混凝土中基于预埋式LPFG波长解调的耐久性健康监测
|
摘要
为了实现混凝土结构的耐久性健康监测,提出基于长周期光纤光栅(LPFG)折射率特性,将LPFG预埋入混凝土结构中,通过对LPFG的波长解调,实现钢筋锈蚀监测。钢筋发生锈蚀后,钢筋钝化层表面附近Cl-浓度的改变将影响钢筋周围混凝土的折射率,对LPFG进行波长解调并进行温度补偿,获知环境折射率变化进而判断钢筋的锈蚀程度。实验结果表明,钢筋锈蚀率达到12.6%时,对应的锈水折射率1.353 6仍小于LPFG可监测到的折射率范围,并实验获得了LPFG谐振波长漂移量与钢筋锈蚀率之间的对应关系。本方法无需化学试剂,全光纤化,能够准确地实现混凝土结构中钢筋锈蚀的早期至中期监测。
To realize the durability health monitoring of the concrete structures,a new technique based on the refractive index characteristic of long period fiber grating(LPFG)to measure the corrosion of steel on concrete structures is proposed in this paper.A notch-shaped pedestal is designed and a long period fiber grating is laid on the steel surface.With this method,the Cl-concentrations of the steel resulting from the steel corrosion would be transformed into the refractive index of the long period fiber grating.The corrosion rate of steel could be obtained by analyzing the change of the spectrum,and then the steel corrosion depth could be measured.From the experiment,it is found that the corrosion rate reaches 12.6%,and the surrounding refractive index changes to 1.353 6 which is within the monitoring range of the LPFG.And the relationship between the wavelength shift and the corrosion rate is obtained.This measurement could be used to monitor the early to medium term corrosion of reinforcing steel in concrete structures.
To realize the durability health monitoring of the concrete structures,a new technique based on the refractive index characteristic of long period fiber grating(LPFG)to measure the corrosion of steel on concrete structures is proposed in this paper.A notch-shaped pedestal is designed and a long period fiber grating is laid on the steel surface.With this method,the Cl-concentrations of the steel resulting from the steel corrosion would be transformed into the refractive index of the long period fiber grating.The corrosion rate of steel could be obtained by analyzing the change of the spectrum,and then the steel corrosion depth could be measured.From the experiment,it is found that the corrosion rate reaches 12.6%,and the surrounding refractive index changes to 1.353 6 which is within the monitoring range of the LPFG.And the relationship between the wavelength shift and the corrosion rate is obtained.This measurement could be used to monitor the early to medium term corrosion of reinforcing steel in concrete structures.
引文
[1]HONG Nai-feng.Corrosion of reinforced concrete infras-tructure and total life cycle cost analysis[J].ArchitectureTechnology,2002,33(4):254-258.洪乃丰.钢筋混凝土基础设施的腐蚀与全寿命经济分析[J].建筑技术,2002,33(4):254-258.
[2]Rosalbino F,Angelini E,MacciòD,et al.Application ofEIS to assess the effect of rare earths small addition onthe corrosion behaviour of Zn-5%Al(Galfan)alloy inneutral aerated sodium chloride solution[J].Electrochimi-ca Acta,2009,54(4):1204-1209.
[3]Legat A.Monitoring of steel corrosion in concrete by e-lectrode arrays and electrical resistance probes[J].Electrochimica Acta,2007,52(27):7590-7598.
[4]Rob B.Poldel,Test methods for on site measurement ofresistivity of concrete-a RILEMTC-154 technical recom-mendation[J].Construction and Building Materials,2001,15(2):125-131.
[5]Elsa V Pereira,Rita B Figueira,Maria M L Salta,et al.Agalvanic sensor for monitoring the corrosion condition ofthe concrete reinforcing steel:relationship between thegalvanic and the corrosion currents[J].Sensors,2009,9(11):8391-8398.
[6]Rumiche F,Indacochea J E,Wang M L.Detection and mo-nitoring of corrosion in structural carbon steels using elec-tro-magnetic sensors[J].Journal of Engineering Materialsand Technology,2008,130(3):031008-1-7.
[7]Shruti Sharma,Abhijit Mukherjee.Longitudinal guided wa-ves for monitoring chloride corrosion in reinforcing bars inconcrete[J].Structural Health Monitoring November,2010,9(6):555-567.
[8]LI Ai-qun,ZHOU Guang-dong.Progress and prospect of fi-ber Bragg grating sensors measurement technology(II):displacement,acceleration,cable force,corrosion,andcrack measurement[J].Journal of Southeast University(natural science edition),2009,39(6):1307-1314.李爱群,周广东.光纤Bragg光栅传感器测试技术研究进展与展望(II):位移、加速度、索力、钢筋锈蚀、裂缝测试[J].东南大学学报(自然科学版).2009,39(6):1307-1314.
