CN109577477A - A kind of prestressed component monitored, loss of prestress monitoring method, manufacturing method - Google Patents
A kind of prestressed component monitored, loss of prestress monitoring method, manufacturing method Download PDFInfo
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- CN109577477A CN109577477A CN201811580407.0A CN201811580407A CN109577477A CN 109577477 A CN109577477 A CN 109577477A CN 201811580407 A CN201811580407 A CN 201811580407A CN 109577477 A CN109577477 A CN 109577477A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisions for transferring data to distant stations, e.g. from a sensing device
- G06K17/0029—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisions for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
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Abstract
The invention discloses prestressed component, loss of prestress monitoring method and manufacturing methods that one kind can monitor.The prestressed component that can be monitored includes prestressed component ontology, long gauge-length carbon fiber strain sensing unit, electronic tag unit, microcircuit card and prestressed component surface output port.The long gauge-length carbon fiber strain sensing unit of the presstressed reinforcing steel surface setting includes at least one long gauge-length carbon fiber strain sensor, and presstressed reinforcing steel surface is axially laid in along presstressed reinforcing steel；After microcircuit card is connected in parallel built in prestressed component, then obtain via prestressed component surface output port the signal of each long gauge-length carbon fiber strain sensing unit；And combine built-in electronic tag, convenient reading knows the information such as the production information, service condition, position of orientation of prestressed component, satisfaction is positioned in real time, tracks and is monitored to prestressed component, to realize the Intelligent fine management in the use process of prestressed component.
Description
Technical field
The present invention relates to the loss of prestress monitoring methods of prestressed component and the component that one kind can monitor, will be high resistance to
Long long gauge-length carbon fiber sensing technology and less radio-frequency (RFID) technological incorporation, realizes prestressed component in field of civil engineering
From link is manufactured to using Intelligent fine management in link.
Background technique
Since prestressing technique has many advantages, such as to reduce scantling, saving material, mitigation self weight, prestressed concrete structure
Part has been widely used for numerous civil engineerings such as large bridge, road and pre-cast building.The tensioning amount of prestressed component is to determine
Determine the major parameter of component anti-bending strength, bearing capacity, therefore the qualitative control in prestressed component manufacturing process seems especially
It is important.In addition, being damaged after prestressed component is used in structure along with deteriorations such as steel bar corrosion, creep, concrete crackings
Appearance, will lead to component stress distribution reduce, Stiffness the problems such as.Traditional loss of prestress detection means is to pass through
Pressure sensor is disposed on the anchorage of prestressed component end, the variation of Zhang Qianhou axle power is put according to prestressing force to control pre- answer
Power.However, cause anchorage to shift with structure end since component will appear bending deformation after being placed in prestressing force, thus shadow
Ring the measurement accuracy of pressure sensor.In addition, external pressure sensor is easy by extraneous as air humidity, temperature thermally expand
Deng influence, the problem of sensor failure occur or separate with structure, thus it is difficult to meet the requirement of long term monitoring project.For with
Upper problem needs a kind of accurate monitoring system in real time to track the real-time behaviour in service of component.
Carbon fiber strain sensing technology starts to have obtained in the structure detection and monitoring technology of civil engineering traffic engineering structure
Concern.Carbon fiber is a kind of corrosion-resistant construction material of high intensity, while also having mechanical resistance characteristic, can pass through common electric bridge electricity
Realize stress (strain) measurement in road.As a kind of novel sensing material, not only more than traditional metallic resistance strain gauge transducer
With long-term stability, and resistance variations caused by carbon fibre material stress mostly come from change in resistance rather than
The change in size of sensing element, thus compared with the metal sensor material of traditional resistor strain gauge transducer carbon fiber have it is sensitive
Degree height and the small feature of transversal effect.In the investigation of practical sensing capabilities, discovery passes through length using carbon fiber as substrate
Gauge length packaging method makes long gauge length strain sensor and meets stable strain measurement, it can be achieved that small rank strain variation
Measurement.[bibliography: a kind of distributed high-accuracy long-gauge-length carbon fiber strain detection testing device and test method,
CN102494603A].On this basis, it concentrates principle to implement prepared recess enhanced sensitivity to carbon fiber sensing material using stress to arrange
It applies, to meet requirement of the carbon fiber sensing material for accuracy within the scope of small strain and precision.[bibliography: Yi Zhongchang
Gauge-length carbon fiber strain sensing devices, CN103868445A] carbon fiber sensing material since plasticity is strong, mechanical property is good and
The stable feature of long-term behaviour is suitble in conjunction with concrete structure member realize high-precision, Gao Naijiu to reach intelligentized design
Sensing material.
