CN203053966U - Device for monitoring steel bar corrosion in concrete structure - Google Patents
Device for monitoring steel bar corrosion in concrete structure Download PDFInfo
- Publication number
- CN203053966U CN203053966U CN 201220615624 CN201220615624U CN203053966U CN 203053966 U CN203053966 U CN 203053966U CN 201220615624 CN201220615624 CN 201220615624 CN 201220615624 U CN201220615624 U CN 201220615624U CN 203053966 U CN203053966 U CN 203053966U
- Authority
- CN
- China
- Prior art keywords
- fiber bragg
- bragg grating
- corrosion
- steel bar
- grating strain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model relates to a device for monitoring steel bar corrosion in a concrete structure. The device comprises a fiber bragg grating strain sensor, a signal processing unit, a stainless steel slope support, at least three fiber bragg grating strain sensors and wires, wherein the fiber bragg grating strain sensors are sequentially arranged on the slope of the stainless steel slope support, and a signal acquired by each fiber bragg grating strain sensor is sent to the signal processing unit by virtue of a wire. According to the device, the fiber bragg grating strain sensors arranged by adopting a specific method are adopted for determining tension strain caused by a corrosion expansive force produced by a steel bar corrosion product, and steel bar corrosion rate and steel bar corrosion initial corrosion time t0 are deduced, so as to indirectly monitor steel bar corrosion condition. The device for monitoring steel bar corrosion is convenient to arrange, accuracy of a test result is high, reliability is good, and the device for monitoring steel bar corrosion can realize long-term real-time online non-destructive monitoring on a common concrete structure.
Description
Technical field
The utility model relates to be analyzed and the survey control technology field, is specifically related to monitoring steel bar corrosion device in a kind of xoncrete structure.
Background technology
Reinforced concrete structure is one of structure type that is most widely used in the civil engineering work.The factor that influences concrete structure durability is comparatively complicated, and effect intercouples again between them.A large amount of engineering structure diseases studies show that steel bar corrosion is the main factor that influences concrete structure durability.Professor Mehta points out: " order of successively decreasing by importance is for the world today, the reason of destroying concrete structure: the freeze injury under the steel bar corrosion, cold climate, the physics of erosion environment, chemical action ".The xoncrete structure that is caused by steel bar corrosion destroys too early, a big disaster that has become whole world common concern and become increasingly conspicuous.Particularly in environments for use such as coastal, coastal waters and extraordinary bridge, reinforced concrete structure may be lost its permanance because of steel bar corrosion, and cause the decline of reinforced concrete member load-bearing capacity and the reduction of ductility, finally cause structure can not reach predetermined Years Of Service and inefficacy in advance.Therefore grasp the corrosion situation of reinforcing bar in the xoncrete structure early, taking preventive measures prevents the further aggravation of corrosion, significant to the serviceable life that prolongs xoncrete structure.
The on-the-spot detection technique of traditional steel bar corrosion generally is divided into damaged detection and non-breakage detects two kinds.The damaged detection, method are relatively more directly perceived and accurately, can judge regional area place's reinforcement corrosion degree by qualitative, quantitative, reinforcing bar but more time-consuming, and effort can cause to a certain degree destruction to buildings or member.Non-damaged the detection can be divided into physics method and electrochemical process two big classes again.The physics method causes by the mensuration steel bar corrosion that mainly the variation of physical characteristicss such as resistance, electromagnetism, heat conduction, sound wave propagation reflects that the steel bar corrosion situation has resistor rod method, eddy current probe method, rays method, acoustic emission detection method and infrared thermal imagery method etc. for the physical method that Rust of Rebar in Concrete detects, physical method mainly rests on laboratory stage at present, and it is less relatively to be used for on-the-spot actual engineering.Electrochemical method is determined Rust of Rebar in Concrete degree or speed by the electrochemical properties of measuring the steel reinforced concrete erosion system.Electrochemical method commonly used has three kinds: self-potential method, the anti-spectrometry of interchange and polarization measurement technology.
