Damage detection in beam-type structures via PZT

Khac-Duy Nguyen , Duc-Duy Ho , Jeong-Tae Kim

Abstract

In this paper, practical methods to utilize PZT\'s dual piezoelectric effects (i.e., dynamic strain and electro-mechanical (E/M) impedance responses) for damage detection in beam-type structures are presented. In order to achieve the objective, the following approaches are implemented. Firstly, PZT material\'s dual piezoelectric characteristics on dynamic strain and E/M impedance are investigated. Secondly, global vibration-based and local impedance-based methods to detect the occurrence and the location of damage are presented. Finally, the vibration-based and impedance-based damage detection methods using the dual piezoelectric responses are evaluated from experiments on a lab-scaled beam for several damage scenarios. Damage detection results from using PZT sensor are compared with those obtained from using accelerometer and electric strain gauge.

Key Words

PZT\'s dynamic strain; E/M impedance; damage detection; structural health monitoring; beam structures

Address

Khac-Duy Nguyen and Jeong-Tae Kim — Department of Ocean Engineering, Pukyong National University, Busan, Korea
Duc-Duy Ho — Faculty of Civil Engineering, Ho Chi Minh City University of Technology, Vietnam

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