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http://dx.doi.org/10.12989/sss.2016.17.6.881

Compensation of temperature effect on impedance responses of PZT interface for prestress-loss monitoring in PSC girders  

Huynh, Thanh-Canh (Department of Ocean Engineering, Pukyong National University)
Kim, Jeong-Tae (Department of Ocean Engineering, Pukyong National University)
Publication Information
Smart Structures and Systems / v.17, no.6, 2016 , pp. 881-901 More about this Journal
Abstract
In this study, a method to compensate the effect of temperature variation on impedance responses which are used for prestress-loss monitoring in prestressed concrete (PSC) girders is presented. Firstly, an impedance-based technique using a mountable lead-zirconate-titanate (PZT) interface is presented for prestress-loss monitoring in the local tendon-anchorage member. Secondly, a cross-correlation-based algorithm to compensate the effect of temperature variation in the impedance signatures is outlined. Thirdly, lab-scale experiments are performed on a PSC girder instrumented with a mountable PZT interface at the tendon-anchorage. A series of temperature variation and prestress-loss events are simulated for the lab-scale PSC girder. Finally, the feasibility of the proposed method is experimentally verified for prestress-loss monitoring in the PSC girder under temperature-varying conditions and prestress-loss events.
Keywords
impedance monitoring; mountable PZT interface; prestress force monitoring; tendon-anchorage; PSC girders; temperature effect; temperature compensation;
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Times Cited By KSCI : 10  (Citation Analysis)
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