Debonding and Calibration Shift of Optical Fiber Sensors in Concrete
Publication: Journal of Engineering Mechanics
Volume 126, Issue 3
Abstract
Fiber optic sensors have recently be considered for strain monitoring in concrete structures. The calibration factor of the sensor depends on the strain distribution along the fiber. When an embedded fiber is under strain, debonding may occur, causing the strain distribution and hence the calibration to change. Since interfacial properties that govern debonding are sensitive to environmental conditions, the calibration factor can also change when exposed to various environments. In this paper, a theoretical framework is developed to quantify the effect of environmental conditions on calibration shift. To illustrate the application of the theoretical approach, pullout test results on specimens subjected to various environmental conditions are first analyzed to obtain interfacial parameters. With these parameters, the effects of applied strain, environmental conditions, and fiber length on the calibration factor of two kinds of fiber optic sensors are quantified with the use of a strain transfer model. Based on the results, design guidelines to minimize calibration shift can be identified.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Alavie, A., Maaskant, T. R., and Measures, R. M. (1993). “A multiplexed Bragg grating fiber laser system.” IEEE Photonics Technol. Letters, 5, 1112–1115.
2.
Ansari, F., and Yuan, L. (1998). “Mechanics of bond and interface shear transfer in optical fiber sensors.”J. Engrg. Mech., ASCE, 124(4), 385–394.
3.
Bartos, P. (1980). “Analysis of pull-out tests on fibers embedded in brittle matrices.” J. Mat. Sci., 15, 3122–3128.
4.
Chen, Z., Mendez, A., Li, Q., and Ansari, F. ( 1998). “Fiber optic white light distributed sensor for condition monitoring of civil structures.” Fiber optic sensors for construction materials and bridges, F. Ansari, ed., Technomic, Lancaster, Pa., 129–135.
5.
Habel, W. R., and Hofmann, D. (1994a). “Determination of structural parameters concerning load capacity based on Fibre-Fabry-Perot-Interferometers.” Proc., 2nd Eur. Conf. on Smart Struct. and Mat., European Optical Society, France, 176–179.
6.
Habel, W. R., and Hofmann, D. (1994b). “Strain measurements in reinforced concrete walls during a hydration reaction by means of embedded fibre interferometers.” Proc., 2nd Eur. Conf. on Smart Struct. and Mat., European Optical Society, France, 180–183.
7.
Holst, A., and Habel, W. (1992). “Fiber-optic intensity-modulated sensors for continuous observation of concrete and rock-fill dams.” Proc., 1st Eur. Conf. on Smart Struct. and Mat., European Optical Society, France, 223–226.
8.
Huston, D. R., Fuhr, P., Kajenski, P. J., Ambrose, T. P., and Spillman, W. B. (1992). “Installation and preliminary results from fiber optic sensors embedded in a concrete building.” Proc., 1st Eur. Conf. on Smart Struct. and Mat., European Optical Society, France, 409–412.
9.
Kersey, A. D., and Morey, W. W. (1993). “Multiplexed Bragg grating fiber laser strain sensor system with mode-locked interrogation.” Electronics Letters, 29, 112–116.
10.
Leung, C. K. Y., and Li, V. C. (1991). “A new strength-based theory for the debonding of discontinuous fibers in an elastic matrix.” J. Mat. Sci., 26(11), 5996–6010.
11.
Leung, C. K. Y., and Ybanez, N. (1997). “Pullout of inclined flexible fiber in cementitious composite.”J. Engrg. Mech., ASCE, 123(3), 239–246.
12.
Maaskant, R., Alavie, A. T., and Measures, R. M. ( 1998). “A recent experience in bridge strain monitoring with fiber grating sensors.” Fiber optic sensors for construction materials and bridges, F. Ansari, ed., Technomic, Lancaster, Pa., 129–135.
13.
Meggitt, B. T. ( 1995). “Fiber optic white-light interferometric sensors.” Optical fiber sensor technology, K. T. V. Grattan and B. T. Meggitt, eds., Chapman & Hall, London, 269–312.
14.
Mertz, G. R., Morey, W. W., and Glen, W. H. (1989). “Formation of Bragg gratings in optical fibers by a transverse holographic method.” Optical Letters, 14, 823–825.
15.
Wang, Y. J., Li, V. C., and Backer, S. (1987). “Analysis of Synthetic Fiber Pull-out from a Cement Matrix.” Bonding in Cementitous Compos., Proc., MRS Symp., Vol. 114, S. Mindess and S. P. Shah, eds., Mat. Res. Soc., Pittsburgh, 159–165.
Information & Authors
Information
Published In
History
Received: Aug 18, 1999
Published online: Mar 1, 2000
Published in print: Mar 2000
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.