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콘크리트 구조물의 지표면 결함 검출을 위한 Pulsed Phase Thermography의 정량적 접근
트란쾅휘 ( Tran Quang Huy ),강충현 ( Kang Choongh ),한동엽 ( Dongyeob ),누엔반박 ( Nguyen Van Bac ),허정원 ( Huh Jungwon ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
In this study, an experimental study of Impulse Thermography was carried out on a concrete specimen with in-placed artificial defects at different depths and dimensions. Then, all the data were processed by Pulse Phase Thermography technique by performing Fast Fourier Transformation. The results were compared with the absolute contrast method.
콘크리트 검사에서 Pulsed Thermography와 Pulse Phase Thermography의 비교
트란쾅휘 ( Tran Quang Huy ),강충현 ( Kang Choong Hyun ),막반하 ( Mac Van Ha ),한동엽 ( Han Dong Yeob ),허정원 ( Huh Jung Won ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.2
This study aims to investigate the qualitative and quantitative performance of concrete defect using Pulsed Thermography (PT) and Pulse Phase Thermography (PPT) techniques. The experimental study was carried out on a concrete specimen in-placed artificial defects with various depths and sizes. The signal-to-noise technique was used to compare the contrast between the two methods. The results showed that the thermal images obtained from PPT show clearer than those from PT (using contrast-based method).
다양한 주변 온도에서의 펄스 스퀘어 서모그래피를 이용한 콘크리트 비파괴 검사
트란쾅휘 ( Tran Quang Huy ),강충현 ( Kang Choonghyun ),허정원 ( Huh Jungwon ),한동엽 ( Han Dongyeob ),고광일 ( Koh Kwang-il ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.1
This research aim to investigate the qualitative and quantitative performance of concrete deteriorations using Pulse Square Thermography (PST) technique. An experimental test of ten cases was conducted on a concrete slab specimen under different meteorological conditions. The results showed that the absolute contrast between defective area and sound area decreases with the falling of ambient temperature. Besides, the delamination with identical size but placed at a deeper position indicates lower absolute contrast than the shallow delamination.
철근콘크리트 구조물의 검사를 위한 능동 적외선 열 화상 장치
트란쾅휘 ( Tran Quang Huy ),강충현 ( Kang Choonghyun ),한동엽 ( Han Dong Yeob ),허정원 ( Huh Jungwon ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.2
The purpose of this research is to consider the qualitative and quantitative performance of reinforced concrete deteriorations using active infrared thermography (IRT) technique. An experiment of five different cases of environmental conditions was conducted on a concrete slab in laboratory. A comparison of the IRT results between normal and reinforced concrete is also discussed. The results showed that the absolute contrast between defective area and non-defective area increases with the increment of ambient temperature. Besides, the values of absolute contrast above delamination obtained from normal concrete showed high than those under effect of reinforcing steel bar.
누엔반박 ( Nguyen Van Bac ),트란쾅휘 ( Tran Quang Huy ),강충현 ( Kang Choonghyun ),김종우 ( Kim Jong Woo ),허정원 ( Huh Jungwon ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.2
Uplift phenomenon of container cranes occurred during the past earthquakes. Therefore, the evaluation of the potential uplift of the container cranes is an important task when the demand for trade is increasing. The objective of this study is to investigate the probability of the uplift occurrence of the container crane subjected to a wide range of earthquake intensity. The uplift results are then fitted to the log-normal cumulative distribution function (CDF).
수동 열화상에 의한 콘크리트 구조물에서 다른 크기를 갖는 얕은 박리의 검출
막반하 ( Mac Van Ha ),허정원 ( Huh Jungwon ),트란쾅휘 ( Tran Quang Huy ),강충현 ( Kang Choong Hyun ),이종인 ( Lee Jong-in ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.2
In this study, an experimental test is conducted on a concrete specimen using passive thermography (IRT) which is an effective and modern non-destructive test (NDT) method in detecting delaminations. The present work evaluates the detectability of delaminations with different sizes during the daytime by the absolute contrast technique. In addition, the most suitable time for delamination inspection of concrete structures is also proposed.