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Smart Structures and Systems Volume 15, Number 4, April 2015 , pages 1159-1175 DOI: https://doi.org/10.12989/sss.2015.15.4.1159 |
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Temperature effect on wireless impedance monitoring in tendon anchorage of prestressed concrete girder |
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Jae-Hyung Park, Thanh-Canh Huynh and Jeong-Tae Kim
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| Abstract | ||
| In this study, the effect of temperature variation on the wireless impedance monitoring is analyzed for the tendon-anchorage connection of the prestressed concrete girder. Firstly, three impedance features, which are peak frequency, root mean square deviation (RMSD) index, and correlation coefficient (CC) index, are selected to estimate the effects of temperature variation and prestress-loss on impedance signatures. Secondly, wireless impedance tests are performed on the tendon-anchorage connection for which a series of temperature variation and prestress-loss events are simulated. Thirdly, the effect of temperature variation on impedance signatures measured from the tendon-anchorage connection is estimated by the three impedance features. Finally, the effect of prestress-loss on impedance signatures is also estimated by the three impedance features. The relative effects of temperature variation and prestress-loss are comparatively examined. | ||
| Key Words | ||
| temperature effect; wireless monitoring; electro-mechanical impedance; impedance-based; prestress-loss; tendon-anchorage connection; prestressed concrete girder | ||
| Address | ||
| Jae-Hyung Park, Thanh-Canh Huynh and Jeong-Tae Kim: Department of Ocean Engineering, Pukyong National University, 599-1 Daeyeon 3-dong, Nam-gu, Busan 608-737, Republic of Korea | ||