CN203742192U - Fiber bragg grating fiber reinforced polymer continuous-pultrusion formed intelligent board - Google Patents
Fiber bragg grating fiber reinforced polymer continuous-pultrusion formed intelligent board Download PDFInfo
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- CN203742192U CN203742192U CN201320745149.3U CN201320745149U CN203742192U CN 203742192 U CN203742192 U CN 203742192U CN 201320745149 U CN201320745149 U CN 201320745149U CN 203742192 U CN203742192 U CN 203742192U
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Abstract
The utility model relates to a fiber bragg grating fiber reinforced polymer continuous-pultrusion formed intelligent board with double functions of civil engineering structure stress and self monitoring. The intelligent board comprises a board body made of fiber raw yarn and matrix resin, wherein the interior of the board body is filled with m pieces of sensing optical fiber containing fiber bragg grating sensors and pieces of transmission optical fiber, and m is an integral number not less than 1; n fiber bragg grating sensors are arranged on each single piece of sensing optical fiber, and n is an integral number not less than 1; the intelligent board is manufactured by adopting a continuous pultrusion forming technology, and has the fiber volume content not less than 60 percent. The intelligent board greatly facilitates accurate control of tensioning stress of fiber boards, compensation after loss of prestress and real-time monitoring to the reinforced structure during reinforcing and repairing of a concrete structure and a steel structure by fiber boards, especially prestress fiber boards.
Description
Technical field
The utility model relates to the intelligent civil engineering material of the stressed and monitoring of a kind of civil engineering structure, specifically a kind of have civil engineering structure stressed with from monitoring the continuously shaped intelligent plate of fiber grating fibre reinforced composites pultrusion of dual-use function.
Background technology
Fibre reinforced composites (Fiber Reinforced Polymer, be called for short FRP), by carbon fiber (Carbon Fiber), glass fiber (Glass Fiber) and aramid fiber (Aramid Fiber) contour performance fibers and matrix, be mainly resin (Polymer) system by a certain percentage and a kind of high-performance composite materials of making according to certain processing technology.Because it has, fabulous corrosion resistance, fatigue resistance, specific strength are high, the advantage such as convenient of constructing is widely used in field of civil engineering.It reinforces rehabilitating concrete structure, steel work has become the study hotspot that China's civil engineering field is new.
Fibrous composite form has a variety of, in long stapled composite material, for the maximum material forms of structure reinforcement and repair, is fibre reinforced composites sheet materials at present, comprises cloth and plate.Compare with cloth, fiberboard has homogenieity and good integrity, and section area is large, and modulus of elasticity is low, the advantage such as more convenient of constructing.Along with pre-stress fibre plate is reinforced the popularization of rehabilitating concrete structure, steel work technology and popularizes, the application prospect of fiber-reinforced composite material board can be more and more wide.
Pultrusion molding process is a kind of special process in fiber reinforced composite board moulding process, and its advantage is: manufacturing process is carried out continuously, and quality of item is stable, reproducible; Reinforcing material content can be adjusted as requested, and product strength is high; Longitudinal strength and the transverse strength that can adjust goods, meet different instructions for uses; Can produce the goods of cross sectional shape complexity, meet the requirement that special occasions is used; Goods have good globality, and raw-material utilization rate is high; The investment cost of equipment is low, is beneficial to formation industrialization.
But because fibre reinforced composites are linear elastic materials, not surrender in its destructive process, mode of failure is brittle fracture, in use destroys and there is no omen, this has reduced the safety of materials'use.And fibre reinforced composites, particularly pre-stress fibre reinforced composite are reinforced rehabilitating concrete structure, steel work technology still in the stage of fumbling, its durability needs the check of time, the structure of needing badly after making up and reinforcing after the accurate control, loss of prestress of carrying out the control stress for prestressing of fibre reinforced composites when reinforcing is implemented Real-Time Monitoring, for fibre reinforced composites, pre-stress fibre reinforced composite reinforce rehabilitating concrete structure, steel work complete set technology basic guarantee is provided.
