CN210216122U - Steel pipe stiffening web steel-concrete combined box girder - Google Patents
Steel pipe stiffening web steel-concrete combined box girder Download PDFInfo
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- CN210216122U CN210216122U CN201920840625.7U CN201920840625U CN210216122U CN 210216122 U CN210216122 U CN 210216122U CN 201920840625 U CN201920840625 U CN 201920840625U CN 210216122 U CN210216122 U CN 210216122U
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Abstract
The utility model discloses a steel pipe stiffening web steel-concrete combined box girder, which comprises a concrete top plate, steel pipe stiffening webs, a steel bottom plate, a cross brace structure and an upper flange plate, wherein the lower edges of the steel pipe stiffening webs on two sides are welded with the steel bottom plate, the upper edges of the steel pipe stiffening webs are welded with the upper flange plate, and the steel pipe stiffening webs, the steel bottom plate and the upper flange plate are welded into a groove-shaped steel structure; the top of going up the flange board is passed through the connecting piece and is connected with the concrete roof, and steel pipe stiffening web, steel bottom plate, go up flange board and concrete roof constitute the box girder structure, and a plurality of stull structures are arranged in the fulcrum and the box girder middle part of box girder. The utility model aims at providing a steel pipe stiffening web steel-concrete combination case roof beam can reduce steel web and the vertical rigidity of upper limb listrium, improves prestressing efficiency, coordinates concrete roof and steel construction deformation coordination ability simultaneously, reduces the inferior internal force that temperature, concrete contraction creep produced.
Description
Technical Field
The utility model relates to a bridge engineering technical field especially relates to a steel pipe web steel reinforced concrete combination case roof beam of putting more energy into.
Background
The channel steel box composite beam is also called as open steel box composite beam, and is composed of reinforced concrete top plate, flat steel bottom plate and flat steel web plate, as shown in figure 1, it has the advantages of large torsion-resistant bending-resistant rigidity, light dead weight and good anti-seismic property, and can be used for bridge deck construction by using channel steel box in advance. However, the channel type steel box composite beam also has a plurality of problems:
1. the longitudinal rigidity of the flat steel web is high, when the longitudinal prestress of the concrete top plate is tensioned, the flat steel web loses the longitudinal prestress which should be applied to the concrete top plate, the prestress efficiency is low, and materials are wasted.
2. In order to prevent the steel plate from buckling, a large number of longitudinal and transverse stiffening ribs must be welded on the flat steel web plate, so that a large number of welding seams are formed, and the processing is complex.
3. When the cell type steel case erects in advance, owing to be the opening cross-section, take place whole or local unstability very easily, need set up a lot of interim supporting steel members, treat that the concrete roof is installed the back, demolish interim component again, the construction procedure is many, takes place the incident easily in the work progress.
4. The steel web plate of the groove-shaped steel box is generally connected with the concrete top plate by adopting a connecting piece with an upper flange plate, and the concrete top plate is inconsistent with the deformation of a steel structure due to the influence of temperature and shrinkage creep, so that secondary internal force is generated, the concrete at the steel-concrete joint is easy to crack, and the safety and the durability of the structure are influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a steel pipe web steel reinforced concrete combination case roof beam of putting more energy into to solve the problem that above-mentioned prior art exists, can reduce steel web and upper limb flange plate longitudinal rigidity, improve prestressing efficiency, coordinate the concrete roof simultaneously and warp coordination ability with the steel construction, reduce temperature, the inferior internal force that the concrete shrinkage creeps and produces.
In order to achieve the above object, the utility model provides a following scheme: the utility model provides a steel pipe stiffening web steel-concrete combined box girder, which comprises a concrete top plate, a steel pipe stiffening web, a steel bottom plate, a cross brace structure and an upper flange plate, wherein the lower edge of the steel pipe stiffening web is welded with the steel bottom plate, the upper flange plate is welded on the upper edge of the steel pipe stiffening web, the steel bottom plate and the upper flange plate are welded into a groove-shaped steel structure; the top of going up the flange board pass through the connecting piece with the concrete roof is connected, steel pipe stiffening web, steel bottom plate, last flange board and concrete roof constitute the case roof beam structure, and are a plurality of the stull structure arranges in the fulcrum and the case roof beam middle part of case roof beam.
