CN109406582A - A kind of Structure Damage Identification using carbon fiber change in resistance - Google Patents
A kind of Structure Damage Identification using carbon fiber change in resistance Download PDFInfo
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- CN109406582A CN109406582A CN201811626147.6A CN201811626147A CN109406582A CN 109406582 A CN109406582 A CN 109406582A CN 201811626147 A CN201811626147 A CN 201811626147A CN 109406582 A CN109406582 A CN 109406582A
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 72
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 72
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 230000008859 change Effects 0.000 title claims abstract description 29
- 230000006378 damage Effects 0.000 title claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 230000003862 health status Effects 0.000 claims abstract description 26
- 238000003491 array Methods 0.000 claims abstract description 12
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 6
- 230000002427 irreversible effect Effects 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 4
- -1 phenolic aldehyde Chemical class 0.000 claims description 3
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 3
- 239000010426 asphalt Substances 0.000 claims description 2
- 238000010422 painting Methods 0.000 claims 1
- 238000004458 analytical method Methods 0.000 abstract description 3
- 239000004744 fabric Substances 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 206010052428 Wound Diseases 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000001028 reflection method Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention belongs to technical field of analysis and detection more particularly to a kind of Structure Damage Identifications using carbon fiber change in resistance.The building structure includes building body, rubberised layer, carbon fiber board, and the rubberised layer is coated in the surface of building body, and the carbon fiber board is bonded on rubberised layer.Described device includes electrode, binding post, voltmeter, power supply, measuring resistance, switch and pedestal etc.；The electrode is symmetricly set on the two sides of pedestal, is provided with voltmeter on the electrode；The binding post is symmetricly set on the two sides of pedestal, be provided between the two arrays of electrodes by conducting wire connection DC power supply, measuring resistance, the both ends of the measuring resistance are provided with voltmeter, switch are provided on the conducting wire.The problem of it is inaccurate that the present invention overcomes detected values caused by the nonlinear problem of carbon fiber board resistance variations caused by the variation of building structure when detecting, and cannot really react building structure health status.
Description
Technical field
The invention belongs to technical field of analysis and detection more particularly to a kind of structural damage inspections using carbon fiber change in resistance
Survey method.
Background technique
Now, people increasingly pay attention to the safety detection of Important Project.The damage product of large scale structure and infrastructure
Tired and catastrophe behavior becomes increasingly conspicuous.Inevitably cause under the action of various catastrophe factors in the use process of building structure
The damage accumulation and degradation resistance of structure, are destroyed so as to cause structure, or even cause catastrophic burst accident.
Concrete is the structural material being most widely used in civil engineering at present, and general to the detection of concrete structure
It is all to use the methods of sound, light, electricity, magnetic and ray, the physical quantity in terms of measuring in relation to concrete performance estimates the strong of concrete
Degree, density, uniformity and existing defect etc..General detection method include rebound method, supercritical ultrasonics technology, ray method and
Vertical reflection method etc., but these methods have defect to a certain extent, and rebound method is only used for the quality of detection concrete surface；
The data of supercritical ultrasonics technology test are influenced more obvious by coupling condition and reinforcing bar；Vertical reflection method requires reflection focus and receives inspection
Wave device must have short aftershock characteristic, and to resolve high frequency and it is high-power between contradiction；The identification of radar method echo-signal
Degree is influenced by reinforcement in concrete.
Carbon fiber is now used for building structure health detection, carbon fibre material itself has good electric conductivity, has oneself
Conductive grid, when material itself damages, conductive grid is slowly destroyed, under the electric conductivity so as to cause itself
Drop will make the resistance of material itself that irreversible rising occur.For example, patent document 201410051693.7 discloses one kind
From monitoring smart fabric enhancing concrete and preparation method thereof, on carbon fiber during TRC production in fabric web
Adhesive electrode；By the variation of dynamic detection intelligence TRC resistivity, to regional stress each in structure, strain conditions and distribution
Monitoring.However, there are some problems for this detection method.When structure is deformed by extraneous external force, length-width ratio can occur
Variation, delamination failure, fracture can occur for carbon cloth at this time, its Conducting forms is caused to change, and the variation of resistance is not with answering
Time-varying Linear Systems variation, the case where not can accurately reflect when structural break destroys.
