CN105113712B - The construction method of GFRP steel high-strength concrete combination beams - Google Patents
The construction method of GFRP steel high-strength concrete combination beams Download PDFInfo
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- CN105113712B CN105113712B CN201510522401.8A CN201510522401A CN105113712B CN 105113712 B CN105113712 B CN 105113712B CN 201510522401 A CN201510522401 A CN 201510522401A CN 105113712 B CN105113712 B CN 105113712B
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Abstract
The invention discloses a kind of GFRP steel high-strength concrete combination beam and its construction method, wherein described GFRP steel high-strength concrete combination beam includes the compression beam body area being made up of concrete, the some welderings being embedded in advance along the compression beam body section length direction in concrete beam body are followed closely, the steel web fixed with the weldering nail welding, be arranged at steel web formation open-ended cavity in GFRP hollow pipes, and with the steel web welding, with the tension steel plate of closed cavity openend；Side wall of the outer wall of the GFRP hollow pipes near concrete beam body area, steel web or tension steel plate；The steel web is provided with kink near the one end in compression beam body area.Combination beam of the invention is internally provided with hollow cavity, and dead load is light, saves material, low cost；The steel web of both sides can weld other plates, easy to connect and very reliable；The present invention can give full play to the mechanical property of material, improve the bearing capacity of combination beam, construction safety.
Description
Technical field
The present invention relates to building element, the especially construction method of a kind of combination beam and combination beam.
Background technology
Combination beam be using various different materials be combined into by curved structural elements, the combination beam applied in existing engineering
Component is all steel-concrete composite beam component.Steel-concrete composite beam component can more sufficiently using the good of concrete
Compressive property and the good tensile property of steel, improve the bearing capacity and ductility of structure.As illustrated in figs. 1A and ib, it is conventional at present
Steel-concrete composite beam have two kinds：Shaped steel-concrete slab combination beam and shaped steel-Concrete Filled beam.
The content of the invention
Applicant has found after research：
Consider from the angle of stress and materials'use, both combination beams have following defect：Shaped steel-concrete slab group
Compression is typically born in the shaped steel top flange for closing beam, and plays and acted on compressive region concrete slab identical, and this part edge of a wing does not have
There is necessity of presence, cause the waste of steel；What shaped steel-concrete of the Concrete Filled beam in bottom bore is tension, by
It is very low in the tensile strength of concrete, in bearing load this part concrete due to bearing load cannot be played a part of, instead
And become the unnecessary load of structure, the overall performance of not only waste of materials, and influence structure.Consider from construction angle,
Traditional steel-concrete composite beam is in work progress there is still a need for setting up template, complex procedures, and beam-beam, beam-column piece
Connection load, it is unreliable.
Goal of the invention：One purpose is to provide a kind of GFRP- Steel HSC composite beams, is deposited with solving prior art
Above mentioned problem.Further objective is that providing the construction method of above-mentioned GFRP- Steel HSC composite beams.
Technical scheme：A kind of GFRP- Steel HSC composite beams, including the compression beam body area being made up of concrete, edge
The compression beam body section length direction is embedded in some welderings nail in concrete beam body in advance, the steel abdomen fixed with the weldering nail welding
Plate, is arranged at the GFRP hollow pipes in the open-ended cavity of steel web formation, and open with steel web welding, with closed cavity
The tension steel plate at mouth end；Side wall of the outer wall of the GFRP hollow pipes near concrete beam body area, steel web or tension steel plate；Institute
State steel web and the one end in compression beam body area is provided with kink.
In a further embodiment, GFRP- Steel HSC composite beams are with the connected mode of compoboard, steel abdomen
The kink of plate is welded and fixed by welding nail with profiled sheet.The connected mode of GFRP- Steel HSC composite beams and girder steel
For, ribbed stiffener is welded with the steel web, ribbed stiffener is bolted with connecting plate (8), and the other end of connecting plate passes through
Bolt is fixedly connected with girder steel.GFRP- Steel HSC composite beams are with the connected mode of gusset plate, the steel web end
Portion is provided with fanwise slit, is welded and fixed with gusset plate, and the tension steel plate is consolidated by way of groove welding with node plate weld
It is fixed.The concrete strength in the compression beam body area is not less than C40, and the tension steel plate and steel web use Q345.
