CN110656573A - Shear connector for glue-pouring high-strength bolt - Google Patents

Shear connector for glue-pouring high-strength bolt Download PDF

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Publication number
CN110656573A
CN110656573A CN201910993018.9A CN201910993018A CN110656573A CN 110656573 A CN110656573 A CN 110656573A CN 201910993018 A CN201910993018 A CN 201910993018A CN 110656573 A CN110656573 A CN 110656573A
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CN
China
Prior art keywords
panel
holes
bolt
glue
main
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910993018.9A
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Chinese (zh)
Inventor
陈炳聪
张俊平
张玉杰
刘爱荣
周危
党李琰
房宾
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Guangzhou University
Original Assignee
Guangzhou University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou University filed Critical Guangzhou University
Priority to CN201910993018.9A priority Critical patent/CN110656573A/en
Publication of CN110656573A publication Critical patent/CN110656573A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general

Abstract

The invention relates to the technical field of building component connection and discloses a glue-pouring high-strength bolt shear connector. The glue-pouring high-strength bolt shear connector comprises a panel and a plurality of main beams which are arranged on the lower side of the panel in parallel, bolt through holes used for being fixed with the panel are respectively formed in each main beam, through holes communicated with the bolt through holes in a one-to-one correspondence mode are formed in the panel, grouting holes are formed in the outer side of the through holes of the panel, and the grouting holes are communicated with the through holes. The working difficulty of transportation and hoisting is obviously reduced; the panels are connected with the main beam through bolts, secondary concrete cast-in-place is not needed, the installation and construction are easy, and the construction period is obviously shortened. The gap at the joint of the bolt and the main beam and the panel is filled with high-performance chemical steel-pasted glue through the grouting hole to achieve compactness, so that the working performance of the bolt and the main beam and the working performance of the panel are better exerted. The rubber packing ring is laid to panel and girder junction and prevents to take place the slurry seepage, and further increase is closely knit. Lay the rubber packing ring between the adjacent panel, prevented that chemical rubberizing from revealing.

