Rebar Local Corrosion Monitoring of RC Structures Based on Fractal Characteristics of Piezoelectric Guided Waves
Publication: Earth and Space 2021
ABSTRACT
In offshore reinforced concrete (RC) structures, the phenomenon of rebar corrosion is widespread, and how to monitor the early production and development of the rebar corrosion is of great significance. However, the rebar corrosion in RC structures is localized and develops along the interface, which brings great challenges to the evaluation of rebar corrosion level (especially in corrosion areas). In this paper, theoretical analysis, numerical calculation, and experiment validation are used to study the rebar local corrosion monitoring and evaluation of RC structures with piezoelectric ultrasonic guided waves (UGWs). For this purpose, a reasonable selection of piezoelectric guided wave excitation and reception method and corresponding setup is studied. Frequency dispersion curves of the selected guided waves under different corrosion conditions are obtained by analyzing the wave dispersion and multimodal characteristics. Based on echo signal energy values and their fractal dimension characteristic values for different corrosion levels, an evaluation index of rebar corrosion is proposed, and a corresponding evaluation equation is established. The effectiveness of the proposed algorithm is verified by a rebar corrosion monitoring test with the accelerated corrosion test and guided wave technology. A fitting relationship between the corrosion level (length and thickness) and the basic characteristics of the sensing signal is established. A corrosion evaluation method is established based on the corrosion index. The results show that the rebar corrosion has a certain effect on the energy and fractal characteristics of longitudinal guided waves. The larger corrosion length and the thicker corrosion layer result in the smaller energy value of echo signal, smaller fractal characteristic value, and the larger corrosion index value.
Get full access to this article
View all available purchase options and get full access to this chapter.
REFERENCES
Chree, C. (1886). “Longitudinal vibrations of a circular bar.” Quarterly Journal of Mathematics, 21(83), 287-295.
Cooper, R. M., and Naghdi, P. M. (1957). “Propagation of nonaxially symmetric waves in elastic Cylindrical shells.” the Acoustical Society of America, 29, 1365-1373.
Chen, J. A. (1999). “Definition and measurement of fractal dimension.” Electronic Science and Technology, 4, 44-46. (in Chinese).
Cao, M., Ren, Q., and Qiao, P. (2006). “Nondestructive assessment of reinforced concrete structures based on fractal damage characteristic factors.” Journal of Engineering Mechanics, 132(9), 924-931.
Ghosh, J. (1923). “Longitudinal mathematical society. vibrations of a hollow cylinder.” Bulletin of the Calcutta, 24 (14), 32-40.
Gazis, D. C. (1958). “Exact analysis of the plane- strain vibrations of thick-walled hollow cylinders.” the Acoustical Society of America, 30(8), 786-794.
Hadjileontiadis, L. J., and Douka, E. (2007). “Crack detection in plates using fractal dimension.” Engineering Structures, 29 (7), 1612-1625.
Lamb, H. (1917). “On waves in an elastic plate.” Proceedings of the Royal Society, 93(468)114-128.
Liang, M. T., and Su, P J. (2001). “Detection of the corrosion damage of rebar in concrete using impact-echo method.” Cement and Concrete Research, 2001, 31, 1427-1436.
Li, H., Huang, X., Ou, J., et al. (2011). “Fractal dimension-based damage detection method for beams with a uniform cross-section.” Computer-Aided Civil and Infrastructure Engineering, 26(3), 190-206.
Love, A. E. H. (1994). “A treatise on the mathematical theory of elasticity.” New York: Dover Publications. Journal of Nature, 9(1), 1385.
Lowe, M. J. S. (1995). “Matrix techniques for modeling ultrasonic waves in multilayered media.” IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control, 42(4), 525-542.
Luo, G., and Shi, Y. K. (2002). “Non-destructive testing method of steel corrosion in reinforced concrete components.” Fujian Architecture & Construction, 4: 55-57. (in Chinese).
Metha, P. K. (1991). “Concrete durability: Fifty year's progress.” Durability of Concrete 2nd international Conference. ACISPI26-1, 1-33.
Miller, T. H., Kundu, T., Huang, J. Q., and Grill, J. Y. (2012). “A new guided wave-based technique for corrosion monitoring in reinforced concrete.” Journal of Structural Health Monitoring, 12(1), 35-47.
Mitra, M., and Gopalakrishnan, S. (2016). “Guided wave based structural health monitoring: A review.” Smart Materials and Structures, 25(5), 053001.
Shannon, C. E., Weaver, W., and Wiener, N. (1949). The mathematical theory of communication. Urbana: University of Illinois Press.
Silk, M. G., and Bainton, K. P. (1979). “Propagation in metal tubing of ultrasonic wave modes equivalent to Lamb waves.” Ultrasonics, 17(1), 11-19.
Zhang, J. Z. (1995). Fractal. Beijing: Tsinghua University Press. (in Chinese).
Zheng, Z. P., and Lei, Y. (2014). “Effects of concrete on propagation characteristics of guided wave in steel bar embedded in concrete.” Shock and Vibration, 2014, 1-14.
Zheng, Z. P., Lei, Y., and Xue, X. (2014). “Numerical simulation of monitoring corrosion in reinforced concrete based on ultrasonic guided waves.” The Scientific World Journal, 2014, 1-9.
Information & Authors
Information
Published In
Copyright
© 2021 American Society of Civil Engineers.
History
Published online: Apr 15, 2021
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.