With respect to traditional detection method, adopt not only precision height of fiber-optic grating sensor, output area is wide, and volume is little, good endurance, prior its can be realized long-term real time and on line monitoring to the normal concrete structure.Following correspondence is carried out brief introduction with the present Research of Fiber Bragg Grating technology monitoring steel bar corrosion:
2006, Yan Yun etc. based on reinforcement corrosion in the concrete after the fact of volume change, propose a kind ofly for the novel sensor of measuring the concrete reinforcement corrosion, and be fixed on the surface of circular reinforcing bar after having carried out will fiber grating stretching, put into the test that etchant solution accelerates reinforcement corrosion.2008, the principle that Li Jun etc. can drift about based on fiber grating strain centre wavelength designed the optical fiber Bragg raster corrosion sensor.By reinforcing bar being placed in the two stainless steel grooves, adopt the energising of constant current instrument to accelerate corrosion to it, and laying a grating uses the AB glue on two stainless bridle iron surfaces, place the grating of a free state in addition separately, measure the strain that causes owing to temperature, thereby isolate the caused grating strain of steel bar corrosion volumetric expansion.2009, Li Jun etc. proposed a kind of two muscle corrosion grating sensors of novel measurement steel bar corrosion again.This sensor is pasted Fiber Bragg Grating FBG and is fixed in two compact arranged reinforcing bar upper surfaces.Behind steel bar corrosion, volumetric expansion and make fiber grating produce tensile strain, the reflected light wavelength of fiber grating will change, so can reflect extent of steel corrosion indirectly by the wavelength of measuring optical fiber grating.2010, Li Jun etc. proposed a kind of new reinforcement corrosion fiber-optic grating sensor and temperature compensation again.Two near the reinforcing bar center near paste fiber grating, the reinforcement corrosion volumetric expansion, cause fiber grating to produce strain, a reinforcement corrosion fiber-optic grating sensor is monitored because the grating strain that reinforcement corrosion and temperature variation cause by laying, lay a stainless steel fiber-optic grating sensor simultaneously separately and measure the grating strain that temperature causes, separablely go out reinforcing bar because the caused volume change of corrosion, thereby realize the monitoring to reinforcement corrosion degree and speed.2011, Liu Hongyue etc. designed a kind of long period fiber grating reinforcing steel corrosion monitoring sensor based on refractometry.Reinforcing bar is fixed on the stainless steel pedestal that has hole, filled phenolic resin in the pedestal, the distance that long-period fiber grating sensor probe and reinforcing bar to be measured separate 4～6mm, avoid because the reinforcing bar volumetric expansion that brings of corrosion to the influence of long-period fiber grating sensor probe, can obtain corresponding relation between long period fiber grating harmonic peak wavelength and the inside concrete extent of steel corrosion by test.
Pertinent literature has proposed different technical methods steel bar corrosion has been monitored, and has proved its feasibility.But; two muscle corrosion grating sensors that the sensor that Yan Yun proposes and Li Jun propose are fiber grating to be fixed on directly carry out monitoring steel bar corrosion on the reinforcing bar; this just has higher requirement to pre-service and the protection of the reinforcing bar in the work progress of reinforcing bar; and be not easy to lay sensor, increased the difficulty of monitoring simultaneously.In addition, the residing environment of monitoring steel bar corrosion is not to be in the concrete in the test that Yan Yun and Liu Hongyue do, because the difference of environment of living in may cause the monitoring steel bar corrosion result to have certain difference.Therefore remain further to be studied theoretically with the feasibility of fiber grating monitoring steel bar corrosion and the technology of the more convenient laying of proposition and monitoring steel bar corrosion, and develop the real-time automatic monitoring technology for newly-built xoncrete structure, particularly the Important Project structure is very necessary.
