CN114892503A - Connecting piece of anti-pulling and non-shearing open-ended steel-concrete composite beam - Google Patents
Connecting piece of anti-pulling and non-shearing open-ended steel-concrete composite beam Download PDFInfo
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- CN114892503A CN114892503A CN202210704763.9A CN202210704763A CN114892503A CN 114892503 A CN114892503 A CN 114892503A CN 202210704763 A CN202210704763 A CN 202210704763A CN 114892503 A CN114892503 A CN 114892503A
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- bar
- mounting hole
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- 239000004567 concrete Substances 0.000 title claims abstract description 58
- 238000010008 shearing Methods 0.000 title claims abstract description 19
- 239000002131 composite material Substances 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 54
- 239000010959 steel Substances 0.000 claims abstract description 54
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 18
- 239000000945 filler Substances 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 239000005060 rubber Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 4
- 230000002787 reinforcement Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012761 high-performance material Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
- E01D2101/285—Composite prestressed concrete-metal
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The application discloses a connecting piece of an anti-pulling and non-shearing open-ended steel-concrete composite beam. The connecting piece is used for solving the technical problem that the existing connecting pieces such as shear nails or shear shears are unfavorable for the stress of the hogging moment area structure. The connecting piece is applied to the hogging moment area of the steel-concrete combined beam structure, the tensile stress of the concrete bridge deck slab in the hogging moment area can be reduced, the prestress application effect can be improved by longitudinal non-shearing measures, and the vertical pulling resistance can resist the vertical separation and lifting of concrete and a steel beam. This connecting piece includes: the opening steel plate is used for being installed on the steel beam and is provided with a bending-shaped installation hole; and a through-bar for embedding within a concrete structure of a concrete slab, the through-bar being disposed within the mounting hole, the through-bar being configured to permit a specified degree of displacement of the through-bar relative to the mounting hole. The connecting piece of this application simple structure, the construction of being convenient for.
Description
Technical Field
The application relates to the technical field of bridge structures, in particular to a connecting piece of an anti-pulling and non-shearing open-type steel-concrete composite beam.
Background
The steel-concrete composite beam bridge connects the steel beam and the concrete bridge deck into a whole through the shear connector to bear force jointly. The steel beam bears tensile stress, the concrete bridge deck bears compressive stress, and the concrete bridge deck plays a role in restraining the compression flange of the steel beam, so that the overall stability of the steel beam is enhanced, the performances of two materials are fully exerted, the rigidity is high, the construction is short, the economic benefit is good, and the bridge is a bridge structure form with wide application. However, in the hogging moment area of the structure, the concrete bridge deck is pulled, the steel beam is pressed, the structure is in an unfavorable stress state, the rigidity of the combined beam is weakened due to the cracking of the concrete deck, harmful media can also permeate into the concrete, steel bars are corroded, and the concrete is corroded. In order to solve the problem, research is currently carried out to control the stress applied to the bridge deck slab in the hogging moment region to prevent and control the development of cracks mainly from the following aspects: a new structural form is adopted; prestress is applied to the bridge deck to control concrete cracking in a certain mode, but site construction is complex, most of prestress can be transmitted to the upper flange of the steel beam, and efficiency is low; allowing the concrete to crack, controlling the width of the crack by reinforcing the bars or from the material layer; the common concrete is replaced by other high-performance materials, so that the manufacturing cost is higher. Therefore, the existing steel-concrete composite beam structure connecting pieces such as studs and various PBL shear shears connect the steel beam and the concrete bridge deck together through shearing resistance and pulling resistance to cooperatively deform, work together to resist the internal force of the structure, and the connecting form is favorable for the structural stress of the positive bending moment area. The scholars propose that the connector which resists pulling and shearing has better effect.
In the related art, the anti-pulling and non-shearing mainly comprises a longitudinal non-shearing screw rod type connecting piece, a non-shearing T-shaped connecting piece and the like, but the connecting piece has more components and is complex to weld and construct, and a connecting piece which is used for the anti-pulling and non-shearing in a hogging moment area and is convenient to construct is lacked.