Description

Shear connector for glue-pouring high-strength bolt
Technical Field
The invention belongs to the technical field of building component connection, and particularly relates to a glue-pouring high-strength bolt shear connector.
Background
With the continuous propulsion of novel urbanization processes and the proposal of a recyclable structure concept, a strong-force sustainable and low-carbon bridge structure becomes an important direction for the development of the current engineering structure. At present, a large number of medium and small span bridges have been used for 30-40 years, and due to the long-term action of overloaded vehicles, lack of maintenance, low early design load and the like, the bridge is seriously damaged, the service life is greatly shortened, and the replacement is urgently needed. The combined recyclable bridge structure is produced at the same time. The combined recyclable bridge structure has the characteristics of high structural strength, strong yield resistance and small stress deformation of the traditional single bridge structure, has the advantages of easiness in construction, good economic benefit, recyclability and the like, can give full play to the performance advantages of the combined structure, improves the quality of the highway bridge, conforms to the development trend of green, energy-saving and environmental protection, helps to promote the transformation and upgrading of highway construction, and is the mainstream direction of the development of the current bridge structure.
The steel-concrete composite beam is a common composite beam, however, the traditional steel-concrete composite beam needs to be cast in place, the assembly degree is low, and the cast-in-place construction is expensive and labor-intensive, and is not beneficial to construction and maintenance. The beam for cast-in-place construction or post-cast construction needs on-site maintenance and can be put into use only when the beam reaches the age of 28 days, so that the maintenance cost is high, the quality is poor, and the construction period is long. The traditional composite beam generally adopts studs or steel plates with holes as shear connectors and is welded on an upper wing plate of an I-beam. However, such welded joints have poor fatigue properties and are prone to fatigue fracture. The main disadvantages of using inserts or through bolts in new bridge construction and in whole bridge or deck replacement applications are the high tolerance requirements required to ensure that the inserts or holes in the prefabricated panels are aligned with the holes in the flanges of the beam and that the panels are placed horizontally on the beam, thus adding difficulty to later replacement of the deck. The general bolt type assembly type steel-concrete combined beam has the problems of unreliable joint surface connection, large bolt slippage and lower structural rigidity, and has the defects of complex manufacturing process, inconvenient assembly and construction, high manufacturing cost and the like of a concrete slab due to high bolt consumption and high requirement on the precision of a bolt hole of the concrete slab, particularly the slab.
Disclosure of Invention
In order to solve the technical problems, the invention provides a glue-pouring high-strength bolt shear connecting piece, which aims to solve the technical problems of inconvenience in construction, high construction cost and long construction period of the shear connecting piece in the prior art.
The technical scheme of the glue-pouring high-strength bolt shear connector provided by the invention is as follows:
the utility model provides a grout high strength bolt shear force connecting piece includes the panel and a plurality of parallel arrangement at the girder of panel downside, each be equipped with respectively on the girder and be used for the bolt perforation fixed with the panel, be equipped with the through-hole that communicates with each bolt perforation one-to-one on the panel, the panel is equipped with the grout hole in the outside of through-hole, the grout hole is linked together with the through-hole.
As a further improvement to the above technical solution, the number of the bolt through holes is four, the four bolt through holes are respectively located at four corners of the main beam, the number of the grouting holes is two, the two grouting holes are located inside the four through holes corresponding to the bolt through holes, and each grouting hole is communicated with the two through holes.
As a further improvement to the technical scheme, the grouting holes penetrate through the upper side and the lower side of the panel, and the grouting holes are horizontally communicated with the through holes.
As a further improvement to the technical scheme, a rubber gasket is arranged between the main beam and the panel.
As a further improvement to the technical scheme, the main beam is an I-shaped steel beam or a steel box beam or a steel plate.
As a further improvement to the technical scheme, a counter bore structure for the nut to enter is arranged on the upper side of the through hole.
The invention provides a glue-pouring high-strength bolt shear connector, which has the beneficial effects that:
the glue-pouring high-strength bolt shear connector provided by the invention has the advantages that the working difficulty of transportation and hoisting is obviously reduced; the panels are connected with the main beam through bolts, secondary concrete cast-in-place is not needed, the installation and construction are easy, and the construction period is obviously shortened. The gap at the joint of the bolt and the main beam and the panel is filled with high-performance chemical steel-pasted glue through a grouting hole reserved on the panel in advance to achieve compactness, so that the working performance of the bolt and the main beam and the working performance of the panel can be better exerted. The rubber packing ring is laid to panel and girder junction and prevents to take place the slurry seepage, further increases closely knit. Lay the rubber packing ring between the adjacent panel, prevented that chemical rubberizing from revealing.
The girder is taken respectively to the both sides of panel to form the type structure through high strength bolted connection, its mechanical model can simplify to the statically indeterminate simple beam system that both ends are articulated, when the panel bore the equipartition load, the board body transversely is bent its crack and must appear at the bottom of the board, is convenient for early discovery early processing, has avoided the girder to take place the brittle failure.
Drawings
FIG. 1 is a schematic cross-sectional view of a bridge using the encapsulated high-strength bolted shear connection of the present invention;
FIG. 2 is a cross-sectional view of a deck and main beam of the bridge of FIG. 1;
FIG. 3 is a top view of the bridge of FIG. 1;
FIG. 4 is a side view of the bridge of FIG. 1;
FIG. 5 is a structural relationship diagram of the present invention;
FIG. 6 is a partial schematic view of the glue filled high strength bolt shear connection of the present invention;
FIG. 7 is a comparison of performance before and after grouting of a test piece;
in the figure: 1-an i-section steel beam; 2-concrete panels; 3-a bolt; 4-asphalt concrete pavement layer; 5-railing; 6-a first rubber gasket; 7-a second rubber gasket; 8-bridge pier; 9-grouting holes; 10-horizontal connections; 11-chemical steel paste; 12-stud slippage load relationship curve; 13-grouting bolt slip load relation curve; 14-groutless bolt slip load relationship curve.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The embodiment of the glue-filled high-strength bolt shear connector disclosed by the invention comprises a panel and a plurality of main beams which are arranged in parallel on the lower side of the panel, as shown in fig. 1 to 6.
