CN217424735U - Prestress carbon fiber plate reinforcing system life-cycle health monitoring system - Google Patents
Prestress carbon fiber plate reinforcing system life-cycle health monitoring system Download PDFInfo
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- CN217424735U CN217424735U CN202220852606.8U CN202220852606U CN217424735U CN 217424735 U CN217424735 U CN 217424735U CN 202220852606 U CN202220852606 U CN 202220852606U CN 217424735 U CN217424735 U CN 217424735U
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Abstract
The utility model discloses a life-span health monitoring system of a prestressed carbon fiber plate reinforcing system, which is applied to the prestressed carbon fiber plate reinforcing system, wherein the prestressed carbon fiber plate reinforcing system comprises a carbon fiber anchorage device, a prestressed carbon fiber plate, a tension rod and a chemical anchor bolt; the method is characterized in that: the prestress carbon fiber plate reinforcing system life-span monitoring system comprises a force sensor, a bolt loosening sensor, a fiber grating strain sensor meter, an inclinometer, a high-definition camera, a data acquisition station and a monitoring center. The utility model discloses prestressing force carbon fiber plate reinforcing system life-span health monitoring system installation and maintenance cost are lower, can replace the manual work to patrol and examine and the periodic inspection, and the sexual valence is than higher.
Description
Technical Field
The utility model relates to a belong to civil engineering and consolidate system health monitoring technical field, especially a prestressing force carbon fiber plate consolidates system life-cycle health monitoring system.
Background
The traffic construction of China is developed at a high speed for decades, a large number of bridges are built, and nowadays, the bridge enters a disease and accident multiple period. According to incomplete statistics, approximately 30% of bridges in a highway system need to be reinforced, and 17 ten thousand holes of 32-meter-span bridges with load grades improved from 25T to 30T in a railway system; a large amount of maintenance and reinforcement work is needed for a plurality of municipal bridges such as viaducts, overpasses and the like in cities.
A method for reinforcing the prestressed carbon fibre plate as one of the mainstream reinforcing methods in bridge boundary includes such steps as pre-stressing and stretching the member to be reinforced by the carbon fibre coated with epoxy adhesive to repair the deformation and crack, sticking the carbon fibre plate on the member, and anchoring it. The method has the advantages of no trace left in reinforcement and repair, high strength, corrosion resistance, quick construction and the like.
However, with the increase of the reinforcing time of the prestressed carbon fiber plate and the increase of the load of the bridge, the prestress loss is caused over time, the bearing capacity is reduced, and the service life is shortened. If the problems are not discovered in time and correct countermeasures are taken, the traffic safety and the development are influenced. However, most of existing carbon fiber plate reinforcing projects neglect to perform life-cycle health monitoring on the whole system, the monitoring method is single, or the monitoring is only performed in a construction process, and the like, so that not only can the comprehensive health condition of the bridge reinforcing system be obtained, but also the health technical condition of the bridge cannot be judged, and even scientific management and safety early warning of the bridge are not facilitated.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model provides a prestressing force carbon fiber plate consolidates system life-span health monitoring system at first, utilizes stress, meeting an emergency, temperature, bolt not hard up, the amount of deflection of sensor technique in to the system to carry out real-time dynamic monitoring. And secondly, performing data acquisition and software analysis processing in a wired or wireless mode. And finally, delivering the monitoring and analyzing result to the client through the Internet. Therefore, a special, scientific, complete and whole life cycle health monitoring system is formed, and intelligent monitoring of bridge maintenance is achieved.
In order to realize the purpose of the utility model, the technical scheme of the utility model as follows:
a full-life monitoring system of a prestressed carbon fiber plate reinforcing system is applied to the prestressed carbon fiber plate reinforcing system, and the prestressed carbon fiber plate reinforcing system comprises a carbon fiber anchorage device, a prestressed carbon fiber plate, a tension rod and a chemical anchor bolt; the prestress carbon fiber plate reinforcing system life-span monitoring system comprises a force sensor, a bolt loosening sensor, a fiber bragg grating strain meter, an inclinometer, a high-definition camera, a data acquisition station and a monitoring center; the force cell sensor is installed on the stretch-draw pole, and the inclinometer sets up on the prestressing force carbon fiber board, the bolt looseness sensor sets up on stretch-draw pole and chemical crab-bolt, fiber grating strain sensor sets up on the carbon fiber ground tackle, the high definition camera sets up the one side at the prestressing force carbon fiber board, the data acquisition station is connected with force cell sensor, bolt looseness sensor, fiber grating strainometer, inclinometer, high definition camera communication respectively, the surveillance center is connected with the data acquisition station communication.
