CN103883076A - Intelligent hybrid composite FRP (Fiber Reinforce Plastic) prestressed reinforcement based on piezoelectric ceramic and preparation method of intelligent hybrid composite FRP prestressed reinforcement - Google Patents
Intelligent hybrid composite FRP (Fiber Reinforce Plastic) prestressed reinforcement based on piezoelectric ceramic and preparation method of intelligent hybrid composite FRP prestressed reinforcement Download PDFInfo
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- CN103883076A CN103883076A CN201410066387.0A CN201410066387A CN103883076A CN 103883076 A CN103883076 A CN 103883076A CN 201410066387 A CN201410066387 A CN 201410066387A CN 103883076 A CN103883076 A CN 103883076A
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Abstract
The invention discloses an intelligent hybrid composite FRP (Fiber Reinforce Plastic) prestressed reinforcement based on a piezoelectric ceramic and a preparation method of the intelligent hybrid composite FRP prestressed reinforcement. The intelligent hybrid composite FRP prestressed reinforcement is prepared from an FRP prestressed reinforcement, wherein the surface of the FRP prestressed reinforcement is provided with a plurality of grooves, a piezoelectric ceramic piece used as a driver is fixedly arranged in each groove in the embedded length direction and is arranged on one side of the surface of the FRP prestressed reinforcement, a steel wire gauze with the surface coated with an epoxy resin layer is wrapped outsides the FRP prestressed reinforcement, the surface of the steel wire gauze is coated with the epoxy resin layer uniformly, a fiber cloth tape which is soaked by epoxy resin wraps the outer surface of the steel wire gauze, a plurality of piezoelectric ceramic pieces used as sensors are fixed on the surface of the fiber cloth tape in the embedded length direction, and all the piezoelectric ceramic pieces used as the drivers and the sensors are respectively coated with an epoxy resin insulation waterproof layer. With the adoption of the intelligent hybrid composite FRP prestressed reinforcement, the ductility performance and the shear resistance of the FRP prestressed reinforcement are improved, and a monitoring system based on the piezoelectric ceramic is also preset.
Description
Technical field
The present invention relates to belong to the new material development field in the field such as building, traffic, particularly compound FRP presstressed reinforcing steel of a kind of intelligent hybrid based on piezoelectric ceramics and preparation method thereof.
Background technology
Fibre reinforced composites FRP (Fiber Reinforced Polymer/Plastic) muscle is a kind of high-performance muscle material being formed by resin compounded such as continuous glass fiber, carbon fiber or aramid fiber and polyester, vinyl or epoxies.Advanced composite materials especially carbon fibre reinforced composite CFRP (Carbon Fiber Reinforced Polymer/Plastic) muscle with its intensity high (have higher than 3000MPa, be about 2 times of high strength wire), lightweight (be about steel 1/5), exempt from corrosion and the excellent properties utmost point promises to be under extreme natural environment in the bridge construction potential substitute of traditional plain bars, high tensile steel wire and steel strand such as anti-fatigue performance is good.In non-prestressed FRP tendon concrete structure, because the modulus of elasticity of FRP muscle is relatively low, the distortion of structure is larger, thereby the high strength of FRP muscle generally can not get effective performance.In order to give full play to FRP muscle high-strength light, the feature that corrosion-resistant and anti-fatigue performance is good, can be used in all kinds of structures FRP muscle as presstressed reinforcing steel.But, apply prestressing force with FRP muscle and strengthen concrete structure, can improve the ultimate bearing capacity of its operational phase, but ductile performance greatly reduces, this is very disadvantageous concerning earthquake resistant engineering.Because FRP does not have the obvious Plastic Flow stage, FRP structural damage often shows brittleness again, and this safe handling for structure is also disadvantageous.This just causes FRP muscle to apply and be restricted in the prestressed reinforced concrete construction of civil engineering.
