CN214783221U - Prefabricated reinforced rectangular concrete-filled steel tubular truss composite beam - Google Patents
Prefabricated reinforced rectangular concrete-filled steel tubular truss composite beam Download PDFInfo
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- CN214783221U CN214783221U CN202121089966.9U CN202121089966U CN214783221U CN 214783221 U CN214783221 U CN 214783221U CN 202121089966 U CN202121089966 U CN 202121089966U CN 214783221 U CN214783221 U CN 214783221U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 117
- 239000010959 steel Substances 0.000 title claims abstract description 117
- 239000004567 concrete Substances 0.000 title claims abstract description 63
- 239000002131 composite material Substances 0.000 title claims description 24
- 239000007787 solid Substances 0.000 claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 15
- 239000003351 stiffener Substances 0.000 claims abstract description 3
- 230000003187 abdominal effect Effects 0.000 claims description 3
- 229910000746 Structural steel Inorganic materials 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002457 bidirectional effect Effects 0.000 description 7
- 230000002787 reinforcement Effects 0.000 description 7
- 238000005452 bending Methods 0.000 description 5
- 239000011513 prestressed concrete Substances 0.000 description 5
- 210000001015 abdomen Anatomy 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Abstract
一种装配式拉筋矩形钢管混凝土桁架组合梁，包括拉筋矩形钢管桁架，灌注在主弦管的混凝土以及桥面板。所述拉筋矩形钢管桁架由三节段拉筋矩形钢管桁架焊接而成，所述分段拉筋矩形钢管桁架由主弦管、斜腹管、网格型联系管以及变截面工字钢焊接组成，所述桥面板为预制实心混凝土板装配而成，所述桥面板与装配式拉筋矩形钢管桁架通过开孔加劲肋连接为整体。本实用新型与传统的预应力箱梁相比，刚度大、延性好、受力合理、装配化程度高、施工方便，弥补了钢管约束效果不足，增强了钢管与混凝土之间粘结，增加了梁的跨度，减少了桥墩的数量，提高了经济效益。
The utility model relates to an assembled beam with a reinforced rectangular steel tube concrete truss, comprising a reinforced rectangular steel tube truss, concrete poured into a main chord tube and a bridge deck. The tie-bar rectangular steel pipe truss is welded by three-section tie-bar rectangular steel pipe truss, and the segmented tie-bar rectangular steel pipe truss is composed of main chord pipe, inclined web pipe, grid-type connecting pipe and variable-section I-beam welding. The bridge deck is assembled from a prefabricated solid concrete slab, and the bridge deck and the assembled tie-bar rectangular steel pipe truss are connected as a whole through opening stiffeners. Compared with the traditional prestressed box girder, the utility model has the advantages of high rigidity, good ductility, reasonable stress, high degree of assembly and convenient construction, which makes up for the insufficient restraint effect of the steel pipe, enhances the bonding between the steel pipe and the concrete, and increases the The span of the beam reduces the number of piers and improves the economic benefits.
Description
Technical Field
The utility model relates to a bridge technical field specifically is an assembled lacing wire rectangle steel pipe concrete truss composite beam.
Background
In recent decades, with the development of national economy and urban traffic, bridges across rivers and sea are increasing, the proportion of composite beams in bridge engineering is increasing, bridge construction is developing towards the trend of being longer, higher and lighter, the span is increasing, the body shape is more and more complex, new materials are increasing in application, the structural system is more and more novel, and the construction technology is more and more advanced. The truss composite beam can fully utilize the advantages of large rigidity, large span and high assembly degree of the truss, reduce the section size and reduce the dead weight.
The truss composite beam is taken as a bending-resistant component bearing vertical load, the structural advantages are fully exerted, the truss composite beam has excellent bending resistance and high assembly degree, and the truss composite beam is more and more emphasized by people due to the advantages and the characteristics of the truss composite beam and is more and more applied to engineering practice. The prestressed concrete box girder commonly adopted in the prior engineering has the following technical defects: 1. the beam body has a great self weight and a limited span; 2. the loss of prestress is large, the rigidity of the beam is reduced, and the service life of the beam is prolonged; 3. the beam body can crack, and normal use is influenced.
Therefore, the research and development of the structural form of the assembled type tie bar rectangular steel tube concrete truss combined beam which is economical, practical and convenient to construct has very important practical significance and social and economic values.