Still further aspect, RFID electronic label gradually start to be applied to manufacture as a kind of emerging product information monitoring technology
The logistics systems such as industry, retail business.By being placed in RFID electronic label in production link, and index product information is written
Electronic code, product is such as in interconnected system: title, material, implements standard, survey report important parameter at model.So as to
Tracing product is easily automated in the information of the links such as transmission, logistics, sale, thus greatly reduces or eliminates and obtain number
According to required labour, the accuracy of data is improved.
Summary of the invention
The object of the present invention is to provide the loss of prestress monitoring sides of prestressed component and the component that one kind can monitor
Method meets automation and reads the production for knowing prestressed component by merging long gauge length sensing technology and RFID tracer technique
The information such as information, service condition, position of orientation, to achieve the purpose that prestressed component is positioned in real time, tracks and monitored.
Invention also provides the manufacturing methods of above-mentioned prestressed component.
To achieve the above object, the prestressed component provided by the invention monitored adopts the following technical scheme that
A kind of prestressed component monitored, including prestressing force ontology, the presstressed reinforcing steel across prestressing force ontology, long gauge length
Microcircuit card, component surface output port, radio frequency electronic tag built in carbon fiber strain sensing unit, component；The length
Gauge-length carbon fiber strain sensing unit includes at least one long gauge-length carbon fiber strain sensor, and long gauge-length carbon fiber strain passes
Sensing unit is axially laid in presstressed reinforcing steel surface along presstressed reinforcing steel；The long gauge-length carbon fiber strain sensing unit passes through in component
After setting microcircuit card connection, then passes through wired or wireless data acquisition equipment via component surface output port and obtain long gauge length carbon
The signal of fiber strain sensing unit；The encryption identification that write-in represents the prestressed component in the radio frequency electronic tag is compiled
Code, and it is embedded to prestressing force body interior.
The long gauge-length carbon fiber strain sensing unit is that composite sleeve encapsulates long gauge-length carbon fiber strain sensing member
Part forms.
Loss of prestress monitoring method provided by the invention adopts the following technical scheme that
A kind of loss of prestress monitoring method to the above-mentioned prestressed component monitored, the component surface output port
It is placed outside component surface and realizes cable data acquisition mode to connect external data acquisition equipment, or passed by wireless signal
Defeated device realizes data acquisition mode；It is practical that component is obtained by the corresponding strain variation of each sensing unit of component inside
Behaviour in service prestress change is obtained by the long gauge-length carbon fiber strain sensing unit of inside configuration；Specific loss of prestress rate,
It calculates as follows
Wherein, ψ is current loss of prestress rate, and n is sensing element number, εiAfter completing for sensing element i component
Initial strain, ε* iIt is currently strained for sensing element i, piFor the corresponding theoretical strain weighted value in the position sensing element i.
Essential information in prestressed component manufacturing process is recorded in the local data base of corresponding encryption identification coding,
Strain time history peak value is periodically added in prestressed component use process later；By wireless radio frequency reader from prestressed component
Encryption identification coding is read in outside, transfers the corresponding information record of the component then at local data base tracking.
Manufacturing method provided by the invention adopts the following technical scheme that
A kind of manufacturing method to the above-mentioned prestressed component monitored, comprising the following steps:
Step 1: according to prestressed component size and prestress value, the long gauge-length carbon fiber strain sensing that design is wanted is first
The initial stage tensioning amount of the position of part, long gauge-length carbon fiber strain sensor number n and sensing element；
It is placed in initial value tensioning amount according to prestressed component force analysis, the value range of initial value tensioning amount is prestressed component
There are 1.5 times or more of maximum compression strain, not larger than 1000 microstrains in bottom；
Step 2: according to the number of unit n of step 1 and initial stage pre- tensioning, laying long gauge length carbon along presstressed reinforcing steel axial direction
Sensing element is pasted onto presstressed reinforcing steel surface by epoxy resin after application initial value tensioning, pasted by fiber strain sensing element
Natural curing to resin is fully cured to complete the installation of long gauge-length carbon fiber strain sensing unit after the completion；
Step 3: the long gauge-length carbon fiber strain sensing unit of step 2 conducting wire being connected to connect from one end of component and is accessed
Be printed with the microcircuit card of measuring circuit after, the conducting wire of the Measurement channel of microcircuit card is led into output port；Output end
Mouth is arranged between component surface, microcircuit card and output port conductor length and is not more than thickness of concrete cover；In micro- electricity
Passive type radio frequency electronic tag is nearby arranged in road plate, and identification number is written；
Step 4: prestressing force being placed in component, record presstressed reinforcing steel is from tensioning to putting answering for each sensing unit of an overall process
Become increment, calculates practical importing tensioning amount；It is practical to import presstressed reinforcing steel stress, it calculates as follows
Wherein, σ is the practical importing stress of presstressed reinforcing steel, and n is sensing element number, εiIt has been made for sensing element i component
It is strained at rear actual measurement, liFor the gauge length of sensing element i, piFor the corresponding theoretical strain weighted value in the position sensing element i, E is
Presstressed reinforcing steel elasticity modulus；
Step 5: the corresponding database of identification number in step 3 is provided, by prestressing force in prestressed component manufacturing process
Design value, application prestressing force, concrete and presstressed reinforcing steel material property information is drawn to be recorded in the database.
