Experimental Mechanics

, Volume 46, Issue 5, pp 609–618 | Cite as

Multiple Crack Detection of Concrete Structures Using Impedance-based Structural Health Monitoring Techniques



This paper presents a feasibility study for practical applications of an impedance-based real-time health monitoring technique applying PZT (Lead–Zirconate–Titanate) patches to concrete structures. First, comparison between experimental and analytical studies for damage detection on a plain concrete beam is made. In the experimental study, progressive surface damage inflicted artificially on the plain concrete beam is assessed by using both lateral and thickness modes of the PZT patches. Then, an analytical study based on finite element (FE) models is carried out to verify the validity of the experimental result. Secondly, multiple (shear and flexural) cracks incurred in a reinforced concrete (RC) beam under a third point bending test are monitored continuously by using a sensor array system composed of the PZT patches. In this study, a root mean square deviation (RMSD) in the impedance signatures of the PZT patches is used as a damage indicator.


Impedance PZT Structural health monitoring Multiple crack detection Finite element analysis Concrete structures 


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Copyright information

© Society for Experimental Mechanics 2006

Authors and Affiliations

  1. 1.Department of Civil and Environmental EngineeringKorea Advanced Institute of Science and TechnologyDaejeonSouth Korea
  2. 2.School of Mechanical EngineeringKyungpook National UniversityDaeguSouth Korea

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