CN113373792A - Connecting piece for steel-concrete combined structure and construction method - Google Patents
Connecting piece for steel-concrete combined structure and construction method Download PDFInfo
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- CN113373792A CN113373792A CN202110624693.1A CN202110624693A CN113373792A CN 113373792 A CN113373792 A CN 113373792A CN 202110624693 A CN202110624693 A CN 202110624693A CN 113373792 A CN113373792 A CN 113373792A
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- nut
- steel
- connecting piece
- elastic sleeve
- screw rod
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- 238000010276 construction Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 239000002131 composite material Substances 0.000 claims description 20
- 239000004570 mortar (masonry) Substances 0.000 claims description 11
- 239000000314 lubricant Substances 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004873 anchoring Methods 0.000 abstract description 4
- 238000011900 installation process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction 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
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a connecting piece for a steel-concrete combined structure and a construction method, wherein the connecting piece comprises a reverse taper nut, a screw, an elastic sleeve and a nut, wherein the minimum end of the reverse taper nut is connected with one end of the screw, the other end of the screw is connected with the nut, the elastic sleeve is sleeved on a rod body of the screw, and the elastic sleeve is positioned between the reverse taper nut and the nut; the elastic sleeve comprises an elastic steel plate, the elastic steel plate surrounds the rod body of the screw rod, and the elastic steel plate is wound at least three circles to form the sleeve. The tightening nut of the connecting piece enables the elastic sleeve to be pushed by the inverted cone nut in a squeezing mode, the diameter of the elastic sleeve is increased, an anchoring effect is generated, the inverted cone nut provides an anchoring effect, the vertical pulling force of the screw rod is increased through the elastic sleeve, certain pulling force is borne by the elastic sleeve, the pulling resistance of the connecting piece is improved, the shearing strength and the shearing rigidity of the connecting piece are improved through the screw rod, and the connecting piece has the pulling resistance and the shearing resistance.
Description
Technical Field
The invention relates to the technical field of combined connection among members in buildings, in particular to a connecting piece for a steel-concrete combined structure and a construction method.
Background
Steel-concrete composite beams are formed by connecting concrete slabs to their supporting structural steel beams using mechanical shear connectors. In the steel-concrete composite beam, a mechanical shear connector is arranged at the interface of a supporting steel beam and a plate to transmit shear force, so that the integral stress of the composite beam is ensured, the deformation of the concrete plate and the steel beam is consistent, and the purpose of a composite structure is achieved.
At present, the shear connecting piece most commonly adopted by the steel-concrete composite beam is a welded nail shear connecting piece with a head, the welded nail shear connecting piece with the head can play a role in vertical pulling resistance and a longitudinal shearing resistance, and can bear the longitudinal shearing force between the steel beam and the concrete slab interface while preventing the concrete slab and the steel beam from generating a vertical separation trend, so that the relative sliding of the steel beam and the concrete slab is limited, and the structure is ensured to be stressed cooperatively; in addition, the installation can be carried out by a quick welding method. However, from the perspective of sustainable development, the structure is required to be detachable and recyclable at the end of its service life or when damaged, and the conventional stud-welded shear connector combination beam is difficult to be conveniently and effectively detached and replaced in the detaching or modifying process.
Disclosure of Invention
In view of the technical problems in the prior art, it is an object of the present invention to provide a connector for a steel-concrete composite structure. The connector improves the overall shear strength and the anti-pulling performance of the steel-concrete structure.
Another object of the present invention is to provide a construction method for a steel-concrete composite structure. Only need be under the decking be under construction, it is little to the bridge floor traffic influence, promotes the efficiency of construction.
In order to achieve the purpose, the invention adopts the following technical scheme:
a connecting piece for a steel-concrete combined structure comprises a reverse taper nut, a screw rod, an elastic sleeve and a nut, wherein the minimum end of the reverse taper nut is connected with one end of the screw rod, the other end of the screw rod is connected with the nut, the elastic sleeve is sleeved on a rod body of the screw rod, and the elastic sleeve is positioned between the reverse taper nut and the nut; the elastic sleeve comprises an elastic steel plate, and the elastic steel plate is wound around the rod body of the screw rod for at least three circles.
Preferably, a gasket is arranged between the nut and the elastic sleeve, and the gasket is sleeved on the screw rod.
Preferably, the diameter of the largest end of the inverted cone nut is larger than the outer diameter of the elastic sleeve.
Preferably, the cross section of the nut is a regular hexagon.
Preferably, the height of the screw is 140-160 mm, and the diameter of the screw is 8-12 mm.