SUMMERY OF THE UTILITY MODEL
The utility model provides a prior art not enough and provide an assembled lacing wire rectangle steel pipe concrete truss composite beam that bearing capacity is high, bending rigidity is big, the utility model discloses the atress is reasonable, and the level of assemblability is high, and construction convenience has shortened the time limit for a project greatly, has solved that steel pipe restraint effect is not enough, bond bad problem between steel pipe and the concrete, compares with traditional prestressed concrete box girder, has improved the span of roof beam, has reduced the dead weight, has reduced the quantity of pier, has practiced thrift engineering cost, is applicable to highway and railway bridge structure.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an assembled type tie bar rectangular steel tube concrete truss composite beam comprises a tie bar rectangular steel tube truss, the lacing bar rectangular steel pipe truss comprises a main chord pipe, an inclined belly pipe, a grid type connecting pipe and variable cross-section I-shaped steel, the main chord pipes are internally provided with two-way opposite lacing wires and are filled with concrete, four main chord pipes are arranged along the length direction of the bridge deck, each main chord pipe comprises two upper chord pipes and two lower chord pipes, the cross section of the rectangular steel pipe truss with the lacing wires forms an inverted trapezoid at the arrangement positions of the upper chord pipes and the lower chord pipes, the two upper chord pipes and the two lower chord pipes are connected through grid type connecting pipes, the upper chord pipes and the lower chord pipes at the same side are connected with each other through a plurality of inclined belly pipes, the bridge deck is supported and fixed on the upper chord pipe, the grid-shaped connection pipe and the variable cross-section I-shaped steel.
In this embodiment, the lattice-type connection pipes are composed of a plurality of transverse connection pipes which are welded between two upper chord pipes and between two lower chord pipes and are arranged perpendicular to the main chord pipes, and a plurality of longitudinal connection pipes which are welded between two adjacent transverse connection pipes and are arranged in the same direction as the main chord pipes, and the connection pipes and the adjacent longitudinal connection pipes form an i shape.
In this embodiment, the upper chord pipe and the upper surface of the grid-type connection pipe connected with the upper chord pipe are fixed with perforated stiffening ribs along the pipe length direction, and the bridge deck is connected with the fabricated tie bar rectangular steel pipe truss into a whole through the perforated stiffening ribs.
In the embodiment, the adjacent inclined belly pipes are arranged at the main chord pipes in a head-to-tail approaching or connecting way and are connected with the main chord pipes to form a triangle
In this embodiment, the fabricated tie bar rectangular steel pipe truss is divided into a plurality of sections of tie bar rectangular steel pipe trusses along the length direction of the bridge deck, and the adjacent sections of tie bar rectangular steel pipe trusses are welded with each other.
In this embodiment, the main chord tube has a rectangular cross-sectional shape, and the oblique abdominal tube, the lateral connection tube, and the longitudinal connection tube have a square cross-sectional shape.
In this embodiment, the main chord tube includes U type channel-section steel, steel sheet and two-way lacing wire, two-way trilateral welding of welding robot is passed through to the lacing wire and U type channel-section steel inner wall, ordinary steel sheet and channel-section steel welding will channel-section steel open end seals, two-way main chord tube of piecing together into through welding robot welding to the lacing wire fourth side and ordinary steel sheet, the concrete has been pour in the main chord tube.
In this embodiment, two-way tie rod includes mutual welded hoop reinforcement and longitudinal direction locating reinforcement, the longitudinal direction locating reinforcement welds four angular points at the hoop reinforcement respectively, the longitudinal direction locating reinforcement is arranged along the length direction of roof beam length, two-way tie rod is evenly arranged along length direction inside the main chord pipe.
In this embodiment, the deck slab is formed by assembling a plurality of prefabricated solid concrete slabs, a U-shaped steel bar is reserved on the connecting surface of each prefabricated solid concrete slab, adjacent prefabricated solid concrete slabs are arranged in a staggered mode through the U-shaped steel bar, the constructional steel bar and the perforated stiffening rib to form a pouring belt, and concrete is poured on the pouring belt to connect the adjacent prefabricated solid concrete slabs into a whole.
The utility model discloses compare with traditional prestressed concrete box girder, its bending stiffness and bearing capacity are great, have avoided the fracture of prestressing loss and concrete. Under the reasonable design condition, can increase the span, reduce the dead weight for the construction progress.
The utility model discloses the intussuseption concrete and two-way to the lacing wire can prevent steel pipe local buckling, two-way to the lacing wire can reduce sliding between steel pipe and the concrete, the bonding between reinforcing steel pipe and the concrete to the stability and the ductility of steel pipe have been strengthened. The tie bar rectangular steel tube concrete truss composite beam has the advantages that the assembly degree is high, the construction progress is fast, and all components can be machined in advance in a factory.