Wherein, for common prestressed component, the long gauge-length carbon fiber strain sensor number n that is laid on presstressed reinforcing steel
Value is 1；For having the prestressed component by curved analysis, presstressed reinforcing steel sliding detection requirement, long gauge-length carbon fiber strain sensing
Component number n is no less than 3；For the prestressed component of presstressed reinforcing steel sliding, dynamic analysis detection requirement, long gauge-length carbon fiber
Strain sensor number n is no less than 5.
Microcircuit card, component surface output port and radio frequency electronic tag are being placed in component dies built in the component
Tensioned prestressing bar, placing concrete again after suitable position in tool, make suitable for the prestressed component of pre-tensioning system and post stretching；
After prestressed component is used in structure, loss of prestress feelings in component are tracked by recording the strain variation in a period of time
Condition；It is convenient periodically by the peak records monitored in the corresponding database of component identification number according to loss of prestress situation
The production information, service condition, position of orientation information for knowing component are read, satisfaction is positioned in real time, tracks and monitored to component.
The beneficial effects of the present invention are:
(1) by being directly placed in long gauge-length carbon fiber strain sensing list on presstressed reinforcing steel at prestressed component production initial stage
Member directly obtains the practical stress distribution being placed in of presstressed reinforcing steel according to actual measurement strain, to ensure that the essence of prestressed monitoring
Degree.Since long gauge-length carbon fiber strain sensing unit has the characteristics that corrosion-resistant, creep resisting, it is suitable for prestressed component
Long term monitoring project.
(2) RFID technique used in is a kind of passive type radio frequency electronic tag, due to not needing battery power supply, because
This can satisfy the monitor task of the entire life cycle of concrete pre-stress component.After prestressed component completes,
What is recorded in RFID electronic label is prestressed component encryption identification coding, the regular peak value that all essential informations and later period update
It is recorded in the corresponding database of identification coding, to effectively prevent that information modify or sensitive information leaks.
(3) it is passed since the long gauge-length carbon fiber strain sensing unit and RFID electronic label that are placed in all meet wireless signal
Defeated requirement can quickly, on a large scale when acquiring vehicle loading wireless signal acquiring equipment by unmanned plane or automation signal
The information collection of multiple prestressed components in structure is completed, to effectively increase structure automation inspection AQL, improves structure dimension
Protect the efficiency of management.
Detailed description of the invention
Fig. 1 is the inside of the prestressed component that can be monitored comprising 1 long gauge-length carbon fiber strain sensor of the invention
Structural schematic diagram.
Fig. 2 is the inside of the prestressed component that can be monitored comprising 3 long gauge-length carbon fiber strain sensor of the invention
Structural schematic diagram.
Fig. 3 is the inside of the prestressed component that can be monitored comprising 5 long gauge-length carbon fiber strain sensor of the invention
Structural schematic diagram.
Fig. 4 is by vehicle loading wireless signal acquiring equipment, and what of the invention multiple of automation collection monitored pre- answers
The schematic diagram of power component.
In figure: 1, prestressed component ontology；2, the long gauge-length carbon fiber strain sensing unit of presstressed reinforcing steel surface setting；3,
Microcircuit card built in prestressed component；4, prestressed component surface output port；5, radio frequency electronic tag；6, prestressing force
Muscle.