Summary of the invention
The technical problems to be solved in the utility model provide a kind of test result precision height, good reliability, long-term real time and on line monitoring and the xoncrete structure being convenient to lay in the monitoring steel bar corrosion device; And according to the mechanism of steel bar corrosion and to the influence of concrete structure member, set up effective steel bar corrosion recognition methods, and determine corrosion damage identification sensitive parameter, finally form monitoring steel bar corrosion method in a kind of xoncrete structure.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
The using optical fibre grating strain transducer can be derived steel bar corrosion speed and steel bar corrosion initial corrosion time t by concrete cover being measured the stretching strain that its rust expansive force that produces owing to the steel bar corrosion product causes
0, to realize indirect monitoring steel bar corrosion situation: the one, according to the mechanism of steel bar corrosion and to the influence of concrete structure member, set up effective steel bar corrosion recognition methods, determine corrosion damage identification sensitive parameter; The 2nd, select suitable fiber-optic grating sensor for use, guarantee to obtain accurately and reliably identification parameter.Concrete technical scheme is as follows:
Design monitoring steel bar corrosion device in a kind of xoncrete structure; comprise fiber Bragg grating strain sensor; signal processing unit; stainless steel inclined-plane support; at least three fiber Bragg grating strain sensors and lead; described fiber Bragg grating strain sensor is laid on the inclined-plane of described inclined-plane support successively; wherein; distance from the bottom surface of the nearest fiber Bragg grating strain sensor of reinforcing bar to be measured and this reinforcing bar to be measured is 5～10mm; distance from the end face of the nearest fiber Bragg grating strain sensor of concrete protective laminar surface from this concrete protective laminar surface is 5～10mm; all the other fiber Bragg grating strain sensors are laid between above-mentioned two fiber Bragg grating strain sensors along the bevel direction of described inclined-plane support, and each fiber Bragg grating strain sensor is gathered the gained signal and delivered to signal processing unit via lead.
The standard range of described fiber-optic grating sensor: ± 1500
μ ε;Nonlinearity: straight line :≤0.5%FS; Polynomial expression :≤0.1% F.S.; Sensitivity: 0.025% F.S.; Temperature range: – 20～+ 80 ℃; Physical dimension: Ф 10mm * L (tool length is different different because of range); Transmitting bar is the stainless steel measuring staff.
The inclination angle of inclined plane of described inclined-plane support is 10 °～15 °, and it is made by stainless steel.
Utilize above-mentioned monitoring device to carry out the method for monitoring steel bar corrosion in the xoncrete structure, comprise the steps:
(1) be embedded in the fiber Bragg grating strain sensor in the monitoring steel bar corrosion device in the above-mentioned xoncrete structure and inclined-plane support in the xoncrete structure in advance, the inclined-plane support is laid along main muscle direction, and support base, inclined-plane and reinforcing bar are fitted, being arranged on from the bottom surface of the nearest fiber Bragg grating strain sensor of reinforcing bar to be measured and the distance of this reinforcing bar to be measured is 5～10mm, distance from the end face of the nearest fiber Bragg grating strain sensor of concrete protective laminar surface from this concrete protective laminar surface is 5～10mm, all the other fiber Bragg grating strain sensors are laid between above-mentioned two fiber Bragg grating strain sensors along the bevel direction of described inclined-plane support, and the spacing of adjacent each fiber Bragg grating strain sensor is 50～100mm;
(2) to begin the moment of corrosion be the initial corrosion time to reinforcing bar, is designated as
t 0 Be designated as in the moment that begins to produce strain from the nearest fiber Bragg grating strain sensor of reinforcing bar to be measured
t 1 An optional fiber Bragg grating strain sensor in the middle part records the moment that it begins to produce strain
t 2 To be designated as from the moment that the nearest fiber Bragg grating strain sensor of concrete protective laminar surface begins to produce strain
t 3 t 1 Constantly, locate concrete stretching strain via determining its position from the nearest fiber Bragg grating strain sensor of reinforcing bar to be measured
ε 1 , obtain this according to following Hooke's law formula and locate concrete stress
σ 1 :
Same, exist respectively
t 2 , t 3 Constantly, the fiber Bragg grating strain sensor by correspondence obtains corresponding stretching strain everywhere
ε 2 , ε 3 , obtain corresponding stress according to above-mentioned Hooke's law formula
2,
3
(3) according to gained stress everywhere
, obtain corresponding rust expansive force
P, for each point in the concrete,
=P, try to achieve the corrosion rate according to following formula
ρ, i.e. the corrosion degree of reinforcing bar:
In the formula:
---reinforcing bar rust expansive force (
);
k 1 , k 2 , k 3 , k 4 ---reinforcing bar rust expansive force correlation parameter is general
k 1 Get 9043.2;
k 2 Get 2636.4;
k 3 Get 55.62;
k 4 Get 103.
(4) from
t 1 Arrive
t 2 The extent of steel corrosion changing value is in time period
ρ 2 -ρ 1, and then according to
Obtain the rusting rate of reinforcing bar;
(5) release the initial corrosion time that reinforcing bar begins corrosion according to following formula is counter
t 0 ,
In described step (4), try to achieve after the same method from
t 1 Arrive
t 3 Steel bar corrosion speed in time period
With from
t 2 Arrive
t 3 Steel bar corrosion speed in time period
, get v
1,
,
Mean value as the steel bar corrosion speed of revising
Utilize the sensor and method can also predict the development condition of rust spalling seam in the concrete cover.