In this embodiment, the girder is i-shaped steel beam 1, and the panel is prefabricated concrete panel 2. In other embodiments, the main beam may also be a steel box beam or a steel plate. The upside of I-shaped steel beam 1 contacts with the concrete panel 2 downside, and the downside of I-shaped steel beam 1 contacts with the support on pier 8. The four corners of each I-shaped steel beam 1 are provided with bolt through holes penetrating through the upper side and the lower side, the concrete panel 2 is provided with through holes correspondingly penetrating through the bolt through holes, and bolts 3 are arranged in the bolt through holes and the through holes in a penetrating mode. The upper side of the through hole has a counter bore structure for the entry of a nut for connection to the upper end of the bolt 3.
In this embodiment, the hole diameters of the bolt through hole and the through hole are the same, and the hole diameters of the bolt through hole and the through hole are larger than the diameter of the bolt 3. Concrete panel 2 has the grout hole 9 that runs through concrete panel 2 upper and lower both sides in the outside of through-hole, and grout hole 9 includes the horizontal intercommunication portion 10 that is linked together with the through-hole, and chemistry pastes steel glue 11 and enters into to the through-hole through grout hole 9 in, and it is sealed to fill up the clearance between bolt 3 and the bolt perforation, makes bolt 3 and I-shaped steel beam 1 and concrete panel 2's junction more closely knit. The concrete panel 2 is provided with four through holes which are communicated with one of the I-shaped steel beams 1 in a one-to-one correspondence mode, two grouting holes 9 are formed in the four communication holes, and the two grouting holes 9 are arranged at intervals in the front-back direction. The grouting holes 9 on the front side are communicated with the two through holes on the front side, and the grouting holes 9 on the rear side are communicated with the two through holes on the rear side.
The through holes and the grouting holes 9 on the concrete panel 2 are all prefabricated, the concrete panel 2 is arranged on the upper side of the I-shaped steel beam 1 during use, and the through holes on the concrete panel 2 are communicated with the bolt through holes on the I-shaped steel beam 1 in a one-to-one correspondence mode. In order to prevent the chemical steel-pasting glue 11 from leaking from the contact part of the concrete panel 2 and the I-shaped steel beam 1. And a second rubber gasket 7 is arranged between the concrete panel 2 and the I-shaped steel beam 1 and used for preventing the poured chemical steel-pasting glue 11 from leaking. A first rubber gasket 6 is arranged between two adjacent concrete panels 2 in the front-rear direction and used for preventing the poured chemical steel-pasted glue 11 from leaking.
In this embodiment, the upper side of the concrete panel 2 is provided with an asphalt concrete pavement layer 4 for enhancing the flatness of the bridge deck. The left end and the right end of the concrete panel 2 are respectively provided with a railing 5 for enhancing the safety of the bridge.
The glue-pouring high-strength bolt shear connector can be used in bridges and houses. The present embodiment takes a bridge as an example, and describes a construction method of the glue-pouring high-strength bolt shear connector of the present invention. The bridge includes a plurality of piers 8, and a plurality of piers 8 are arranged along fore-and-aft direction interval. A plurality of main beams are erected between two adjacent piers 8 and arranged in parallel at intervals in the left-right direction. During construction, the I-shaped steel beam 1 and the concrete panel 2 with the second rubber gasket 7 on the lower side are prefabricated in a factory, and after the pier 8 is in place, the pier can be transported to a construction site to be ready for installation. When the bridge is installed on site, the I-shaped steel beam 1 is firstly hoisted to be positioned on the support on the bridge pier 8, then the concrete panel 2 is hoisted to be positioned on the I-shaped steel beam 1, and the through holes of the concrete panel 2 are communicated with the bolt through holes of the I-shaped steel beam 1 in a one-to-one correspondence mode. The bolt 3 is installed and applied to 30% of the design tightening force by a torque wrench, and the second rubber washer 7 is compressed due to the structural self-weight and the pre-tightening force. And repeating the steps, and installing all the I-shaped steel beams 1 and the panels. And pressure grouting is carried out on all grouting holes 9 to enable the bolts 3 and the bolt through holes, the concrete panel 2 and the I-shaped steel beam 1 and the concrete panel 2 to be compact. The torque wrench is again used to apply 100% of the design tightening force to all bolts 3, while the slurry is further injected into the void. And finishing the bridge deck pavement.
According to the invention, the chemical steel-sticking glue 11 is poured into the grouting hole 9, so that the space between the bolt 3 and the bolt through hole, the space between the concrete panel 2 and the I-shaped steel beam 1, and the space between the concrete panel 2 and the concrete panel 2 are compacted. In order to verify the fixing effect of the structure, the present embodiment was subjected to a simulation experiment. 5 groups of 9 test piece steel-concrete test pieces in total are manufactured, wherein the test pieces comprise a stud connecting piece 1 group, an un-grouted bolt 3 type test piece 2 group and a post-grouted bolt 3 type test piece 2 group. All test pieces were tested using a 2000kN universal tester for MTS.
The experimental results are shown in fig. 7, where 12 represents a pin slip load relationship curve, 13 represents a grouted bolt 3 slip load relationship curve, and 14 represents an unlilled bolt 3 slip load relationship curve. The result shows that the total slippage of the grouted test piece is greatly smaller than that of the grouted test piece, the sudden slippage step is eliminated, and the overall working performance is obviously better; compared with a stud connecting piece test piece, the test piece after grouting not only has obviously smaller initial slippage, but also has better ductility. In summary, the performance of the slippage of the grouted test piece is close to that of the stud connecting piece, the problems of unreliable connection and lower structural rigidity of the grouted test piece can be solved, and the bolt 3 structure has the assembling and disassembling performance.
The transportation and hoisting work difficulty of the glue-pouring high-strength bolt shear connector is obviously reduced; the concrete panel 2 is connected with the I-shaped steel beam 1 through the bolts 3, secondary concrete cast-in-place is not needed, the installation and construction are easy, and the construction period is obviously shortened. The gap at the joint of the bolt 3 and the I-shaped steel beam 1 and the concrete panel 2 is filled with high-performance chemical steel-pasting glue 11 through a grouting hole 9 reserved on the concrete panel 2 in advance to achieve compactness, so that the working performance of the bolt and the concrete panel can be better exerted. The rubber packing ring is laid at the joint of the concrete panel 2 and the I-shaped steel beam 1 to prevent slurry leakage, so that the density is further increased. And rubber gaskets are paved between the adjacent concrete panels 2 to fully achieve the compactness.
The two sides of the concrete panel 2 are respectively lapped on the I-shaped steel beam 1 and are connected through the high-strength bolts 3 to form a forming structure, a mechanical model of the concrete panel can be simplified into a one-time statically indeterminate simply-supported beam system hinged at two ends, when the concrete panel 2 bears uniform load, the plate body is transversely bent, cracks of the plate body inevitably appear at the bottom of the plate, early discovery and early treatment are facilitated, and brittle failure of the I-shaped steel beam 1 is avoided.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims (6)