Specific embodiment
Incorporated by reference to shown in Fig. 1 to Fig. 3, the present invention provides the prestressed components that one kind can monitor, including prestressing force ontology
1, across microcircuit card 3, component built in the presstressed reinforcing steel 6 of prestressing force ontology 1, long gauge-length carbon fiber strain sensing unit 2, component
Surface output port 4, radio frequency electronic tag 5.The long gauge-length carbon fiber strain sensing unit is composite sleeve envelope
Long gauge-length carbon fiber strain sensor is filled to form.The long gauge-length carbon fiber strain sensing unit 2 includes at least one length mark
Away from carbon fiber strain sensor.Long gauge-length carbon fiber strain sensor is axially laid in 6 table of presstressed reinforcing steel along presstressed reinforcing steel
Face；The long gauge-length carbon fiber strain sensing unit passes through after microcircuit card 3 built in component connects, then exports via component surface
Port 4 obtains the signal of long gauge-length carbon fiber strain sensing unit by wired or wireless data acquisition equipment；It is described wirelessly to penetrate
Write-in represents the encryption identification coding of the prestressed component in band electronic label 5, and is embedded to inside prestressing force ontology 1.Such as Fig. 1 institute
Show, for common prestressed component, the long gauge-length carbon fiber strain sensor number n value being laid on presstressed reinforcing steel is 1；Such as
Shown in Fig. 2, for having the prestressed component by curved analysis, presstressed reinforcing steel sliding detection requirement, long gauge-length carbon fiber strain sensing
Component number n is no less than 3；As shown in figure 3, for the prestressed component of presstressed reinforcing steel sliding, dynamic analysis detection requirement, it is long
Gauge-length carbon fiber strain sensor number n is no less than 5.
In conjunction with shown in Fig. 4, the component surface output port 4 is placed outside component surface to connect external data acquisition
Equipment realizes cable data acquisition mode, or realizes data acquisition mode by wireless signal transmission；Pass through structure
The corresponding strain variation of each sensing unit in part inside obtains component actual use situation prestress change by the length of inside configuration
Gauge-length carbon fiber strain sensing unit 2 obtains；Specific loss of prestress rate, calculates as follows
Wherein, ψ is current loss of prestress rate, and n is sensing element number, εiAfter completing for sensing element i component
Initial strain, ε* iIt is currently strained for sensing element i, piFor the corresponding theoretical strain weighted value in the position sensing element i.
Essential information in prestressed component manufacturing process is recorded in the local data base of corresponding encryption identification coding,
Strain time history peak value is periodically added in prestressed component use process later；By wireless radio frequency reader from prestressed component
Encryption identification coding is read in outside, transfers the corresponding information record of the component then at local data base tracking.
And the embodiment that the manufacturing method of the above-mentioned prestressed component monitored uses for, comprising the following steps:
Step 1: according to prestressed component size and prestress value, the long gauge-length carbon fiber strain sensing that design is wanted is first
The initial stage tensioning amount of the position of part, long gauge-length carbon fiber strain sensor number n and sensing element；
Since prestressed component is in production and use process, stress distribution, which will appear, decays and strain is caused to be born
The possibility of value, to ensure that monitoring result accuracy sensing element needs to be placed in initial value tensioning amount according to prestressed component force analysis,
The value range of initial value tensioning amount be prestressed component bottom occur maximum compression strain 1.5 times or more, not larger than 1000
Microstrain；
Step 2: according to the number of unit n of step 1 and initial stage pre- tensioning, laying long gauge length carbon along presstressed reinforcing steel axial direction
Sensing element is pasted onto presstressed reinforcing steel surface by epoxy resin after application initial value tensioning, pasted by fiber strain sensing element
Natural curing to resin is fully cured to complete the installation of long gauge-length carbon fiber strain sensing unit 2 after the completion；
Step 3: the long gauge-length carbon fiber strain sensing unit 2 of step 2 being connected with conducting wire from one end of component and is connect
After the microcircuit card 3 for being printed with measuring circuit entered, the conducting wire of the Measurement channel of microcircuit card is led into output port 4；It is long
Conducting wire need to reserve enough length between gauge-length carbon fiber strain sensing unit 2 and microcircuit card 3, to guarantee that microcircuit card 3 can
To be placed in the not easily damaged position of component inside；The setting of output port 4 in component surface, microcircuit card 3 and output port 4 it
Between conductor length be not more than thickness of concrete cover；Passive type radio frequency electronic tag 5 is set near microcircuit card 3,
And identification number is written；
Step 4: prestressing force being placed in component, record presstressed reinforcing steel is from tensioning to putting answering for each sensing unit of an overall process
Become increment, calculates practical importing tensioning amount；It is practical to import presstressed reinforcing steel stress, it calculates as follows
Wherein, σ is the practical importing stress of presstressed reinforcing steel, and n is sensing element number, εiIt has been made for sensing element i component
It is strained at rear actual measurement, liFor the gauge length of sensing element i, piFor the corresponding theoretical strain weighted value in the position sensing element i, E is
Presstressed reinforcing steel elasticity modulus；
Step 5: the corresponding database of identification number in step 3 is provided, by prestressing force in prestressed component manufacturing process
Design value, application prestressing force, concrete and presstressed reinforcing steel material property information is drawn to be recorded in the database.
