18 April 2012 Improvement method for impedance-based nondestructive evaluation on concrete structures using a piezoceramic material
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Abstract
In this study, a relatively new non-destructive evaluation technique known as electro-mechanical impedance (EMI) method has been investigated on concrete structures with large surface area. Although various studies have been conducted on concrete components, a major issue still exists as when using EMI method, damage detection can be very difficult. Due to the property of concrete, only a minor variation in the impedance signature is noticed subjected to damage. Such small change can be hard for one to verify whether the host structure is damaged or not. Since other factors can also change the impedance signature including, temperature changes, humidity and aging of the piezo material, this can increase the uncertainties when differentiating an intact case from a damaged case. In this study, the effect of a technique to enhance the damage detection ability of EMI method is evaluated on concrete structures with the aforementioned problem.
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S. Na, S. Na, H. K. Lee, H. K. Lee, } "Improvement method for impedance-based nondestructive evaluation on concrete structures using a piezoceramic material", Proc. SPIE 8348, Health Monitoring of Structural and Biological Systems 2012, 83480A (18 April 2012); doi: 10.1117/12.915697; https://doi.org/10.1117/12.915697
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