CN110965648B - Shear connector structure of assembled steel-concrete combined structure - Google Patents
Shear connector structure of assembled steel-concrete combined structure Download PDFInfo
- Publication number
- CN110965648B CN110965648B CN201911320453.1A CN201911320453A CN110965648B CN 110965648 B CN110965648 B CN 110965648B CN 201911320453 A CN201911320453 A CN 201911320453A CN 110965648 B CN110965648 B CN 110965648B
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- Prior art keywords
- steel
- concrete
- shear connector
- nut
- upper flange
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- 239000004567 concrete Substances 0.000 title claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 62
- 239000010959 steel Substances 0.000 claims abstract description 62
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000002131 composite material Substances 0.000 claims description 10
- 238000010276 construction Methods 0.000 abstract description 9
- 239000011178 precast concrete Substances 0.000 abstract description 7
- 238000010008 shearing Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005266 casting Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000004519 manufacturing process 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
- 238000003825 pressing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/388—Separate connecting elements
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention provides a shear connector structure of an assembled steel-concrete combined structure, which comprises a precast concrete panel and a steel beam, wherein the concrete panel is adhered to an upper flange plate of the steel beam; the prefabricated concrete panel is provided with a rear pouring hole in a penetrating manner along the thickness direction; the position of the upper flange plate corresponding to the rear pouring hole is provided with a shear connector; the shear connector comprises a screw, a nut, an upper steel ring, a lower steel ring and a spring; the spring is connected between the two steel rings, the screw rod passes through the upper steel ring and the lower steel ring, and the lower end of the screw rod passes through the upper flange plate to be connected with the nut. The shear connector structure adopts a bolt connection mode, and is convenient to detach. The screw is fixed through the fixing piece and the nut, so that the shearing piece is convenient and efficient to operate in the combined structure construction application, and the construction quality is guaranteed. And secondly, the pre-tightening force is applied to the nut, so that the concrete and the steel beam are in a pre-tightening state, the interface stress effect of the combined structure is improved, and the overall stress performance of the steel-concrete structure is improved.
Description
Technical Field
The invention relates to the field of civil engineering and high-rise building engineering, in particular to a shear connector structure of two assembly type steel-concrete combined structures.
Background
In recent years, steel-concrete composite structures have been widely used in China, for example, in composite beams, composite columns and composite walls of high-rise buildings, and particularly in bridges of civil engineering, such as harbor Zhuhai and Macao bridges. The combined structure fully exerts the physical and stress performances of steel and concrete, has light dead weight, increases the use clearance, has short construction period and has good earthquake resistance. The connection between the steel beam and the concrete slab mainly resists the sliding and lifting of the interface through the shear connector, so that the steel beam and the concrete slab form a combined mechanism and work cooperatively, and the shear connector plays a role in closing the combined structure.
However, the prior art has obvious defects: the shear member bolts commonly used in the prior combined beam bridge structure are easy to generate fatigue fracture under the action of vehicle load; the concrete bridge deck is easy to generate fatigue damage under the action of fatigue load of vehicles, so that the service life of bridge deck components is often lower than the design service life of the full-bridge structure, and the full life cycle cost of the bridge is increased. Therefore, a shear connector convenient to construct and operate is needed, and when the concrete panel is damaged, only the shear connector is required to be disassembled to replace the bridge panel, so that the engineering cost is saved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide two novel bolt connection structures of a shearing member which are convenient to assemble and disassemble and are adopted for prolonging the whole cycle life of a combined structure.
In order to solve the technical problems, the invention provides a shear connector structure of an assembled steel-concrete combined structure, which comprises a precast concrete panel and a steel beam, wherein the concrete panel is adhered to an upper flange plate of the steel beam; the prefabricated concrete panel is provided with a rear pouring hole in a penetrating manner along the thickness direction; a shear connector is arranged at the position of the upper flange plate corresponding to the rear pouring hole;
The shear connector comprises a screw, a nut, an upper steel ring, a lower steel ring and a spring; the spring is connected between the two steel rings, the screw rod penetrates through the upper steel ring and the lower steel ring, and the lower end of the screw rod penetrates through the upper flange plate to be connected with the nut.
In a preferred embodiment: and concrete is poured in the rear pouring hole.
In a preferred embodiment: and the bolts apply normal precompression to a steel-concrete combined structure interface formed by the concrete panel and the upper flange plate through nuts.
In a preferred embodiment: the spring is held in a compressed state.
