CN213951909U - Tubular connecting piece suitable for steel-concrete composite structure - Google Patents
Tubular connecting piece suitable for steel-concrete composite structure Download PDFInfo
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- CN213951909U CN213951909U CN202022155719.6U CN202022155719U CN213951909U CN 213951909 U CN213951909 U CN 213951909U CN 202022155719 U CN202022155719 U CN 202022155719U CN 213951909 U CN213951909 U CN 213951909U
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- 239000004567 concrete Substances 0.000 title claims abstract description 46
- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 139
- 239000010959 steel Substances 0.000 claims abstract description 139
- 238000010276 construction Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The utility model discloses a tubular connecting piece suitable for steel-concrete composite structure, including cored nut and opening steel pipe, set up steel pipe reservation notch on the one end pipe wall of opening steel pipe, the opening steel pipe sets up the one end of steel pipe reservation notch and sets up the external screw thread, the threaded nut of belt is connected to external screw thread department; the split steel pipe and the nut with the core are reliably connected through machinery to form a whole, the inner core of the nut is used as the lining of the split steel pipe and is cooperatively stressed to effectively prevent the connecting piece from being damaged, and the shear resistant connecting piece has the advantages of a connecting piece form of a stud connecting piece and a perforated plate connecting piece, has higher rigidity and isotropy than the stud connecting piece, resists the longitudinal shear force between the steel beam and the concrete plate through the split steel pipe and the steel bar in the reserved groove of the steel pipe, and can bear the longitudinal and transverse shear forces between the steel beam and the concrete plate; the processing is convenient, the materials are easy to obtain, the cost is low, and the processing can be synchronously carried out with the steel beam; the combination effect is good, and the mechanical property is good.
Description
Technical Field
The utility model belongs to the technical field of structural engineering and steel-concrete integrated configuration bridge, concretely relates to cast connecting piece suitable for steel-concrete integrated configuration.
Background
The steel-concrete composite beam combines the steel beam and the concrete slab into a whole to bear force together through the shear connector, can give full play to the performance of steel and concrete materials, and is widely applied to various fields of engineering construction at present. The shear connector of the composite beam is a key part for ensuring the normal operation of the composite beam because the shear connector of the composite beam not only needs to resist the longitudinal shear between the steel beam and the concrete slab, but also ensures that the concrete slab and the steel beam are stressed cooperatively to prevent the concrete slab from being lifted. In the development and application process of the composite beam, a plurality of shear connectors are produced, and the shear connectors can be roughly divided into rigid connectors and flexible connectors according to the stress characteristics.
Rigid connecting pieces are mostly adopted in the early development stage of the composite beam, the main forms of the composite beam comprise square steel, T-shaped steel, horseshoe-shaped steel and the like, and the rigid connecting pieces are not beneficial to shear redistribution and are less in application. The perforated plate connecting piece (PBL connecting piece) is a rigid connecting piece which is widely applied in the later stage, and mainly resists longitudinal shearing force by the pin bolt action of concrete in a perforated steel plate, and a transverse steel bar can be penetrated in the perforated steel plate sometimes to improve the bearing capacity of the perforated steel plate and ensure good fatigue resistance. However, the perforated plate connecting piece has a cutting effect on the concrete, the concrete slab is artificially divided into a plurality of areas, the integrity of the concrete slab is influenced, the concrete slab cracks in the later period, and finally the bearing capacity of the whole composite beam is reduced. In addition, the perforated plate connecting piece is large in steel consumption and easy to cause brittle failure.
The flexible connecting piece mainly has the forms of a stud connecting piece, a high-strength bolt connecting piece and the like, and the stud connecting piece is the shear-resistant connecting piece which is most widely applied and has the best comprehensive performance at present. The stud connecting piece has the advantages of isotropy, high shearing resistance bearing capacity, high construction speed, convenience, easiness in guaranteeing of welding quality and the like, but can deform greatly under the action of shearing force, and the bearing capacity is reduced later, so that the stud connecting pieces are generally large in arrangement quantity and small in distance, the structural design is influenced, and the manufacturing cost is increased. In addition, the protruding area of the stud cap is small, cracks develop quickly and are damaged under the splitting action of concrete around the stud cap, and the lifting resistance of the stud is limited.
