CN108868184A - A kind of carbon fiber reinforcement steel construction and detection method - Google Patents
A kind of carbon fiber reinforcement steel construction and detection method Download PDFInfo
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- CN108868184A CN108868184A CN201810622060.5A CN201810622060A CN108868184A CN 108868184 A CN108868184 A CN 108868184A CN 201810622060 A CN201810622060 A CN 201810622060A CN 108868184 A CN108868184 A CN 108868184A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- G—PHYSICS
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- 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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Abstract
The present invention provides a kind of carbon fiber reinforcement steel construction, including ruggedized construction ontology, and ruggedized construction ontology includes steel plate layer, carbon fiber layer；Ruggedized construction ontology further includes conductive tie layers；Conductive tie layers are made of electroconductive binder；Steel plate layer and carbon fiber layer are connected as one by conductive tie layers, conductive tie layers electrically conduct steel plate layer and carbon fiber layer.The invention further relates to a kind of carbon fiber reinforcement steel detection methods.The present invention utilizes the conductive characteristic of conductive adhesive itself, detection and safe early warning are carried out come the deformation damage in the life cycle management of the structure to carbon fiber reinforcement steel by detecting resistance variations caused by the deformation of ruggedized construction ontology, to achieve the purpose that self-test.The present invention realizes the detection in long-term life cycle management, and low in cost, while without using additional detection technique, only electrode need to be arranged on carbon fiber and steel, detection can be completed in measurement resistance, and versatility is good, and has the advantages that simple process and harmless.
Description
Technical field
The present invention relates to a kind of steel construction more particularly to a kind of carbon fiber reinforcement steel construction and detection methods.
Background technique
There are a large amount of steel knots in the engineering structures such as all types of industries and civil building, structures, bridge, culvert and tunnel
Structure, these steel constructions occupy an important position in the Republic of China's economy, in these steel constructions, not due to their local environments
Together, because of the reasons such as external loads or human factor in the engineering that they are on active service, inevitably will appear various each
The damage and defect of sample, welding, traditional reinforcement process such as bolt link have the limitation of more defect.However carbon fibre material conduct
A kind of novel reinforced material, carbon fibre material elasticity modulus is close with steel but intensity is five times of reinforcing bar, while having light
The advantages that easy to form, corrosion resistance and durability are good, anti-fatigue performance is good, easy for construction, and carbon fibre material possess this
A little advantages can perfectly solve defect present in the above several method, therefore will also obtain in steel construction repairing and reinforcement
It is widely applied.
In recent engineer application, there are the methods of following detection carbon fiber reinforcement steel：
One, the principle of ray detection：X-ray penetrating component is issued using ray tube, when ray meets stomata, dregs, splits
When the positions such as seam, these defects have reduction effect to the absorption and scattering of ray, to penetrate the image on egative film or fluorescent screen
Compared with densifie state structure image can difference, form the different image of blackness, thus judge component inside defect.Mainly
It has the following disadvantages：It (1) is suitable for examining relatively thin workpiece and being not suitable for thicker workpiece；(2) testing cost is high；(3) detection speed
Degree is slow；(4) ray has injury to human body.
Two, ultrasound examination principle：It is interacted by ultrasonic wave and component, the wave of reflection, transmission and scattering is carried out
Research carries out gross imperfection detection, geometrical property detection, the detection of institutional framework and mechanical property variation to component, thus right
Its characteristic is evaluated.It has the following disadvantages：(1) it is suitable for examining the biggish structure of thickness, is not suitable for examining relatively thin knot
Structure；(2) the irregular shape of workpiece and some structures will affect detection；(3) uneven or coarse surface will affect coupling and sweep
It looks into, to influence detection accuracy and reliability.
Three, the principle of Magnetic testing：After ferrimagnet is magnetized, make the component surface magnetic line of force that local distortion occur and produce
Raw leakage field, the magnetic powder on adsorption element surface show the position, shape and size of discontinuity.It has the following disadvantages：
(1) surface and near surface flaw can be checked, cannot be used for checking internal flaw；(2) shape and size of workpiece are sometimes right
Detection has an impact, because it is difficult to not detect due to magnetization.