Furthermore, the steel pipe stiffening web is formed by welding a plurality of steel pipes and a plurality of flat steel plates at intervals, and the steel pipes are arranged in any one or two forms of round steel pipes and square steel pipes.
Furthermore, when the square steel pipe is adopted, the welding part of the steel pipe and the flat steel plate is the middle of a straight edge of the steel pipe or a bending angular point of the steel pipe.
Furthermore, the longitudinal bridge spacing of the steel pipes is 2-6m, the diameter of the round steel pipe or the side length of the square steel pipe is 10-30cm, and the wall thickness of the steel pipe is 6-20 mm.
Further, a prestressed tendon is arranged in the concrete top plate.
Furthermore, the stull structure includes a horizontal steel pipe and two down tube, the both ends of horizontal steel pipe are connected and are set up in both sides on the upper limb listrium, two the top of down tube with the center welding of horizontal steel pipe, the bottom welding is in steel pipe stiffening web lower edge.
Furthermore, the horizontal steel pipe adopts a square steel pipe or a round steel pipe, and the inclined rod adopts a steel pipe, an angle steel or a channel steel.
Further, steel bottom plate stiffening ribs are uniformly distributed on the steel bottom plate, and steel web vertical stiffening ribs are arranged on the flat steel plate of the steel pipe stiffening web.
The utility model discloses for prior art gain following technological effect:
(1) the steel pipe stiffening web and the cross brace structure both utilize the characteristic that a steel pipe is easy to compress and deform, can reduce the longitudinal rigidity of the steel web and the upper flange plate, improve the prestress efficiency, coordinate the deformation coordination capacity of the concrete top plate and the steel structure, and reduce the temperature and the secondary internal force generated by the shrinkage and creep of the concrete.
(2) The cross brace structure, the steel pipe stiffening web and the steel bottom plate form a closed frame structure, so that the structural integrity of the channel steel is good, the rigidity is high, the overall stability of the channel steel structure in the construction process is improved, the number of temporary construction members is reduced, materials are saved, the construction steps are simplified, and the construction time is shortened.
(3) The steel pipe stiffening web plate has high external rigidity, can meet the stability requirement of the web plate without welding a large number of longitudinal and transverse stiffening rib structures, and has simple structure and convenient construction.
(4) The utility model discloses rationally combine two kinds of different materials of steel, concrete, improved the stability of structure, intensity and the availability factor of material.
(5) The utility model discloses the cell type steel construction can directly be made at the welding of mill, and processing is convenient, and the concrete roof can adopt cast-in-place or prefabricated component, the site operation of being convenient for, and the case roof beam facade is handsome in appearance simultaneously.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a conventional channel steel box composite beam;
FIG. 2 is a schematic cross-sectional view of a steel-reinforced composite box girder with steel pipe stiffening webs;
FIG. 3 is a schematic side elevation view of a steel-reinforced concrete composite box girder with steel pipe stiffening webs;
FIG. 4 is a three-dimensional structural diagram of a channel steel structure;
FIGS. 5a, 5b and 5c are schematic diagrams of steel pipe stiffening web constructions;
wherein, 1, a concrete top plate; 2. a steel bottom plate; 201. a steel bottom plate stiffening rib; 3. a flat steel web; 301. a steel web vertical stiffener; 302. a steel web horizontal stiffener; 4. an upper flange plate; 5. pre-stressing tendons; 6. a connecting member; 7. traditional groove type combined box girder waling; 8. a steel pipe stiffening web; 801. round steel pipes; 802. a square steel pipe; 9. a cross brace structure; 901. a horizontal steel pipe; 902. a diagonal rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a steel pipe web steel reinforced concrete combination case roof beam of putting more energy into to solve the problem that above-mentioned prior art exists, can reduce steel web and upper limb flange plate longitudinal rigidity, improve prestressing efficiency, coordinate the concrete roof simultaneously and warp coordination ability with the steel construction, reduce temperature, the inferior internal force that the concrete shrinkage creeps and produces.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1-5, fig. 1 is a schematic cross-sectional view of a conventional channel steel box composite beam; FIG. 2 is a schematic cross-sectional view of a steel-reinforced composite box girder with steel pipe stiffening webs; FIG. 3 is a schematic side elevation view of a steel-reinforced concrete composite box girder with steel pipe stiffening webs; FIG. 4 is a three-dimensional structural diagram of a channel steel structure; FIGS. 5a, 5b and 5c are schematic diagrams of steel pipe stiffening web constructions.