Further, the load cell is one of a magnetic flux sensor and a pressure sensor.
The system further comprises a client side, and the client side is in communication connection with the data acquisition station.
The utility model discloses a theory of operation is: a force transducer monitors the cable force of the prestressed carbon fiber plate; the bolt loosening sensor monitors the loosening conditions of the tension rod and the chemical anchor bolt; monitoring the stress of the carbon fiber anchorage by using a fiber bragg grating strain sensor; monitoring the downwarping condition of the reinforcing section by using an inclinometer; the data acquisition station is responsible for acquiring real-time monitoring data of each sensor; the monitoring center is responsible for storing, analyzing and processing data and forming an opinion monitoring result; and finally, the client can obtain a real-time monitoring result and state early warning through a computer.
The utility model discloses a monitoring method has not only fused each type sensing technology, accompanies component full life cycle moreover, and structure monitoring content is comprehensive, has compensatied the not enough of current single monitoring. And secondly, the used sensor can be regularly calibrated, maintained and replaced, so that the monitoring system is stable and reliable, and the long-term measurement precision is guaranteed. And a scientific and technological information monitoring method is used for health navigation protection of an operating bridge, so that the whole-life health monitoring of the prestressed carbon fiber plate reinforcing system is realized.
The beneficial effects of the utility model
(1) The utility model discloses a harmless monitoring method, and its monitoring sensor can regularly calibrate, maintain and change, to carbon fiber plate reinforcement system not damaged, destruction, the installation is swift, easy operation is convenient.
(2) The utility model discloses not only can be all-round, whole reinforcement system operating condition of full-life real-time supervision, but also can the accurate disease position of appearing of judging.
(3) The utility model discloses the monitoring content and the method that cover are more comprehensive, solve that traditional monitoring means is single, monitoring data utilization efficiency is low, consume time long scheduling problem.
(4) The utility model discloses can regard as the control of reinforcement engineering work progress, and construction quality controls easily.
(5) The utility model discloses a prestressing force carbon fiber plate reinforcement system life-span health monitoring system installation and maintenance cost are lower, can replace the manual work to patrol and examine and the periodic inspection, and the sexual valence is higher.
(6) When the reinforcing system structure is abnormal, the monitoring system can give an early warning in time, scientific and reasonable management and maintenance suggestions and suggestions are formed, and intelligent monitoring and scientific management and maintenance are achieved.
Drawings
Fig. 1 is a schematic structural diagram of a full-life monitoring system of a prestressed carbon fiber plate reinforcing system according to the present invention;
fig. 2 is a mounting structure diagram of the whole life monitoring system of the prestressed carbon fiber plate reinforcing system of the present invention;
FIG. 3 is another installation structure diagram of the whole life monitoring system of the prestressed carbon fiber plate reinforcing system of the present invention;
in the figure:
1-a carbon fiber anchorage; 2-prestressed carbon fiber plate; 3, pressing a plate; 4-fixing the end support; 5-stretching a pull rod; 6-tensioning end support and 7-chemical anchor bolt; 8-a force sensor; 9-bolt loosening sensor; 10-fiber grating strain gauge; 11-inclinometer; 12-high definition camera; 13-a data acquisition station; 14-a monitoring center; 15-user terminal.
Detailed Description
In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.
Referring to fig. 2 and 3, a system for monitoring the total life of a prestressed carbon fiber plate reinforcement system is applied to the prestressed carbon fiber plate reinforcement system, and the prestressed carbon fiber plate reinforcement system comprises a carbon fiber anchorage device 1, a prestressed carbon fiber plate 2, a tension rod 5 and a chemical anchor bolt 7; the prestress carbon fiber plate reinforcing system life-span monitoring system comprises a force sensor 8, a bolt loosening sensor 9, a fiber grating strain sensor 10, an inclinometer 11, a high-definition camera 12, a data acquisition station 13 and a monitoring center 14; force cell sensor 8 installs on tension rod 5, and inclinometer 11 sets up on prestressing force carbon fiber plate 2, bolt looseness sensor 9 sets up on tension rod 5 and chemical crab-bolt 7, fiber grating strainometer 10 sets up on carbon fiber anchor 1, high definition camera 12 sets up the one side at prestressing force carbon fiber plate 2, data acquisition station 13 is connected with force cell sensor 8, bolt looseness sensor 9, fiber grating strainometer 10, inclinometer 11, high definition camera 12 communication respectively, monitoring center 14 is connected with data acquisition station 13 communication.