By adopting the scheme, the plurality of segments of the rectangular steel pipe trusses prefabricated in a factory are spliced into the complete rectangular steel pipe truss through welding connection, concrete is poured in the main chord pipe, the perforated stiffening ribs are welded on the upper surface of the steel pipe truss, and finally the prefabricated solid concrete slab is assembled to form the complete bridge deck. The whole process is high in assembly degree, the bidirectional opposite tie bars make up the defect that the rectangular steel tube is not enough for the constraint of concrete, the bonding between the steel tube and the concrete is enhanced, the infilled concrete and the bidirectional opposite tie bars can prevent the steel tube from locally buckling, and compared with a traditional prestressed concrete box girder, the assembled tie bar rectangular steel tube concrete truss combination girder has the advantages that the bearing capacity and the rigidity are obviously increased, the span is increased, the dead weight is reduced, and the structural performance is further optimized.
To sum up, the utility model discloses bear the weight of the dynamic height, bending stiffness is big, the span is big, the dead weight is light, the ductility is good, overall stability is strong, the atress is reasonable, construction convenience, has both compensatied the not enough defect of steel pipe restraint effect, has strengthened the bonding between steel pipe and the concrete, has solved prestressed concrete box girder again from great, be not suitable for the great condition of span, this discovery is applicable to highway and railway bridge.
Drawings
Fig. 1 is a schematic view of the present invention applied to a highway and a railroad bridge.
Fig. 2 is the structural schematic diagram of the multi-section tie bar rectangular steel pipe truss of the utility model.
Fig. 3(a) is a detailed view of the structure of the rectangular steel pipe truss with a plurality of segmental lacing wires of the present invention.
Fig. 3(b) is a detailed view of the structure of the rectangular steel pipe truss with a plurality of segmental lacing wires of the utility model II.
Fig. 3(c) is a detailed view of the structure of the rectangular steel pipe truss with a plurality of segmental lacing wires.
Fig. 4 is the utility model discloses lacing wire rectangle steel pipe concrete truss composite beam section structure sketch map.
Fig. 5 is a schematic view of the sectional structure of the main chord of the present invention.
Fig. 6 is a plan view of a general steel plate of the present invention.
Fig. 7 is a schematic view of the structure of the bidirectional opposite tie bar of the present invention.
FIG. 8 is a schematic view of the plane structure of the bridge deck of the present invention.
Fig. 9 is a schematic sectional structure view of the precast solid concrete slab of the present invention.
In the figure: 1. a tendon-stretching rectangular steel pipe truss; 2. concrete; 3. a bridge deck; 4. segment tie bar rectangular steel pipe truss; 5. a main chord tube; 6. a diagonal abdominal tube; 7. a mesh-type communication pipe; 8. variable cross-section I-steel; 9. bidirectional opposite lacing; 10. a tailpiece; 11. a lower chord tube; 12. a transverse communication pipe; 13. a longitudinal communication pipe; 14. opening a stiffening rib; 15. u-shaped channel steel; 16. a plain steel plate; 17. hoop reinforcement; 18. longitudinally positioning the reinforcing steel bars; 19. prefabricating a solid concrete slab; 20. u-shaped steel bars; 21. and constructing the steel bars.
Detailed Description
For a better understanding of the present invention, the following detailed description of the present invention is made with reference to the accompanying drawings and examples, but the present invention is not limited thereto.
As shown in the accompanying drawings 1 to 8, the assembled type tie bar rectangular steel tube concrete truss composite beam comprises a tie bar rectangular steel tube truss 1, wherein the tie bar rectangular steel tube truss 1 comprises a main chord tube 5, an inclined web tube 6, a grid type connection tube 7, variable cross-section I-shaped steel 8 and bidirectional tie bars 9, each bidirectional tie bar 9 comprises a hoop rib 17 and a longitudinal positioning steel bar 18 which are welded with each other, and the bidirectional tie bars 9 are uniformly arranged inside the main chord tube 5 along the length direction. The main chord 5 includes U type channel bar 15, ordinary steel sheet 16 and two-way to lacing wire 9, two-way to lacing wire 9 and the trilateral welding of welding robot of the 15 inner walls of U type channel bar, ordinary steel sheet 16 and the welding of U type channel bar 15 will the 15 opening ends of U type channel bar are sealed, two-way to lacing wire 9 fourth side and ordinary steel sheet 16 through welding robot welding assemble into main chord 5, concrete 2 has been pour in the main chord 5.