The invention also provides a shear connector structure of the assembled steel-concrete combined structure, which comprises a prefabricated concrete panel and a steel beam, wherein the concrete panel is adhered to an upper flange plate of the steel beam; the prefabricated concrete panel is provided with a rear pouring hole in a penetrating manner along the thickness direction; a shear connector is arranged at the position of the upper flange plate corresponding to the rear pouring hole;
The shear force connecting piece includes screw rod, nut, upper and lower two steel rings, left and right two flexible pipe, two flexible pipes are connected respectively between two steel rings, the screw rod passes two steel rings about to its lower extreme pass the upper flange plate with the nut is connected.
In a preferred embodiment: and concrete is poured in the rear pouring hole.
In a preferred embodiment: and the bolts apply normal precompression to a steel-concrete combined structure interface formed by the concrete panel and the upper flange plate through nuts.
In a preferred embodiment: the elastic telescopic pipe keeps the compression state, and the beneficial effects of the invention are as follows:
The shear connector structure at the interface of the steel-concrete composite structure adopts a bolt connection mode, and is convenient to detach. The screw is fixed through the first fixing piece, the second fixing piece and the nut, so that the shearing force piece is convenient and fast to operate in the construction application of the combined structure, high efficiency and construction quality guarantee. And secondly, the pre-tightening force is applied to the nut, so that the concrete and the steel beam are in a pre-tightening state, the interface stress effect of the combined structure is improved, and the overall stress performance of the steel-concrete structure is improved.
Drawings
FIG. 1 is a schematic view of a preformed hole in the upper flange of a steel beam;
FIG. 2 is a schematic view of the assembly of a steel beam with a precast concrete deck (no casting in the post-cast hole);
FIG. 3 is a schematic view of a steel-concrete composite structure mounting shear connector bolt;
FIG. 4 is a schematic structural view of a steel-hybrid composite structure;
FIG. 5 is a schematic view of a fastener;
FIG. 6 is a schematic view of a bolt construction;
FIG. 7 is a schematic view of a bolt structure assembled on a steel beam;
FIG. 8 is a second schematic view of a fastener;
FIG. 9 is a schematic diagram of a second bolt construction;
FIG. 10 is a schematic diagram of the assembly of a second bolt structure on a steel beam;
In the figure: 10 is a steel beam, 11 is an upper flange plate, and 12 is an upper flange preformed hole; 20 is a precast concrete panel, 21 is a post-cast hole; 30 is a shear connector; 40 is cast-in-place concrete; 50 is steel ring 1, 51 is spring 1;60 is screw 1, 61 is nut 1;80 is steel ring 2, 81 is round steel pipe, 82 is round steel sleeve, 83 is spring 2;90 is a screw 2 and 91 is a nut 2.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The invention aims to solve the defects of the steel-concrete combined structural member in the prior art, provides the shear connector structure of the assembled steel-concrete combined structure, improves the whole cycle service life, the construction efficiency and the quality of the combined structure, and simultaneously improves the stress performance of the structure, and has reasonable structural design, simple structure, superior stress performance and convenient construction.
As shown in fig. 1-10, a shear connector structure of a fabricated steel-hybrid composite structure. Fig. 1 and 2 include a steel beam 10, a precast concrete panel 20, and an upper flange plate 11 of the steel beam 10 bonded to the precast concrete panel 20; the shear connector 30 is installed at the position of the upper flange plate 11 corresponding to the rear casting hole 21 in fig. 3; concrete 40 is poured into the rear casting hole 21, and a schematic view of the assembled steel-concrete composite structure is shown in fig. 4.
The shear connector is particularly shown in figures 5-10. The bolt structure one shown in fig. 6 is specifically composed of a fixing member one, a screw 60 and a nut 61. As shown in FIG. 5, the first fixing member is composed of an upper steel ring 50, a lower steel ring 50 and a spring 51, wherein the spring 50 is connected between the two steel rings 50.
The screw 60 is sleeved into the fixing piece and passes through the upper flange 11 of the steel beam again, the tail of the screw 60 is fastened on the screw by a nut 61, and a pretightening force is applied to the screw by a torque wrench, so that the spring 51 is kept in a compressed state.
Similarly, as a simple alternative to the second bolt structure shown in fig. 6, the second bolt structure is specifically composed of a second fixing member, a screw 90 and a nut 91. As shown in FIG. 8, the second fixing part consists of an upper steel ring 80, a lower steel ring 80, a left elastic telescopic pipe and a right elastic telescopic pipe. Two elastic telescopic tubes are respectively connected between the two steel rings 80.
The elastic telescopic tube comprises a round steel tube 81, a round steel sleeve 82 and a spring 83. The round steel pipes 81 are sleeved in two round steel sleeves 82, the round steel sleeves 82 are hollow, and the same springs 83 are respectively arranged inside the round steel sleeves 82.