Disclosure of Invention
In view of this, the present application provides a connecting member for an anti-pulling and non-shearing open type steel-concrete composite beam, which solves the technical problem that the existing connecting members such as shear nails or shear shears are unfavorable to the structural stress of the hogging moment region.
The present application provides a connecting member of an anti-pulling and non-shearing open type steel-concrete composite girder for connecting a steel girder and a concrete slab filled with a concrete structure, the connecting member comprising:
the opening steel plate is used for being installed on the steel beam and is provided with a bending installation hole;
and a through-bar embedded within the concrete structure of the slab, the through-bar being disposed within the mounting hole, the through-bar being configured to allow a specified degree of displacement of the through-bar relative to the mounting hole.
Optionally, the mounting hole is L-shaped, and the through reinforcement is located at one of the straight sections of the L-shape.
Optionally, the outer surface of the through-reinforcement is provided with a filler material.
Optionally, the filler material is plastic, foam or rubber.
Optionally, the open-top steel plate extends along the length direction of the steel beam.
Optionally, the top of the mounting hole is flush with and communicates with the vertical top of the open steel plate.
When the connecting piece of the uplift-resistant non-shearing-resistant open type steel-concrete composite beam is applied to connecting a steel beam and a concrete slab, relative sliding can be generated between the steel beam and the concrete slab within the range of a mounting hole, the tensile stress borne by the concrete slab in a negative bending moment area can be reduced, meanwhile, the prestress application effect can be improved by adopting a non-shearing-resistant measure, and the uplift resistance can resist the vertical separation and lifting action of the concrete and the steel beam. Compared with the stud, the steel plate connecting piece is convenient to weld in a factory. The steel sheet open design, resistance to plucking through reinforcement can directly be placed at L shaped hole downtheholely, simple structure, construction convenience. The reverse design is adopted between two adjacent L-shaped holes, the longitudinal slippage in different directions of the reinforced concrete can be considered, and when the slippage is greatly prevented, all the reinforcing steel bars are pulled out, so that the pulling resistance stability is improved.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a connecting member provided in an embodiment of the present application in a connected state from a perspective.
Fig. 2 is a schematic structural diagram of another view angle of the connection component in the connection state according to the embodiment of the present application.
Fig. 3 is a perspective view of a connector according to an embodiment of the present application.
Wherein the elements in the figures are identified as follows:
1-steel beam upper flange plate; 2-steel beam web; 3-a steel beam bottom plate; 4-concrete slab reinforcing steel; 5-concrete; 6-mounting holes; 7-penetrating steel bars; 8-a filler material; 9-open steel plate.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
As shown in fig. 1, the steel beam is composed of an upper flange plate 1, a web plate 2 and a bottom plate 3, and the concrete slab is composed of concrete slab reinforcing steel bars 4 and a concrete structure 5.
The longitudinal non-shearing open type uplift steel-concrete composite beam connecting piece is used for connecting a steel beam and a concrete slab and comprises an open steel plate 9 and a through steel bar 7, wherein the open steel plate 9 is welded on a flange plate on the steel beam and is provided with a mounting hole 6. The through-reinforcement 7 is embedded in the concrete structure 5 of the concrete slab, the through-reinforcement 7 is inserted into the mounting hole 6, and the insertion of the through-reinforcement 7 is designed so that the through-reinforcement 7 can be displaced to a predetermined degree with respect to the mounting hole 6.
It should be noted that the specified degree of displacement, in the actual design, can be designed according to the roughness of the contact material of the through-bars 7 and the mounting holes 6, the size of the gap between the through-bars 7 and the mounting holes, the size of the rigidity (or, the size of the elastic modulus) of the through-bars 7, the weight of the through-bars 7 themselves, and the like, by the conventional design ability of those skilled in the art.
