Investigation of piezoelectric impedance-based health monitoring of structure interface debonding

Xiao, Li; Chen, Guofeng; Chen, Xiaoming; Qu, Wenzhong

doi:10.1117/12.2219274

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…In geotechnical engineering, different types of application, such as soil strength (Zhang et al, 2020a), load-induced damage of rocks (Yang et al, 2007(Yang et al, , 2008, soil compactness (Wu et al, 2020), interlayer slide (Wu et al, 2018a) can be effectively detected by the technique. In civil engineering field, the technique was more widely applied, for example, the strength development monitoring of concrete (Lu et al, 2020;Negi et al, 2018;Tawie and Lee, 2010), rebar corrosion assessment (Li et al, 2019b;Talakokula et al, 2014), grout compactness measurement (Shi et al, 2018), interfacial debonding detection (Li et al, 2018;Xiao et al, 2016), etc.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of drying-induced soil moisture loss with PZT-based EMI technique

Fang

Wang

et al. 2022

Journal of Intelligent Material Systems and Structures

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Air-drying process of soil is a crucial procedure in geological and geotechnical engineering. Drying-induced ground subsidence and damage to overlying buildings is a widespread and urgent problem. Monitoring of drying-induced water evaporation in soil is of great importance. In this paper, soil moisture loss monitoring based on lead zirconate titanate (PZT) transducer using electro-mechanical impedance (EMI) technique was investigated. A physical model test in our laboratory was conducted to study the feasibility and applicability. In the experimental research, three identical PZT transducers that were wrapped with waterproof insulation glue were pre-embedded inside a cohesive soil specimen. In addition, another PZT transducer was embedded in a sandy soil specimen to explore the application effect in soil with different composition. EMI signatures of these four PZT patches during the air-drying process were collected and analyzed. Experimental results indicated that the peak frequency in the conductance signatures presented a rightward shift as the water evaporates. Moreover, the corresponding peak magnitude keep decreasing with the continuous development of soil moisture loss. To better quantify the variations, two statistical metrics including root mean square deviation (RMSD) and mean absolute percentage deviation (MAPD) were employed to study the changing characteristics of the EMI signatures. All these two metrics increase coincidentally in the process. Experimental results demonstrate that cohesive and sandy soil moisture loss monitoring by using the embedded PZT transducer is feasible and reliable. This work also serves as a proof-of-concept study to demonstrate the performance of the EMI technique in monitoring the soil moisture content.

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