The installation process of the prestress carbon fiber plate reinforcing system life-span monitoring system is as follows:
1. and (3) construction preparation, wherein before construction, paying off and accurate positioning are carried out on the reinforcing part of the bridge according to a design drawing, and the central lines of the anchoring end and the tensioning end are ensured to be on the same straight line.
2. And (4) cleaning and leveling the foundation, if cracks exist, firstly repairing, and then repairing and leveling by using a repairing material.
3. And (3) punching and bar planting the chemical anchor bolts 7, drilling holes in the anchoring area, the tensioning area and the pressing plate according to the lofting position, and implanting the required chemical anchor bolts 7.
4. Installing a prestressed carbon fiber plate reinforcing system and a monitoring system thereof as shown in FIGS. 2 to 3
(1) And (3) mounting a fixed end support, a tensioning end support, a prestressed carbon fiber cable (comprising a prestressed carbon fiber plate and an anchorage device), tensioning a pull rod, centering, leveling and fastening.
(2) Respectively installing various monitoring sensors, wherein:
a. the feed-through force measuring sensor 8 (a magnetic flux sensor or a pressure sensor) is arranged in the middle or in the front of the tension rod 5 and used for monitoring the cable force of the prestressed carbon fiber plate.
The magnetic flux sensor is made based on the magnetoelastic effect principle of ferromagnetic materials. That is, when the ferromagnetic material is subjected to a change in external mechanical load, the magnetization (magnetic permeability) inside the ferromagnetic material changes, and the stress of the member is measured by measuring the change in magnetic permeability of the member made of the ferromagnetic material. The stress of the cable and the prestressed tendon can be effectively measured, and the method is a nondestructive testing technology. The utility model discloses used magnetic flux sensor adopts two half formula assembly structure, at first with two half formula structure suit in stretch-draw pole surface, then carries out the coiling at two half formula structure surface again, installs the sealed protection of safety cover at last. The structure is convenient to disassemble, assemble, maintain and replace, and can be used for periodically calibrating the steel bar by increasing and decreasing the cross section area of the ferromagnetic material in the through hole of the sensor and the standard value of factory calibration, so that the measurement precision of the sensor is ensured.
b. The fiber grating strain gauge 10 is mounted on the upper surface of the anchorage device in a spot welding manner and is used for monitoring the stress condition of the prestressed carbon fiber plate. If the strain gauge needs to be replaced, only the welding point needs to be removed, and the whole service life of the carbon plate reinforcing system is ensured to be monitored.
The fiber grating strain gauge converts signals such as measured stress strain into optical signals to be output, and the signals are transmitted to a fiber grating analyzer to display the equivalent stress strain. The fiber grating strain sensor has the advantages of high sensitivity, no electromagnetic interference, good electrical insulation, corrosion resistance, no electric spark, capability of being used in flammable and explosive environments and the like.
c. The bolt loosening sensor 9 is bonded on the exposed end faces of the tension rod 5 and the screw rod of the chemical anchor bolt 7, is convenient to disassemble, assemble, maintain and replace, and is used for monitoring the loosening condition of the bolt of the reinforcement system.
The bolt looseness sensor is installed on one end face of the bolt in a non-invasive installation mode, ultrasonic waves are transmitted to the interior of the bolt, ultrasonic signals are received and processed, the length and the elongation of the bolt are calculated, and states of the bolt, such as pretightening force, loading force, looseness, fatigue and breakage, are further judged. The sensor has the advantages of no damage to the original structure and strength of the bolt, accurate measurement, convenient installation, firmness, durability, ultralow power consumption, remote monitoring, safety, reliability and the like.
d. The inclinometer 11 is adhered to the middle of the back veneer of the prestressed carbon fiber plate 2 and used for monitoring the deflection condition of the bridge reinforcing system. And during regular calibration, only one set of standard inclinometer needs to be temporarily installed at the adjacent vacant span of the corresponding reinforcing beam bottom.
The inclinometer is a single-shaft and double-shaft inclination testing sensor with wide range and high precision, adopts high-precision differential capacitance as a sensitive element, can be used for measuring and monitoring unidirectional and bidirectional dynamic inclination angles and static inclination angles of various engineering structures such as piers, bridges, bridge towers, buildings, foundation towers of wind power stations and the like, and has the characteristics of small volume, light weight, high precision and convenient use.