The utlity model has actively useful effect:
1. this device main characteristics is convenient to lay exactly, and the test result precision is higher, and better reliability be the more important thing is that it can realize the long-term real time and on line monitoring to the normal concrete structure, and is a kind of non-breakage monitoring.
2. this device can detect concrete stretching strain accurately, and then obtain the stress at this place, further extrapolating reinforcing steel corrosion rate is extent of steel corrosion, can obtain rusting rate at last and also can revise it, and then can derive the initial corrosion time t of steel bar corrosion
0
3. this device volume is little, and is in light weight, simple in structure; High sensitivity and wide linear output area; Anti-electromagnetic interference (EMI), electrical isolation; Version is flexible; Fiber grating bends when being subjected to external force in elastic range, because elastic reaction, external force can restore to the original state after disappearing automatically, therefore can make the various fiber-optic grating sensors that profile is different, size is different according to the practical structures needs.
4. used Fibre Optical Sensor good corrosion resistance, good endurance, the reliability and stability height, maintenance cost is low.Foreign study shows that fiber Bragg grating sensor is imbedded carbon fibre composite, 0～2000pc circulation 320000 times, degradation phenomena still do not occur; Think that by accelerated aging test the Fiber Bragg Grating FBG survival life-span was greater than 25 years.
5. the utility model method gained measurement result has good repeatability, therefore can be applied to the structure that long term monitoring is born course under cyclic loading.
Description of drawings
Fig. 1 is that the monitoring steel bar corrosion device is laid synoptic diagram (facade) in a kind of xoncrete structure;
Fig. 2 is that the monitoring steel bar corrosion device is laid synoptic diagram (side) in a kind of xoncrete structure;
Fig. 3 is the structural representation of monitoring steel bar corrosion device in a kind of xoncrete structure;
Fig. 4 is the plan structure synoptic diagram of monitoring steel bar corrosion device in a kind of xoncrete structure.
Among the figure, 1,2,3 is fiber-optic grating sensor, and 4 is reinforcing bar, and 5 is support, and 6 is reinforcing bar, and 7,8 is lead.
Embodiment
Further set forth the utility model below in conjunction with specific embodiment.Related method among the following embodiment if no special instructions, is conventional method.
Monitoring steel bar corrosion method in 1 one kinds of xoncrete structures of embodiment:
(1) design and fabrication of test specimen
Made a RC Beam with Rectangular Section that strength grade is C30, long 3000mm * wide 250mm * high 500mm, protective layer thickness are 30mm.42.5 grades of Portland cements that cement adopts certain company to produce; Sand adopts certain real estate medium sand, and modulus of fineness is 2.8, and silt content is 1.7%; It is the rubble of 5～20mm that rubble adopts certain real estate continuous grading, and silt content is 0.1%, and bulk density is 1540kg/m
3Concrete mix is as shown in table 1.The longitudinal tensile reinforcing bar is II level hot rolling deformation reinforcing bar, and stirrup is I level plain bar.
Table 1 C30 match ratio
(2) laying of monitoring steel bar corrosion device and fiber grating thereof in the xoncrete structure, referring to Fig. 1 to Fig. 4:
In order accurately to measure the stretching strain of reinforced concrete protective layer; this test is being placed a tilted supporter along the reinforcing bar direction; three fiber-optic grating sensors 1 on tilted supporter, have been laid altogether; 2; 3; wherein; distance from the bottom surface of the nearest fiber-optic grating sensor 1 of reinforcing bar to be measured and this reinforcing bar to be measured is 8mm; distance from the end face of the nearest fiber-optic grating sensor 3 of concrete protective laminar surface from this concrete protective laminar surface is 10mm; all the other fiber grating 2 strain transducers are laid between above-mentioned two fiber Bragg grating strain sensors along the bevel direction of described inclined-plane support; each fiber Bragg grating strain sensor is gathered the gained signal via lead 7; 8 deliver to signal processing unit; installation position figure and the structural representation of fiber grating in the xoncrete structure in the monitoring steel bar corrosion device in concrete is shown in Fig. 1～4.
