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Title |
Application of Acoustic Emission Technique for Bridge Cable Monitoring
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Authors |
김가영(Ga-Young Kim) ; 서동우(Dong-Woo Seo) |
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DOI |
https://doi.org/10.11112/jksmi.2018.22.4.121 |
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Keywords |
강연선 ; 모니터링 ; 음향방출 ; 사장교 7-wire strand ; Monitoring ; Acoustic emission ; Cable stayed bridge |
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Abstract |
This paper presents the assessment of 7-wire strand monitoring using acoustic emission technique for bridges. 7-wire strand is widely used construction materials to provide additional tensile force to bridges. PSC (PreStressed Concrete) bridge and cable-stayed bridge are representatives for such cases. However, as the bridge aging progresses recently, corrosion problems of strand are emerging. For this reason, various NDT (Non-Destructive Test) methods for cable inspection are being studied and applied to the field. One of the NDT methods, acoustic emission technique, is known as an effective technique to detect cable damage and breakage. In this study, to evaluate the applicability of acoustic emission technique to bridges, acoustic emission signals according to damage of the strand were acquired and analyzed by tensile test. Moreover, The optimal AE sensor type was selected for field application. As a result, it is considered that the acoustic emission technique will be able to detect corrosion breakage and signs of rupture.
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