Four, the principle of Liquid penetrant testing：Component surface is coated with the bleeding agent containing fluorescent dye or illuminating colour, in capillary
Under pipe effect, after a period of time, penetrating fluid can penetrate into Surface-breaking defect, then imaging agent, defect are coated on surface
In infiltration night be absorbed back in imaging agent, under certain light source effect, penetrating fluid trace is real, to lean out defect
Shape and distribution.It has the following disadvantages：(1) defect of surface opening can be detected, but to inner defect or is closed
The surface defect of mould assembly can not detect；(2) detection process is more, and speed is slow；(3) material is more expensive, higher cost；(4) some materials
It is inflammable and toxic.
Summary of the invention
For overcome the deficiencies in the prior art, the purpose of the present invention is to provide a kind of carbon fiber reinforcement steel constructions, utilize
The conductive characteristic of conductive adhesive itself, by detecting resistance variations caused by the deformation of ruggedized construction ontology come to carbon fiber
The deformation damage reinforced in the life cycle management of the structure of steel carries out detection and safe early warning.Due to connection steel and carbon fiber
Binder originally be it is nonconducting, spy of the present invention uses electroconductive binder instead, so that entire ruggedized construction ontology be made to become to lead
Electric structure, and the deformation damage information of structure is obtained using the resistance variations of itself to achieve the purpose that self-test.
The present invention provides a kind of carbon fiber reinforcement steel construction, including ruggedized construction ontology, and ruggedized construction ontology includes steel plate
Layer, carbon fiber layer；The ruggedized construction ontology further includes conductive tie layers；The conductive tie layers are made of electroconductive binder；
The steel plate layer and the carbon fiber layer are connected as one by the conductive tie layers, the conductive tie layers electrically conduct
The steel plate layer and the carbon fiber layer.
Preferably, a kind of carbon fiber reinforcement steel construction further includes at least two electrodes；The electrode is fixedly installed in the steel
Plate layer surface or the carbon fiber layer surface.
Preferably, at least two electrodes are fixedly installed in the carbon fiber layer surface while at least two electrodes are fixed
It is installed on the steel plate layer surface.
Preferably, four electrodes are fixedly installed in the carbon fiber layer.
Preferably, the steel plate layer, the conductive tie layers, the carbon fiber layer stack gradually to form the ruggedized construction
Ontology；Ruggedized construction ontology two sides are symmetrical several to the electrode.
Preferably, the electroconductive binder is electroconductive resin.
A kind of carbon fiber reinforcement steel detection method, includes the following steps：
Power on, any two electrode on ruggedized construction ontology access constant-current source or constant pressure source and on conduct；
It measures, the two active electrodes access voltage detecting circuit on ruggedized construction ontology detects two inter-electrode voltages；
Monitoring, obtained according to Ohm's law the monitoring resistor value of the ruggedized construction ontology between two active electrodes and with standard threshold
Value is compared, if monitoring resistor value exceeds level threshold value, labeled as exception and does alarm.
Preferably, two electrodes for accessing constant-current source or constant pressure source are located on the carbon fiber layer of ruggedized construction ontology simultaneously, connect
Enter two electrodes of voltage detecting circuit also while being located on the carbon fiber layer of ruggedized construction ontology.
Preferably, two electrodes of access constant-current source or constant pressure source are located at the carbon fiber layer and steel plate of ruggedized construction ontology
On layer, the electrode for accessing voltage detecting circuit is also located on the carbon fiber layer and steel plate layer of ruggedized construction ontology.
Preferably, two electrodes for accessing constant-current source are symmetrically distributed in ruggedized construction ontology two sides, access the electrode of constant-current source
It is identical as the access electrode of voltage detecting circuit.