(3) technical parameter of fiber grating is as shown in table 2:
The technical parameter of table 2 fiber grating
| The standard range | ±1500 με |
| Nonlinearity | Straight line :≤0.5%FS; Polynomial expression :≤0.1%FS |
| Sensitivity | 0.025% F.S. |
| Temperature range | –20～+80℃ |
| Physical dimension | Ф 10mm * L (tool length is different different because of range) |
| Transmit bar | The stainless steel measuring staff |
Annotate: F.S. represents full scale
(4) test principle and result:
When 1. the Korrosionsmedium concentration of rebar surface did not reach the critical concentration of steel bar corrosion as yet, reinforcing bar was still unattacked.
When 2. in a single day surpassing this critical concentration value, reinforcing bar begins to take place corrosion.Because the inherent characteristic of Reinforced Concrete Materials, there are some micro-pores in reinforcing bar and concrete, and the initial iron rust that generates constantly infiltrates in the reinforcing bar hole on every side, before these micro-pores are filled, can not produce any stress in the protective seam concrete.
3. along with after corrosion product fills up hole around the reinforcing bar gradually, the iron rust of follow-up generation can only be piled up in rebar surface, and since its volume increase and the concrete around the reinforcing bar produced pressure.Obviously, along with the increase of corrosion product, this rust swelling pressure power is also more big.When the steel bar corrosion product surpassed a critical value, the concrete pulling stress that the iron rust volumetric expansion causes was greater than concrete tensile strength, so the concrete of reinforcing bar (comprising rusty scale) therefore ftractures.In this stage, owing to do not reach the limit capacity of protective seam opposing splitting as yet, the radially rust spalling of inside concrete seam does not run through the whole protecting layer thickness.
4. along with the aggravation of corrosion, the constantly expansion of the rust spalling of inside concrete seam, extend, until running through the whole protecting layer, and form visible crack on its surface.
This is the initial corrosion time constantly when reinforcing bar begins corrosion, is designated as
t 0 When fiber Bragg grating strain sensor 1 begins to produce strain, this moment engrave into
t 1 When fiber Bragg grating strain sensor 2 began to produce strain, this was designated as constantly
t 2 When fiber Bragg grating strain sensor 3 began to produce strain, this was designated as constantly
t 3 When
t 1 Constantly, can determine this by fiber Bragg grating strain sensor 1 and locate concrete stretching strain
ε 1 , the utilization Hooke's law (
) can obtain this and locate concrete stress
1Work as equally
t 2 ,
t 3 In the time of constantly, fiber Bragg grating strain sensor 2,3 also can obtain corresponding stretching strain everywhere, and then obtains stress.Stress
After obtaining, just can obtain corresponding rust expansive force
P, can go out the corrosion rate by inverse by the relation of rust expansive force and reinforcing steel corrosion rate
ρ, i.e. the corrosion degree of reinforcing bar.From
t 1 Arrive
t 2 During this period of time, the corrosion degree changing value also can be obtained, and is
ρ 2 -ρ 1, and then can obtain the rusting rate of reinforcing bar, be
,
t 3 The reinforcing steel corrosion rate of constantly trying to achieve can be revised steel bar corrosion speed with work.After the rusting rate correction, and then instead release the initial corrosion time that reinforcing bar begins corrosion
t 0 In addition, this sensor can also be predicted the development condition of rust spalling seam in the concrete cover.
When fiber Bragg grating strain sensor 1 produces strain, show reinforcing bar corrosion, the rust expansive force that the steel bar corrosion product produces has arrived fiber Bragg grating strain sensor 1.When the power of bearing when 1 place surpasses concrete tensile strength, illustrate that concrete herein begins to occur the crack, be in the reinforced concrete soil stress this moment and produce the stage; When fiber Bragg grating strain sensor 3 produces strain, illustrate that the crack is about to reach concrete structural surface, be in the reinforced concrete cracking stage this moment, when 3 power of bearing surpassed concrete tensile strength, concrete surface was with very fast generation crack.