The four main chord pipes 5 are distributed along the length direction of the bridge deck 3, the four main chord pipes 5 comprise two upper chord pipes 10 and two lower chord pipes 11, the cross sections of the reinforcement rectangular steel pipe truss 1 form an inverted trapezoid at the distribution positions of the upper chord pipes 10 and the lower chord pipes 11, the two upper chord pipes 10 and the two lower chord pipes 11 are connected through grid-shaped connecting pipes 7, the upper chord pipes 10 and the lower chord pipes 11 on the same side are connected with each other through a plurality of inclined web pipes 6, the adjacent inclined web pipes 6 are close to or connected with the main chord pipes 5 end to form a triangle, variable-section I-shaped steel 8 is welded on the outer side surface of the upper chord pipes 10, perforated stiffening ribs 14 are fixed on the upper surfaces of the upper chord pipes 10 and the grid-shaped connecting pipes 7 connected with the upper chord pipes 10, the bridge deck 3 is supported on the upper chord pipes 10, the grid-shaped connecting pipes 7 and the variable-section I-shaped steel 8, the bridge deck 3 is formed by mutually assembling a plurality of prefabricated solid slabs 19, u-shaped steel bars 20 are reserved on the connecting surfaces of the prefabricated solid concrete plates 19, the adjacent prefabricated solid concrete plates 19 are arranged in a staggered mode through the U-shaped steel bars 20, the constructional steel bars 21 and the perforated stiffening ribs 14 to form pouring belts, and concrete is poured on the pouring belts to connect the adjacent prefabricated solid concrete plates 19 into a whole.
In this embodiment, the lattice-type connection pipes 7 are composed of a plurality of transverse connection pipes 12 welded between each group of main chord pipes 5 and arranged perpendicular to the main chord pipes 5, and longitudinal connection pipes 13 welded between two adjacent transverse connection pipes 12 and arranged in the same direction as the main chord pipes 5, and the connection pipes and the adjacent longitudinal connection pipes 13 form an i-shape. The assembled tie bar rectangular steel pipe truss 1 is divided into a plurality of sections of tie bar rectangular steel pipe trusses 4 along the length direction of the bridge deck 3, so that transportation is facilitated, and the adjacent sections of tie bar rectangular steel pipe trusses are welded with each other. The section of the main chord tube 5 is rectangular, and the section of the inclined belly tube 6, the transverse connection tube 12 and the longitudinal connection tube 13 is square.
In this embodiment, the grades of steel materials adopted by the main chord tube 5, the inclined web tube 6, the variable cross-section i-shaped steel, the transverse connection tube 12 and the longitudinal connection tube 13 are not lower than Q345, the included angle between the inclined web tube and the main chord tube is 60 degrees, the model HRB400 of the steel bars adopted by the two-way opposite lacing wire 9, the U-shaped steel bar 20 and the construction steel bar 21 is manufactured, the diameter is not less than 10mm, and the strength of the concrete 2 is not lower than C40. The open-hole stiffeners 14 are of steel grade no less than Q345. The strength of the precast solid concrete plate 19 is not lower than C40.
The utility model discloses a construction method of assembled lacing wire rectangle steel pipe concrete truss composite beam as follows, including following step:
1) the rectangular steel pipe truss with the plurality of sections of tie bars is processed in a factory and then transported to the site for hoisting.
2) Hoisting the multi-segment rectangular tie bar steel pipe truss in place at a construction site, then welding to form a complete rectangular tie bar steel pipe truss, and finally pouring concrete in the main chord pipe;
3) the perforated stiffening ribs are welded on the upper surface of the lacing bar rectangular steel pipe truss along the length direction of the main chord pipes, the transverse connection pipes and the longitudinal connection pipes;
4) and arranging the prefabricated solid concrete plate on the upper surface of the tie bar rectangular steel pipe truss for assembling, and pouring concrete on a pouring belt formed by staggered arrangement of the U-shaped steel bars at the end of the prefabricated solid concrete plate, the perforated stiffening ribs and the constructional steel bars to form a complete bridge deck.
In addition, it should be noted that the present invention is not limited to the above embodiments, as long as the specific size or shape of the component is not specified, the component can be any size or shape corresponding to the structure, and no matter there is any change in the material composition, all the structural designs provided by the present invention are a variation of the present invention, which should be considered within the protection scope of the present invention.
Claims (9)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121089966.9U CN214783221U (en) | 2021-05-20 | 2021-05-20 | Prefabricated reinforced rectangular concrete-filled steel tubular truss composite beam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121089966.9U CN214783221U (en) | 2021-05-20 | 2021-05-20 | Prefabricated reinforced rectangular concrete-filled steel tubular truss composite beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106845A (en) * | 2021-05-20 | 2021-07-13 | 中南大学 | Assembled tie bar rectangular steel tube concrete truss composite beam and construction method thereof |
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2021
- 2021-05-20 CN CN202121089966.9U patent/CN214783221U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106845A (en) * | 2021-05-20 | 2021-07-13 | 中南大学 | Assembled tie bar rectangular steel tube concrete truss composite beam and construction method thereof |
| WO2022241814A1 (en) * | 2021-05-20 | 2022-11-24 | 中南大学 | Fabricated tie bar rectangular steel tube concrete truss composite beam and construction method therefor |
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