In current disclosed patent, disclose the enhanced compound intelligent bar for optical fiber grating fiber that contains fiber-optic grating sensor, this intellectual rib only can reach the strain of perception line style, cannot be by the strain of single intellectual rib perception face type.This intellectual rib and the utility model intelligent plate in Structural Tectonics essence, application is essential with to reinforce efficiency all not identical in essence.In current disclosed document, in the making of < < FRP-FBG Intelligent Composite plate and sensor characteristics research > > thereof, mention " FRP-FBG Intelligent Composite plate ", but structurally there is essential difference in this Intelligent Composite plate and the utility model intelligent plate.
Summary of the invention
The technical problems to be solved in the utility model is: the continuously shaped intelligent plate of fiber grating fibre reinforced composites pultrusion that a kind of tool self-monitoring function is provided, when this intelligent plate is more convenient for fiberboard particularly pre-stress fibre plate is reinforced rehabilitating concrete structure, steel work, fiberboard is carried out stretch-draw time accurate control, the compensation after loss of prestress and reinforce after structure implement Real-Time Monitoring, solved above-mentioned problems of the prior art.
The technical scheme solving the problems of the technologies described above is: the continuously shaped intelligent plate of a kind of fiber grating fibre reinforced composites pultrusion, comprise the sheet material main body being formed by fiber raw yarn and matrix resin, it is characterized in that: in described sheet material main body, along machine direction, be filled with the sensor fibre that contains fiber-optic grating sensor and Transmission Fibers, the radical of described sensor fibre is m root, the integer of m >=1; On described single sensor fibre, be provided with n fiber-optic grating sensor, the integer of n >=1, the fiber volume fraction of this intelligent plate is not less than 60%.
Described sheet material body end leads to for connecting one section of Transmission Fibers of compensated optical fiber grating.
The value of the radical m of described sensor fibre and the number n of fiber-optic grating sensor is respectively: the integer of 10 >=m >=1, the integer of 60 >=n >=1.
The radical m of described sensor fibre is: the integer of 10 >=m >=3, described adjacent 2 sensor fibres are identical or not identical at the distance d1 of vertical fibers direction.
The value of the number n of described fiber-optic grating sensor is: the integer of 60 >=n >=3, on described single sensor fibre, adjacent 2 fiber-optic grating sensors are identical or not identical along the distance d2 of machine direction.
The length L of this intelligent plate, width D and thickness H are respectively: 200m >=L >=0.5m, 500mm >=D >=10mm, 10mm >=H >=1mm.
Described fiber raw yarn be in carbon fiber raw yarn, glass fiber raw yarn or aramid fiber raw yarn a kind of, two kinds, three kinds, described matrix resin be in unsaturated polyester resin, epoxy resin, vinyl vinegar resin, thermosetting first acrylic resin, phenol-formaldehyde resin modified or flame retardant resin a kind of, two or more.
This intelligent plate is to adopt pultrusion continuous forming process to make.
The continuously shaped intelligent plate of fiber grating fibre reinforced composites pultrusion of the utility model and the essential distinction of the existing enhanced compound intelligent bar for optical fiber grating fiber that contains fiber-optic grating sensor are as follows.
(1) Structural Tectonics is inconsistent
The fiber grating of intellectual rib and Transmission Fibers are laid along fiber reinforced plastic rod length direction, are limited by the intrinsic elongated form of muscle material, and intellectual rib can only the strain of perception line style, cannot be by the strain of single intellectual rib perception face type.
The fiber grating of intelligent plate and Transmission Fibers are filled in fiber enhanced plastic plate material internal along machine direction, and broad ways is laid and to be more than or equal to 1 as required, can realize structure strain monitoring and the perceptional function of point, line, surface arbitrarily by 1 intelligent plate.
(2) application is inconsistent
Intellectual rib main application fields: replace the middle silk of steel strand, make intelligent steel strand; Replace the part high tensile steel wire of drag-line and make smart stay cable; Some or all of alternative reinforcing bar, for some building, structure in particular surroundings, forms FRP tendon concrete structure or prestressed reinforced concrete construction.Aspect reinforcing: directly external bonding is stressed for muscle material, can embed in the concrete structure of surface fluting, form embedded prestressing force or non-prestressed reinforced concrete structure; Alternative steel strand, cable wire, carry out structure tensile region prestressed reinforcement.
