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Smart Structures and Systems
  Volume 15, Number 2, February 2015 , pages 375-393

Local dynamic characteristics of PZT impedance interface on tendon anchorage under prestress force variation
Thanh-Canh Huynh, Kwang-Suk Lee and Jeong-Tae Kim

    In this study, local dynamic characteristics of mountable PZT interfaces are numerically analyzed to verify their feasibility on impedance monitoring of the prestress-loss in tendon anchorage subsystems. Firstly, a prestressed tendon-anchorage system with mountable PZT interfaces is described. Two types of mountable interfaces which are different in geometric and boundary conditions are designed for impedance monitoring in the tendon-anchorage subsystems. Secondly, laboratory experiments are performed to evaluate the impedance monitoring via the two mountable PZT interfaces placed on the tendon-anchorage under the variation of prestress forces. Impedance features such as frequency-shifts and root-mean-square-deviations are quantified for the two PZT interfaces. Finally, local dynamic characteristics of the two PZT interfaces are numerically analyzed to verify their performances on impedance monitoring at the tendon-anchorage system. For the two PZT interfaces, the relationships between structural parameters and local vibration responses are examined by modal sensitivity analyses.
Key Words
    local dynamic; PZT interface; tendon anchorage; prestress force; impedance signature; modal analysis; modal sensitivity
Thanh-Canh Huynh, Kwang-Suk Lee and Jeong-Tae Kim: Department of Ocean Engineering, Pukyong National University, 599-1 Daeyeon 3-dong, Nam-gu, Busan 608-737, Republic of Korea

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