Further, present invention also offers a kind of method for manufacturing above-mentioned GFRP- Steel HSC composite beams, bag
Include following steps：
Step 1. steel plate cutting stock and welding, control steel plate thickness deviation in ± 0.07mm, steel web top it is perpendicular
Straight deviation is less than 0.3mm, and the end of steel web offers fanwise slit；Tension steel plate and steel abdomen are welded by the way of groove welding
Plate, welds nail and steel web by the way of fusion welds；
Step 2. coats one layer of epoxy resin in the top surface of tension steel plate, and GFRP hollow pipes are inserted into the top of tension steel plate
Face；
Step 3. is welded steel web and gusset plate by butt weld after lifting is in place, tension steel plate and gusset plate
Connected by groove welding；
In GFRP hollow pipes upper surface casting concrete, maintenance is to fully hardened for step 4..
In above-mentioned preparation method, then the method also comprises the following steps the combination beam that is if desired connected with other beams：
Step 31. is connected combination beam and other beams：Other beams are directly welded on the steel web of combination beam, or
Ribbed stiffener is welded on steel web, is hinged with other beams by ribbed stiffener.
In above-mentioned preparation method, if floorboard uses compoboard, the method also comprises the following steps：
Profiled sheet is laid on the GFRP- steel-high-strength concrete group not poured after the completion of node installation for step 32.
Close on beam, profiled sheet and combination beam are connected by welding nail, combination beam and compoboard one-piece casting.
Beneficial effect：Combination beam of the invention is internally provided with hollow cavity, and dead load is light, saves material, low cost；
The steel web of both sides can weld other plates, easy to connect and very reliable；The present invention can fill the mechanical property of material
Distribution is waved, and improves the bearing capacity of combination beam, construction safety.
Brief description of the drawings
Fig. 1 a and Fig. 1 b are the structural representations of prior art.
Fig. 2 is the cross-sectional view of GFRP- Steel HSC composite beams.
Fig. 3 a and Fig. 3 b are the strain figures of the cross section of GFRP- Steel HSC composite beams.
Fig. 4 is the connection diagram of GFRP- Steel HSC composite beams and node region.
Fig. 5 is the connection diagram of GFRP- Steel HSC composite beams and compoboard.
Fig. 6 is the connection diagram of GFRP- Steel HSC composite beams and girder steel.
Specific embodiment
As shown in Fig. 2 GFRP- Steel HSC composite beams of the invention mainly include concrete region, the concrete shape
Into compression beam body area 1, along the direction of compression beam body section length, row weldering nail 5 is each embedded with its both sides.Two groups of steel webs 4
Positioned at the side wall of concrete region, its one end is provided with kink 41, and the other end extends laterally, and steel web is formed with concrete region
One cavity of longitudinal opening, GFRP hollow pipes 3 (being in this embodiment thin-wall hollow pipe) are located in the cavity, and openend leads to
Tension steel plate 2 is crossed to close.The connected mode of each component can follow closely melting welding on steel web for weldering, and steel web passes through with tension steel plate
The mode of groove welding is welded and fixed.The upper surface of tension steel plate scribbles the adhesives such as epoxy resin, connects with GFRP thin-wall hollow pipes
Connect.The size of GFRP thin-wall hollow pipes is matched with the size of hollow cavity.When prefabricated, will weldering nail melting welding on steel web,
Tension upper surface of steel plate coating religion adhesive, GFRP thin-wall hollow pipes are positioned over the surface for scribbling adhesive, by tension steel plate with
Steel web is welded and fixed, that is, form the framework of beam body, in relevant range casting concrete.
In this embodiment, not only intensity is high but also lightweight for hollow pipe, is that one kind entirely different with prior art is new
Technology design.
Fig. 5 is gone to, in a further embodiment, the connected mode of GFRP- Steel HSC composite beams and compoboard
For the kink of steel web is welded and fixed by welding nail 7 with profiled sheet 6.After welding is integral, casting concrete.
Fig. 6 is then described, GFRP- Steel HSC composite beams are to be welded on the steel web with the connected mode of girder steel
Ribbed stiffener is connected to, ribbed stiffener 9 is bolted with connecting plate 8, the other end of connecting plate is fixed by bolt 11 with girder steel 10
Connection.In other embodiments, steel web can directly be welded with beam or is fixedly connected using other modes.
Going to Fig. 4, GFRP- Steel HSC composite beams are with the connected mode of gusset plate, the steel web end
Fanwise slit 42 is provided with, is welded and fixed with gusset plate, butt weld 43, the tension steel are formed between steel web and gusset plate
Plate is welded and fixed by way of groove welding 2a with gusset plate.