Intelligent plate main application fields: for all kinds of structural strengthening; Belong to platy structure, long-pending large with structure interface, be applicable to any enclosed structure and complex-shapedly wait the reinforcing of special construction shape; Can select as required to paste the multiple combination reinforcing modes such as non-prestressed reinforcing, the nothing non-prestressed reinforcing of bonding or binding prestress reinforcing; Both insertion type was reinforced and also can externally be reinforced; Intelligent plate not only can be reinforced for tensile region, can also be for preventing the reinforcing of structure pressurized unstability.
(3) reinforcing efficiency is inconsistent
Intellectual rib cross-sectional form is mainly circular or square, and sectional area is less, and intelligent plate as required design section size form different-thickness and width sheet material.At bearing capacity, contribute identical in the situation that, anchor clamp quantity that intelligent plate need be used than intellectual rib is few, cost is low, and it is easier to lay, and reinforces efficiency higher.
" FRP-FBG Intelligent Composite plate " essential distinction of mentioning in the making of the continuously shaped intelligent plate of fiber grating fibre reinforced composites pultrusion of the utility model and current open source literature < < FRP-FBG Intelligent Composite plate and sensor characteristics research > > thereof is as follows.
(1) " FRP-FBG Intelligent Composite plate " consists of 6 layers of stitch-bonded felt, and FBG sensor is embedded in the 3rd layer and the 4th interlayer along 0 ° of machine direction, and the final laying structure of FRP-FBG Intelligent Composite plate is Symmetric Orthogonal laminate.This composite plate adopts hand paste mode to make, and for preventing FBG slippage in manufacturing process, can utilize bonding adhesive that FBG is bonded on stitch-bonded felt.This Intelligent Composite plate adopts hand to stick with paste technique and lays by layering the laminate with layer structure that fiber cloth becomes, at cloth interlayer, imbed single FBG sensor, in fact the stacked of cloth, it is a kind of packing forms of fiber-optic grating sensor, belong to low pressure contact moudling technique, there is hand and stick with paste technique inherent shortcoming, use does not possess mechanical characteristic separately, can not carry separately, can not be as structural meterials for structural strengthening, its fiber-optic grating sensor position is specific, usually used as sensor, uses.Its make efficiency is low, can not produce in enormous quantities; Product poor repeatability, quality is unstable; Fiber content is low, and stress performance is poor; Grating is laid quantity and position can only be specific, and application is limited to.
(2) the continuously shaped intelligent plate of fiber grating fibre reinforced composites pultrusion of the utility model, what its preparation adopted is pultrude process, and automaticity is high, steady quality, fiber grating can freely be selected locus, is a kind of whole sheet material of disposal molding; Can produce as required the continuous sheet material of different size cross sectional shape; Fiber content is high, and stress performance is good, and fibre strength can be not fully exerted, and can be used for prestressed reinforcement; The continuously shaped intelligent plate of fiber grating fibre reinforced composites pultrusion of the utility model itself is exactly a kind of loading material that has good stress performance, can realize the strain monitoring to structure point, line, surface according to different fiber grating arrangement forms simultaneously, be integrate stressed with from perception, the structure intelligent reinforcement material of certainly monitoring, according to the Changing Pattern of optic fiber grating wavelength in intelligent plate, obtain and reinforce the strain information of repairing position, and can inquire into and learn corresponding stress data, and then realize the safe early warning of structure and Gernral Check-up.
In sum, the continuously shaped intelligent plate of fiber grating fibre reinforced composites pultrusion of the utility model had both had fabulous corrosion resistance and fatigue resistance, specific strength is high, the convenient carbon fibre reinforced plastic inherent characteristics that waits of constructing, be a kind of advanced person's collection stressed with from perception, from the structure intelligent reinforcement material of monitoring in one, be more convenient for fiberboard particularly pre-stress fibre plate reinforce rehabilitating concrete structure, during steel work, fiberboard is carried out stretch-draw time accurate control, structure after compensation after loss of prestress and reinforcing is implemented Real-Time Monitoring, be more convenient for applying.