Summary of the invention
It is a kind of using carbon fiber change in resistance the present invention intends to provide for above-mentioned problems of the prior art
Structure Damage Identification.The present invention does not detect the health status and damage of building structure merely with the variation of carbon fiber electrically resistance
The development of wound；And it overcomes really react as brought by non-linear resistance variation in detection process and builds knot
The problem of structure health status.Meanwhile the carbon fiber board that the present invention uses has preferable strength and stiffness, can tie simultaneously to building
Structure plays the role of reinforcement.
An object of the present invention is to provide a kind of building structure suitable for carbon fiber change in resistance detection health status.
The second object of the present invention is to provide a kind of dress using carbon fiber change in resistance detection building structure health status
It sets.
The third object of the present invention is to provide the above-mentioned dress using carbon fiber change in resistance detection building structure health status
The application set.
For achieving the above object, the invention discloses following technical proposals:
Firstly, the invention discloses a kind of building structure suitable for carbon fiber change in resistance detection health status, including
Building body, rubberised layer and carbon fiber board, the rubberised layer are coated in the surface of building body, and the carbon fiber board is bonded in rubberised layer
On；The rubberised layer is epobond epoxyn.
Further, the material of the carbon fiber board includes polyacrylonitrile-based carbon fibre, asphalt base carbon fiber or phenolic aldehyde base
Carbon fiber etc..
Carbon fiber board is pasted onto building by this building structure of the invention using glue like epoxy resin adhesive, not only
Carbon fiber board delamination failure in detection process can be prevented, nonlinear change occurs for resistance value, and caused detected value is inaccurate, no
The problem of health status of building structure can really be reacted, because what is used in the prior art direct pastes carbon cloth point multilayer
It closes when the method on building body destroys structure, the resistance value of carbon cloth is easy to appear nonlinear change, to structure
Failure analysis be easy to cause influence.Existing TRC building structure, the either complexity of preparation process, cost, or construction
Convenience all not as good as advantage of the present invention, this building structure of the invention can carry out carbon fiber board at the scene as needed
Arrangement prevented conveniently meanwhile, it is capable to guarantee the synchronism between the variation of building structure and the variation of carbon fiber board
There is the nonlinear problem of carbon fiber board resistance variations, it is ensured that the accuracy of testing result.In addition, carbon fiber board of the invention is simultaneously
It is not embedded in inside building body as TRC, can directly detect knot between the two in the visual inspection in later period in this way
Closing situation can be repaired in time if having phenomena such as bonding falls off, and be avoided same between building body and carbon fiber board
Step property is affected, so as to cause testing result inaccuracy.
Secondly, the invention discloses a kind of device using carbon fiber change in resistance detection building structure health status, packet
Include electrode, binding post, first voltage table, DC power supply, second voltage table, measuring resistance, switch and pedestal.
The electrode is two groups, is symmetricly set on the two sides of pedestal, first voltage table is provided on the electrode.Detection
When, the two arrays of electrodes is connected to the both ends of the carbon fiber board in building structure of the present invention respectively.
The binding post is two groups, is symmetricly set on the two sides of pedestal, is provided between the two arrays of electrodes and is connected by conducting wire
The DC power supply that connects, measuring resistance, the both ends of the measuring resistance are provided with second voltage table, are provided with out on the conducting wire
It closes.When detection, two arrays of electrodes is connected with two groups of binding posts respectively with conducting wire.
Again, the present invention discloses a kind of method using carbon fiber change in resistance detection building structure health status, including
Following steps:
(1) two arrays of electrodes is connected to the both ends of the carbon fiber board in building structure of the present invention respectively first, so
Two arrays of electrodes is connected with two groups of binding posts respectively with conducting wire afterwards, closure switch start to detect；
(2) by the resistance value of record carbon fiber board, the change curve of resistance is drawn, can clearly reflect that structure is sent out
The process of raw deformation failure illustrates that more serious destruction has occurred for structure when irreversible rising sharply occurs for resistance.