Preferably, the outer diameter of the gasket is 18-22 mm, and the thickness of the gasket is 1.8-2.2 mm.
A steel-concrete combined structure comprises a connecting piece, mortar, a concrete block and a steel beam, wherein the connecting piece, the mortar, the concrete block and the steel beam are based on the above structure, one end of the connecting piece penetrates through the steel beam and is inserted into the concrete block, a nut at the other end of the connecting piece is abutted against the outer end of the steel beam, a hole is formed between the connecting piece and the concrete block as well as between the connecting piece and the steel beam, and the mortar is filled in the hole.
A construction method for realizing the steel-concrete composite structure comprises the following steps:
step S1, drilling holes in the structures of the steel beams and the concrete blocks;
step S2, pressing the connecting piece into the hole, screwing the nut of the connecting piece, and applying screw prestress;
and step S3, pouring mortar around the connecting piece and filling the hole.
Preferably, in step S2, the connector is pressed into the hole using a lubricant.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention relates to a connecting piece for a steel-concrete combined structure, wherein a nut is screwed on the connecting piece, so that an elastic sleeve is extruded and pushed by an inverted cone nut, the diameter of the elastic sleeve is increased to generate an anchoring effect, the inverted cone nut provides an anchoring effect, the vertical tensile force of a screw rod is increased by the elastic sleeve and bears a certain tensile force, the pulling resistance of the connecting piece is increased, the shearing strength and the shearing rigidity of the connecting piece are increased by the screw rod, and the connecting piece has the pulling resistance and the shearing resistance.
2. According to the connecting piece for the steel-concrete combined structure, the elastic sleeve of the connecting piece expands, the contact area between the elastic sleeve and the hole wall is increased, the pressure distribution inside the connecting piece is more uniform, and the problem of stress concentration of the connecting piece is solved.
3. The steel-concrete combined structure adopts the connecting piece to connect the steel beam and the concrete block, enhances the pulling resistance and the shearing resistance of the steel-concrete combined structure, and is simple to operate.
4. The construction method for the steel-concrete composite structure, provided by the invention, has the advantages that prestress is applied to the connecting piece, the friction force between the bridge deck and the steel beam is increased, and the bearing capacity and the structural ductility during shear connection are favorably improved.
5. The construction method for the steel-concrete combined structure only needs to construct below the bridge deck slab, and when the steel beam of the bridge deck slab is dismantled, the steel beam can be dismantled and replaced only by dismantling the nut, so that the influence on bridge deck traffic is small, the precision requirement of a rotary hole in the installation process becomes loose, and the construction efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of a connector for a steel-concrete composite structure according to the present invention.
Fig. 2 is a schematic cross-sectional view of an elastomeric bushing of the present invention.
FIG. 3 is a schematic view of the back-taper nut and screw connection of the present invention.
Fig. 4 is a schematic view of the nut of the present invention.
Fig. 5 is a schematic view of a gasket of the present invention.
Fig. 6 is a schematic view of a combined structure for steel-concrete of the present invention.
Wherein, 1 is the back taper nut, 2 is elastic sleeve, 3 is the screw rod, 4 is the gasket, 5 is the nut, 6 is the concrete piece, 7 is the girder steel, 8 is the mortar.
Detailed Description
The following describes the object of the present invention in further detail with reference to the drawings and specific examples, which are not repeated herein, but the embodiments of the present invention are not limited to the following examples.
As shown in fig. 1 to 6, a connecting member for a steel-concrete composite structure includes a reverse taper nut 1, a screw rod 3, an elastic sleeve 2 and a nut 5, wherein a minimum end of the reverse taper nut 1 is connected with one end of the screw rod 3, the other end of the screw rod 3 is connected with the nut 5, the elastic sleeve 2 is sleeved on a rod body of the screw rod 3, and the elastic sleeve 2 is located between the reverse taper nut 1 and the nut 5. This connecting piece is screwed up nut 5 and is made elastic sleeve 2 receive crowded the pushing of back taper nut 1, and the diameter increase of elastic sleeve 2 produces the anchor effect, and back taper nut 1 provides the anchor effect, and elastic sleeve 2 increases the vertical pulling force of screw rod 3, and bears certain pulling force, increases the resistance to plucking performance of connecting piece, and screw rod 3 has increased the shear strength and the shear rigidity of connecting piece, and the connecting piece possesses resistance to plucking and shear performance.
The elastic sleeve 2 comprises an elastic steel plate which surrounds the rod body of the screw rod 3 and is wound at least three times to form a sleeve. Elastic steel belongs to flexible material, has certain rate of expansion, when nut 5 was screwed up to back taper nut 1, has increased the area of contact of elastic sleeve 2 with the pore wall, and the inside pressure distribution of connecting piece is more even, has solved the problem of connecting piece stress concentration, increases the resistance to plucking performance of connecting piece.