Summary of the invention
Technical problem to be solved by this invention is, for prior art deficiency, compound FRP presstressed reinforcing steel of a kind of intelligent hybrid based on piezoelectric ceramics and preparation method thereof is provided, improve the ductile performance of FRP presstressed reinforcing steel, improve the shear behavior of FRP presstressed reinforcing steel, make FRP presstressed reinforcing steel not only can be used for the newly-built structure of civil structure, and can be applied to the strengthen of concrete structure and the damage monitoring of structure.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: the compound FRP presstressed reinforcing steel of a kind of intelligent hybrid based on piezoelectric ceramics preparation method, and the method is:
1) offer multiple grooves on FRP presstressed reinforcing steel material surface along burying length direction, described groove size is mated with piezoelectric ceramic piece size, in the groove of FRP presstressed reinforcing steel material surface one side, paste the piezoelectric ceramic piece as driver along burying length direction, and encapsulate piezoelectric ceramic piece with epoxide-resin glue;
2) by fixing gauze wire cloth one end and FRP presstressed reinforcing steel material bonding, gauze wire cloth is laid smooth, and on gauze wire cloth even brushwork epoxy resin, ensure the epoxy resin impregnated full of gauze wire cloth and FRP presstressed reinforcing steel material interface;
3) other end of compression gauze wire cloth, rotation FRP presstressed reinforcing steel material also applies and the axial vertical stretching force of FRP presstressed reinforcing steel material, makes the closely knit even parcel FRP presstressed reinforcing steel of gauze wire cloth;
4) axially squeeze and remove unnecessary epoxy resin along FRP presstressed reinforcing steel material, the fiber strap that flooded epoxy resin is wrapped on gauze wire cloth;
5) fix multiple piezoelectric ceramic pieces as sensor at cloth belt surface along burying length direction, obtain the compound FRP presstressed reinforcing steel of piezoelectric ceramics intelligent hybrid.
Described fiber strap axially becomes miter angle with FRP presstressed reinforcing steel material.
The present invention also provides a kind of intelligent hybrid based on piezoelectric ceramics that utilizes said method to prepare compound FRP presstressed reinforcing steel, comprise FRP presstressed reinforcing steel material, described FRP presstressed reinforcing steel material surface offers multiple grooves along burying length direction, in each groove, be fixed with a piezoelectric ceramic piece as driver, described FRP presstressed reinforcing steel material is wrapped with external coating the gauze wire cloth of epoxy resin layer, described gauze wire cloth surface uniform brushwork epoxy resin layer, described gauze wire cloth external surface is wound around the fiber strap that is impregnated with epoxy resin, described cloth belt surface is fixed with multiple piezoelectric ceramic pieces as sensor along burying length direction, all piezoelectric ceramic pieces as driver and all scribble waterproofing course as the piezoelectric ceramic piece surface of sensor, and be equipped with insulating layer between all piezoelectric ceramic pieces and described groove.
Described insulating waterproof layer material is epoxy resin, and described insulative water-proof layer thickness is 0.08～0.12mm.
The invention provides a kind of rib prestressed and damage monitoring device monitoring device of FRP of analyzing based on piezoelectric ceramics, comprise the compound FRP presstressed reinforcing steel of above-mentioned intelligent hybrid, the equal and function generator of described multiple piezoelectric ceramic pieces as sensor connects, the described piezoelectric ceramic piece as driver is all connected with data collecting instrument, described data collecting instrument access computer.
Between each piezoelectric ceramic piece as driver and data collecting instrument, be all connected to electric charge adapter.
The frequency of described function generator is 500H～10KHz.
Compared with prior art, the beneficial effect that the present invention has is: the present invention introduces piezoelectric ceramic piece in FRP presstressed reinforcing steel, can realize its dynamic stress of on-line monitoring and Complete Damage Process in loading process, be conducive to understand in time its duty, thereby reach monitoring object.Compared to common FRP presstressed reinforcing steel, the compound FRP presstressed reinforcing steel of this intelligent hybrid has the advantages such as real-time online self-monitoring; FRP presstressed reinforcing steel and gauze wire cloth in the compound FRP presstressed reinforcing steel of intelligent hybrid have extremely strong complementarity: the shear resistance of gauze wire cloth is strong, and the shear resistance of FRP presstressed reinforcing steel is poor, by resin, both are carried out compoundly, can strengthen the shear strength of FRP presstressed reinforcing steel; FRP presstressed reinforcing steel is a kind of fragile material simultaneously, and gauze wire cloth is a kind of elastic-plastic material, and the compound FRP presstressed reinforcing steel of intelligent hybrid has good ductility; In the compound FRP presstressed reinforcing steel of intelligent hybrid, related core FRP presstressed reinforcing steel adopts different types of fibers form with being wound around fiber strap, and fiber strap is wound around with the direction of two-way 45 °, can improve the ductility that this mixes FRP presstressed reinforcing steel; With respect to common FRP presstressed reinforcing steel, the compound FRP presstressed reinforcing steel of intelligent hybrid comprehensive mechanical property excellence, in composite reinforcing, the effect that mixes of fiber and gauze wire cloth makes it have the good feature such as ductile performance and shear behavior; The present invention has improved the ductile performance of FRP presstressed reinforcing steel, has improved the shear behavior of FRP presstressed reinforcing steel, makes FRP presstressed reinforcing steel not only can be used for the newly-built structure of civil structure, and can be applied to the strengthen of concrete structure and the damage monitoring of structure.
Brief description of the drawings
Fig. 1 is the compound FRP presstressed reinforcing steel of intelligent hybrid of the present invention material schematic diagram;
Fig. 2 is making schematic flow sheet of the present invention;
Fig. 3 is making of the present invention and forming process schematic diagram;
Fig. 4 is the establishment step schematic diagram of piezoelectric ceramics intelligent monitor system of the present invention.
Detailed description of the invention
As shown in Figure 1, the compound FRP presstressed reinforcing steel of one embodiment of the invention intelligent hybrid material comprises FRP presstressed reinforcing steel material 1, described FRP presstressed reinforcing steel material 1 surface offers multiple grooves along burying length direction, in each groove, be fixed with a piezoelectric ceramic piece 5 as driver, described FRP presstressed reinforcing steel material 1 is wrapped with external coating the gauze wire cloth 3 of epoxy resin layer, described gauze wire cloth 3 surface uniform brushwork epoxy resin layers, described gauze wire cloth 3 external surfaces are wound around the fiber strap 4 that is impregnated with epoxy resin, described fiber strap 4 surfaces are fixed with multiple piezoelectric ceramic pieces 2 as sensor along burying length direction, all piezoelectric ceramic pieces 5 as driver and all scribble waterproofing course as piezoelectric ceramic piece 2 surfaces of sensor, and be equipped with insulating layer between all piezoelectric ceramic pieces and described groove.
As shown in Figures 2 and 3, in the present invention, the preparation method of the compound FRP presstressed reinforcing steel of intelligent hybrid is as follows:
(1) in FRP presstressed reinforcing steel material 1 muscle, recessing place one side is arranged several piezoelectric ceramic pieces 5 as driver along burying length direction, and for example, with epoxide-resin glue (can adopt bisphenol A type epoxy resin) by packaged the piezoelectric ceramic piece 5 that is used as driver; Its further groove size is mated with piezoelectric ceramic piece size;
(2) gauze wire cloth of cutting out 3 is laid smooth, gauze wire cloth 3 one end bond to do temporary fixed with KH502 cementing agent and FRP presstressed reinforcing steel material 1, then even brushwork epoxy resin on gauze wire cloth 3, use subsequently the even rolling extrusion of roller, ensure that gauze wire cloth 3 is full with the resin-dipping of FRP presstressed reinforcing steel material 1 interface;
(3) other end of compression gauze wire cloth 3, slowly rotates FRP presstressed reinforcing steel material 1 from the one end boning with FRP presstressed reinforcing steel material 1 and applies and the axial vertical stretching force of FRP presstressed reinforcing steel 1, to realize the closely knit even parcel FRP presstressed reinforcing steel 1 of gauze wire cloth 3;
(4) axially squeeze and remove unnecessary resin along FRP presstressed reinforcing steel material 1, finally axially become miter angle to be wound around at the hoop of FRP presstressed reinforcing steel 1 with fiber strap 4 edges of flooding epoxy resin with muscle material.
(5) paste multiple piezoelectric ceramic pieces 2 as sensor on fiber strap 4 surfaces along burying length direction, just obtained the compound FRP presstressed reinforcing steel of intelligent hybrid.
As Fig. 4, the FRP muscle intelligent monitoring device preparation process that the present invention is based on piezoelectric ceramics analysis is as follows:
(1) in groove, paste the piezoelectric ceramic piece 5 as driver, paste multiple piezoelectric ceramic pieces 2 as sensor on fiber strap 4 surfaces along burying length direction, then the signal excitation being produced by signal function generator 6 is as the piezoelectric ceramic piece 2 of driver, the described piezoelectric ceramic piece 5 as receiver is connected with data collecting instrument 8, by data collecting instrument 8, data is reached to Computerized analysis system.
(2) the described piezoelectric ceramic piece 5 as receiver and data collecting instrument 8 are provided with electric charge adapter 7 between being connected.
(3) FRP presstressed reinforcing steel material 1 groove surfaces is provided with insulating layer in advance.
(4) be used as the piezoelectric ceramic piece 2 of sensor, stick on FRP presstressed reinforcing steel material 1 groove surfaces as the piezoelectric ceramic piece 5 of receiver, wire scribbles waterproofing course after connecting.
(5) frequency of the signal that described function generator 6 produces is 500Hz～10KHz.
(6) described insulating layer is the uniform epoxy resins insulation layer of one deck, and this thickness of insulating layer is controlled within the scope of 0.08～0.12mm.
Claims (8)
1. the compound FRP presstressed reinforcing steel of the intelligent hybrid based on a piezoelectric ceramics preparation method, is characterized in that, the method is:
1) offer multiple grooves on FRP presstressed reinforcing steel material surface along burying length direction, in groove, paste the piezoelectric ceramic piece as driver, and encapsulate piezoelectric ceramic piece with epoxide-resin glue;
2) by fixing gauze wire cloth one end and FRP presstressed reinforcing steel material bonding, gauze wire cloth is laid smooth, and on gauze wire cloth even brushwork epoxy resin, ensure the epoxy resin impregnated full of gauze wire cloth and FRP presstressed reinforcing steel material interface;
3) other end of compression gauze wire cloth, rotation FRP presstressed reinforcing steel material also applies and the axial vertical stretching force of FRP presstressed reinforcing steel material, makes the closely knit even parcel FRP presstressed reinforcing steel of gauze wire cloth;
4) axially squeeze and remove unnecessary epoxy resin along FRP presstressed reinforcing steel material, the fiber strap that flooded epoxy resin is wrapped on gauze wire cloth;
5) fix multiple piezoelectric ceramic pieces as sensor at cloth belt surface along burying length direction, obtain the compound FRP presstressed reinforcing steel of piezoelectric ceramics intelligent hybrid.
2. the compound FRP presstressed reinforcing steel of the intelligent hybrid based on piezoelectric ceramics according to claim 1 preparation method, is characterized in that, described fiber strap axially becomes miter angle with FRP presstressed reinforcing steel material.
3. one kind is utilized the compound FRP presstressed reinforcing steel of the intelligent hybrid based on piezoelectric ceramics that prepared by method described in claim 1, comprise FRP presstressed reinforcing steel material (1), it is characterized in that, described FRP presstressed reinforcing steel material (1) surface offers multiple grooves along burying length direction, in each groove, be fixed with a piezoelectric ceramic piece (5) as driver, described FRP presstressed reinforcing steel material (1) is wrapped with external coating the gauze wire cloth of epoxy resin layer (3), described gauze wire cloth (3) surface uniform brushwork epoxy resin layer, described gauze wire cloth (3) external surface is wound around the fiber strap (4) that is impregnated with epoxy resin, described fiber strap (4) surface is fixed with multiple piezoelectric ceramic pieces (2) as sensor along burying length direction, all piezoelectric ceramic pieces (5) as driver and all scribble waterproofing course as piezoelectric ceramic piece (2) surface of sensor, and be equipped with insulating layer between all piezoelectric ceramic pieces and described groove.
4. the compound FRP presstressed reinforcing steel of the intelligent hybrid based on piezoelectric ceramics according to claim 3, is characterized in that, described fiber strap axially becomes miter angle with FRP presstressed reinforcing steel material.
5. according to the compound FRP presstressed reinforcing steel of the intelligent hybrid based on piezoelectric ceramics described in claim 3 or 4, it is characterized in that, described insulating waterproof layer material is epoxy resin, and described insulative water-proof layer thickness is 0.08～0.12mm.
6. the rib prestressed and damage monitoring device of FRP of analyzing based on piezoelectric ceramics, it is characterized in that, comprise the compound FRP presstressed reinforcing steel of intelligent hybrid claimed in claim 5, described multiple piezoelectric ceramic piece (2) as sensor all and function generator (6) connects, the described piezoelectric ceramic piece (5) as driver is all connected with data collecting instrument (7), described data collecting instrument (8) access computer.
7. the rib prestressed or damage monitoring device of FRP of analyzing based on piezoelectric ceramics according to claim 6, is characterized in that, between each piezoelectric ceramic piece (5) as driver and data collecting instrument (8), is all connected to electric charge adapter (7).
8. or damage monitoring device rib prestressed according to the FRP analyzing based on piezoelectric ceramics described in claim 6 or 7, is characterized in that, the frequency of described function generator (6) is 500H～10KHz.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106226506A (en) * | 2016-08-18 | 2016-12-14 | 长沙理工大学 | The system of detection prestressed reinforced concrete construction corrosive crack and aggregate manufacture method |
| CN106638275A (en) * | 2016-12-16 | 2017-05-10 | 东南大学 | Self-circulating type piezoelectric material prestressed concrete box girder |
| CN106948488A (en) * | 2017-05-05 | 2017-07-14 | 长沙理工大学 | Preparation method, combination beam and the monitoring device of compound transfer structure for SRC beams |
| CN106970197A (en) * | 2017-05-05 | 2017-07-21 | 长沙理工大学 | A kind of CFRP plates reinforce the monitoring system and method in steel box-girder crack |
| CN108149574A (en) * | 2017-12-06 | 2018-06-12 | 长安大学 | A kind of intelligent strand tapered anchorage and prestressed monitoring method based on Piezoelectric Impedance method |
| CN108360743A (en) * | 2018-05-09 | 2018-08-03 | 长沙理工大学 | Built-in H profile steel prestressed concrete beam and preparation method and beam sliding monitoring device and method |
| CN108844820A (en) * | 2018-05-07 | 2018-11-20 | 武汉科技大学 | A kind of prestressed, reinforced self-test anchor ring based on the offset of Piezoelectric Impedance characteristic frequency |
| CN109142521A (en) * | 2018-07-27 | 2019-01-04 | 南京理工大学 | Steel Bridge Deck water-proof tack coat monitoring device and method based on piezoelectric transducer |
| CN109610735A (en) * | 2018-12-28 | 2019-04-12 | 东南大学 | It is a kind of distributed from monitoring prestressing force composite reinforcing based on long gauge length optical fibre grating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106226506A (en) * | 2016-08-18 | 2016-12-14 | 长沙理工大学 | The system of detection prestressed reinforced concrete construction corrosive crack and aggregate manufacture method |
| CN106638275A (en) * | 2016-12-16 | 2017-05-10 | 东南大学 | Self-circulating type piezoelectric material prestressed concrete box girder |
| CN106948488A (en) * | 2017-05-05 | 2017-07-14 | 长沙理工大学 | Preparation method, combination beam and the monitoring device of compound transfer structure for SRC beams |
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| CN109142521A (en) * | 2018-07-27 | 2019-01-04 | 南京理工大学 | Steel Bridge Deck water-proof tack coat monitoring device and method based on piezoelectric transducer |
| CN109610735A (en) * | 2018-12-28 | 2019-04-12 | 东南大学 | It is a kind of distributed from monitoring prestressing force composite reinforcing based on long gauge length optical fibre grating |
| CN109610735B (en) * | 2018-12-28 | 2024-05-14 | 东南大学 | Distributed self-monitoring prestress composite bar based on long gauge length fiber bragg grating |
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| Publication number | Publication date |
|---|---|
| CN103883076B (en) | 2016-02-10 |
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