Microcircuit card 3, component surface output port 4 and radio frequency electronic tag 5 are being placed in component built in the component
Tensioned prestressing bar, placing concrete again, the prestressed component system suitable for pre-tensioning system and post stretching after suitable position in mold
Make；After prestressed component is used in structure, prestressing force damage in component is tracked by recording the strain variation in a period of time
Lose situation；According to loss of prestress situation, periodically by the peak records monitored in the corresponding database of component identification number,
Convenient reading knows that the production information, service condition, position of orientation information of component, satisfaction are positioned in real time, track and supervised to component
Control.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
It for member, can also make several improvements without departing from the principle of the present invention, these improvement also should be regarded as of the invention
Protection scope.
Claims (6)
1. the prestressed component that one kind can monitor, which is characterized in that including prestressing force ontology (1), pass through prestressing force ontology (1)
Presstressed reinforcing steel (6), long gauge-length carbon fiber strain sensing unit (2), microcircuit card (3), component surface output port built in component
(4), radio frequency electronic tag (5)；The long gauge-length carbon fiber strain sensing unit (2) includes at least one long gauge length carbon fiber
Strain sensor is tieed up, long gauge-length carbon fiber strain sensor is axially laid in presstressed reinforcing steel (6) surface along presstressed reinforcing steel；Institute
After long gauge-length carbon fiber strain sensing unit is stated by microcircuit card (3) connection built in component, then via component surface output end
Mouth (4) obtains the signal of long gauge-length carbon fiber strain sensing unit by wired or wireless data acquisition equipment；It is described wirelessly to penetrate
Write-in represents the encryption identification coding of the prestressed component in band electronic label (5), and it is internal to be embedded to prestressing force ontology (1).
2. prestressed component according to claim 1, which is characterized in that the long gauge-length carbon fiber strain sensing unit is
Composite sleeve encapsulates long gauge-length carbon fiber strain sensor and forms.
3. a kind of loss of prestress monitoring method to the prestressed component that can be monitored as claimed in claim 1 or 2, feature
It is, the component surface output port (4), which is placed outside component surface, has line number to connect external data acquisition equipment realization
Data acquisition mode is realized according to acquisition mode, or by wireless signal transmission；Pass through each sensing of component inside
The corresponding strain variation of unit obtains component actual use situation prestress change and is strained by the long gauge-length carbon fiber of inside configuration
Sensing unit (2) obtains；Specific loss of prestress rate, calculates as follows
Wherein, ψ is current loss of prestress rate, and n is sensing element number, εiIt is initially answered after completing for sensing element i component
Become, ε* iIt is currently strained for sensing element i, piFor the corresponding theoretical strain weighted value in the position sensing element i；
Essential information in prestressed component manufacturing process is recorded in the local data base of corresponding encryption identification coding, later
Strain time history peak value is periodically added in prestressed component use process；Through wireless radio frequency reader outside prestressed component
Encryption identification coding is read, transfers the corresponding information record of the component then at local data base tracking.