[9]LI Hui,OU Jin-ping,ZHOU Zhi.Applications of optical fi-bre Bragg gratings sensing technology-based smart staycables[J].Optics and Lasers in Engineering,2009,47(10):1077-1084.
[10]Simon K T Grattan,Su E Taylor,Tong Sun,et al.Grattan.Monitoring of corrosion in structural reinforcing bars:per-formance comparison using in situ fiber-optic and electricwire strain gauge systems[J].IEEE Sensors Journal,2009,9(11):1494-1502.
[11]Bennett K D,Mclaughlin L R.Monitoring of corrosion insteel structures using optical fiber sensors[A].Proc.ofSPIE[C].1995,2446:48-59.
[12]HU Wen-bin,CAI Han-li,YANG Ming-hong,et al.Fe-C-coated fibre Bragg grating sensor for steel corrosion mo-nitoring[J].Corrosion Science,2011,53(5):1933-1938.
[13]GAO Jun-qi,WU Jin,LI Jun,et al.Monitoring of corrosionin reinforced concrete structure using Bragg grating sens-ing[J].NDT&E International,2011,44(2):202-205.
[14]SHAO Min,QIAO Xue-guang,FENG De-quan,et al.Theo-retical and experimental study on seismic sensor basedon fiber Bragg grating[J].Journal of Optoelectronics.Laser,2012,23(3):418-424.邵敏,乔学光,冯德全,等.基于光纤Bragg光栅的地震检波器的理论与实验研究[J].光电子.激光,2012,23(3):418-424.
[15]JIANG Ming-shun,MENG Ling,SUI Qing-qing,et al.High-.1544.光电子.激光2012年第23卷sensitivity vibration detection system based on double-LPFG demodulation[J].Journal Optoelectronics.Laser,2011,22(8):1207-1210.姜明顺,孟玲,隋青美,等.基于双LPFG解调的高灵敏度振动检测系统[J].光电子.激光,2011,22(8):1207-1210.
[16]ZHAO Hong-xia,DING Zhi-qun,WANG Jin-xia,et al.Ahigher sensitively concentration sensor using long-periodfiber grating[J].Journal Optoelectronics.Laser,2009,20(6):742-744.赵洪霞,丁志群,王金霞,等.一种基于LPFG高灵敏度浓度传感器[J].光电子.激光,2009,20(6):742-744.
[17]WANG Yan,LIANG Da-kai,ZHOU Bin.Measurement ofthermal expansion coefficient of material by long periodfiber grating[J].Journal of Nanjing University of Aero-nautics&Astronautics,2007,39(5):654-658.王彦,梁大开,周兵.长周期光纤光栅用于材料热膨胀系数的测量[J].南京航空航天大学学报,2007,39(5):655-658.
[18]HU Xing-liu,LIANG Da-kai,LU Guan,et al.Simultaneousdiscriminating measurement of temperature and strainbased on a long period grating′s spectrum[J].Spectros-copy and Spectral Analysis,2010,30(3):851-854.胡兴柳,梁大开,陆观,等.基于单长周期光纤光栅光谱特性的温度和应变同时区分测量[J].光谱学与光谱分析,2010,30(3):851-854.
[19]Libish T M,Bobby M C,Linesh J,et al.Nampoori andRadhakrishnan P.Refractive index and temperature de-pendent displacements of resonant peaks of long periodgrating inscribed in hydrogen loaded SMF-28 fiber[J].Optoelectronics Letters,2012,8(2):101-104.
[20]WANG Yan,LIANG Da-kai,ZHOU Bing.Measurement ofsteel corrosion in concrete structures by analyzing long-period fiber grating spectrum character[J].Spectroscopyand Spectral Analysis,2008,28(11):2660-2664.王彦,梁大开,周兵.基于光纤光栅光谱分析的混凝土结构钢筋锈蚀监测[J].光谱学与光谱分析,2008,28(11):2660-2664.
[2]Rosalbino F,Angelini E,MacciòD,et al.Application ofEIS to assess the effect of rare earths small addition onthe corrosion behaviour of Zn-5%Al(Galfan)alloy inneutral aerated sodium chloride solution[J].Electrochimi-ca Acta,2009,54(4):1204-1209.
[3]Legat A.Monitoring of steel corrosion in concrete by e-lectrode arrays and electrical resistance probes[J].Electrochimica Acta,2007,52(27):7590-7598.
[4]Rob B.Poldel,Test methods for on site measurement ofresistivity of concrete-a RILEMTC-154 technical recom-mendation[J].Construction and Building Materials,2001,15(2):125-131.
[5]Elsa V Pereira,Rita B Figueira,Maria M L Salta,et al.Agalvanic sensor for monitoring the corrosion condition ofthe concrete reinforcing steel:relationship between thegalvanic and the corrosion currents[J].Sensors,2009,9(11):8391-8398.