A gasket 4 is arranged between the nut 5 and the elastic sleeve 2, and the gasket 4 is sleeved on the screw rod 3. This gasket 4 has increased the area of contact of nut 5 with girder steel 7, prevents that the surface of screw rod 3 and nut 5 from being worn out, can also prevent that nut 5 from producing the phenomenon that the mechanical strain takes place to become flexible.
The diameter of the maximum end of the inverted cone nut 1 is larger than the outer diameter of the elastic sleeve 2. The formation of back taper nut 1 and elastic sleeve 2 is long-pending poor, and the area of contact increase between back taper nut 1 and the concrete piece 6 to the pressure that dispersion concrete piece 6 brought forms curved atress portion between back taper nut 1 and the elastic sleeve 2, thereby increases frictional force between connecting piece and the concrete piece 6.
The cross section of the nut 5 is a regular hexagon. The hexagon is relatively stable relative to other triangles, quadrangles and pentagons, is favorable for being stressed evenly when screwed down, and is not easy to screw down corners.
The height of the screw rod 3 is 140-160 mm, and the diameter of the screw rod 3 is 8-12 mm. The height of the screw rod 3 in the embodiment is 150mm, so that the contact area of the screw rod 3 when the screw rod is connected with the steel beam 7 and the concrete 6 is ensured, and the diameter of the screw rod 3 in the embodiment is 10.5mm, so that the shearing resistance requirement of the screw rod 3 is met.
The outer diameter of the gasket 4 is 18-22 mm, and the thickness of the gasket 4 is 1.8-2.2 mm. The external diameter of gasket 4 is 20mm in this embodiment, and the thickness of gasket 4 is 2mm, and when girder steel 7 received the vehicle vibration, the thickness of gasket 4 and external diameter size satisfied when nut 5 is connected with girder steel 7, the phenomenon of mechanical strain can not appear.
The utility model provides a steel-concrete integrated configuration, includes based on foretell connecting piece, mortar 8, concrete piece 6 and girder steel 7, the one end of connecting piece is run through in girder steel 7 inserts concrete piece 6, the nut 5 of the other end of connecting piece offsets with the girder steel 7 outer end, be equipped with the hole between connecting piece and concrete piece 6 and the girder steel 7, pack mortar 8 in the hole. The steel beam 7 and the concrete block 6 are connected by adopting the connecting piece, so that the pulling resistance and the shearing resistance of the steel-concrete combined structure are enhanced, and the operation is simple.
A construction method for realizing the steel-concrete combined structure comprises the following steps:
step S1, drilling holes in the structures of the steel beams 7 and the concrete blocks 6;
step S2, pressing the connecting piece into the hole, screwing the nut 5 of the connecting piece, and applying the prestress of the screw rod 3;
and step S3, pouring mortar 8 around the connecting piece and filling the hole.
In step S2, the connecting member is pressed into the hole by using a lubricant, and the lubricant can allow the connecting member to be quickly pressed into the hole, thereby increasing the construction efficiency.
According to the construction method of the connecting piece, when the connecting piece is installed or disassembled and replaced, the elastic sleeve 2 and the screw rod 3 are temporarily fixed in the hole, construction is only needed below the bridge floor, traffic is not affected, the precision requirement of the rotary hole in the installation process becomes loose, the construction efficiency is increased, the steel beam 7 can be disassembled and replaced only by disassembling the nut 5, and the construction convenience is good.
The above-mentioned embodiments are preferred embodiments of the present invention, and the present invention is not limited thereto, and any other modifications or equivalent substitutions that do not depart from the technical spirit of the present invention are included in the scope of the present invention.
Claims (9)
1. A connector for a steel-concrete composite structure, characterized in that: the anti-theft nut comprises an inverted cone nut, a screw rod, an elastic sleeve and a nut, wherein the minimum end of the inverted cone nut is connected with one end of the screw rod, the other end of the screw rod is connected with the nut, the elastic sleeve is sleeved on a rod body of the screw rod, and the elastic sleeve is positioned between the inverted cone nut and the nut; the elastic sleeve comprises an elastic steel plate, and the elastic steel plate is wound around the rod body of the screw rod for at least three circles.
2. A connector for a steel-concrete composite structure according to claim 1, characterized in that: and a gasket is arranged between the nut and the elastic sleeve and is sleeved on the screw rod.
3. A connector for a steel-concrete composite structure according to claim 1, characterized in that: the diameter of the maximum end of the inverted cone nut is larger than the outer diameter of the elastic sleeve.
