CN103485481A - Hybrid fiber winding steel tube internally-installed reactive powder concrete member and preparation method - Google Patents
Hybrid fiber winding steel tube internally-installed reactive powder concrete member and preparation method Download PDFInfo
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- CN103485481A CN103485481A CN201310422067.XA CN201310422067A CN103485481A CN 103485481 A CN103485481 A CN 103485481A CN 201310422067 A CN201310422067 A CN 201310422067A CN 103485481 A CN103485481 A CN 103485481A
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Abstract
The invention discloses a hybrid fiber winding steel tube internally-installed reactive powder concrete member and a preparation method, and belongs to the field of buildings. The hybrid fiber winding steel tube internally-installed reactive powder concrete member comprises a hybrid fiber winding steel tube and steel tube internally-poured reactive powder concrete. Compared with a traditional steel tube high-strength concrete combination column and a single-fiber FRP tube constraint high-strength concrete member, the member can improve the bearing capacity, the deformability, the anti-seismic performance and the durability. The hybrid fiber winding steel tube internally-installed reactive powder concrete member is applicable to the technical field of concrete combination column structures, can be used for a newly-constructed structure and can also be used for a reinforcing and lifting project of steel tube reactive powder concrete columns.
Description
Technical field
The object of the present invention is to provide a kind of assorted fibre to be wound around Steel Pipe Reactive Powder Concrete (RPC) member, be applicable to concrete combined component (post, beam) technical field of structures, belonged to building field.
Technical background
Being wound around steel tube confinement RPC with assorted fibre, having formed a kind of Novel combined column---assorted fibre is wound around the members such as steel pipe reactive powder concrete column, beam.
RPC is a kind of high strength, high tenacity, high durable super high strength concrete.Its basic preparation principle is: by fineness and the defect active, that farthest reduce material internal that improves component, to obtain superhigh intensity and high-durability; Improve deformability by mixing micro steel fiber.But RPC, under heavily stressed or complicated applied force state, easily produces the burst brittle fracture, and its safety reduces greatly, affected its application in Practical Project.For solving the problem that the RPC deformability is not enough, brittle fracture easily occurs, Chinese scholars adopts the steel tube confinement RPC, improves ductility, prevents that RPC from brittle fracture occurring.But because the poisson's ratio of steel is greater than the initial poisson's ratio of RPC, thus the Steel Pipe Reactive Powder Concrete member at the loading initial stage, restraint forces is little, the phenomenon of the disengaging of RPC and steel pipe occurs, and steel pipe is exposed to outside, easily corrosion.
Summary of the invention
The problem existed in order to overcome steel tube confinement RPC, the invention provides assorted fibre and be wound around constraint steel pipe RPC member and preparation method.Be wound around assorted fibre FRP outside steel pipe, the FRP that adopts assorted fibre to prepare, pseudo-yield phenomenon is arranged, there is strain hardening feature, multistage ductile fracture, ductility high, be similar to the surrender that steel are the same, can overcome the large deficiency of single FRP fragility, not only can improve columns bearing capacity, deformability, and can improve the coupled column durability.
The object of the present invention is to provide a kind of assorted fibre to be wound around the built-in RPC post of steel pipe, this member is compared with conventional steel high-strength concrete coupled column, Single Fiber FRP pipe constraint RPC post, can improve bearing capacity, deformability and anti-seismic performance.
For achieving the above object, the present invention has taked following technical scheme:
A kind of assorted fibre of the present invention is wound around the built-in RPC member of steel pipe, it is characterized in that, comprises that hybrid fiber cloth is wound around steel pipe and is filled in the RPC mixed in fine winding dimension steel pipe.
Described hybrid fiber cloth refers to carbon cloth, aryl fiber cloth, high strength glass fiber sheet or basalt fiber cloth, it is to be wound around a kind of two-way cloth as one deck outside steel pipe that described hybrid fiber cloth is wound around steel pipe, be wound around again another kind of two-way cloth after the brush epoxy glue, the like, form interlayer and mix.
Described hybrid fiber cloth is wound around, and the promiscuous mode of fiber can be mixed and be replaced with interlaminar hybrid by interlayer, and the same layer cloth is comprised of many kinds fibre.Interlayer mixes for every one deck cloth is single kinds of fibers, and interlaminar hybrid is the cloth of every one deck cloth for two or more fiber hybrids one-tenth, preferably is wound around 3-4 layer cloth; Preferably outermost layer is two-way carbon cloth or aryl fiber cloth, then is optimized for that to be close to outer surface of steel tube be glass fiber or basalt fiber cloth.Cloth preferred thickness 0.18-0.24mm.
Described winding cloth is two-way cloth, and the fiber angle has multiple.
Described reactive powder concrete column body section be shaped as circle or ellipse.
A kind of assorted fibre is wound around the preparation method of the built-in RPC member of steel pipe, and concrete making step is as follows:
1), according to designing requirement, determine diameter of steel tube, thickness;
2) the steel tube surface polishing is clean, be coated with epoxy glue, be wound around the first floor cloth, be coated with epoxy glue; Be wound around again second layer cloth, be coated with epoxy glue, then be wound around the 3rd layer of cloth, be coated with epoxy glue, the like;
3) until step 2) after the assorted fibre (FRP) that is coated with epoxy glue solidifies fully, using the steel pipe that is wound around assorted fibre as template, build RPC in pipe, and carry out maintenance.
Be wound around two-way cloth steel pipe is outside, steel with mix between the FRP material complementary extremely strongly, the different materials mixing by two kinds of performances of steel and FRP, realized mutual supplement with each other's advantages.Steel with mix FRP and mix after using the steel that forms-mix the FRP pipe and there is stable secondary rigidity, the effectively distortion of control structure, realized " middle shake can be repaiied ", for important structure, realizes by " large shake less than ", to the transformation of " shake can be repaiied greatly ".
Adopt two-way hybrid fiber cloth to be wound around steel pipe, overcome steel tube confinement RPC to load initial stage steel tube confinement effect little, steel pipe and RPC easily come to nothing and wait obviously not enoughly, are loading the initial stage steel pipe and are mixing just generation effect of contraction jointly of FRP, improve binding effect, prevented steel pipe void; Assorted fibre is wound around steel pipe, and after can overcoming the steel pipe surrender, distortion is large, the deficiency that restraint forces no longer increases, and assorted fibre constraint steel pipe, and after the steel pipe surrender, FRP plays a role, and total restraint forces still rises; And assorted fibre can be adjusted assorted fibre kind, ratio and winding direction according to designer's intention, performance mixes the binding effect of FRP to greatest extent, makes modulus of elasticity, poisson's ratio, intensity and restraint forces, the deformability etc. of FRP prepare according to designing requirement.Simultaneously, the FRP pipe can also, as the protecting sheathing of steel pipe, improve the steel pipe corrosion-proof durability.Therefore, mix FRP and be wound around steel pipe reactive powder concrete column than steel pipe reactive powder concrete column and Single Fiber winding steel tube confinement RPC post, there is higher bearing capacity, better deformation performance and anti-seismic performance, can be used under the adverse environments such as salinity is large, humidity is high.
It is a kind of very rational structural element that assorted fibre is wound around the Steel Pipe Reactive Powder Concrete member, peripheral mixing FRP and both can effectively retraining steel pipe and core concrete of being wound around, improves the bearing capacity ability; Can protect outside steel pipe again, prevent corrosion.
Assorted fibre is wound around the built-in reactive powder concrete column of steel pipe and has characteristics: (1) RPC is the strong material of a kind of superelevation.(2) assorted fibre is wound around steel pipe core RPC is produced to constraint, makes core RPC in triaxial stress state, has more strengthened the bearing capacity of member.(3) assorted fibre is wound around steel pipe, has overcome that steel tube confinement RPC is little in stressed initial stage steel pipe effect, the deficiency of steel pipe and concrete void.(4) assorted fibre be wound around has made up the deficiency that the rear restraint forces of steel pipe surrender no longer increases, and the steel pipe that is wound around assorted fibre has the strain hardening feature, after the steel pipe surrender, and fiber performance effect of contraction.(5) assorted fibre is wound around the problem that steel pipe has overcome Single Fiber winding pipe deformation scarce capacity.(6) steel with mix FRP and mix after using the steel that forms-mix the FRP pipe and there is stable secondary rigidity, the effectively distortion of control structure, realize " middle shake can be repaiied ", for important structure, realizes by " large shake less than ", to the transformation of " shake can be repaiied greatly ".(7) outside winding fiber is the protecting sheathing of steel pipe, and the FRP pipe has good corrosion resistance, and Filament-wound Machine steel pipe RPC member can be used under the adverse environments such as salinity is large, humidity is high, thereby has solved the etching problem of concrete filled steel tubular member.(8) assorted fibre winding steel pipe not only has extremely strong cuff effect, and there is good deformation performance, can significantly reduce the fragility of core RPC, increase substantially ductility and the energy-dissipating property of post, make assorted fibre be wound around steel pipe reactive powder concrete column and there is good anti-seismic performance.(9) steel pipe is the mould of RPC, need not prop up separately mould.
Therefore, assorted fibre is wound around steel pipe reactive powder concrete column/beam and combines the advantage that mixes FRP pipe concrete column/beam and steel pipe reactive powder concrete column/beam, there is very high bearing capacity, good deformation performance and decay resistance, will be in engineerings such as bridge, super highrise building, large-span structures, or at marine environment, be subject to there is application value in the Structural Engineering of chemical attack.
Assorted fibre is wound around steel pipe reactive powder concrete column and has inherited and integrated Steel Pipe Reactive Powder Concrete and the advantage that mixes the constraint of FRP pipe:
Assorted fibre is wound around the Steel Pipe Reactive Powder Concrete member by mixing the reasonably combined of FRP, steel and RPC, takes full advantage of the performance of various types of materials, has increased the utilization rate of material.
The accompanying drawing explanation
The built-in RPC member of Fig. 1 tri-specific admixture Filament-wound Machine steel pipe schematic diagram;
The built-in RPC member of Fig. 2 tetra-specific admixture Filament-wound Machine steel pipe schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
Embodiment 1:
Now 1 the invention will be further described by reference to the accompanying drawings: at first according to designing requirement factory, prepare steel pipe;
Steel tube surface is processed totally, be coated with epoxy glue; Be wound around assorted fibre; Build RPC in steel pipe.
Cylinder in the present embodiment adopts the cylinder of diameter 350mm, and cylinder length is 2.1m.
RPC compressive strength 145-160MPa.
3 specific admixture Filament-wound Machines are in the steel pipe outside, and promiscuous mode is that interlayer mixes, and wraps up from inside to outside bidirectional glass fiber cloth, carbon cloth and aryl fiber cloth.Two-way carbon cloth thickness 0.19mm wherein, tensile strength 4420MPa, modulus of elasticity 2.0 * 10
5mPa, elongation per unit length 1.7%; Bidirectional glass fiber cloth thickness 0.19mm, tensile strength 3000MPa, modulus of elasticity 0.51 * 10
5mPa, elongation per unit length 3.2%; Two-way aryl fiber cloth 0.22mm, tensile strength 3420MPa, modulus of elasticity 1.8 * 10
5mPa, elongation per unit length 2.9%.
The filametntary angle of two-way cloth be ± 55 °, ± 45 °.
Tube thickness is 40mm.