Above-mentioned testing process also is specifically related to following each computing formula:
Parameter in the following formula
Above-mentioned various in:
---reinforcing bar rust expansive force (
);
k 1 , k 2 , k 3 , k 4 ---reinforcing bar rust expansive force correlation parameter,
k 1 Get 9043.2
, k 2 Get 2636.4
, k 3 Get 55.62
, k 4 Get 103;
---reinforcing steel corrosion rate (%);
From
t 1 Arrive
t 2 The extent of steel corrosion changing value is in time period
ρ 2 -ρ 1, and then according to
Obtain the rusting rate of reinforcing bar;
Release the initial corrosion time that reinforcing bar begins corrosion according to following formula is counter
t 0 ,
Concrete detection and result of calculation are shown in following each table.
Work as n=2.0, during R=8mm, the result is as shown in table 3:
Each calculation of parameter result of table 3
| t（a） | ε | σ | P | ρ | υ |
| 10 | 0 | 0 | 0 | 0 | 0 |
| 30 | 0.000013845 | 0.2769 | 0.2769 | 1% | 0.05%/a |
| 50 | 0.000031425 | 0.6285 | 0.6285 | 2% | 0.05%/a |
| 70 | 0.00005372 | 1.0744 | 1.0744 | 3% | 0.05%/a |
Work as n=2.5, during R=8mm, the result is as shown in table 4:
Each calculation of parameter result of table 4
| t（a） | ε | σ | P | ρ | υ |
| 10 | 0 | 0 | 0 | 0 | 0 |
| 23.3 | 0.000014345 | 0.2869 | 0.2869 | 1% | 0.075%/a |
| 36.6 | 0.000032655 | 0.6531 | 0.6531 | 2% | 0.075%/a |
| 49.9 | 0.00005598 | 1.1196 | 1.1196 | 3% | 0.075%/a |
Work as n=3.0, during R=8mm, the result is as shown in table 5:
Each calculation of parameter result of table 5
| t（a） | ε | σ | P | ρ | υ |
| 10 | 0 | 0 | 0 | 0 | 0 |
| 20 | 0.000012865 | 0.2573 | 0.2573 | 1% | 0.1%/a |
| 30 | 0.00002887 | 0.5774 | 0.5774 | 2% | 0.1%/a |
| 40 | 0.00004873 | 0.9746 | 0.9746 | 3% | 0.1%/a |
Though, above with a general description of the specific embodiments the utility model having been done detailed description, on the utility model basis, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements on the basis of not departing from the utility model spirit all belong to the claimed scope of the utility model.
Claims (3)
1. monitoring steel bar corrosion device in the xoncrete structure; comprise fiber Bragg grating strain sensor; signal processing unit and lead; it is characterized in that; also comprise stainless steel inclined-plane support; at least three fiber Bragg grating strain sensors; described fiber Bragg grating strain sensor is laid on the inclined-plane of described inclined-plane support successively; wherein; distance from the bottom surface of the nearest fiber Bragg grating strain sensor of reinforcing bar to be measured and this reinforcing bar to be measured is 5～10mm; distance from the end face of the nearest fiber Bragg grating strain sensor of concrete protective laminar surface from this concrete protective laminar surface is 5～10mm; all the other fiber Bragg grating strain sensors are laid in from the nearest fiber Bragg grating strain sensor of reinforcing bar to be measured and between the nearest fiber Bragg grating strain sensor of concrete protective laminar surface, each fiber Bragg grating strain sensor is gathered gained signal and delivered to signal processing unit via lead along the bevel direction of described inclined-plane support.
2. monitoring steel bar corrosion device in the xoncrete structure according to claim 1 is characterized in that, the standard range of described fiber-optic grating sensor: ± 1500
μ ε;Nonlinearity: straight line :≤0.5% F.S.; Polynomial expression :≤0.1% F.S.; Sensitivity: 0.025% F.S.; Temperature range: – 20～+ 80 ℃; Physical dimension: Ф 10mm * L, tool length is different different because of range; Transmitting bar is the stainless steel measuring staff.