1. The utility model provides a encapsulating high strength bolt shear connector which characterized in that: including panel and a plurality of parallel arrangement at the girder of panel downside, each be equipped with respectively on the girder and be used for the bolt perforation fixed with the panel, be equipped with the through-hole that communicates with each bolt perforation one-to-one on the panel, the panel is equipped with the grout hole in the outside of through-hole, the grout hole is linked together with the through-hole.
2. The glue filled high-strength bolt shear connector according to claim 1, characterized in that: the bolt perforation has four, and four bolt perforations are located the four corners department of girder respectively, the grout hole has two, and two grout holes are located inside four through-holes that correspond with the bolt perforation, and every grout hole is linked together with two through-holes.
3. The glue filled high-strength bolt shear connector according to claim 1 or 2, characterized in that: the grouting holes penetrate through the upper side and the lower side of the panel, and the grouting holes are horizontally communicated with the through holes.
4. The glue filled high-strength bolt shear connector according to claim 1 or 2, characterized in that: and a rubber gasket is arranged between the main beam and the panel.
5. The glue filled high-strength bolt shear connector according to claim 1 or 2, characterized in that: the main beam is an I-shaped steel beam or a steel box beam or a steel plate.
6. The glue filled high-strength bolt shear connector according to claim 1 or 2, characterized in that: and a counter bore structure for the nut to enter is arranged on the upper side of the through hole.
CN201910993018.9A 2019-10-18 2019-10-18 Shear connector for glue-pouring high-strength bolt Pending CN110656573A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910993018.9A CN110656573A (en) 2019-10-18 2019-10-18 Shear connector for glue-pouring high-strength bolt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910993018.9A CN110656573A (en) 2019-10-18 2019-10-18 Shear connector for glue-pouring high-strength bolt

Publications (1)

Publication Number Publication Date
CN110656573A true CN110656573A (en) 2020-01-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910993018.9A Pending CN110656573A (en) 2019-10-18 2019-10-18 Shear connector for glue-pouring high-strength bolt

Country Status (1)

Country Link
CN (1) CN110656573A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111809498A (en) * 2020-06-10 2020-10-23 广州大学 Beam bridge combined structure of inverted groove-shaped steel-concrete bridge deck and construction method thereof
CN111809499A (en) * 2020-06-10 2020-10-23 广州大学 Combined beam for quickly installing upper structure of middle-small span beam bridge and construction method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111809498A (en) * 2020-06-10 2020-10-23 广州大学 Beam bridge combined structure of inverted groove-shaped steel-concrete bridge deck and construction method thereof
CN111809499A (en) * 2020-06-10 2020-10-23 广州大学 Combined beam for quickly installing upper structure of middle-small span beam bridge and construction method

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