Monitoring to building structure is mainly the bending damaged condition under structure stress effect.Carbon fiber board and building structure
It combines closely, when bending damage occurs under the extraneous various factors that can not resist for structure, the destruction such as crack occurs, while also can
Cause carbon fiber board is synchronous to damage, according to the degree of damage, its conductive grid is made different degrees of destruction occur, thus
Resistance is caused to increase.
Finally, the invention discloses the above-mentioned devices using carbon fiber change in resistance monitoring building structure health status to build
Build the application in engineering field.
Compared with prior art, the present invention achieve it is following the utility model has the advantages that
(1) carbon fiber board is pasted onto building by this building structure of the invention using glue like epoxy resin adhesive,
It can prevent the nonlinear problem of carbon fiber board resistance variations caused by the variation of building structure in detection process, caused inspection
The problem of measured value is inaccurate, cannot really react the health status of building structure.
(2) carbon fiber board not only has satisfactory electrical conductivity performance, can with outside detection structure health status, carbon fiber board it is strong
Degree and rigidity can also play reinforcing effect, extending structure service life to structure, and not change the shape and weight of structure.
(3) present invention can observe carbon at the initial stage of using by the way that carbon fiber board to be arranged in the outside of building body by visual observation
The shape of fiberboard observes the bonding situation of carbon fiber board and structure；At structural damage initial stage, there is slight damage in carbon fiber board
Wound, resistance value have a small increase；When the degree of injury of structure reaches destruction, when structure is broken, then carbon fiber board can also go out
It now bends, conductive grid is seriously damaged, and resistance value greatly increases, and irreversible rising occurs, and deformation is in destruction at this time
State.
(4) present invention avoids tradition using the degree of impairment of the variation detection building structure bending of carbon fiber electrically resistance value
The various defects of method do not have to collect great amount of samples data, and monitoring result is by the interference of the materials such as inside configuration reinforcing bar, outside
The influence interference of boundary's condition is also smaller, as a result accurately, meanwhile, the present invention realizes the real-time detection to building structure, collects
Mass data material provides reliable data for later structure optimization, research.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the structural schematic diagram that the present invention is suitable for that carbon fiber change in resistance detects the building structure of health status.
Fig. 2 is the structural schematic diagram for the device that the present invention detects building structure health status using carbon fiber change in resistance.
Attached drawing acceptance of the bid note respectively represents: 1- building body, 2- rubberised layer, 3- carbon fiber board, 4- electrode, 5- binding post, 6- the
One voltmeter, 7- DC power supply, 8- second voltage table, 9- measuring resistance, 10- switch, 11- pedestal, 12- conducting wire.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As described in background, inevitable under the action of various catastrophe factors in the use process of building structure
The damage accumulation and degradation resistance for leading to structure, are destroyed so as to cause structure, or even cause catastrophic burst accident.Cause
This, the invention proposes a kind of device and methods using carbon fiber change in resistance detection building structure health status；Now in conjunction with
The drawings and the specific embodiments are further illustrated the present invention.
Embodiment 1
As shown in Figure 1, a kind of building structure suitable for carbon fiber change in resistance detection health status, including building body 1,
Rubberised layer 2 and carbon fiber board 3, the rubberised layer 2 are coated in the surface of building body 1, and the carbon fiber board 3 is bonded in rubberised layer 2
On；2 layers of the gluing are epobond epoxyn.Carbon fiber board is utilized glue like epoxy resin by this building structure of the invention
Adhesive is pasted onto building, and carbon fiber board resistance variations caused by the variation of building structure in detection process can be prevented non-thread
Property the problem of, caused detected value inaccuracy, the problem of cannot really reacting the health status of building structure.