In summary, the perforated plate connecting piece mainly bears longitudinal shear force, the stud connecting piece can bear longitudinal and transverse shear force, other mechanical properties are weak, and the advantages and the disadvantages are obvious.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, the present invention provides a tubular connector suitable for a steel-concrete composite structure, which has the advantages of a stud connector and a perforated plate connector, and has a rigidity greater than that of the stud connector and isotropy.
In order to achieve the above purpose, the utility model adopts the technical scheme that: the tubular connecting piece comprises a cored nut and an opening steel pipe, wherein a steel pipe reserved notch is formed in the pipe wall of one end of the opening steel pipe, an external thread is formed in the end, provided with the steel pipe reserved notch, of the opening steel pipe, and the threaded nut is connected to the external thread.
And a transverse steel bar penetrates through the reserved notch, and is perpendicular to the axis of the open steel pipe.
The width of the reserved notch of the steel pipe is not less than 15mm and not less than the diameter of the steel bar to be penetrated.
And a limiting structure is arranged at the joint of the transverse steel bar and the opening steel pipe.
The nut with the core comprises a nut, a nut inner core is arranged in the nut, a nut inner thread is arranged on the inner wall of the nut, and a nut lower edge is arranged at the lower end of the nut.
Two groups of steel pipe reserved notches are formed, and the central lines of the two groups of steel pipe reserved notches are perpendicular to each other.
The outer wall of the other end of the opening steel pipe is provided with a grabbing nail.
The other end of the opening steel pipe is welded with a connecting plate.
Compared with the prior art, the utility model discloses following beneficial effect has at least: the split steel pipe and the nut with the core are reliably connected through machinery to form a whole, the inner core of the nut is used as the lining of the split steel pipe and is cooperatively stressed to effectively prevent the connecting piece from being damaged, and the shear resistant connecting piece has the advantages of a connecting piece form of a stud connecting piece and a perforated plate connecting piece, has higher rigidity and isotropy than the stud connecting piece, resists the longitudinal shear force between the steel beam and the concrete plate through the split steel pipe and the steel bar in the reserved groove of the steel pipe, and can bear the longitudinal and transverse shear forces between the steel beam and the concrete plate; the processing is convenient, the materials are easy to obtain, the cost is low, and the processing can be synchronously carried out with the steel beam; the combination effect is good, and the mechanical property is good; compared with the perforated plate connecting piece, the perforated plate connecting piece has the advantages that good transverse shear rigidity and shear strength are provided, the brittleness of the structure is reduced, the ductility of the structure is increased, and the effect that the lifting between the steel beam and the concrete plate is resisted by the nut of the integral shear connecting piece of the steel beam and the concrete plate is ensured; compared with the stud connecting piece, the high-strength anti-shear bolt has the advantages that good longitudinal and transverse shear rigidity and shear strength are provided, the bearing capacity of the structure is improved, the fatigue resistance of the structure is enhanced, and the high-strength anti-shear bolt has good anti-lifting capacity.
Furthermore, the transverse steel bars further enhance the anti-lifting capability;
drawings
Fig. 1a is a schematic view of the cored nut of the present invention.
FIG. 1b is the structure schematic diagram of the nut with core of the present invention
Fig. 1c is a schematic view of the open steel pipe of the present invention.
Fig. 2 is a schematic view of a working condition of the structure of the present invention.
Fig. 3 is another schematic view of the present invention.
In the figure: 1-a steel beam; 2-a concrete slab; 3-transverse steel bars; 4-nut with core, 41-lower edge of nut, 42-nut, 43-inner core of nut; 44-nut internal threads; 5-opening steel pipe, 51-reserved steel pipe notch and 52-external thread.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
As shown in fig. 1a, fig. 1b, fig. 1c, fig. 2, and fig. 3, a pipe-type connector suitable for a steel-concrete composite structure includes a cored nut 4 and an open steel pipe 5, a steel pipe reserved notch 51 is formed in a pipe wall of one end of the open steel pipe 5, an external thread is formed at one end of the open steel pipe 5 where the steel pipe reserved notch 51 is formed, and the threaded nut 4 is connected to the external thread.
