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허춘근(Hur Choon Kun),권혁기(Kwon Hyek Kee),김종호(Kim Jong Ho) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
The purpose of this study IS to suggest some references of maintenance and stability of Intake towers by analyzing dynamic characteristics In x, y, z directions when earthquakes occur. We consider general symmetrical and unsymmetrical Intake towers of an Irrigation dam for comparing a hydrodynamic pressure and eigenvalues Hydrodynamic pressure gives more Influence to the unsymmetrical Intake tower of an irrigation dam on the normal water level and dead storage level better than the unsymmetrical Intake tower of an irrigation darn, Also. the eigenvalues character of Intake towers is showed a spectrum gravity on Standard Design Response Spectrum is located on the peak value by a frequency
허춘근 ( Hur Choon Kun ),권혁기 ( Kwon Hyek Kee ),김종호 ( Kim Jong Ho ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.2
The purpose of this study is to suggest some references of maintenance and stability of intake towers by analyzing dynamic characteristics in x,y, z directions when earthquakes occur. We consider general symmetrical and unsymmetrical intake towers of an irrigation dam for comparing a hydrodynamic pressure and eigenvalues. Hydrodynamic pressure gives more influence to the unsymmetrical intake tower of an irrigation dam on the normal water level and dead storage level better than the symmetrical intake tower of an irrigation dam. Also, the eigenvalues character of intake towers is showed a spectrum gravity on Standard Design Response Spectrum is located on the peak value by a frequency.
차철준 ( Cha Chul-joon ),김보헌 ( Kim Bho-hun ),박노영 ( Park No-young ),허춘근 ( Hur Choon-kun ) 한국구조물진단유지관리공학회 2011 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.15 No.1
In this study, the vibration reduction method of steel box bridge is suggested. In order to perform this goal, a sample steel box bridge is investigated, The bridge which is designed for viaduct structure is loaded by heavy-weight vehicles. According to the diagnosis results, thers's no safety problem but there is a serviceability problem. To keep the bridge serviceable, we suggest proper repair and rehabilitation after looking for the fundamental causes of the vibration.
광학장비를 활용한 실 교량 정ㆍ동적처짐 계측기법의 적용성 평가
이흥수 ( Lee Heung Soo ),박재욱 ( Park Jae Wook ),허춘근 ( Hur Choon Kun ),오홍섭 ( Oh Hong Seob ),정수형 ( Jung Soo Hyung ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
In this study, the static and dynamic displacement responses due to vehicle loadings were measured by Video Gauge System(VGS) technique. The displacement response data were compared with data obtained from laser displacement sensors(PSM)&electronic distance measurement device(EDM) so that the static and dynamic behavior of the bridge under vehicle loadings was examined. The static and dynamic loading test for an earth-anchored suspension bridge, Nam-hae Bridge&Gwang-an Bridge, was performed using vehicles. The accuracy of the deflection measurement using the VGS in the load of the actual bridge was verified.
차철준(Cha, Chul-Joon),김보헌(Kim, Bho-Hun),박노영(Park, No-Young),허춘근(Hur, Choon-Kun) 한국구조물진단유지관리학회 2011 한국구조물진단학회 학술발표회논문집 Vol.15 No.1
In this study, the vibration reduction method of steel box bridge is suggested. In order to perform this goal, a sample steel box bridge is investigated, The bridge which is designed for viaduct structure is loaded by heavy-weight vehicles. According to the diagnosis results, thers’s no safety problem but there is a serviceability problem. To keep the bridge serviceable, we suggest proper repair and rehabilitation after looking for the fundamental causes of the vibration.
조효남 ( Cho Hyo-nam ),이성칠 ( Yi Sung-chil ),허춘근 ( Hur Choon-kun ) 한국구조물진단유지관리공학회 2001 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.5 No.2
This paper presents an efficient algorithm for the estimation of damage location and severity in structure using Probabilistic Neural Network (PNN). Artificial neural network has been being used for damage assessment by many researchers, but there are still some barriers that must be overcome to improve its accuracy and efficiency. The major problems with the conventional neural network are the necessity of many training data for neural network learning and ambiguity in the relation of neural network structure to the convergence of solution. In this paper, PNN is used as a pattern classifier to overcome those problems in the conventional neural network. The basic idea of damage assessment algorithm proposed in this paper is that modal characteristics from a damaged structure are compared with the training patterns which represent the damage in specific element to determine how close it is to training patterns in terms of the probability from PNN. The training pattern that gives a maximum probability implies that the element used in producing the training pattern is considered as a damaged one. The proposed damage assessment algorithm using PNN is applied to a Cable Stayed Bridge to verify the algorithm.