3. monitoring steel bar corrosion device in the xoncrete structure according to claim 1 is characterized in that, the inclination angle of inclined plane of described inclined-plane support is 10 °～15 °, and it is made by stainless steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220615624 CN203053966U (en) | 2012-11-20 | 2012-11-20 | Device for monitoring steel bar corrosion in concrete structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220615624 CN203053966U (en) | 2012-11-20 | 2012-11-20 | Device for monitoring steel bar corrosion in concrete structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203053966U true CN203053966U (en) | 2013-07-10 |
Family
ID=48736906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220615624 Expired - Lifetime CN203053966U (en) | 2012-11-20 | 2012-11-20 | Device for monitoring steel bar corrosion in concrete structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203053966U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928580A (en) * | 2012-11-20 | 2013-02-13 | 郑州大学 | Corrosion monitoring device and method for reinforcement bar in concrete structure |
| CN104820022A (en) * | 2015-04-03 | 2015-08-05 | 山东大学 | Steel pipe concrete arch frame coupling performance detection and evaluation method, and steel pipe concrete arch frame coupling performance detection structure |
| CN113376061A (en) * | 2021-05-21 | 2021-09-10 | 青岛理工大学 | Device and method for monitoring chloride ion permeation state in concrete |
-
2012
- 2012-11-20 CN CN 201220615624 patent/CN203053966U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928580A (en) * | 2012-11-20 | 2013-02-13 | 郑州大学 | Corrosion monitoring device and method for reinforcement bar in concrete structure |
| CN104820022A (en) * | 2015-04-03 | 2015-08-05 | 山东大学 | Steel pipe concrete arch frame coupling performance detection and evaluation method, and steel pipe concrete arch frame coupling performance detection structure |
| CN104820022B (en) * | 2015-04-03 | 2017-07-04 | 山东大学 | A kind of concrete filled steel tube bow member coupling performance detection and evaluation method and detection structure |
| CN113376061A (en) * | 2021-05-21 | 2021-09-10 | 青岛理工大学 | Device and method for monitoring chloride ion permeation state in concrete |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102928580B (en) | Corrosion monitoring device and method for reinforcement bar in concrete structure | |
| Sun et al. | Smart sensing technologies for structural health monitoring of civil engineering structures | |
| Yao et al. | Crack detection and characterization techniques—An overview | |
| Aggelis et al. | Assessment of construction joint effect in full-scale concrete beams by acoustic emission activity | |
| Du et al. | Fracture mechanism and damage evaluation of FRP/steel–concrete hybrid girder using acoustic emission technique | |
| Sun et al. | Feasibility study on corrosion monitoring of a concrete column with central rebar using BOTDR | |
| Biswal et al. | Measurement of existing prestressing force in concrete structures through an embedded vibrating beam strain gauge | |
| Davis et al. | Distributed strain sensing to assess corroded RC beams | |
| Ai et al. | Corrosion damage identification for reinforced concrete beam using embedded piezoelectric transducer: Numerical simulation | |
| Andisheh et al. | Modeling the influence of pitting corrosion on the mechanical properties of steel reinforcement | |
| Wan | Using fiber-reinforced polymer (FRP) composites in bridge construction and monitoring their performance: An overview | |
| Taghavipour et al. | Detection and monitoring of flexural cracks in reinforced concrete beams using mounted smart aggregate transducers | |
| Zhao et al. | Optical fiber sensing of small cracks in isotropic homogeneous materials | |
| CN203053966U (en) | Device for monitoring steel bar corrosion in concrete structure | |
| Garhwal et al. | Acoustic emission monitoring of RC beams corroded to different levels under flexural loading | |
| Zhao et al. | Experimental and numerical investigation into corrosion-induced mortar/concrete cracking with distributed optical fiber sensors | |
| Xuan et al. | In situ monitoring on prestress losses in the reinforced structure with fiber-optic sensors | |
| Gomasa et al. | A review on health monitoring of concrete structures using embedded piezoelectric sensor | |
| Zhang et al. | Calculation the opening of neighboring surface cracks in concrete structure based on OFDR technology | |
| Gunes | Failure modes in structural applications of fiber-reinforced polymer (FRP) composites and their prevention | |
| Zhang et al. | Numerical simulation for synergetic deformation of optical fiber sensor and asphalt mixture | |
| Zhu et al. | Electrochemical impedance based interfacial monitoring for concrete beams strengthened with CFRP subjected to wetting–drying cycling and sustained loading | |
| Fouad et al. | Early corrosion monitoring of reinforcing steel bars by using long-gauge carbon fiber sensors | |
| Zeng et al. | Monitoring of prestressing forces in cross-tensioned concrete pavements during construction and maintenance based on distributed optical fiber sensing | |
| Ma et al. | Distributed displacement estimation of pre-stressed concrete beams with random cracks using long-gauge strain sensing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |