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Structural Monitoring and Maintenance
  Volume 9, Number 2, June 2022 , pages 129-155

Material and geometric properties of hoop-type PZT interface for damage-sensitive impedance responses in prestressed tendon anchorage
Ngoc-Loi Dang, Quang-Quang Pham and Jeong-Tae Kim

    In this study, parametric analyses on a hoop-type PZT (lead-zirconate-titanate) interface are performed to estimate the effects of the PZT interface's materials and geometries on sensitivities of impedance responses under strand breakage. The paper provides a guideline for installing the PZT interface suitable in tendon anchorages for damage-sensitive impedance signatures. Firstly, the concept of the PZT interface-based impedance monitoring technique in prestressed tendon anchorage is briefly described. A FE (finite element) analysis is conducted on a multistrands anchorage equipped with a hoop-type PZT interface for analyzing materials and geometric effects. Various material properties, geometric sizes of the interface, and PZT sensor are simulated under two states of prestressing force for acquiring impedance responses. Changes in impedance signals are statistically quantified to analyze the effect of these factors on damage-sensitive impedance monitoring in the tendon anchorage. Finally, experimental analyses are performed to demonstrate the effects of materials and geometrical properties of the PZT interface on damage-sensitive impedance monitoring.
Key Words
    damage-sensitive; impedance responses; material and geometric properties; prestressed tendon anchorage; PZT interface
Ngoc-Loi Dang: Urban Infrastructure Faculty, Mien Tay Construction University, Vinh Long 890000, Vietnam
Quang-Quang Pham, Jeong-Tae Kim: Department of Ocean Engineering, Pukyong National University, Nam-gu, Busan 48513, Korea

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