Compared with prior art, the beneficial effects of the present invention are：
The present invention provides a kind of carbon fiber reinforcement steel construction, including ruggedized construction ontology, and ruggedized construction ontology includes steel plate
Layer, carbon fiber layer；Ruggedized construction ontology further includes conductive tie layers；Conductive tie layers are made of electroconductive binder；Pass through conduction
Steel plate layer and carbon fiber layer are connected as one by articulamentum, and conductive tie layers electrically conduct steel plate layer and carbon fiber layer.The present invention
A kind of carbon fiber reinforcement steel detection method is further related to, is included the following steps：It powers on, any two electrode on ruggedized construction ontology connects
Enter constant-current source or constant pressure source and on conduct；It measures, the two active electrodes access voltage detecting circuit inspection on ruggedized construction ontology
Survey two inter-electrode voltages；Monitoring, the monitoring resistor value of the ruggedized construction ontology between two active electrodes is obtained according to Ohm's law simultaneously
It is compared with level threshold value, if monitoring resistor value exceeds level threshold value, labeled as exception and does alarm.The present invention is utilized and is led
The conductive characteristic of electric binder itself adds carbon fiber by detecting resistance variations caused by the deformation of ruggedized construction ontology
Gu the deformation damage in the life cycle management of the structure of steel carries out detection and safe early warning.It is viscous due to connection steel and carbon fiber
Knot agent originally be it is nonconducting, spy of the present invention uses electroconductive binder instead, so that entire ruggedized construction ontology be made to become electrically conductive
Structure, and the deformation damage information of structure is obtained using the resistance variations of itself to achieve the purpose that self-test.The present invention mentions
The technology of confession can carry out the detection in long-term life cycle management, and low in cost, while without using additional detection
Technology, it is only necessary to arrange that detection can be completed in electrode, measurement resistance on carbon fiber and steel, versatility is good, and has technique letter
Single and harmless advantage.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
A specific embodiment of the invention is shown in detail by following embodiment and its attached drawing.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is a kind of carbon fiber reinforcement steel construction structural schematic diagram one of the invention；
Fig. 2 is a kind of carbon fiber reinforcement steel construction structural schematic diagram two of the invention；
Fig. 3 is a kind of carbon fiber reinforcement steel construction structural schematic diagram three of the invention；
Fig. 4 is a kind of carbon fiber reinforcement steel construction structural schematic diagram four of the invention.
In figure：Steel plate layer 1, carbon fiber layer 2, conductive tie layers 3, electrode 4.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
A kind of carbon fiber reinforcement steel construction, including ruggedized construction ontology, as shown in Figure 1, ruggedized construction ontology includes steel plate
Layer 1, carbon fiber layer 2；The ruggedized construction ontology further includes conductive tie layers 3；The conductive tie layers 3 are by electroconductive binder system
At；The steel plate layer 1 and the carbon fiber layer 2 are connected as one by the conductive tie layers 3, the conductive tie layers 3
Electrically conduct the steel plate layer 1 and the carbon fiber layer 2.In one embodiment, a kind of carbon fiber reinforcement steel construction further include to
Few two electrodes 4；As shown in Figure 1, two electrodes 4 are fixedly installed in 2 surface of 1 surface of steel plate layer or the carbon fiber layer；It is corresponding
, a kind of carbon fiber reinforcement steel detection method includes the following steps：
Power on, any two electrode on ruggedized construction ontology access constant-current source or constant pressure source and on conduct；
It measures, the two active electrodes access voltage detecting circuit on ruggedized construction ontology detects two inter-electrode voltages；
Monitoring, obtained according to Ohm's law the monitoring resistor value of the ruggedized construction ontology between two active electrodes and with standard threshold
Value is compared, if monitoring resistor value exceeds level threshold value, labeled as exception and does alarm.Wherein, level threshold value is carbon fiber
Resistance value range when dimension reinforcing steel construction is effective；In power up, it is permanent that pulse constant current, pulse constant pressure or continuous safety can be used
Stream, continuously the mode of safe constant pressure powers on, it is ensured that safety.
