Bridge Slab Damage Detection by Signal Processing of UHF-Band Ground Penetrating Radar Data
Tsukasa Mizutani*,†, Nagisa Nakamura*, Takahiro Yamaguchi*, Minoru Tarumi**, Yusuke Ando**, and Ikuo Hara**
*The University of Tokyo, The Department of Civil Engineering, Tokyo, Japan
**The Department of Geophysical Survey, C. E. Management Integrated Laboratory Co. Ltd., Osaka, Japan
Maintenance costs for infrastructure, such as bridges, have been increasing particularly in the developed countries. Bridge slabs are important parts of bridges; however, the evaluation of their structural conditions requires significant manpower and time because dense hammering tests have to be conducted as part of the present inspection methods. To overcome this difficulty, a non-contact inspection technique using a radar is focused in this research. Radar techniques are typically utilized in the fields of mine-search, oil-source search, and geographical archeology. However, these searches are conducted by only visually checking reflected-wave images, and thus, the evaluation strongly depends on the abilities and expertise of the inspectors. To more effectively utilize these radar techniques for evaluating a bridge slab condition, analysis of the reflected wave signals should be made automatic, fast, and objective because the number of bridges to be inspected is large. In this research, to detect the damages on a slab, some signal processing techniques for measuring the reflected wave signal by a UHF-band fast scanning and non-contact radar are proposed, and their validity is shown by applying them to the signals obtained from full-scale bridge slab models in which certain ideal damages are embedded.
-  Kensetsugyou Shinkou Web Magazine, http://www.shinko-web.jp/economic/000673.html [in Japanese, accessed Jan. 6, 2017]
-  Office of the Assistant Secretary and Technology Bureau of Transportation Statistics: National Transportation Statistics Table 1-28: Condition of U.S. Highway Bridges, http://www.rita.dot.gov/bts/sites/rita.dot.gov.bts/files/publications/national_transportation_statistics/html/table_01_28.html [accessed Jan. 6, 2017]
-  K. Maser and W. Roddis, “Principles of Thermography and Radar for Bridge Deck Assessment,” J. of Transportation Engineering, Vol.116, No.5, pp. 583-601, 1990.
-  D. M. McCann and M. C. Forde, “Review of NDT methods in the assessment of concrete and masonry structures,” NDT&E Int., Vol.34, pp. 71-84, 2001.
-  P. Chang and S. Liu, “Recent Research in Nondestructive Evaluation of Civil Infrastructures,” J. of Materials in Civil Engineering, Vol.15, No.3, pp. 298-304, 2003.
-  S. Lee, N. Kalos, and D. H. Shin, “Non-Destructive methods in the U.S. for Bridge Inspection and Maintenance,” KSCE J. of Civil Engineering Vol. 18, No.5, 2014.
-  M. Sansalone and N. J. Carino, “Detecting Delamination in Concrete Slabs with and without Overlays Using the Impact-Echo Method,” ACI Materials J., Vol.86, No.2, pp. 175-184, 1989.
-  D. Huston, J. Q. Hu, K. Maser, W. Weedon, and C. Adam, “GIMA Ground Penetrating Radar System for Monitoring Concrete Bridge Decks,” J. of Applied Geophysics, Vol.43, pp. 139-146, 2000.
-  A. P. Annan, “GPR-History, Trends, Future Development,” Subsurface Sensing Technologies and Applications, Vol.3, No.4, 2002.
-  M. A. H. El Said, “Geophysical Prospection of Underground Water in the Desert by Means of Electromagnetic Interference Fringes,” Pro.I.R.E, Vol.44, pp. 24-30, 1956.
-  L. Peters, J. J. Daniels, and J. D. Young, “Ground Penetrating Radar as a Subsurface Environmental Sensing Tool,” Procs. of IEEE, Vol.82, No.12, pp. 1802-1822, 1994.
-  S. Matsui, “Fatigue strength of RC-slabs of highway bridge by wheel running machine and influence of water on fatigue,” Procs. of JCI, Vol.9, No.2, pp. 627-632, 1987.
This article is published under a Creative Commons Attribution-NoDerivatives 4.0 Internationa License.