It should be understood that the specified degree of displacement is the displacement produced under the specific conditions of tension in the steel beam and compression in the concrete slab, and does not mean that the through reinforcement 7 produces significant movement when installed in the installation hole 6, which clearly indicates that the installation of the through reinforcement 7 is loose and not allowed.
The mounting hole 6 may be L-shaped, and the through reinforcement 7 is located at one of the straight sections of the L-shape, i.e. the horizontal section shown in fig. 2 and 3.
The through reinforcement 7 is coated with a filling material 8 at the position of the mounting hole 6, the filling material fills the entire horizontal section of the mounting hole 6 (in the implementation mode that the mounting hole 6 is L-shaped), the filling material 8 can be plastic, foam or rubber, and the filling material 8 is used for eliminating a gap between the through reinforcement 7 and the inner wall of the mounting hole 6 to prevent the concrete 5 from pouring in. The filler material 8 is a low modulus material such that a non-shear effect is achieved, allowing the through-reinforcement 7 to slide horizontally within the mounting hole 6, as shown in figures 2 and 3.
The design of the open steel plate 9 will avoid the complete disengagement of the through-reinforcement 7 from the vertical restraint of the steel plate when the amount of relative slippage between the concrete slab and the steel beam is large. The mounting holes 6 are arranged at certain intervals to ensure the vertical anti-pulling connection rigidity of the test piece.
The connecting piece has weak longitudinal rigidity, and hardly has shearing resistance in the range of the horizontal section of the mounting hole 6, so that the concrete slab and the steel beam can freely slide in a certain longitudinal range, and the prestress application effect can be improved. And the opening steel plate makes the connecting piece possess stronger resistance to plucking to the vertical restraint effect that runs through the reinforcing bar, can resist the vertical separation of concrete slab and girder steel and play the effect with lifting for concrete slab and shape girder steel have stronger wholeness.
The construction method comprises the following steps:
the application relates to a construction method of a uplift-resistant and non-shear-resistant open type steel-concrete composite beam connecting piece, which comprises the following steps: prefabricating an opening steel plate 9 in a factory, excavating positive and negative mounting holes according to design requirements, welding the opening steel plate on a flange plate 1 on a steel beam, pasting a low elastic modulus material 8 on the closed end part of the horizontal section of the mounting hole, and then transporting the steel beam to a construction site. Placing transverse through reinforcing steel bars 7, adhering low elastic modulus materials 8 at the end part of the horizontal section opening of the mounting hole, then binding concrete slab reinforcing steel bars 4, and pouring bridge deck slab concrete, thereby forming the connecting piece which is anti-pulling and not anti-shearing as shown in figures 1-3.
The connecting piece can be used for the hogging moment area of the steel-concrete composite beam. The tensile stress borne by the concrete slab in the hogging moment area can be reduced, the prestress application effect can be improved without shear resistance measures, the long-term stress performance of the concrete slab is improved, and meanwhile, the connecting piece has vertical pulling resistance and can resist the vertical separation and lifting of the concrete and the steel beam. Compared with the stud, the steel plate connecting piece is convenient to weld in a factory. The steel sheet open design, resistance to plucking through reinforcement can directly be placed at L shaped hole downtheholely, simple structure, construction convenience.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application.
Claims (6)
1. A connecting member of a uplift-resistant and non-shearing-resistant open type steel-concrete composite beam, which is used for connecting a steel beam and a concrete slab filled with a concrete structure, the connecting member comprising:
the opening steel plate is used for being installed on the steel beam and provided with an installation hole;
and a through-bar embedded within the concrete structure of the slab, the through-bar being disposed within the mounting hole, the through-bar being configured to allow a specified degree of displacement of the through-bar relative to the mounting hole.
2. The connector of claim 1, wherein the mounting hole is L-shaped, and the through-reinforcing bar is located at one of the straight sections of the L-shape.
