency, reduce the temperature effect and the secondary internal force caused by concrete shrinkage creep, fully exert the advantages of two materials of steel and concrete, and have good economic benefit.
The above-described embodiment is only a specific example of the invention, which may be varied within the scope of the claims. For example, in the above embodiment, a steel pipe-steel plate combined web plate is added in the middle of the box girder to form a single-box double-chamber box girder, or a plurality of steel pipe-steel plate combined webs plates are added to form a single-box multi-chamber box girder; for another example, the above embodiment is applied to a certain span of a multi-span continuous beam or continuous steel bridge to form a multi-span steel tube-steel plate combined web plate combined box girder bridge; for another example, the steel tube-steel plate composite web in the above embodiment may be of variable height, forming a variable height steel tube-steel plate composite web composite box girder.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (8)
1. A steel pipe-steel sheet combination web steel-concrete combination case roof beam which characterized in that: the concrete slab comprises a concrete top plate, a concrete bottom plate, a diaphragm structure and a steel tube-steel plate combined web; the steel tube-steel plate combined web, the concrete top plate and the concrete bottom plate are connected to form a box girder main body, and the diaphragm structure is arranged at the two end fulcrums and the middle part of the box girder main body; the steel tube-steel plate combined web consists of a plurality of steel tubes and a plurality of flat steel plates which are welded at intervals, and the steel tube-steel plate combined web is provided with two steel tubes to form a single-box single-chamber box girder main body; or the steel tube-steel plate combined web plate is provided with a plurality of pieces to form a single-box multi-chamber box girder main body.
2. The steel pipe-steel plate composite web steel-concrete composite box girder according to claim 1, wherein: the steel pipes are arranged by adopting round steel pipes or square steel pipes or mixing round steel pipes and square steel pipes; when the square steel pipe is adopted as the steel pipe, the straight edge or the bending angle point of the square steel pipe is welded with the flat steel plate.
3. The steel pipe-steel plate composite web steel-concrete composite box girder according to claim 1, wherein: the upper flange steel plate and the lower flange steel plate are respectively welded on the upper edge and the lower edge of the steel tube-steel plate combined web, and are respectively connected with the concrete top plate and the concrete bottom plate through connecting pieces.
4. The steel pipe-steel plate composite web steel-concrete composite box girder according to claim 1, wherein: the diaphragm structure comprises a fulcrum cross beam arranged at two ends of a box girder main body and a plurality of diaphragm plates arranged in the middle of the box girder main body, wherein the upper end and the lower end of each diaphragm plate are respectively and integrally cast with the concrete top plate and the concrete bottom plate, and the diaphragm plates are connected with the steel pipe-steel plate combined web plate through connecting pieces; the fulcrum beam and the concrete top plate and the concrete bottom plate are cast into a whole.
5. The steel pipe-steel plate composite web steel-concrete composite box girder according to claim 4, wherein: and two ends of the steel tube-steel plate combined web are inserted into the fulcrum beam, an opening is formed in a flat steel plate of the part, inserted into the fulcrum beam, of the steel tube-steel plate combined web, and the opening is used for penetrating through a steel bar.
6. The steel pipe-steel plate composite web steel-concrete composite box girder according to claim 4, wherein: also included is a prestressing beam including an in vivo prestressing beam and an in vitro prestressing beam.
7. The steel pipe-steel plate composite web steel-concrete composite box girder according to claim 6, wherein: the internal prestressing force bundles comprise a top plate internal prestressing force bundle and a bottom plate internal prestressing force bundle, wherein the top plate internal prestressing force bundles are positioned in the concrete top plate, and the bottom plate internal prestressing force bundles are positioned in the concrete bottom plate.
8. The steel pipe-steel plate composite web steel-concrete composite box girder according to claim 7, wherein: the two ends of the external prestress beam are anchored in the fulcrum beams at the two ends of the box girder main body, the two ends of the external prestress beam are bent close to the fulcrum beams, and steering of the external prestress beam is achieved through the transverse partition plates or additionally arranged steering blocks.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910485177.8A CN110067185B (en) | 2019-06-05 | 2019-06-05 | Steel pipe-steel plate combined web steel-concrete combined box girder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910485177.8A CN110067185B (en) | 2019-06-05 | 2019-06-05 | Steel pipe-steel plate combined web steel-concrete combined box girder |
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| CN110067185A CN110067185A (en) | 2019-07-30 |
| CN110067185B true CN110067185B (en) | 2024-03-19 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110644346A (en) * | 2019-09-30 | 2020-01-03 | 中铁二院工程集团有限责任公司 | Steel pipe-steel plate combined steel web plate |
| CN111236075B (en) * | 2020-01-21 | 2021-07-02 | 滁州职业技术学院 | External prestressed reinforcement bundle mounting structure of concrete box bridge |
| CN111749137A (en) * | 2020-07-14 | 2020-10-09 | 郑州大学 | Assembled section beam jointed by plate girders and assembling method thereof |
| CN113202010A (en) * | 2021-05-07 | 2021-08-03 | 中交一公局集团有限公司 | Prestressed concrete cast-in-place box girder structure and construction method thereof |
| CN113338152B (en) * | 2021-06-22 | 2022-05-17 | 广西北投公路建设投资集团有限公司 | Steel-concrete composite web and construction method thereof |
| CN114922043A (en) * | 2022-05-27 | 2022-08-19 | 武汉大学 | Box girder and box girder bridge |
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| CN110067185A (en) | 2019-07-30 |
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