Damage detection for civil infrastructures using electro-mechanical impedance of PZT sensors = PZT센서의 Electro-mechanical impedance를 이용한 토목구조물의 손상검색기법

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dc.contributor.advisorYun, Chung-Bang-
dc.contributor.advisor윤정방-
dc.contributor.authorPark, Seung-Hee-
dc.contributor.author박승희-
dc.date.accessioned2011-12-13T02:40:52Z-
dc.date.available2011-12-13T02:40:52Z-
dc.date.issued2004-
dc.identifier.urihttp://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=238349&flag=dissertation-
dc.identifier.urihttp://hdl.handle.net/10203/31098-
dc.description학위논문(석사) - 한국과학기술원 : 건설및환경공학과, 2004.2, [ v, 62 p. ]-
dc.description.abstractThe objective of this study is to investigate the feasibility of an impedance-based damage detection technique using piezoelectric (PZT) transducers for civil infrastructures such as steel bridges. The basic concept of the technique is to monitor the changes in the electrical impedance to detect structural damages. These changes in the electrical impedance are due to the electromechanical coupling property of piezoelectric materials. The smart PZT transducers which act as both actuators and sensors in a self-analyzing manner are emerging to be effective in non-parametric health monitoring of structural systems. This health monitoring technique can be easily adapted to existing structures, since only a small PZT patch is needed, giving the structure the ability to monitor constantly its own structural integrity. This impedance-based method operates at high frequencies (above 100 kHz), which enables it to detect incipient-type damage. It is not interfered by normal operating conditions, vibrations of the host structure, and changes in the host external body. The results of the experimental study on three kinds of members indicate that cracks or loosened bolts/nuts near the PZT sensors may be effectively detected by monitoring the shifts of the resonant frequencies of the impedance functions.eng
dc.languageeng-
dc.publisher한국과학기술원-
dc.subjectIMPEDANCE-
dc.subjectPZT SENSOR-
dc.subjectDAMAGE DETECTION-
dc.subjectSTRUCTURAL HEALTH MONITORING-
dc.subjectRESONANT FREQUENCY-
dc.subject공진주파수-
dc.subject임피던스-
dc.subject압전센서-
dc.subject토목구조물의 손상검색-
dc.subject구조물의 상시 모니터링-
dc.titleDamage detection for civil infrastructures using electro-mechanical impedance of PZT sensors = PZT센서의 Electro-mechanical impedance를 이용한 토목구조물의 손상검색기법-
dc.typeThesis(Master)-
dc.identifier.CNRN238349/325007 -
dc.description.department한국과학기술원 : 건설및환경공학과, -
dc.identifier.uid020023235-
dc.contributor.localauthorYun, Chung-Bang-
dc.contributor.localauthor윤정방-
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