Be can be seen that the invention provides a kind of new technology design from above-mentioned several embodiments, this structure is not only light
Matter is high-strength, and connection between other structures is convenient to, and speed of application is fast.Lightweight, the Neng Goujie of structure itself
About material, has the advantages that low cost.
In a further embodiment, the concrete strength in the compression beam body area is not less than C40, the tension steel plate and
Steel web uses Q345.
The method for manufacturing above-mentioned GFRP- Steel HSC composite beams, comprises the following steps：
Step 1. steel plate cutting stock and welding, control steel plate thickness deviation in ± 0.07mm, steel web top it is perpendicular
Straight deviation is less than 0.3mm, and the end of steel web offers fanwise slit；Tension steel plate and steel abdomen are welded by the way of groove welding
Plate, welds nail and steel web by the way of fusion welds；
Step 2. coats one layer of epoxy resin in the top surface of tension steel plate, and GFRP hollow pipes are inserted into the top of tension steel plate
Face；
Step 3. is welded steel web and gusset plate by butt weld after lifting is in place, tension steel plate and gusset plate
Connected by groove welding；
In GFRP hollow pipes upper surface casting concrete, maintenance is to fully hardened for step 4..
In a further embodiment, being if desired connected, then the method also includes following step to combination beam with other beams
Suddenly：Step 31. is connected combination beam and other beams：Other beams are directly welded on the steel web of combination beam, or in steel
Ribbed stiffener is welded on web, is hinged with other beams by ribbed stiffener.
In above-mentioned preparation method, if floorboard uses compoboard, the method also comprises the following steps：
Profiled sheet is laid on the GFRP- steel-high-strength concrete group not poured after the completion of node installation for step 32.
Close on beam, profiled sheet and combination beam are connected by welding nail, combination beam and compoboard one-piece casting.
It should be noted that the order between step can be adjusted according to actual conditions in the above-described embodiments, sequence number is
For convenience of description, non-limiting order between them.
Project case one
GFRP- Steel HSC composite beams, it is characterised in that by compressive region concrete (i.e. coagulation local soil type into compression
Beam body area, similarly hereinafter), tension steel plate, GFRP hollow pipes, steel web and weldering nail composition.The b wide h ratios high of this combination beam are b/h=
3/5,；Compressive region concrete is subject to compression when sagging moment is born, and tension steel plate is subject to tension when sagging moment is born.Receive
Compressive concrete uses more than C40 high-strength concretes, tension steel plate to use Q345 steel with steel web.
The hollow tube thickness of GFRP be 2mm, the outer dimension length of side be it is wider than tension steel plate subtract two times of few 1mm of steel web thickness, i.e.,
B-2t-1mm, wherein t are steel web thickness；Length 100mm shorter than beam span, both two ends be respectively retracted 50mm.
Weldering nail is welding on steel web using the stage low carbon steel such as Q345, and position is at GFRP hollow pipes top above 50mm,
Spacing according to《Reinforced concrete composite structure technical regulation》(JGJ138-2001) it is designed.
U-shaped structure is welded into using groove welding by will draw between steel plate and steel web, weldering nail is welding on steel web.GFRP
Hollow pipe is penetrated inside U-shaped structure, is shelved on tension steel plate, and is done position with tension steel plate using epoxy resin and fixed.
Compressive region concreting does bottom template in GFRP hollow pipes upper surface using GFRP pipes, and side template is done using steel web.
In the construction stage, concrete is flowable state, and without bearing capacity, construction loads is made up of tension steel plate with firm web
U-shaped structure and GFRP hollow pipes bear jointly.Construction loads stage U-shaped structure is being born with GFRP hollow pipes all in bullet
Proterties state, the amount of deflection of beam according to《Steel is constructed with Combined concrete building (room) lid structure》(05SG522) regulation be controlled to l/250 and
No more than 25mm, l is beam span.U-shaped structure is substantially former in accordance with the mechanics of materials with GFRP hollow pipes during bearing capacity and deformation are calculated
Reason and deformation compatibility condition are calculated.