5. A high-definition camera 12 is installed near the prestressed carbon fiber plate reinforcing system, and the device can be used for monitoring the construction process and real-time monitoring after operation.
6. The carbon plates are sequentially and hierarchically stretched, and a force sensor can be adopted to control the stretching force during stretching.
7. And arranging a monitoring system data acquisition station for data acquisition of various sensors.
8. And storing, analyzing and processing the acquired data in time, and alarming in abnormal conditions.
9. And finally, automatically generating a monitoring report and transmitting the monitoring report to a management department of the user side through the Internet.
As shown in fig. 1, the system is based on advanced sensor technology and modern communication means, and combines computer software and hardware technology, can realize long-term monitoring of items such as the use environment, stress-strain condition, deflection and the like of the prestressed carbon fiber plate reinforcement system, and has the advantages of automatic data acquisition and storage, abnormal condition alarm, historical data query, safety evaluation, automatic generation of monitoring reports and the like. Professional bridge prestress carbon fiber plate reinforcement and structure health monitoring are provided for clients, and safe operation and service life of a bridge reinforcement structure are guaranteed.
Wherein the data processing logic of the reinforcement of the prestressed carbon fiber plate of the bridge and the structural health monitoring is as follows:
the value detected by the pressure sensor/magnetic flux sensor is a force value, unit: kN; the numerical value that bolt looseness sensor detected is angle, unit: (iv) DEG; the value detected by the fiber bragg grating strain gauge is strain, and the unit is as follows: mu epsilon; the value detected by the inclinometer is deflection, unit: mm; the numerical values detected by the high-definition camera are as follows: and (5) polling and recording.
The normal range setting of the monitoring data is as follows:
pressure sensor/magnetic flux sensor: (0.25 +/-5%) multiplied by the designed breaking force value of the prestressed carbon fiber plate;
bolt looseness sensor: 0-10 °;
fiber grating strain gauge: (0.5 +/-10%) multiplied by the designed breaking force value of the prestressed carbon fiber plate)/the elastic modulus of the anchorage device;
an inclinometer: the calculated span of the measured beam body is less than or equal to 500;
high-definition camera: the prestressed carbon fiber plate reinforcing system is free of cracks and falling in the inspection video.
And when the acquired data is not set in the normal range, the system gives an abnormal condition alarm.
Although the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (3)
1. A life-span health monitoring system of a prestressed carbon fiber plate reinforcing system is applied to the prestressed carbon fiber plate reinforcing system, wherein the prestressed carbon fiber plate reinforcing system comprises a carbon fiber anchorage device, a prestressed carbon fiber plate, a tension rod and a chemical anchor bolt; the method is characterized in that: the prestress carbon fiber plate reinforcing system life-span monitoring system comprises a force sensor, a bolt loosening sensor, a fiber bragg grating strain sensor meter, an inclinometer, a high-definition camera, a data acquisition station and a monitoring center; the force cell sensor is installed on the stretch-draw pole, and the inclinometer sets up on the prestressing force carbon fiber board, bolt not hard up sensor sets up on stretch-draw pole and chemical crab-bolt, fiber grating strain transducer sets up on the carbon fiber ground tackle, the high definition camera sets up the one side at the prestressing force carbon fiber board, the data acquisition station is connected with force cell sensor, bolt not hard up sensor, fiber grating strain transducer meter, inclinometer, high definition camera communication respectively, surveillance center and data acquisition station communication are connected.
2. The prestressed carbon fiber plate reinforcement system life-span health monitoring system of claim 1, wherein: the load cell is one of a magnetic flux sensor and a pressure sensor.
3. The prestressed carbon fiber plate reinforcement system life-span health monitoring system of claim 1, wherein: the system further comprises a client side, and the client side is in communication connection with the data acquisition station.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220852606.8U CN217424735U (en) | 2022-04-13 | 2022-04-13 | Prestress carbon fiber plate reinforcing system life-cycle health monitoring system |
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| CN202220852606.8U CN217424735U (en) | 2022-04-13 | 2022-04-13 | Prestress carbon fiber plate reinforcing system life-cycle health monitoring system |
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| CN202220852606.8U Active CN217424735U (en) | 2022-04-13 | 2022-04-13 | Prestress carbon fiber plate reinforcing system life-cycle health monitoring system |
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