Two electrodes that two electrodes powered on can be for measurement, in one embodiment, as shown in Figure 2 and Figure 3, to avoid electricity
4 lead self-resistance of pole influences, and two electrodes powered on are two non-measured electrodes, wherein two electrodes in the outer part are to power on
Electrode, two electrodes of inner survey are two electrodes of access voltage detecting circuit detection in measuring process, in practical applications, such as
Shown in Fig. 2, at least two electrodes 4 are fixedly installed in 2 surface of carbon fiber layer while at least two electrodes 4 are fixedly mounted
In 1 surface of steel plate layer, two electrodes for accessing constant-current source are located at the carbon fiber layer 2 and steel plate layer 1 of ruggedized construction ontology
On, the electrode for accessing voltage detecting circuit is also located in carbon fiber layer 2 and the steel plate layer 1 of ruggedized construction ontology；At this time
Carbon fiber reinforcement steel detection method uses heteropleural four electrode method, and two electrodes in the outer part are passed through constant-current supply or constant voltage source, lean on
The two electrodes access voltage detecting circuit of interior survey detects voltage, is tied by the two interelectrode reinforcings that Ohm's law obtains inner survey
Structure bulk resistance, and be compared with level threshold value, judge whether alarm；As shown in figure 3, four electrodes 4 are fixedly installed in
The carbon fiber layer 2 accesses two electrodes of constant-current source while being located on the carbon fiber layer 2 of ruggedized construction ontology, access voltage inspection
Two electrodes of slowdown monitoring circuit are also located at simultaneously on the carbon fiber layer 2 of ruggedized construction ontology；Carbon fiber reinforcement steel detection method at this time
Using ipsilateral four electrode method, two electrodes in the outer part are passed through constant-current supply or constant voltage source, and two electrodes of inner survey access voltage
Detection circuit detects voltage, obtains two interelectrode ruggedized construction bulk resistances of inner survey, and and standard by Ohm's law
Threshold value is compared, and judges whether alarm；As shown in Figure 1, Figure 3, it is suitable for being not easy at steel construction with lateral electrode laying electrode
The case where, particular for bridge reinforced by carbon-fibre.
The steel plate layer 1, the conductive tie layers 3, the carbon fiber layer 2 stack gradually to form the ruggedized construction sheet
Body；As shown in figure 4, ruggedized construction ontology two sides are symmetrical several to the electrode 4, two electrodes pair of constant-current source are accessed
Title is distributed in ruggedized construction ontology two sides, and the electrode for accessing constant-current source is identical as the access electrode of voltage detecting circuit, in Fig. 4
5 pairs of electrodes 4 are symmetrically distributed in fixing structure ontology two sides, and each pair of electrode 4 accesses constant-current source and access voltage detecting circuit simultaneously, adopts
With segmented electrode method, measurement obtains each pair of interelectrode ruggedized construction ontology resistance value, realizes ruggedized construction ontology sectional monitoring, special
Safety pin needs more accurate strict measurement to most fragile dangerous point in bridge span, using segmentation multi-electrode method, multi-group data,
It analyzes jointly more accurate.
Preferably, the electroconductive binder is electroconductive resin.For example, conductive epoxy resin, using epoxy resin as matrix material
Material, while the conductive polymer material that conductive filler materials are combined；Wherein, epoxy resin itself is a kind of linear polymerization
Object, according to structure and molecular weight difference.It is in a liquid state at normal temperature or solid-state, dissolves in a variety of organic solvents.When use and solidify
Agent effect crosslinks reaction, constitutes cross-linking type thermosetting plastics, and generating and jumping resin is that mechanical performance and electric property are good
Polymeric material.The open-minded knot power of epoxy resin is strong, and conductive material (carbon black or silver powder) is compound may be constructed electric conductivity cementing agent
And conductive coating.
Using the conductive characteristic of conductive adhesive itself, become by detecting resistance caused by the deformation of ruggedized construction ontology
Change and carries out detection and safe early warning come the deformation damage in the life cycle management of the structure to carbon fiber reinforcement steel.Due to connecting steel
The binder of material and carbon fiber originally be it is nonconducting, spy of the present invention uses electroconductive binder instead, to make entire ruggedized construction sheet
Body becomes electrically conductive structure, and obtains the deformation damage information of structure using the resistance variations of itself to reach self-test
Purpose.Technology provided by the invention can carry out the detection in long-term life cycle management, and low in cost, while without making
With additional detection technique, it is only necessary to arrange that detection can be completed in electrode, measurement resistance on carbon fiber and steel, versatility is good,
And has the advantages that simple process and harmless.
More than, only presently preferred embodiments of the present invention is not intended to limit the present invention in any form；All current rows
The those of ordinary skill of industry can be shown in by specification attached drawing and above and swimmingly implement the present invention；But all to be familiar with sheet special
The technical staff of industry without departing from the scope of the present invention, is made a little using disclosed above technology contents
The equivalent variations of variation, modification and evolution is equivalent embodiment of the invention；Meanwhile all substantial technologicals according to the present invention
The variation, modification and evolution etc. of any equivalent variations to the above embodiments, still fall within technical solution of the present invention
Within protection scope.