The screw 90 is sleeved into the second fixing piece and then passes through the upper flange 12 of the steel beam, the tail of the screw is fastened by the nut 91, and then a pretightening force is applied by a torque wrench, so that the spring 83 is kept in a compressed state.
The corresponding forms in the production method process are as follows:
as shown in fig. 1, screw holes 12 are reserved in an upper flange plate 11 of a steel beam 10, and the screw holes 12 are arranged in proper rows along the longitudinal direction of the steel beam 10 according to the interval meeting the design requirement, so that the security steel beam 10 is hoisted.
As shown in fig. 2, the precast concrete deck 20 is combined with the steel girder by the interfacial adhesive conforming to the design requirements, leaving the post-cast holes 21 without casting.
As shown in fig. 3, the screws of the shear connector 30 are of a strength and size that meets the shear load capacity requirements. The screw rod is sleeved into the fixing piece and then passes through the reserved hole 12 of the steel beam 10, and the tail part of the screw rod is fastened by the nut.
As shown in fig. 4, after the shrinkage-free self-flowing compact high-strength concrete 40 is poured in the rear pouring hole 21, after the concrete 40 reaches the design strength, the design torque is applied to the nut by the torque wrench, so that the interface between the concrete 40 panel and the steel beam 10 is in a pre-pressing state.
The above examples are only for illustrating the present invention and are not to be construed as limiting the invention. Variations, modifications, etc. of the above-described embodiments are intended to fall within the scope of the claims of the present invention, as long as they are in accordance with the technical spirit of the present invention.
Claims (1)
1. The shear connector structure of the assembled steel-concrete composite structure is characterized by comprising a prefabricated concrete panel and a steel beam, wherein the concrete panel is adhered to an upper flange plate of the steel beam; the prefabricated concrete panel is provided with a rear pouring hole in a penetrating manner along the thickness direction; a shear connector is arranged at the position of the upper flange plate corresponding to the rear pouring hole;
The shear connector comprises a screw rod, a nut, an upper steel ring, a lower steel ring, a left elastic telescopic pipe and a right elastic telescopic pipe, wherein the two elastic telescopic pipes are respectively connected between the two steel rings, the screw rod penetrates through the upper steel ring and the lower steel ring, and the lower end of the screw rod penetrates through an upper flange plate to be connected with the nut; concrete is poured in the rear pouring hole; the bolts apply normal precompression to a steel-concrete combined structure interface formed by the concrete panel and the upper flange plate through nuts; the elastic telescopic tube is kept in a compressed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911320453.1A CN110965648B (en) | 2019-12-19 | 2019-12-19 | Shear connector structure of assembled steel-concrete combined structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911320453.1A CN110965648B (en) | 2019-12-19 | 2019-12-19 | Shear connector structure of assembled steel-concrete combined structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110965648A CN110965648A (en) | 2020-04-07 |
| CN110965648B true CN110965648B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911320453.1A Active CN110965648B (en) | 2019-12-19 | 2019-12-19 | Shear connector structure of assembled steel-concrete combined structure |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080103678A (en) * | 2007-05-25 | 2008-11-28 | 삼표이앤씨 주식회사 | Method for composite girder and bridge construction method composite girder |
| CN203755452U (en) * | 2014-03-12 | 2014-08-06 | 南京工业大学 | Bolt shear connector |
| CN207609191U (en) * | 2017-11-29 | 2018-07-13 | 中建远南集团有限公司 | A kind of column angle protective device of detachable concrete column |
| CN108330806A (en) * | 2018-03-28 | 2018-07-27 | 华侨大学 | The steel-that compoiste adhering anchors shear connections knot mixes combined beam structure and production method |
| CN212453089U (en) * | 2019-12-19 | 2021-02-02 | 华侨大学 | Shear connector structure of assembled steel-concrete composite structure |
-
2019
- 2019-12-19 CN CN201911320453.1A patent/CN110965648B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080103678A (en) * | 2007-05-25 | 2008-11-28 | 삼표이앤씨 주식회사 | Method for composite girder and bridge construction method composite girder |
| CN203755452U (en) * | 2014-03-12 | 2014-08-06 | 南京工业大学 | Bolt shear connector |
| CN207609191U (en) * | 2017-11-29 | 2018-07-13 | 中建远南集团有限公司 | A kind of column angle protective device of detachable concrete column |
| CN108330806A (en) * | 2018-03-28 | 2018-07-27 | 华侨大学 | The steel-that compoiste adhering anchors shear connections knot mixes combined beam structure and production method |
| CN212453089U (en) * | 2019-12-19 | 2021-02-02 | 华侨大学 | Shear connector structure of assembled steel-concrete composite structure |
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| Publication number | Publication date |
|---|---|
| CN110965648A (en) | 2020-04-07 |
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