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Open AccessArticle

Debonding Damage Detection in CFRP Plate-Strengthened Steel Beam Using Electromechanical Impedance Technique

1
School of Civil and Architecture Engineering, Xi’an Technological University, Xi’an 710021, China
2
School of Management, Xi’an University of Finance and Economics, Xi’an 710100, China
3
Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
*
Authors to whom correspondence should be addressed.
Sensors 2019, 19(10), 2296; https://doi.org/10.3390/s19102296
Received: 27 April 2019 / Revised: 10 May 2019 / Accepted: 15 May 2019 / Published: 18 May 2019
(This article belongs to the Special Issue Smart Sensors and Smart Structures)
Carbon fiber reinforced polymer materials are widely applied in structure strengthened engineering because of the many advantages of carbon fiber reinforced polymer. However, the debonding damage between the carbon fiber reinforced polymer and host structures occurs frequently, which might lead to the brittle failure of structure components, especially flexural ones. In this paper, an electromechanical impedance-based method, an important technique in structural health monitoring, was adopted to detect the debonding damage of carbon fiber reinforced polymer plate-strengthened steel beam by using lead zirconate titanate (PZT) transducers. A carbon fiber reinforced polymer plate-strengthened steel beam specimen was fabricated in the laboratory and two PZT sensors were attached at different locations on the carbon fiber reinforced polymer plate. The impedance signatures with variation of the different degrees of the debonding damage were measured by an impedance analyzer. The root-mean-square deviation method and the cross-correlation coefficient method were used to quantify the correlation between the electromechanical impedance and the debonding damage degree. The results reflect that an electromechanical impedance-based structural health monitoring technique can serve as a good method to detect the debonding damage of carbon fiber reinforced polymer plate-strengthened steel structures. View Full-Text
Keywords: carbon fiber reinforced polymer; lead zirconate titanate transducer; debonding detection; electromechanical impedance; cross-correlation coefficient carbon fiber reinforced polymer; lead zirconate titanate transducer; debonding detection; electromechanical impedance; cross-correlation coefficient
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MDPI and ACS Style

Wang, B.; Sun, Y.; Li, Y.; Zhang, C. Debonding Damage Detection in CFRP Plate-Strengthened Steel Beam Using Electromechanical Impedance Technique. Sensors 2019, 19, 2296.

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