|
|
CORROSION MONITORING OF CONCRETE STRUCTURES BY OPTICAL FIBER GRATING |
LI Jun; WU Jin; GAO Junqi |
Civil Department; Nanjing University of Aeronautics and Astronautics; Nanjing 210016 |
|
|
Abstract A new type of optical fiber grating sensor for monitoring corrosion of reinforcement steel was presented--optical fiber grating corrosion sensor with two steel bars. In the sensor, Bragg grating is stick on the top surface of two bars against each other, for which the principle is that the steel volume will be expanded due to corrosion. The monitoring will be carried out by transforming the volume increase to the fiber strain. While Bragg gratings is tensioned, the reflected spectrum will have a single distinct peak shift in center wavelength, as a result the loss and rate of steel corrosion can be obtained. By the designed sensor, corrosion is recorded with the shift in center wavelength through the fiber, and the degree of corrosion of reinforcement steel will be measured indirectly, which is not affected by corrosion factors. Therefore the sensor proposed in the paper could be used in the early corrosion monitoring of reinforcement steel in concrete structures.
|
Received: 21 June 2007
|
ZTFLH: |
TP212
|
|
|
TG174.3
|
|
|
TU375
|
|
|
Corresponding Authors:
LI Jun
E-mail: Lij\_nh@nuaa.edu.cn
|
[1] Wu J H,Zhao Y T. Corrosion monitoring/detecting of rebar in concrete[J]. Corros. Prot.,2003,24(10):421-431
(吴建华,赵永韬. 钢筋混凝土的腐蚀监测/监测[J]. 腐蚀与防护,2003(10):421-431)
[2] Andrade, C, Gonzazlez J A. Quantitative measurements of corrosion rate of reinforcing steel embedded in concrete using polarization resistance measurements[J],Workstuff Corros., 1978, 29:515-519
[3] Millard S G, Law D. Environmental influences on linear polarisation corosion rate measurement in reinforced concrete[J], NDT & E Int., 2001, 34:409-417
[4] Zhang J K, Gong J Q, Yue Q R, et al. Application for inspecting technology of fiber Bragg grating in civil engineering structure[J].J. Northern Jiaotong Univ., 2003, 27(5):94-97
(张家坤,弓俊青,岳清瑞等. 光纤光栅传感技术在土木工程结构监测中的应用[J].北方交通大学学报,2003,27(5):94-97)
[5] Jiang D S, Chen D X, Liang L. Study on application of FBG sensor for structure reinforcement monitoring[J]. Chin. Civil Eng. J., 2004, 37(5):50-53
(姜德生,陈大雄,梁磊. 光纤光栅传感器在建筑结构加固检测中的应用研究[J]. 土木工程学报,2004,37(5):50-53)
[6] Jones M E,Greene J A. Optical fiber grating-based strain and corrosion sensor[J]. SPIE,1996,2948:94-100
[7] Greene J A,Jones M E,Duncan P G. Grating-based optical fiber corrosion sensor[J]. SPIE,1997,3042:260-266
[8] Greene J A,Jones M E,Tran T A,et al. Grating-based optical fiber-based corrosion sensor[J]. SPIE,1996,2718:170-174
[9] Vikram B,David C,Marten J,et al.Grating-based optical fiber sensors for structural analysis[J]. SPIE,1997,3042:390-399
[10] Jiang Y,Yan Y,Christopher K Y L. Optical fiber grating corrosion sensors[J]. Acta Photonica Sin.,2006,35(1):96-99
(江毅,严云, Christopher K Y L.光纤光栅腐蚀传感器[J]. 光子学报,2006,35(1):96-99) |
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|