Embodiment 2
As shown in Figure 1, a kind of building structure suitable for carbon fiber change in resistance detection health status, including building body 1,
Rubberised layer 2 and carbon fiber board 3, the rubberised layer 2 are coated in the surface of building body 1, and the carbon fiber board 3 is bonded in rubberised layer 2
On；2 layers of the gluing are epobond epoxyn.The material of the carbon fiber board includes polyacrylonitrile-based carbon fibre, asphaltic base
Carbon fiber or phenolic aldehyde base carbon fibre etc..
Embodiment 3
As shown in Fig. 2, a kind of device using carbon fiber change in resistance detection building structure health status, including electrode 4,
Binding post 5, first voltage table 6, DC power supply 7, second voltage table 8, measuring resistance 9, switch 10 and pedestal 11.
The electrode 4 is two groups, is symmetricly set on the two sides of pedestal 11, first voltage table 6 is provided on the electrode.Inspection
When survey, the two arrays of electrodes is connected to the both ends of the carbon fiber board 3 in building structure described in embodiment 1 respectively.
The binding post 5 is two groups, is symmetricly set on the two sides of pedestal 11, is provided between the two arrays of electrodes by conducting wire
The DC power supply 7 of connection, measuring resistance 9, the both ends of the measuring resistance 9 are provided with second voltage table 8, are arranged on the conducting wire
There is switch 10.When detection, two arrays of electrodes is connected to two groups of binding posts respectively with conducting wire 12.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for those skilled in the art
For member, various changes and changes are possible in this application.Within the spirit and principles of this application, it is made it is any modification,
Equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (6)
1. a kind of building structure suitable for carbon fiber change in resistance detection health status, which is characterized in that the building structure
Including building body, rubberised layer, carbon fiber board, the rubberised layer is coated in the surface of building body, and the carbon fiber board is bonded in painting
On glue-line；The rubberised layer is epobond epoxyn.
2. being suitable for the building structure of carbon fiber change in resistance health status as described in claim 1, which is characterized in that described
The material of carbon fiber board includes polyacrylonitrile-based carbon fibre, asphalt base carbon fiber or phenolic aldehyde base carbon fibre etc..
3. a kind of device for detecting building structure health status as described in claim 1 using carbon fiber change in resistance, feature
It is, described device includes electrode, binding post, first voltage table, DC power supply, second voltage table, measuring resistance, switch and bottom
Seat；
The electrode is two groups, is symmetricly set on the two sides of pedestal, first voltage table is provided on the electrode；
The binding post is two groups, is symmetricly set on the two sides of pedestal, is provided between the two arrays of electrodes by conducting wire connection
DC power supply, measuring resistance, the both ends of the measuring resistance are provided with second voltage table, switch are provided on the conducting wire.
4. utilizing the method for device as claimed in claim 3 detection building structure health status, which is characterized in that including walking as follows
It is rapid:
(1) two arrays of electrodes is connected to the both ends of the carbon fiber board in building structure of any of claims 1 or 2 respectively first,
Then two arrays of electrodes is connected with two groups of binding posts respectively with conducting wire, closure switch start to detect；
(2) by the resistance value of record carbon fiber board, the change curve of resistance is drawn, can clearly reflect that structure becomes
The process that shape is destroyed, when irreversible rising sharply occurs for resistance, i.e., more serious destruction has occurred for structure.
5. being led as claimed in claim 1 or 2 suitable for the building structure of carbon fiber change in resistance health status in architectural engineering
Application in domain.
6. as claimed in claim 3 using the device of carbon fiber change in resistance detection building structure health status in architectural engineering
Application in field.
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| CN201811626147.6A CN109406582A (en) | 2018-12-28 | 2018-12-28 | A kind of Structure Damage Identification using carbon fiber change in resistance |
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| CN201811626147.6A CN109406582A (en) | 2018-12-28 | 2018-12-28 | A kind of Structure Damage Identification using carbon fiber change in resistance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049640A (en) * | 2021-03-03 | 2021-06-29 | 吉林大学 | Bionic fiber composite material with real-time damage monitoring function and preparation method thereof |
| CN114687047A (en) * | 2022-05-07 | 2022-07-01 | 浙江理工大学 | Method for monitoring damage of carbon fiber weaving process |
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