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조충재(Cho Choong-Jae),김이성(Kim Ie-Sung),김화중(Kim Wha-Jung) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.1
The voltage change of piezoelectric for the steel girder is used for damage prediction. The inspection and monitoring for safety of crane is not easy because it is located in high level and the operation should be stop for the inspection. The constant input Dynamic effect by moving the crane girder with constant speed was used instead of ambient vibration. In this study, wireless monitoring system using LAN is tried for the long distance measurement. The objective of this paper is to present the dynamic measurement results to identify the potential damage of steel beam using piezoelectric sensor. FFT method was used for the damage identification and RMS used by other measuring methods.
조충재 ( Cho Choong-jae ),김이성 ( Kim Ie-sung ),김화중 ( Kim Wha-jung ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.1
The voltage change of piezoelectric for the steel girder is used for damage prediction. The inspection and monitoring for safety of crane is not easy because it is located in high level and the operation should be stop for the inspection. The constant input Dynamic effect by moving the crane girder with constant speed was used instead of ambient vibration. In this study, wireless monitoring system using LAN is tried for the long distance measurement. The objective of this paper is to present the dynamic measurement results to identify the potential damage of steel beam using piezoelectric sensor. FFT method was used for the damage identification and RMS used by other measuring methods.
PZT를 이용한 RC부재 내부의 단층촬영기술에 관한 연구
김화중(Kim Wha-Jung),김홍진(Kim Hong-Jin),김대민(Kim Dae-Min),조충재(Cho Choong-Jae) 한국구조물진단유지관리학회 2007 한국구조물진단학회 학술발표회논문집 Vol.11 No.1
The increasing usage of high strength concrete has issued the need of paying special attention on the maintainability and safety involved in RC member. Non-Destructive Testing(NDT) method is simple to use, effective and reliable for periodical investigation of RC structure. This paper presents the PZT-based tomography method to estimate the velocity distribution in RC members. The velocity estimation is performed using Impact-Echo method and its results are compared with traditional tomography method. Experiment and analysis results indicate that PZT-based tomography method estimates the strength distribution of RC members quite accurately.
PZT를 이용한 RC부재 내부의 단층촬영기술에 관한 연구
김화중 ( Kim Wha-jung ),김홍진 ( Kim Hong-jin ),김대민 ( Kim Dae-min ),조충재 ( Cho Choong-jae ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.1
The increasing usage of high strength concrete has issued the need of paying special attention on the maintainability and safety involved in RC member. Non-Destructive Testing (NDT) method is simple to use, effective and reliable for periodical investigation of RC structure. This paper presents the PZT-based tomography method to estimate the velocity distribution in RC members. The velocity estimation is performed using Impact-Echo method and its results are compared with traditional tomography method. Experiment and analysis results indicate that PZT-based tomography method estimates the strength distribution of RC members quite accurately.