As shown in fig. 2-5, the utility model provides a steel pipe stiffening web steel-concrete composite box girder mainly comprises concrete roof 1, steel bottom plate 2, steel pipe stiffening web 8, stull structure 9, upper flange plate 4, prestressed tendons 5 and connecting piece 6.
Referring to fig. 2, the steel pipe stiffening web 8, the steel bottom plate 2 and the upper flange plate 4 are welded to form a groove-shaped steel structure, and then are connected with the concrete top plate 1 through the connecting piece 6 to form a box girder structure, and the prestressed bundles 5 are arranged in the concrete top plate 1.
The cross bracing structure 9 is composed of a horizontal steel pipe 901 and two diagonal rods 902, and is arranged at the pivot of the box girder and the middle part of the box girder. Horizontal steel pipe 901 of stull can adopt square steel pipe or circular steel pipe, and its center aligns with last flange board 4 and is connected, is connected with the steel pipe in the steel pipe stiffening web 8 simultaneously, and stull structure 9 forms closed frame construction with steel pipe stiffening web 8 and steel bottom plate 2, and rigidity is big, increases the overall stability of box girder in the work progress and structure behind the bridge. The diagonal member 902 may be made of steel pipe, angle steel or channel steel.
The steel pipe stiffening web 8 is formed by welding a plurality of steel pipes and a plurality of flat steel plates (flat steel webs 3) at intervals, and the flat steel plates are provided with steel web vertical stiffening ribs 301 and steel web horizontal stiffening ribs 302. The steel pipe can adopt a round steel pipe 801, a square steel pipe 802 or a mixed system of the round steel pipe 801 and the square steel pipe 802. The welding position of the square steel pipe 802 and the flat steel plate can be a straight edge of the steel pipe 802 or a bending corner point of the steel pipe 802. The steel pipe longitudinal bridge spacing can generally be 2 ~ 6m in steel pipe stiffening web 8, and the diameter of round steel pipe 801 or the length of side of square steel pipe 802 can generally be 10cm ~ 30cm, and the steel pipe wall thickness can generally be 6 ~ 20 mm.
The utility model discloses during steel pipe stiffening web steel reinforced concrete combination case roof beam construction, the essential step is as follows:
firstly, steel members such as a round steel pipe 801 or a square steel pipe 802, a steel bottom plate 2, a cross-brace horizontal steel pipe 901, two diagonal rods 902, an upper flange plate 4 and the like are processed in a factory.
The second step, the steel structure module is assembled, constitute stull structure 9 with a horizontal steel pipe 901 and two down tube 902, become steel pipe stiffening web 8 with a plurality of steel pipes (round steel pipe 801 or square steel pipe 802 or round steel pipe 801 and square steel pipe 802 mixed system) and the interval welding of the flat steel sheet of polylith, weld connecting piece 6 on upper flange plate 4, connecting piece 6 can adopt to weld the nail, the trompil board, the channel-section steel, connecting pieces such as angle steel, steel bottom plate 2 welds steel bottom plate stiffening rib 201 as stable needs, upper flange plate 4 welds on steel pipe stiffening web 8 together with connecting piece 6.
And thirdly, assembling a box girder steel structure on the jig frame, laying a steel bottom plate 2, positioning a steel pipe stiffening web 8 and a cross brace structure 9, and welding corresponding positions to form a groove-shaped steel structure.
And fourthly, installing a concrete top plate 1 template, binding reinforcing steel bars, pouring concrete, stretching prestress 5 after the concrete reaches the design strength, and forming the steel pipe stiffening web steel-concrete combined box girder together with the groove steel structure.