A transverse steel bar 3 penetrates through the reserved notch 51, and the transverse steel bar 3 is perpendicular to the axis of the open steel pipe 5; the width of the steel pipe reserved notch 51 is not less than 15mm and not less than the diameter of the steel bar to be penetrated; and a limiting structure is arranged at the joint of the transverse steel bar 3 and the opening steel pipe 5.
The limiting structure specifically comprises: the hoops are arranged on the transverse steel bars 3 and are arranged on two sides of the opening steel pipes 5.
The limiting structure can also be a limiting block welded on the transverse steel bar, and the limiting block is arranged on two sides of the opening steel pipe 5.
Referring to fig. 1a and 1c, the cored nut 4 comprises a nut 42, a nut core 43 is arranged in the nut 42, a nut inner thread 44 is arranged on the inner wall of the nut 42, and a nut lower edge 41 is arranged at the lower end of the nut.
Optionally, two sets of steel pipe reserved notches 51 are formed, and the central lines of the two sets of steel pipe reserved notches 51 are perpendicular to each other.
The outer wall of the other end of the open steel pipe 5 is provided with a grabbing nail; the other end of the opening steel pipe 5 is welded with a connecting plate.
The opening direction of the opening steel pipe 5 in the tubular connecting piece is consistent with the arrangement direction of the stressed steel bars in the concrete slab, one end of the opening steel pipe 5 is welded on the flange plate of the steel beam, and the transverse steel bar at the other end passes through the steel pipe reserved notch 51 and then is provided with the nut 4 with the core, so that the connecting piece is reliably connected with the steel bars in the concrete bridge deck slab.
5 one end of opening steel pipe welds on 1 flange board of girder steel, and the other end and 4 mechanical connections of cored nut, and horizontal reinforcing bar 3 passes steel pipe reservation notch 51, reliably is connected with the reinforcing bar in the concrete bridge panel 2.
The nut with the core can effectively resist the lifting action between the steel beam and the concrete plate, and the transverse steel bar further enhances the lifting resistance; the open steel pipe 5 and the steel bars in the reserved groove resist longitudinal and transverse shearing forces between the steel beam and the concrete slab; the cored nut can be installed after steel pipe welding and steel bar implanting into the steel pipe reserved notch 51, is convenient to construct, and can be simultaneously suitable for precast concrete bridge decks and cast-in-place concrete bridge decks.
The cored nut 4 comprises a nut 42, a nut inner core 43 is arranged in the nut 42, a nut inner thread 44 is arranged on the inner wall of the nut 42, a nut lower edge 41 is arranged at the lower end of the nut, the nut inner core 43 extends into the opening steel pipe 5, the inner core of the cored nut can be used as a lining of a seamless opening steel pipe, the damage caused by opening of the steel pipe and reduction of strength can be effectively prevented, the opening steel pipe and the cored nut are reliably connected into a whole, and the bearing capacity of the structure is further improved by cooperation of stress.
The pipe type connecting piece suitable for the steel-concrete composite structure comprises an opening steel pipe 5, a cored nut 4 and a transverse reinforcing steel bar 3; the opening direction of the steel pipe of the tubular connecting piece is consistent with the arrangement direction of the steel bars in the concrete slab, one end of the opening steel pipe is welded on the flange plate of the steel beam, the other end of the opening steel pipe is mechanically connected with the nut with the core, and the transverse steel bars penetrate through the reserved grooves of the steel pipe and are reliably connected with the steel bars in the concrete bridge deck slab.
The transverse reinforcement may not pass through the pre-cut slot of the shear connector, which is equivalent to the reinforcement form of the peg connector.
