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Smart PZT-Embedded Sensors for Impedance Monitoring in Prestressed Concrete Anchorage.
Pham, Quang-Quang; Dang, Ngoc-Loi; Kim, Jeong-Tae.
Afiliação
  • Pham QQ; Department of Ocean Engineering, Pukyong National University, Busan 48513, Korea.
  • Dang NL; Department of Ocean Engineering, Pukyong National University, Busan 48513, Korea.
  • Kim JT; Urban Infrastructure Faculty, Mien Tay Construction University, 20B Pho Co Dieu Street, Vinh Long 890000, Vietnam.
Sensors (Basel) ; 21(23)2021 Nov 27.
Article em En | MEDLINE | ID: mdl-34883921
This study investigates the feasibility evaluation of smart PZT-embedded sensors for impedance-based damage monitoring in prestressed concrete (PSC) anchorages. Firstly, the concept of impedance-based damage monitoring for the concrete anchorage is concisely introduced. Secondly, a prototype design of PZT-embedded rebar and aggregate (so-called smart rebar-aggregate) is chosen to sensitively acquire impedance responses-induced local structural damage in anchorage members. Thirdly, an axially loaded concrete cylinder embedded with the smart rebar-aggregate is numerically and experimentally analyzed to investigate their performances of impedance monitoring. Additionally, empirical equations are formulated to represent the relationships between measured impedance signatures and applied compressive stresses. Lastly, an experimental test on a full-scale concrete anchorage embedded with smart rebar-aggregates at various locations is performed to evaluate the feasibility of the proposed method. For a sequence of loading cases, the variation in impedance responses is quantified to evaluate the accuracy of smart rebar-aggregate sensors. The empirical equations formulated based on the axially loaded concrete cylinder are implemented to predict compressive stresses at sensor locations in the PSC anchorage.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Impedância Elétrica Idioma: En Revista: Sensors (Basel) Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Impedância Elétrica Idioma: En Revista: Sensors (Basel) Ano de publicação: 2021 Tipo de documento: Article