Operational phase, concrete is fully hardened.Design concrete all bears compression, according to plane cross-section assumption, is pressurized
Area's TOC reaches capacity strain stressc, tension steel plate reaches yield strain εy, the strain figure of beam section is shown in accompanying drawing 3.According to change
Shape compatibility conditions, GFRP hollow pipe sectional twisting angles are mutually all θ, such as Fig. 3.The thus strain of GFRP hollow pipe lower edges is 0.5
εy.Therefore, the bend-carrying capacity of steel-concrete built-up section is fy×b×t0×(h-0.5hc), GFRP hollow pipes are held by curved
Load power is 0.5 εy×Efrp×2mm×bfrp×hfrp。
Wherein, EfrpIt is the elastic modelling quantity of GFRP, bfrpWith hfrpRespectively height and width of GFRP hollow pipes.GFRP- steel-height
Reinforced concrete combination beam is fy×b×t0×(h-0.5hc)+0.5εy×Efrp×2mm×bfrp×hfrp。t0It is the thickness of tension steel plate
Degree, t is the thickness of steel web.fyIt is compression strength design load, hcIt is the thickness of compression concrete region.
Due to the effect of GFRP hollow pipes, GFRP- Steel HSC composite beams are than common steel-concrete composite beam certainly
γ is alleviated againc×bfrp×hfrp, γcIt is the severe of concrete；0.5 ε of bearing power increasey×Efrp×2mm×bfrp×hfrp。
GFRP- Steel HSC composite beams, its Making programme is as follows：Steel plate cutting and welding, GFRP hollow pipes peace
Put, construction and installation positioning, concreting.
In this embodiment, steel plate thickness deviation should be controlled during steel plate cutting stock within ± 0.07mm, and steel abdomen
Plate top vertical deflection is less than 0.3mm.Open the fanwise slit that radius is 40mm in steel web end.
Between tension steel plate and steel web using butt groove weld connect, weld size according to《Code for design of steel structures》
(GB50017) it is designed, welding rod uses E50 type welding rods.Connected by melting welding between weldering nail and steel web, welding uses BS308
Weldering nailing machine welding.
After weldering nail positioning welding, one layer of epoxy resin is applied in tension steel plate top surface, GFRP hollow pipes are inserted into tension steel
Plate top surface.
Before construction hoisting, the amount of deflection and bearing capacity of hoisting process central sill should be calculated, ignore the carrying masterpiece of GFRP hollow pipes
With the rational Hoisting Program of selection.
Steel web and gusset plate are welded by butt weld after lifting is in place, weld seam is in distance steel web, tension steel plate
It is connected by groove welding with gusset plate.
Temporary support is set according to calculation on Construction after the completion of connection, is not provided with if calculation on Construction does not need temporary support,
Then in GFRP hollow pipes upper surface casting concrete, and conserved to fully hardened.
Other beams are connected on the beam and can weld ribbed stiffener on steel web or on steel web by being directly welded at and carry out
It is hinged to realize.As floorboard uses compoboard, after node installation is completed, profiled sheet is laid on the GFRP- not poured
On Steel HSC composite beams, profiled sheet is connected with combination beam by welding nail.Then Jiang Liang and plate one-piece casting.GFRP-
Steel HSC composite beams are connected with girder steel, and ribbed stiffener is welded on the steel web of combination beam, and the web of girder steel is passed through into spiral shell
Bolt and connecting plate are connected on ribbed stiffener.
In a word, in the above-described embodiments, hollow interval is formed in combination beam using GFRP (glass fiber compound material),
Material can not only be saved on the premise of the stress performance of steel-concrete assembly is not weakened, and knot can be effectively improved
The bearing capacity of structure.The present invention improves the bearing capacity of combination, working security using new design and new material；And using new
Structure is constructed, and gives full play to the mechanical property of material, and it is good solve interstructural connectivity problem, realize that material is used
The minimum of amount and the safe of construction.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited in above-mentioned implementation method
Detail, in range of the technology design of the invention, various equivalents can be carried out to technical scheme, this
A little equivalents belong to protection scope of the present invention.