Adopt material and the cylinder sizes of embodiment 1, be wound around assorted fibre and improve 58.4% than the capacity under axial of the steel pipe reactive powder concrete column that is not wound around assorted fibre, the ultimate deformation ability improves 112.4%, and the energy dissipation capacity under low cycle repetitive load improves 221.5%.
Embodiment 2:
Except assorted fibre is different from embodiment 1, all the other are identical.
Be wound around 4 specific admixture fibers formation and mix the FRP pipe, promiscuous mode is that interlayer mixes, and wraps up successively two-way basalt fibre, glass fabric, aryl fiber cloth and carbon cloth.Two-way carbon fiber thickness 0.2mm wherein, tensile strength 4420MPa, modulus of elasticity 2.0 * 10
5mPa, elongation per unit length 1.7%; Two-way aryl fiber cloth 0.22mm, tensile strength 3420MPa, modulus of elasticity 1.8 * 10
5mPa, elongation per unit length 2.9%; Two-way basalt fibre thickness 0.22mm, tensile strength 2420MPa, modulus of elasticity 1.0 * 10
5mPa, elongation per unit length 2.4%; Bidirectional glass fiber cloth thickness 0.18mm, tensile strength 3000MPa, modulus of elasticity 0.51 * 10
5mPa, elongation per unit length 3.2%.
In two-way cloth, the fiber angle is ± 55 °.
Tube thickness is 40mm.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (10)
1. an assorted fibre is wound around the built-in RPC member of steel pipe, it is characterized in that, comprises that hybrid fiber cloth is wound around steel pipe and is filled in the RPC in the assorted fibre steel pipe.
2. a kind of assorted fibre according to claim 1 is wound around the built-in RPC member of steel pipe, it is characterized in that, described hybrid fiber cloth refers to carbon cloth, aryl fiber cloth, high strength glass fiber sheet or basalt fiber cloth, it is to be wound around a kind of cloth as one deck outside steel pipe that described hybrid fiber cloth is wound around steel pipe, be wound around again another kind of cloth after the brush epoxy glue, the like, the interlayer that forms fiber mixes.
3. a kind of assorted fibre according to claim 2 is wound around the built-in RPC member of steel pipe, it is characterized in that, the promiscuous mode of fiber can be mixed and be replaced with interlaminar hybrid by interlayer, and interlaminar hybrid is the cloth that every one deck cloth becomes for two or more fiber hybrids.
4. a kind of assorted fibre according to claim 2 is wound around the built-in RPC member of steel pipe, it is characterized in that, outermost layer is two-way carbon cloth or aryl fiber cloth.
5. a kind of assorted fibre according to claim 2 is wound around the built-in RPC member of steel pipe, it is characterized in that, being close to steel pipe is bidirectional glass fiber cloth, is then two-way basalt fiber cloth or glass fabric, and outermost layer is for being wound around two-way carbon cloth or aryl fiber cloth.
6. a kind of assorted fibre according to claim 1 is wound around the built-in RPC member of steel pipe, it is characterized in that, choosing is wound around 3-4 layer cloth.
7. a kind of assorted fibre according to claim 1 is wound around the built-in RPC member of steel pipe, it is characterized in that cloth preferred thickness 0.18-0.24mm.
8. a kind of assorted fibre according to claim 1 is wound around the built-in RPC member of steel pipe, it is characterized in that, described winding cloth is two-way cloth, and the fiber angle has multiple.
9. a kind of assorted fibre according to claim 1 is wound around the built-in RPC member of steel pipe, it is characterized in that, described reactive powder concrete column body section be shaped as circle or ellipse.
10. prepare the method that the described any assorted fibre of claim 1-9 is wound around the built-in RPC member of steel pipe, it is characterized in that, comprise the steps:
1), according to designing requirement, determine diameter of steel tube, thickness;
2) the steel tube surface polishing is clean, be coated with epoxy glue, be wound around the first floor cloth, be coated with epoxy glue; Be wound around again second layer cloth, be coated with epoxy glue, then be wound around the 3rd layer of cloth, be coated with epoxy glue, the like;
3) until step 2) after the assorted fibre (FRP) that is coated with epoxy glue solidifies fully, using the steel pipe that is wound around assorted fibre as template, build RPC in pipe, and carry out maintenance.
