Smart Structures and Systems

  • 제22권1호
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  • Pages.57-70
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  • 2018
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

PCA-based filtering of temperature effect on impedance monitoring in prestressed tendon anchorage

  • Huynh, Thanh-Canh (Department of Ocean Engineering, Pukyong National University) ;
  • Dang, Ngoc-Loi (Department of Ocean Engineering, Pukyong National University) ;
  • Kim, Jeong-Tae (Department of Ocean Engineering, Pukyong National University)
  • 투고 : 2017.10.16
  • 심사 : 2018.04.28
  • 발행 : 2018.07.25
⟨ 이전 논문 다음 논문 ⟩

초록

For the long-term structural health monitoring of civil structures, the effect of ambient temperature variation has been regarded as one of the critical issues. In this study, a principal component analysis (PCA)-based algorithm is proposed to filter out temperature effects on electromechanical impedance (EMI) monitoring of prestressed tendon anchorages. Firstly, the EMI monitoring via a piezoelectric interface device is described for prestress-loss detection in the tendon anchorage system. Secondly, the PCA-based temperature filtering algorithm tailored to the EMI monitoring of the prestressed tendon anchorage is outlined. The proposed algorithm utilizes the damage-sensitive features obtained from sub-ranges of the EMI data to establish the PCA-based filter model. Finally, the feasibility of the PCA-based algorithm is experimentally evaluated by distinguishing temperature changes from prestress-loss events in a prestressed concrete girder. The accuracy of the prestress-loss detection results is discussed with respect to the EMI features before and after the temperature filtering.

키워드

과제정보

연구 과제 주관 기관 : Ministry of Land, Infrastructure and Transport

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피인용 문헌

  1. Modeling, Simulation, Experimentation, and Compensation of Temperature Effect in Impedance-Based SHM Systems Applied to Steel Pipes vol.19, pp.12, 2019, https://doi.org/10.3390/s19122802
  2. Development of Smart Sensing Technology Approaches in Structural Health Monitoring of Bridge Structures vol.2021, pp.None, 2018, https://doi.org/10.1155/2021/2615029