[6]Rumiche F,Indacochea J E,Wang M L.Detection and mo-nitoring of corrosion in structural carbon steels using elec-tro-magnetic sensors[J].Journal of Engineering Materialsand Technology,2008,130(3):031008-1-7.
[7]Shruti Sharma,Abhijit Mukherjee.Longitudinal guided wa-ves for monitoring chloride corrosion in reinforcing bars inconcrete[J].Structural Health Monitoring November,2010,9(6):555-567.
[8]LI Ai-qun,ZHOU Guang-dong.Progress and prospect of fi-ber Bragg grating sensors measurement technology(II):displacement,acceleration,cable force,corrosion,andcrack measurement[J].Journal of Southeast University(natural science edition),2009,39(6):1307-1314.李爱群,周广东.光纤Bragg光栅传感器测试技术研究进展与展望(II):位移、加速度、索力、钢筋锈蚀、裂缝测试[J].东南大学学报(自然科学版).2009,39(6):1307-1314.
[9]LI Hui,OU Jin-ping,ZHOU Zhi.Applications of optical fi-bre Bragg gratings sensing technology-based smart staycables[J].Optics and Lasers in Engineering,2009,47(10):1077-1084.
[10]Simon K T Grattan,Su E Taylor,Tong Sun,et al.Grattan.Monitoring of corrosion in structural reinforcing bars:per-formance comparison using in situ fiber-optic and electricwire strain gauge systems[J].IEEE Sensors Journal,2009,9(11):1494-1502.
[11]Bennett K D,Mclaughlin L R.Monitoring of corrosion insteel structures using optical fiber sensors[A].Proc.ofSPIE[C].1995,2446:48-59.
[12]HU Wen-bin,CAI Han-li,YANG Ming-hong,et al.Fe-C-coated fibre Bragg grating sensor for steel corrosion mo-nitoring[J].Corrosion Science,2011,53(5):1933-1938.
[13]GAO Jun-qi,WU Jin,LI Jun,et al.Monitoring of corrosionin reinforced concrete structure using Bragg grating sens-ing[J].NDT&E International,2011,44(2):202-205.
[14]SHAO Min,QIAO Xue-guang,FENG De-quan,et al.Theo-retical and experimental study on seismic sensor basedon fiber Bragg grating[J].Journal of Optoelectronics.Laser,2012,23(3):418-424.邵敏,乔学光,冯德全,等.基于光纤Bragg光栅的地震检波器的理论与实验研究[J].光电子.激光,2012,23(3):418-424.
[15]JIANG Ming-shun,MENG Ling,SUI Qing-qing,et al.High-.1544.光电子.激光2012年第23卷sensitivity vibration detection system based on double-LPFG demodulation[J].Journal Optoelectronics.Laser,2011,22(8):1207-1210.姜明顺,孟玲,隋青美,等.基于双LPFG解调的高灵敏度振动检测系统[J].光电子.激光,2011,22(8):1207-1210.
[16]ZHAO Hong-xia,DING Zhi-qun,WANG Jin-xia,et al.Ahigher sensitively concentration sensor using long-periodfiber grating[J].Journal Optoelectronics.Laser,2009,20(6):742-744.赵洪霞,丁志群,王金霞,等.一种基于LPFG高灵敏度浓度传感器[J].光电子.激光,2009,20(6):742-744.
[17]WANG Yan,LIANG Da-kai,ZHOU Bin.Measurement ofthermal expansion coefficient of material by long periodfiber grating[J].Journal of Nanjing University of Aero-nautics&Astronautics,2007,39(5):654-658.王彦,梁大开,周兵.长周期光纤光栅用于材料热膨胀系数的测量[J].南京航空航天大学学报,2007,39(5):655-658.
[18]HU Xing-liu,LIANG Da-kai,LU Guan,et al.Simultaneousdiscriminating measurement of temperature and strainbased on a long period grating′s spectrum[J].Spectros-copy and Spectral Analysis,2010,30(3):851-854.胡兴柳,梁大开,陆观,等.基于单长周期光纤光栅光谱特性的温度和应变同时区分测量[J].光谱学与光谱分析,2010,30(3):851-854.
[19]Libish T M,Bobby M C,Linesh J,et al.Nampoori andRadhakrishnan P.Refractive index and temperature de-pendent displacements of resonant peaks of long periodgrating inscribed in hydrogen loaded SMF-28 fiber[J].Optoelectronics Letters,2012,8(2):101-104.
[20]WANG Yan,LIANG Da-kai,ZHOU Bing.Measurement ofsteel corrosion in concrete structures by analyzing long-period fiber grating spectrum character[J].Spectroscopyand Spectral Analysis,2008,28(11):2660-2664.王彦,梁大开,周兵.基于光纤光栅光谱分析的混凝土结构钢筋锈蚀监测[J].光谱学与光谱分析,2008,28(11):2660-2664.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心