FRP repairing technique is by common stickup or apply prestressed mode and add and be affixed to structural deterioration damage location to complete a kind of high efficiency of structure repair, advanced configuration restorative procedure cheaply by FRP material.Fibre reinforced composites (FRP) rely on its excellent performance to become the field advanced persons' such as civil engineering structure, aerospace vehicle, weapon equipment, Ship Structure, pressure vessel, steel storage tank, conveyance conduit, electronic equipment, sports apparatus the leading recovery technique of defect.FRP material is from heavy and light, and specific strength and specific stiffness are high, does not substantially increase the deadweight of original structure and the size of former member after reparation; There is good anti-fatigue performance and decay resistance, can effectively improve defect component stress under dynamic load environment and concentrate and carrying situation, the corrosive mediums such as acid, alkali, salt are had to good resistance to corrosion; Need be at the damage location regional opening of mother metal in reparation, to mother metal bearing cross-section substantially without weakening.
Compare with traditional structure repair method, the continuously shaped intelligent plate repair structure of the fiber grating fibre reinforced composites pultrusion technology of the utility model has obvious advantage, is described below in detail:
(1) the continuously shaped intelligent plate of fiber grating fibre reinforced composites pultrusion of the utility model itself be exactly integrate stressed with from perception, the structure intelligent reinforcement material of certainly monitoring, according to the Changing Pattern of reinforcement optic fiber grating wavelength, obtain and reinforce strain and the stress information of repairing position, realize the safe early warning of structure and Gernral Check-up.
(2) FRP material is from heavy and light, and mechanical property is superior, and specific strength and specific stiffness are high, and autologous density is little, does not substantially increase the deadweight of original structure and the size of former member after reparation.
(3) FRP has designability, formability, for repairing the complex-curved structures such as pressure vessel, pipeline, containment, has special advantage;
(4) FRP has good anti-fatigue performance, can improve defect component stress under dynamic load environment and concentrate and carrying situation, effectively stops the continuation expansion of crackle, thereby improves the anti-fatigue performance of structure;
(5) little to mother metal damage, do not need, to mother metal boring, mother metal bearing cross-section, substantially without weakening, not to be destroyed to the globality of original structure, can not form new stress raiser, avoided the generation of new limit, hole crackle.Do not increase new weld seam, can not produce residual stress, can not form new Crack Fatigue source;
(6) FRP itself has good decay resistance to corrosive mediums such as acid, alkali, salt, flexible FRP repairs any enclosed structure and the complex-shaped body structure surface that is repaired, there are good interfacial bond property, sealing with metal surface, reduce the hidden danger that seepage is even corroded, seldom occurred anticaustic breakoff phenomenon.
(7) the method is constructed without large-scale special equipment, simple and easy to do, and cost is low, and efficiency is high, is particularly suitable for field repair, welding naked light in work progress, and the on-the-spot main normal temperature cure construction technology that adopts, safe and reliable, little impact on production.
Therefore, pasting FRP repaired steel-structure technology is a kind of rising new structure recovery technique, have broad application prospects, it can be applied to the reparation of crackle reparation, steel structure bridge and building and the fault of construction reparation of Ship Structure, pressure vessel, conveyance conduit and steel tank etc. of airframe.
Below, in conjunction with the accompanying drawings and embodiments the technical characterictic of the continuously shaped intelligent plate of a kind of fiber grating fibre reinforced composites pultrusion of the utility model is further described.
Accompanying drawing explanation
Fig. 1-Fig. 4: the continuously shaped intelligent plate of fiber grating fibre reinforced composites pultrusion of the utility model is sectional view along its length.
Fig. 1: be provided with 1 fiber-optic grating sensor on single sensor fibre.
Fig. 2: be provided with 2 fiber-optic grating sensors on single sensor fibre.
Fig. 3: be provided with 3 fiber-optic grating sensors (on single sensor fibre, adjacent 2 fiber-optic grating sensors are identical along the distance d2 of machine direction) on single sensor fibre.
Fig. 4: be provided with 3 fiber-optic grating sensors (on single sensor fibre, adjacent 2 fiber-optic grating sensors are not identical along the distance d2 of machine direction) on single sensor fibre.
Fig. 5-Fig. 8: the continuously shaped intelligent plate broad ways of the fiber grating fibre reinforced composites pultrusion sectional view of the utility model.
