Article Article
A Novel Method for the Remote Detection of Debonding in FRP-Strengthened Concrete: Acoustic-Laser Vibrometry

Fiber-reinforced polymer (FRP) strengthening and retrofitting of concrete structural elements in civil infrastructure systems has become increasingly popular since the 1990s, especially in areas where earthquakes are prevalent [1,2]. When defects such as voids or delamination occur in these FRP-reinforced concrete elements at the FRP-concrete interface, the FRP obscures the defect such that visual detection may not be possible. Detection of such defects is especially important in the case where FRP has been retrofitted to previously damaged structures and further damage is a distinct possibility.

1. Meier, U., “Strengthening of Structures Using Carbon Fibre/epoxy Composites,” Construction and Building Materials, Vol. 9, No. 6. 1995, pp. 341-351. 2. Saadatmanesh, H. and M.R. Ehsani, “RC Beams Strengthened with FRP Plates. I: Experimental Study,” Journal of Structural Engineering, Vol. 117, No. 11, 1991, pp. 3417-3433. 3. Buyukozturk, O., “Imaging of Concrete Structures,” NDT&E International, Vol. 31, No. 4, 1998, pp. 233-243. 4. Yu, T.-Y. and O. Buyukozturk, “A Far-field Airborne Radar NDT Technique for Debonding and Rebar Detection in GFRP-retrofitted Concrete Structures,” NDT&E International, Vol. 41, 2008, pp. 10-24. 5. Kachelmyer A.L. and K.I. Schultz, “Laser Vibration Sensing,” Lincoln Laboratory Journal, Vol. 8, No. 1, 1995, pp. 3-28. 6. Chen, F. and D. McKillip, “Measurement and Analysis of Vibration and Deformation Using Laser Metrology for Automotive Applications,” Proc. IMechE, Part D: J. Automobile Eng., Vol. 221, 2007, pp. 725-738. 7. Santulli, C. and G. Jeronimidis, “Development of a Method for Nondestructive Testing of Fruits Using Scanning Laser Vibrometry (SLV),”, Sep 2006, Vol. 11, No. 10. 8. Haupt R. and K.D. Rolt, “Stand-off Acoustic-laser Technique to Locate Buried Landmines,” Lincoln Laboratory Journal, Vol. 15, No. 1, 2004, pp. 3-22. 9. Aranchuk, V., A. Lal, C. Hess and J.M. Sabatier, “Multi-beam Laser Doppler Vibrometer for Landmine Detection,” Optical Engineering, Vol. 45, 104302. 10. Beyer, S., D. Gornicki and G. Muller, “Analysis of Laser-induced Vibrations to Detect Non-adhesive Regions of Coatings,” Applied Physics A, Vol. 79, 2004, pp. 1501-1504. 11. Ghoshal, A., A. Chattopadhyay, M.J. Schulz, R. Thornburgh and K. Waldron, “Experimental Investigation of Damage Detection in Composite Material Structures Using a Laser Vibrometer and Piezoelectric Actuators,” Journal of Intelligent Material Systems and Structures, Vol. 14, 2003, pp. 521-537. 12. Staszewski, W.J., B.C. Lee, L. Mallet and F. Scarpa, “Structural Health Monitoring Using Scanning Laser Vibrometry: I. Lamb Wave Sensing,” Smart Materials and Structures, Vol. 13, 2004, pp. 251-260. 13. Leissa, A.W., Vibration of Plates, SP-160, NASA, US Government Printing Office, Washington, DC, 1969. 14. Soedel, W., Vibrations of Shells and Plates, third edition, Marcel Dekker, New York, 2004. 15. Fawcett, T., “An Introduction to ROC Analysis,” Pattern Recognition Letters, Vol. 27, Iss. 8, 2006, pp. 861-874. 16. Emge, T.J., Remote Nondestructive Evaluation of Composite-Steel Interface by Acoustic Laser Vibrometry, M.S. Thesis, Massachusetts Institute of Technology, Cambridge, MA, 2012
Usage Shares
Total Views
47 Page Views
Total Shares
0 Tweets
0 PDF Downloads
0 Facebook Shares
Total Usage