3. The connector according to claim 1, further comprising a filling material filled in a gap between an inner wall of the installation hole and an outer surface of the through-reinforcing bar.
4. The fitting according to claim 1, wherein said filler material is plastic, foam or rubber.
5. The connector of claim 1, wherein the open steel plate extends along a length of the steel beam.
6. The connector of claim 1, wherein the top of the mounting hole is flush with and communicates with the vertical top of the open steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210704763.9A CN114892503A (en) | 2022-06-21 | 2022-06-21 | Connecting piece of anti-pulling and non-shearing open-ended steel-concrete composite beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210704763.9A CN114892503A (en) | 2022-06-21 | 2022-06-21 | Connecting piece of anti-pulling and non-shearing open-ended steel-concrete composite beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114892503A true CN114892503A (en) | 2022-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210704763.9A Pending CN114892503A (en) | 2022-06-21 | 2022-06-21 | Connecting piece of anti-pulling and non-shearing open-ended steel-concrete composite beam |
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| CN (1) | CN114892503A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991318A (en) * | 2022-06-13 | 2022-09-02 | 中国化学工程第十一建设有限公司 | Connecting device, steel concrete structure and steel concrete structure installation method |
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|---|---|---|---|---|
| CN102359061A (en) * | 2011-09-22 | 2012-02-22 | 江苏省交通科学研究院股份有限公司 | Shear connector of waveform steel plate and concrete |
| CN106988200A (en) * | 2017-02-24 | 2017-07-28 | 南京航空航天大学 | Longitudinal direction not shearing resistance open pore steel plate anti-pulling connector and its construction method |
| CN209873546U (en) * | 2019-02-22 | 2019-12-31 | 华侨大学 | Steel-concrete connecting piece of welding nail and orifice plate combination |
| CN111877134A (en) * | 2020-06-19 | 2020-11-03 | 东南大学 | Perforated plate shear connector |
| CN112376386A (en) * | 2020-10-30 | 2021-02-19 | 东南大学 | Steel-concrete combined continuous beam and connecting piece and construction method of hogging moment area of steel-concrete combined continuous beam |
| CN113322785A (en) * | 2021-06-21 | 2021-08-31 | 华南理工大学 | Wide ladder-shaped cap-shaped connecting device and manufacturing method |
-
2022
- 2022-06-21 CN CN202210704763.9A patent/CN114892503A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359061A (en) * | 2011-09-22 | 2012-02-22 | 江苏省交通科学研究院股份有限公司 | Shear connector of waveform steel plate and concrete |
| US20150139719A1 (en) * | 2011-09-22 | 2015-05-21 | Jiangsu Transportation Research Institute Co., Ltd | Shear connector for corrugated sheet steel and concrete |
| CN106988200A (en) * | 2017-02-24 | 2017-07-28 | 南京航空航天大学 | Longitudinal direction not shearing resistance open pore steel plate anti-pulling connector and its construction method |
| CN209873546U (en) * | 2019-02-22 | 2019-12-31 | 华侨大学 | Steel-concrete connecting piece of welding nail and orifice plate combination |
| CN111877134A (en) * | 2020-06-19 | 2020-11-03 | 东南大学 | Perforated plate shear connector |
| CN112376386A (en) * | 2020-10-30 | 2021-02-19 | 东南大学 | Steel-concrete combined continuous beam and connecting piece and construction method of hogging moment area of steel-concrete combined continuous beam |
| CN113322785A (en) * | 2021-06-21 | 2021-08-31 | 华南理工大学 | Wide ladder-shaped cap-shaped connecting device and manufacturing method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991318A (en) * | 2022-06-13 | 2022-09-02 | 中国化学工程第十一建设有限公司 | Connecting device, steel concrete structure and steel concrete structure installation method |
| CN114991318B (en) * | 2022-06-13 | 2024-06-18 | 中国化学工程第十一建设有限公司 | Connecting device, steel concrete structure and steel concrete structure installation method |
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Application publication date: 20220812 |
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