4. A connector for a steel-concrete composite structure according to claim 1, characterized in that: the cross section of the nut is in a regular hexagon shape.
5. A connector for a steel-concrete composite structure according to claim 1, characterized in that: the height of the screw is 140-160 mm, and the diameter of the screw is 8-12 mm.
6. A connector for a steel-concrete composite structure according to claim 2, characterized in that: the outer diameter of the gasket is 18-22 mm, and the thickness of the gasket is 1.8-2.2 mm.
7. A steel-concrete composite structure characterized by: the connecting piece, the mortar, the concrete block and the steel beam comprise any one of claims 1 to 6, one end of the connecting piece penetrates through the steel beam and is inserted into the concrete block, a nut at the other end of the connecting piece is abutted against the outer end of the steel beam, a gap is formed between the connecting piece and the concrete block and between the connecting piece and the steel beam, and the mortar is filled in the gap.
8. A construction method for realizing the steel-concrete composite structure of claim 7, comprising:
step S1, drilling holes in the structures of the steel beams and the concrete blocks;
step S2, pressing the connecting piece into the hole, screwing the nut of the connecting piece, and applying screw prestress;
and step S3, pouring mortar around the connecting piece and filling the hole.
9. A construction method for a steel-concrete composite structure according to claim 8, characterized in that: in step S2, the connector is pressed into the hole using a lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110624693.1A CN113373792A (en) | 2021-06-04 | 2021-06-04 | Connecting piece for steel-concrete combined structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110624693.1A CN113373792A (en) | 2021-06-04 | 2021-06-04 | Connecting piece for steel-concrete combined structure and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113373792A true CN113373792A (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110624693.1A Pending CN113373792A (en) | 2021-06-04 | 2021-06-04 | Connecting piece for steel-concrete combined structure and construction method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0503677A2 (en) * | 1991-03-14 | 1992-09-16 | MÄCHTLE GmbH | Heavy duty anchor |
| US5816759A (en) * | 1997-05-08 | 1998-10-06 | Illinois Tool Works Inc. | Expansion anchor and method therefor |
| CN101382161A (en) * | 2008-10-20 | 2009-03-11 | 徐庭中 | Expansion screw bolt convenient for disassembling |
| DE102011001894A1 (en) * | 2011-04-08 | 2012-10-11 | Fischerwerke Gmbh & Co. Kg | Method for producing expansion sleeve for anchorage in borehole at concrete, involves punching circular hole out of metal sheet, after bending sheet in tubular shape by stamping process |
| CN204755517U (en) * | 2015-06-15 | 2015-11-11 | 深圳市科源建设集团有限公司 | Expanding screw bolts |
| CN110284656A (en) * | 2019-08-05 | 2019-09-27 | 郑州大学 | A kind of full assembled steel concrete combination beam |
| CN209568570U (en) * | 2018-12-21 | 2019-11-01 | 刘祥锦 | A kind of assembly shear wall vertically stitches connection structure, connecting elements and linked system |
| CN216947804U (en) * | 2021-06-04 | 2022-07-12 | 华南理工大学 | Connecting piece for steel-concrete composite structure |
-
2021
- 2021-06-04 CN CN202110624693.1A patent/CN113373792A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0503677A2 (en) * | 1991-03-14 | 1992-09-16 | MÄCHTLE GmbH | Heavy duty anchor |
| US5816759A (en) * | 1997-05-08 | 1998-10-06 | Illinois Tool Works Inc. | Expansion anchor and method therefor |
| CN101382161A (en) * | 2008-10-20 | 2009-03-11 | 徐庭中 | Expansion screw bolt convenient for disassembling |
| DE102011001894A1 (en) * | 2011-04-08 | 2012-10-11 | Fischerwerke Gmbh & Co. Kg | Method for producing expansion sleeve for anchorage in borehole at concrete, involves punching circular hole out of metal sheet, after bending sheet in tubular shape by stamping process |
| CN204755517U (en) * | 2015-06-15 | 2015-11-11 | 深圳市科源建设集团有限公司 | Expanding screw bolts |
| CN209568570U (en) * | 2018-12-21 | 2019-11-01 | 刘祥锦 | A kind of assembly shear wall vertically stitches connection structure, connecting elements and linked system |
| CN110284656A (en) * | 2019-08-05 | 2019-09-27 | 郑州大学 | A kind of full assembled steel concrete combination beam |
| CN216947804U (en) * | 2021-06-04 | 2022-07-12 | 华南理工大学 | Connecting piece for steel-concrete composite structure |
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