Claims (3)
1. a kind of method of manufacture GFRP- Steel HSC composite beams, it is characterised in that
The GFRP- Steel HSC composite beams include the compression beam body area being made up of concrete（1）, along the strut-beam
Body section length direction is embedded in some welderings nail in concrete beam body in advance（5）, the steel web fixed with the weldering nail welding（4）If,
The GFRP hollow pipes being placed in the open-ended cavity of steel web formation（3）, and with the steel web welding, with closed cavity opening
The tension steel plate at end（2）；Side wall of the outer wall of the GFRP hollow pipes near concrete beam body area, steel web and tension steel plate；
The steel web is provided with kink near the one end in compression beam body area（41）；
GFRP- Steel HSC composite beams are that the kink of steel web is by welding nail and die mould with the connected mode of compoboard
Steel plate（6）It is welded and fixed；
GFRP- Steel HSC composite beams are to be welded with ribbed stiffener on the steel web with the connected mode of girder steel, are put more energy into
Rib and connecting plate（8）It is bolted, the other end of connecting plate is fixedly connected by bolt with girder steel；
GFRP- Steel HSC composite beams are that the steel web end is provided with sector and cuts with the connected mode of gusset plate
Mouthful, it is welded and fixed with gusset plate, the tension steel plate is welded and fixed by way of groove welding with gusset plate；
The concrete strength in the compression beam body area is not less than C40, and the tension steel plate and steel web use Q345；
The method comprises the following steps：
Step 1. steel plate cutting stock with welding, control steel plate thickness deviation in ± 0.07mm, steel web top it is vertical partially
Difference is less than 0.3mm, and the end of steel web offers fanwise slit；Tension steel plate and steel web are welded by the way of groove welding,
Nail and steel web are welded by the way of fusion welds；
Step 2. coats one layer of epoxy resin in the top surface of tension steel plate, and GFRP hollow pipes are inserted into the top surface of tension steel plate；
Step 3. is welded steel web and gusset plate by butt weld after lifting is in place, and tension steel plate passes through with gusset plate
Groove welding is connected；
In GFRP hollow pipes upper surface casting concrete, maintenance is to fully hardened for step 4..
2. the method for manufacturing GFRP- Steel HSC composite beams as claimed in claim 1, it is characterised in that also include：
Step 31. is connected combination beam and other beams：Other beams are directly welded on the steel web of combination beam, Huo Zhe
Ribbed stiffener is welded on steel web, is hinged with other beams by ribbed stiffener.
3. the method for manufacturing GFRP- Steel HSC composite beams as claimed in claim 2, it is characterised in that also include：
Profiled sheet is laid on the GFRP- Steel HSC composite beams not poured after the completion of node installation for step 32.
On, profiled sheet and combination beam be connecteds by welding nail, combination beam and compoboard one-piece casting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510522401.8A CN105113712B (en) | 2015-08-24 | 2015-08-24 | The construction method of GFRP steel high-strength concrete combination beams |
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| CN201510522401.8A CN105113712B (en) | 2015-08-24 | 2015-08-24 | The construction method of GFRP steel high-strength concrete combination beams |
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| CN105113712B true CN105113712B (en) | 2017-06-16 |
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| CN108560823A (en) * | 2018-03-28 | 2018-09-21 | 攀枝花学院 | PBL puts more energy into type open steel box-concrete combination beam and construction method |
| ES2701779B2 (en) | 2018-09-10 | 2020-10-08 | Univ Valencia Politecnica | Polymer profile segment, hybrid structure and manufacturing method. |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55126652A (en) * | 1979-03-19 | 1980-09-30 | Sato Tekko Co Ltd | Composite crosssbeam |
| KR101323268B1 (en) * | 2011-09-20 | 2013-10-30 | 우경기술주식회사 | Concrete composite steel pipe girder |
| CN203782972U (en) * | 2014-04-10 | 2014-08-20 | 哈尔滨工程大学 | Permanent GFRP material formwork and corresponding GFRP-concrete combined beam thereof |
| CN104060761A (en) * | 2014-05-23 | 2014-09-24 | 浙江东南网架股份有限公司 | U-shaped steel-concrete composite section beam and construction method of section beam |
-
2015
- 2015-08-24 CN CN201510522401.8A patent/CN105113712B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55126652A (en) * | 1979-03-19 | 1980-09-30 | Sato Tekko Co Ltd | Composite crosssbeam |
| KR101323268B1 (en) * | 2011-09-20 | 2013-10-30 | 우경기술주식회사 | Concrete composite steel pipe girder |
| CN203782972U (en) * | 2014-04-10 | 2014-08-20 | 哈尔滨工程大学 | Permanent GFRP material formwork and corresponding GFRP-concrete combined beam thereof |
| CN104060761A (en) * | 2014-05-23 | 2014-09-24 | 浙江东南网架股份有限公司 | U-shaped steel-concrete composite section beam and construction method of section beam |
Non-Patent Citations (1)
| Title |
|---|
| 基于能量法的GFRP管与混凝土板组合梁轴向力计算;秦国鹏等;《东北大学学报》;20101231;第31卷(第12期);第1787页右栏第1段，图1 * |
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