Claims (10)
1. a kind of carbon fiber reinforcement steel construction, including ruggedized construction ontology, ruggedized construction ontology includes steel plate layer (1), carbon fiber
Layer (2)；It is characterized in that：The ruggedized construction ontology further includes conductive tie layers (3)；The conductive tie layers (3) are by conduction
Adhesive is made；The steel plate layer (1) and the carbon fiber layer (2) are connected as one by the conductive tie layers (3), institute
It states conductive tie layers (3) and electrically conducts the steel plate layer (1) and the carbon fiber layer (2).
2. a kind of carbon fiber reinforcement steel construction as described in claim 1, it is characterised in that：It further include at least two electrodes (4)；Institute
It states electrode (4) and is fixedly installed in the steel plate layer (1) surface or the carbon fiber layer (2) surface.
3. a kind of carbon fiber reinforcement steel construction as claimed in claim 2, it is characterised in that：At least two electrodes (4) are fixed
It is installed on the carbon fiber layer (2) surface while at least two electrodes (4) is fixedly installed in the steel plate layer (1) surface.
4. a kind of carbon fiber reinforcement steel construction as claimed in claim 2, it is characterised in that：Four electrodes (4) are fixedly mounted
In the carbon fiber layer (2).
5. a kind of carbon fiber reinforcement steel construction as claimed in claim 2, it is characterised in that：The steel plate layer (1), the conduction
Articulamentum (3), the carbon fiber layer (2) stack gradually to form the ruggedized construction ontology；Ruggedized construction ontology two sides pair
Claim distribution several to the electrode (4).
6. a kind of carbon fiber reinforcement steel construction as claimed in claim 1 to 5, it is characterised in that：The electroconductive binder
For electroconductive resin.
7. a kind of carbon fiber reinforcement steel detection method, which is characterized in that include the following steps：
Power on, any two electrode on ruggedized construction ontology access constant-current source or constant pressure source and on conduct；
It measures, the two active electrodes access voltage detecting circuit on ruggedized construction ontology detects two inter-electrode voltages；
Monitoring, obtained according to Ohm's law the ruggedized construction ontology between two active electrodes monitoring resistor value and and level threshold value into
Row compares, if monitoring resistor value exceeds level threshold value, labeled as exception and does alarm.
8. a kind of carbon fiber reinforcement steel detection method as claimed in claim 7, it is characterised in that：Access constant-current source or constant pressure source
Two electrodes be located on the carbon fiber layer (2) of ruggedized construction ontology simultaneously, access two electrodes of voltage detecting circuit also position simultaneously
In on the carbon fiber layer (2) of ruggedized construction ontology.
9. a kind of carbon fiber reinforcement steel detection method as claimed in claim 7, it is characterised in that：Access constant-current source or constant pressure source
Two electrodes be located at ruggedized construction ontology carbon fiber layer (2) and steel plate layer (1) on, access the electrode of voltage detecting circuit
Also it is located on carbon fiber layer (2) and steel plate layer (1) of ruggedized construction ontology.
10. a kind of carbon fiber reinforcement steel detection method as claimed in claim 9, it is characterised in that：Access two electricity of constant-current source
Pole is symmetrically distributed in ruggedized construction ontology two sides, and the electrode for accessing constant-current source is identical as the access electrode of voltage detecting circuit.
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| CN201810622060.5A CN108868184B (en) | 2018-06-15 | 2018-06-15 | Carbon fiber reinforced steel structure and detection method |
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| CN201810622060.5A CN108868184B (en) | 2018-06-15 | 2018-06-15 | Carbon fiber reinforced steel structure and detection method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109406582A (en) * | 2018-12-28 | 2019-03-01 | 南水北调东线总公司 | A kind of Structure Damage Identification using carbon fiber change in resistance |
| CN109632897A (en) * | 2019-01-07 | 2019-04-16 | 中材科技股份有限公司 | A kind of damage detecting method of conductive fiber tow |
| CN113250482A (en) * | 2021-05-12 | 2021-08-13 | 三峡大学 | Device and method for sealing floor slab cracks through magnetic slurry |
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