Referring to fig. 2 and 3, the pipe-type connecting member for a steel-concrete composite structure according to the present invention is implemented as follows:
ST 01: manufacturing a steel beam 1;
ST 02: opening the steel pipe 5 and the screw cap 4, and forming a steel pipe reserved notch 51 with a required width on the steel pipe according to the design size requirement, wherein the width of the steel pipe reserved notch 51 is not less than 15mm and is not less than the diameter of a steel bar to be penetrated;
ST 03: hoisting the steel beam;
ST 04: welding the open steel pipe 5 to the flange of the steel beam according to the design requirement;
ST 05: and (3) installing precast concrete plates or cast-in-place concrete plates, and curing according to the specification to form a combined structure.
The shear connector is connected with the steel beam in a welding mode, and the transverse shear force between the steel beam and the concrete slab is resisted through the open steel pipe and the longitudinal steel bars in the concrete slab.
The shear connector can be processed synchronously with the steel beam, and two opening directions of the tubular connector are orthogonally arranged with the flange of the steel beam.
The foregoing is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting thereof, and any modifications, variations or improvements made within the spirit and scope of the invention are intended to be covered by the appended claims.
Claims (8)
1. A kind of tube type adapting piece suitable for steel-mix the composite construction, characterized by that: the steel pipe structure comprises a cored nut (4) and an opening steel pipe (5), wherein a steel pipe reserved notch (51) is formed in the pipe wall of one end of the opening steel pipe (5), an external thread is formed in the end, provided with the steel pipe reserved notch (51), of the opening steel pipe (5), and the cored nut (4) is connected to the external thread.
2. The pipe-type connection member for a steel-concrete composite structure according to claim 1, wherein: the reserved notch (51) is internally provided with a transverse steel bar (3) in a penetrating way, and the transverse steel bar (3) is vertical to the axis of the opening steel pipe (5).
3. The pipe-type connection member for a steel-concrete composite structure according to claim 2, wherein: the width of the steel pipe reserved notch (51) is not less than 15mm and not less than the diameter of the steel bar to be penetrated.
4. The pipe-type connection member for a steel-concrete composite structure according to claim 2, wherein: and a limiting structure is arranged at the joint of the transverse steel bar (3) and the opening steel pipe (5).
5. The pipe-type connection member for a steel-concrete composite structure according to claim 1, wherein: the nut (4) with the core comprises a nut (42), a nut inner core (43) is arranged in the nut (42), a nut inner thread (44) is formed in the inner wall of the nut (42), and a nut lower edge (41) is arranged at the lower end of the nut.
6. The pipe-type connection member for a steel-concrete composite structure according to claim 1, wherein: two groups of steel pipe reserved notches (51) are formed, and the central lines of the two groups of steel pipe reserved notches (51) are perpendicular to each other.
7. The pipe-type connection member for a steel-concrete composite structure according to claim 1, wherein: the outer wall of the other end of the open steel pipe (5) is provided with a grab nail.
8. The pipe-type connection member for a steel-concrete composite structure according to claim 1, wherein: the other end of the opening steel pipe (5) is welded with a connecting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022155719.6U CN213951909U (en) | 2020-09-27 | 2020-09-27 | Tubular connecting piece suitable for steel-concrete composite structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022155719.6U CN213951909U (en) | 2020-09-27 | 2020-09-27 | Tubular connecting piece suitable for steel-concrete composite structure |
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| Publication Number | Publication Date |
|---|---|
| CN213951909U true CN213951909U (en) | 2021-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022155719.6U Expired - Fee Related CN213951909U (en) | 2020-09-27 | 2020-09-27 | Tubular connecting piece suitable for steel-concrete composite structure |
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| CN (1) | CN213951909U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033205A (en) * | 2021-11-05 | 2022-02-11 | 北京航空航天大学 | Method for improving performance of existing steel-concrete composite beam |
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2020
- 2020-09-27 CN CN202022155719.6U patent/CN213951909U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033205A (en) * | 2021-11-05 | 2022-02-11 | 北京航空航天大学 | Method for improving performance of existing steel-concrete composite beam |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210813 |