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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.22 No.1
- 발행연도
- 2018.1
- 수록면
- 1 - 11 (11page)
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This study presents early crack detection of steel fiber-reinforced concrete (SFRC) under varying temperature and humidity conditions using an instantaneous electrical impedance acquisition system. SFRC has the self-sensing capability of electrical impedance without sensor installation thanks to the conductivity of embedded steel fibers, making it possible to effectively monitor cracks initiated in SFRC. However, the electrical impedance is often sensitively changed by environmental effects such as temperature and humidity variations. Thus, the extraction of only crack-induced feature from the measured impedance responses is a crucial issue for the purpose of structural health monitoring. In this study, the instantaneous electrical impedance acquisition system incorporated with SFRC is developed. Then, temperature, humidity and crack initiation effects on the impedance responses are experimentally investigated. Based on the impedance signal pattern observation, it is turned out that the temperature effect is more predominant than the crack initiation and humidity effects. Various crack steps are generated through bending tests, and the corresponding impedance damage indices are extracted by compensating the dominant temperature effect. The test results reveal that propagated cracks as well as early cracks are successfully detected under temperature and humidity variations.
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참고문헌 (37)
참고문헌 신청
Aggelis, D.G. / 2010 / Combined use of thermography and ultrasound for the characterization of subsurface cracks in concrete / Constr. Build. Mater. 24(10):1888~1897
An, Y.K. / 2014 / Laser lock-in thermography for detection of surface-breaking fatigue cracks on uncoated steel structures / NDT&E Int. 65:54~63
An, Y.K. / 2012 / Integrated impedance and guided wave based damage detection / Mech. Syst. Signal Pr. 28:50~62
An, Y.K. / 2014 / Application of local reference-free damage detection techniques to in-situ bridges / J. Struct. Eng.-ASCE 140(3)
Arslan, M.H. / 2007 / What is to be learned from damage and failure of reinforced concrete structures during recent earthquakes in Turkey? / Eng. Fail. Anal. 14(1):1~22
An, Y.K. / 2014 / Laser lock-in thermography for detection of surface-breaking fatigue cracks on uncoated steel structures / NDT&E Int. 65:54~63
An, Y.K. / 2012 / Integrated impedance and guided wave based damage detection / Mech. Syst. Signal Pr. 28:50~62
An, Y.K. / 2014 / Application of local reference-free damage detection techniques to in-situ bridges / J. Struct. Eng.-ASCE 140(3)
Arslan, M.H. / 2007 / What is to be learned from damage and failure of reinforced concrete structures during recent earthquakes in Turkey? / Eng. Fail. Anal. 14(1):1~22
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