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Smart Structures and Systems Volume 15, Number 2, February 2015 , pages 375-393 DOI: https://doi.org/10.12989/sss.2015.15.2.375 |
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Local dynamic characteristics of PZT impedance interface on tendon anchorage under prestress force variation |
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Thanh-Canh Huynh, Kwang-Suk Lee and Jeong-Tae Kim
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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. | ||
| Key Words | ||
| local dynamic; PZT interface; tendon anchorage; prestress force; impedance signature; modal analysis; modal sensitivity | ||
| Address | ||
| 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 | ||