Smart Structures and Systems

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Local dynamic characteristics of PZT impedance interface on tendon anchorage under prestress force variation

  • Huynh, Thanh-Canh (Department of Ocean Engineering, Pukyong National University) ;
  • Lee, Kwang-Suk (Department of Ocean Engineering, Pukyong National University) ;
  • Kim, Jeong-Tae (Department of Ocean Engineering, Pukyong National University)
  • Received : 2014.11.30
  • Accepted : 2015.01.16
  • Published : 2015.02.25
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Abstract

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.

Keywords

Acknowledgement

Supported by : Ministry of Land, Transportation and Maritime Affairs (MLTM)

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