4. a kind of manufacturing method of the prestressed component according to claim 1 or 2 monitored, which is characterized in that including
Following steps:
Step 1: according to prestressed component size and prestress value, long gauge-length carbon fiber strain sensor that design is wanted
The initial stage tensioning amount of position, long gauge-length carbon fiber strain sensor number n and sensing element；
It is placed in initial value tensioning amount according to prestressed component force analysis, the value range of initial value tensioning amount is prestressed component bottom
There are 1.5 times or more of maximum compression strain, not larger than 1000 microstrains；
Step 2: according to the number of unit n of step 1 and initial stage pre- tensioning, laying long gauge-length carbon fiber along presstressed reinforcing steel axial direction
Sensing element is pasted onto presstressed reinforcing steel surface by epoxy resin after application initial value tensioning, pastes and complete by strain sensor
Natural curing to resin is fully cured to complete the installation of long gauge-length carbon fiber strain sensing unit (2) afterwards；
Step 3: the long gauge-length carbon fiber strain sensing unit (2) of step 2 being connected to connect from one end of component with conducting wire and is accessed
The microcircuit card (3) for being printed with measuring circuit after, the conducting wire of the Measurement channel of microcircuit card is led into output port (4)；
Conductor length is arranged between component surface, microcircuit card (3) and output port (4) in output port (4) protects no more than concrete
Covering thickness；Nearby passive type radio frequency electronic tag (5) are set in microcircuit card (3), and identification number is written；
Step 4: prestressing force being placed in component, record presstressed reinforcing steel increases from tensioning to the strain for putting each sensing unit of an overall process
Amount calculates practical importing tensioning amount；It is practical to import presstressed reinforcing steel stress, it calculates as follows
Wherein, σ is the practical importing stress of presstressed reinforcing steel, and n is sensing element number, εiIt is real after completing for sensing element i component
Survey strain, liFor the gauge length of sensing element i, piFor the corresponding theoretical strain weighted value in the position sensing element i, E is prestressing force
Muscle elasticity modulus；
Step 5: the corresponding database of identification number in step 3 being provided, prestressed stretch-draw in prestressed component manufacturing process is set
Evaluation, application prestressing force, concrete and presstressed reinforcing steel material property information are recorded in the database.
5. manufacturing method according to claim 4, for common prestressed component, the long gauge length carbon that is laid on presstressed reinforcing steel
Fiber strain sensing element number n value is 1；For there is the prestressed component by curved analysis, presstressed reinforcing steel sliding detection requirement,
Long gauge-length carbon fiber strain sensor number n is no less than 3；For presstressed reinforcing steel sliding, dynamic analysis detection requirement it is pre-
Stress members, long gauge-length carbon fiber strain sensor number n are no less than 5.
6. manufacturing method according to claim 4 or 5, which is characterized in that microcircuit card (3), component built in the component
Surface output port (4) and radio frequency electronic tag (5) stretch-draw prestressing force again after suitable position in being placed in element mold
Muscle, placing concrete make suitable for the prestressed component of pre-tensioning system and post stretching；When prestressed component is used in structure
Afterwards, loss of prestress situation in component is tracked by recording the strain variation in a period of time；It is fixed according to loss of prestress situation
Phase by the peak records monitored in the corresponding database of component identification number, convenient reading know component production information,
Service condition, position of orientation information, satisfaction are positioned in real time, track and are monitored to component.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274715A (en) * | 2019-06-24 | 2019-09-24 | 中铁大桥科学研究院有限公司 | A kind of loss of prestress detection method |
| CN111272116A (en) * | 2020-04-24 | 2020-06-12 | 南京泰普森自动化设备有限公司 | Elasticity measuring device |
| CN112179264A (en) * | 2020-09-22 | 2021-01-05 | 华东交通大学 | Long gauge length strain-based prestressed carbon fiber plate bridge reinforcing effect monitoring method |
| CN113567016A (en) * | 2021-08-03 | 2021-10-29 | 中铁大桥科学研究院有限公司 | Bridge effective prestress monitoring method based on distributed optical fiber technology |
| CN114136769A (en) * | 2021-12-14 | 2022-03-04 | 上海悍马建筑科技有限公司 | Carbon fiber plate capable of strain detection based on image processing and use method |
| CN117236140A (en) * | 2023-11-10 | 2023-12-15 | 中冶建筑研究总院（深圳）有限公司 | Method model and system for predicting prestress failure of containment vessel |
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| CN112179264B (en) * | 2020-09-22 | 2021-11-19 | 华东交通大学 | Long gauge length strain-based prestressed carbon fiber plate bridge reinforcing effect monitoring method |
| CN113567016A (en) * | 2021-08-03 | 2021-10-29 | 中铁大桥科学研究院有限公司 | Bridge effective prestress monitoring method based on distributed optical fiber technology |
| CN113567016B (en) * | 2021-08-03 | 2024-03-01 | 中铁大桥科学研究院有限公司 | Bridge effective prestress monitoring method based on distributed optical fiber technology |
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| CN117236140A (en) * | 2023-11-10 | 2023-12-15 | 中冶建筑研究总院（深圳）有限公司 | Method model and system for predicting prestress failure of containment vessel |
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