Fig. 5: be provided with 1 sensor fibre.
Fig. 6: be provided with 2 sensor fibres (2 sensor fibres are different to the distance of plate face).
Fig. 7: be provided with 3 sensor fibres (adjacent 2 sensor fibres are identical at the distance d1 of vertical fibers direction, and 3 sensor fibres are different to the distance of plate face).
Fig. 8: be provided with 3 sensor fibres (adjacent 2 sensor fibres are not identical at the distance d1 of vertical fibers direction).
Fig. 9-Figure 11: the continuously shaped intelligent plate schematic diagram of fiber grating fibre reinforced composites pultrusion of the utility model.
Fig. 9: adjacent 2 sensor fibres adjacent 2 fiber-optic grating sensors on the distance d1 of vertical fibers direction and single sensor fibre are all identical along the distance d2 of machine direction.
Figure 10: adjacent 2 sensor fibres are identical at the distance d1 of vertical fibers direction, on single sensor fibre, adjacent 2 fiber-optic grating sensors are not identical along the distance d2 of machine direction.
Figure 11: adjacent 2 sensor fibres adjacent 2 fiber-optic grating sensors on the distance d1 of vertical fibers direction and single sensor fibre are all not identical along the distance d2 of machine direction.
In figure: 1-sheet material main body, 2-sensor fibre, 21-fiber-optic grating sensor, 22-Transmission Fibers.
The specific embodiment
Embodiment 1: the continuously shaped intelligent plate of a kind of fiber grating fibre reinforced composites pultrusion, as shown in Figure 9, comprise the sheet material main body 1 being formed by fiber raw yarn and matrix resin, in described sheet material main body, along machine direction, be filled with the sensor fibre 2 that contains fiber-optic grating sensor 21 and Transmission Fibers 22, the radical of described sensor fibre is m root, m=3; On described single sensor fibre, be provided with n fiber-optic grating sensor, n=3, the grating sensor string with certain length interval that fiber-optic grating sensor is welding.Adjacent 2 sensor fibres adjacent 2 fiber-optic grating sensors on the distance d1 of vertical fibers direction and single sensor fibre are all identical along the distance d2 of machine direction.Described sheet material body end leads to for connecting one section of Transmission Fibers of compensated optical fiber grating.This intelligent plate is to adopt pultrusion continuous forming process to make, and the fiber volume fraction of this intelligent plate is not less than 60%.
Embodiment 2: the continuously shaped intelligent plate of a kind of fiber grating fibre reinforced composites pultrusion, as shown in figure 10, comprise the sheet material main body 1 being formed by fiber raw yarn and matrix resin, in described sheet material main body, along machine direction, be filled with the sensor fibre 2 that contains fiber-optic grating sensor 21 and Transmission Fibers 22, the radical of described sensor fibre is m root, m=3; On described single sensor fibre, be provided with n fiber-optic grating sensor, n=2 or 3.Adjacent 2 sensor fibres are identical at the distance d1 of vertical fibers direction, and on single sensor fibre, adjacent 2 fiber-optic grating sensors are not identical along the distance d2 of machine direction.Described sheet material body end leads to for connecting one section of Transmission Fibers of compensated optical fiber grating.This intelligent plate is to adopt pultrusion continuous forming process to make, and the fiber volume fraction of this intelligent plate is not less than 60%.
Embodiment 3: the continuously shaped intelligent plate of a kind of fiber grating fibre reinforced composites pultrusion, as shown in figure 11, comprise the sheet material main body 1 being formed by fiber raw yarn and matrix resin, in described sheet material main body, along machine direction, be filled with the sensor fibre 2 that contains fiber-optic grating sensor 21 and Transmission Fibers 22, the radical of described sensor fibre is m root, m=3; On described single sensor fibre, be provided with n fiber-optic grating sensor, n=2 or 3.Adjacent 2 sensor fibres adjacent 2 fiber-optic grating sensors on the distance d1 of vertical fibers direction and single sensor fibre are all not identical along the distance d2 of machine direction.Described sheet material body end leads to for connecting one section of Transmission Fibers of compensated optical fiber grating.This intelligent plate is to adopt pultrusion continuous forming process to make, and the fiber volume fraction of this intelligent plate is not less than 60%.
Fiber raw yarn described in embodiment 1-embodiment 3 be in carbon fiber raw yarn, glass fiber raw yarn or aramid fiber raw yarn a kind of, two or three, described matrix resin be in unsaturated polyester resin, epoxy resin, vinyl vinegar resin, thermosetting first acrylic resin, phenol-formaldehyde resin modified or flame retardant resin a kind of, two or more.
The length L of the intelligent plate described in embodiment 1-embodiment 3, width D and thickness H can, according to actual conditions arbitrary decision, be generally: 200m >=L >=0.5m, 500mm >=D >=10mm, 10mm >=H >=1mm.
A kind of conversion as the present embodiment 1-embodiment 3, the fiber-optic grating sensor number n arranging on the radical m of described sensor fibre and described single sensor fibre can increase or reduce according to actual conditions, as long as meet the integer of m >=1, the integer of n >=1, be generally the integer of 10 >=m >=1, the integer of 60 >=n >=1.Described sensor fibre can arbitrary decision in the distance of vertical fibers direction, position (be sensor fibre to the distance of plate face can be identical also can be not identical), and the fiber-optic grating sensor arranging on described single sensor fibre can arbitrary decision along the spacing of machine direction.The layout of sensor fibre and fiber-optic grating sensor is mainly the location positioning that need to monitor while using according to reality.
Claims (6)
1. the continuously shaped intelligent plate of fiber grating fibre reinforced composites pultrusion, comprise the sheet material main body being formed by fiber raw yarn and matrix resin, it is characterized in that: in described sheet material main body, along machine direction, be filled with the sensor fibre that contains fiber-optic grating sensor and Transmission Fibers, the radical of described sensor fibre is m root, the integer of m >=1; On described single sensor fibre, be provided with n fiber-optic grating sensor, the integer of n >=1.
2. the continuously shaped intelligent plate of fiber grating fibre reinforced composites according to claim 1 pultrusion, is characterized in that: described sheet material body end leads to for connecting one section of Transmission Fibers of compensated optical fiber grating.
3. the continuously shaped intelligent plate of fiber grating fibre reinforced composites according to claim 1 and 2 pultrusion, it is characterized in that: the value of the radical m of described sensor fibre and the number n of fiber-optic grating sensor is respectively: the integer of 10 >=m >=1, the integer of 60 >=n >=1.
4. the continuously shaped intelligent plate of fiber grating fibre reinforced composites according to claim 3 pultrusion, it is characterized in that: the radical m of described sensor fibre is: the integer of 10 >=m >=3, described adjacent 2 sensor fibres are identical or not identical at the distance d1 of vertical fibers direction.
5. the continuously shaped intelligent plate of fiber grating fibre reinforced composites according to claim 3 pultrusion, it is characterized in that: the value of the number n of described fiber-optic grating sensor is: the integer of 60 >=n >=3, on described single sensor fibre, adjacent 2 fiber-optic grating sensors are identical or not identical along the distance d2 of machine direction.
6. the continuously shaped intelligent plate of fiber grating fibre reinforced composites according to claim 1 and 2 pultrusion, is characterized in that: the length L of this intelligent plate, width D and thickness H are respectively: 200m >=L >=0.5m, 500mm >=D >=10mm, 10mm >=H >=1mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758326A (en) * | 2016-05-05 | 2016-07-13 | 智性纤维复合加固南通有限公司 | Distributed optical fiber ribbon for deformation monitoring and preparation method thereof |
| EP3601783B1 (en) | 2017-05-09 | 2022-04-06 | Siemens Gamesa Renewable Energy A/S | Wind turbine rotor blade with embedded sensors |
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2013
- 2013-11-22 CN CN201320745149.3U patent/CN203742192U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758326A (en) * | 2016-05-05 | 2016-07-13 | 智性纤维复合加固南通有限公司 | Distributed optical fiber ribbon for deformation monitoring and preparation method thereof |
| EP3601783B1 (en) | 2017-05-09 | 2022-04-06 | Siemens Gamesa Renewable Energy A/S | Wind turbine rotor blade with embedded sensors |
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