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Cited By (9)
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| CN104233964A (en) * | 2014-09-30 | 2014-12-24 | 长安大学 | CFRP cloth reinforcing structure of steel truss bridge steel tube tubular joints |
| CN104563332A (en) * | 2014-12-30 | 2015-04-29 | 长安大学 | Built-in steel plate and reactive powder concrete composite shear wall |
| CN106835935A (en) * | 2017-03-29 | 2017-06-13 | 哈尔滨工业大学 | A kind of outsourcing FRP steel pipe arch structures |
| CN107217786A (en) * | 2017-05-05 | 2017-09-29 | 广东工业大学 | Confusion type FRP steel composite reinforcing marine sand concrete beams |
| CN108331257A (en) * | 2018-01-19 | 2018-07-27 | 淮阴工学院 | A kind of FRP pipe concrete coupled columns and preparation method thereof with reinforcing rib |
| CN108360749A (en) * | 2018-02-12 | 2018-08-03 | 哈尔滨工大嘉图科技发展有限公司 | A kind of FRP- steel interlining composite pipes concrete column and preparation method thereof |
| CN110306726A (en) * | 2018-03-27 | 2019-10-08 | 王哲 | Composite structure and preparation method thereof |
| CN111501533A (en) * | 2020-04-29 | 2020-08-07 | 合肥工业大学 | Method for enhancing anti-collision performance of concrete-filled steel tube pier by sticking FRP cloth |
| WO2021003862A1 (en) * | 2019-07-10 | 2021-01-14 | 中国矿业大学 | Fabric-reinforced ecc-steel pipe-steel frame composite member and fabrication method therefor |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233964A (en) * | 2014-09-30 | 2014-12-24 | 长安大学 | CFRP cloth reinforcing structure of steel truss bridge steel tube tubular joints |
| CN104563332A (en) * | 2014-12-30 | 2015-04-29 | 长安大学 | Built-in steel plate and reactive powder concrete composite shear wall |
| CN106835935A (en) * | 2017-03-29 | 2017-06-13 | 哈尔滨工业大学 | A kind of outsourcing FRP steel pipe arch structures |
| CN107217786A (en) * | 2017-05-05 | 2017-09-29 | 广东工业大学 | Confusion type FRP steel composite reinforcing marine sand concrete beams |
| CN108331257A (en) * | 2018-01-19 | 2018-07-27 | 淮阴工学院 | A kind of FRP pipe concrete coupled columns and preparation method thereof with reinforcing rib |
| CN108360749A (en) * | 2018-02-12 | 2018-08-03 | 哈尔滨工大嘉图科技发展有限公司 | A kind of FRP- steel interlining composite pipes concrete column and preparation method thereof |
| CN110306726A (en) * | 2018-03-27 | 2019-10-08 | 王哲 | Composite structure and preparation method thereof |
| CN110306726B (en) * | 2018-03-27 | 2022-03-18 | 王哲 | Composite structure and manufacturing method thereof |
| WO2021003862A1 (en) * | 2019-07-10 | 2021-01-14 | 中国矿业大学 | Fabric-reinforced ecc-steel pipe-steel frame composite member and fabrication method therefor |
| CN111501533A (en) * | 2020-04-29 | 2020-08-07 | 合肥工业大学 | Method for enhancing anti-collision performance of concrete-filled steel tube pier by sticking FRP cloth |
| CN111501533B (en) * | 2020-04-29 | 2022-01-04 | 合肥工业大学 | Method for enhancing anti-collision performance of concrete-filled steel tube pier by sticking FRP cloth |
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Application publication date: 20140101 |