The above-described embodiment is only one specific example of the invention, which may have numerous alternatives within the scope of the appended claims. In the above embodiment, one or more steel pipe stiffening webs 8 are added in the middle of the box girder to form a single-box multi-chamber box girder; the embodiment can be applied to a simple beam or a multi-span continuous beam or a certain span of a continuous steel bridge; the steel pipe stiffening webs 8 in the above embodiment can be variable in height to form a variable-beam-height steel pipe stiffening web combined box beam; the concrete roof panel 1 in the above embodiment may be of a prefabricated structure.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (8)
1. The utility model provides a steel pipe stiffening web steel reinforced concrete combination case roof beam which characterized in that: the steel tube stiffening web plate comprises a concrete top plate, steel tube stiffening webs, a steel bottom plate, a cross brace structure and an upper flange plate, wherein the lower edges of the steel tube stiffening webs on two sides are welded with the steel bottom plate, the upper flange plate is welded on the upper edge of the steel tube stiffening webs, and the steel tube stiffening webs, the steel bottom plate and the upper flange plate are welded into a groove-shaped steel structure; the top of going up the flange board pass through the connecting piece with the concrete roof is connected, steel pipe stiffening web, steel bottom plate, last flange board and concrete roof constitute the case roof beam structure, and are a plurality of the stull structure arranges in the fulcrum and the case roof beam middle part of case roof beam.
2. The steel tube stiffened web steel-concrete composite box girder of claim 1, wherein: the steel pipe stiffening web is formed by welding a plurality of steel pipes and a plurality of flat steel plates at intervals, and the steel pipes are arranged in any one or two forms of round steel pipes and square steel pipes.
3. The steel tube stiffened web steel-concrete composite box girder of claim 2, wherein: when the square steel pipe is adopted, the welding part of the steel pipe and the flat steel plate is the middle of a straight edge of the steel pipe or a bending angular point of the steel pipe.
4. The steel tube stiffened web steel-concrete composite box girder of claim 2, wherein: the longitudinal bridge spacing of the steel pipes is 2-6m, the diameter of the round steel pipe or the side length of the square steel pipe is 10-30cm, and the wall thickness of the steel pipe is 6-20 mm.
5. The steel tube stiffened web steel-concrete composite box girder of claim 1, wherein: and the concrete top plate is internally provided with prestressed tendons.
6. The steel tube stiffened web steel-concrete composite box girder of claim 1, wherein: the cross brace structure comprises a horizontal steel pipe and two inclined rods, the two ends of the horizontal steel pipe are connected and arranged on the upper flange plates on the two sides, the tops of the two inclined rods are welded with the center of the horizontal steel pipe, and the bottoms of the two inclined rods are welded on the lower edge of the steel pipe stiffening web.
7. The steel tube stiffened web steel-concrete composite box beam of claim 6, wherein: the horizontal steel pipe adopts square steel pipe or round steel pipe, the down tube adopts steel pipe, angle steel or channel-section steel.
8. The steel tube stiffened web steel-concrete composite box girder of claim 2, wherein: the steel bottom plate is evenly provided with steel bottom plate stiffening ribs, and the flat steel plate of the steel pipe stiffening web is provided with steel web vertical stiffening ribs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920840625.7U CN210216122U (en) | 2019-06-05 | 2019-06-05 | Steel pipe stiffening web steel-concrete combined box girder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920840625.7U CN210216122U (en) | 2019-06-05 | 2019-06-05 | Steel pipe stiffening web steel-concrete combined box girder |
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| CN210216122U true CN210216122U (en) | 2020-03-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112049008A (en) * | 2020-09-21 | 2020-12-08 | 湖南工学院 | Low-height groove-shaped steel-concrete composite beam and manufacturing method thereof |
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2019
- 2019-06-05 CN CN201920840625.7U patent/CN210216122U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110067186B (en) * | 2019-06-05 | 2024-03-19 | 深圳市市政设计研究院有限公司 | Steel pipe stiffening web steel-concrete combined box girder |
| CN112049008A (en) * | 2020-09-21 | 2020-12-08 | 湖南工学院 | Low-height groove-shaped steel-concrete composite beam and manufacturing method thereof |
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