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가스공급시설의 안전점검 · 진단 시스템구축에 관한 연구
오광진(Oh, Kwang-Chin),최재곤(Choi, Jae Goun),강철(Kang, Cheol),최수훈(Choi, Su-Hoon),홍성경(Hong, Seong-Kyeong),김준호(Kim, Joon-Ho) 한국구조물진단유지관리학회 2011 한국구조물진단학회 학술발표회논문집 Vol.15 No.1
This paper presents the establishment of an inspection system of gas supply facilites. This system composed of visual inspection, durability assessment, condition assessment and repair-strengthening modules. When the establishment of the system is completed, it is believed to be very useful for managers of gas supply facilities and technicians to perform safety inspections.
초음파법을 이용한 시험방법에 따른 균열깊이 추정의 신뢰성에 관한 연구
김종호 ( Kim Jong-ho ),오광진 ( Oh Kwang-chin ),최재곤 ( Choi Jae-goun ),박승범 ( Park Seung-bum ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.2
As a general rule, ultrasonic pulse velocity method is used for estimation of crack depth in concrete structure. Due to the heterogeneous nature of concrete and indirect measured value of transmitted time, ultrasonic pulse velocity has so many variations ; for example, inherent properties of concrete, transmission arrangement and so on. This study is to estimate of crack depth in concrete specimens using ultrasonic pulse velocity method. Experimental studies were performed on concrete specimen containing vertical crack which width is 2mm and depth is 100mm. Thus we can bring to a conclusion as below. When the center distance of transducers is 400mm, the precision of the pulse velocity method was excellent. And this indicates that the influence of alien material is present.
거세트판 접합용접부의 피로균열 보강효과에 대한 계측분석
지승구 ( Ji Seung Gu ),이흥수 ( Lee Heung Soo ),김종호 ( Kim Jong Ho ),최재곤 ( Choi Jae Goun ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.1
In this study, fatigue cracks in welled joints of gusset plate at the lower flange of the plate girder bridge, field measurements were carried out and their test results were analyzed. Results obtained are summarized as follows. The proposed the reliability of the reinforcement effect by comparing the maximum stress value with the limit of the fatigue detailed category E.
광물동정과 화학조성 분석을 통한 댐 주변 침출 퇴적물 평가
이종근 ( Lee Jong Keun ),이정석 ( Lee Jeong Senk ),최재곤 ( Choi Jae Goun ),장재창 ( Jang Jae Chang ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.1
If deposits occur around the dam, it is possible to suspect the erosion of the internal material of the dam. Piping can occur if the dam internal material is eroded, and such piping can be a serious safety hazard for the dam. XRD and XRF were performed on the investigated sediments and dam core materials. XRD and XRF were carried out to confirm the constituent minerals and chemical composition of the samples. This method can be applied to detect the possibility of erosion of the material constituting the dam.
오정근 ( Oh Jeong Keun ),전우용 ( Jun Woo Yong ),손정훈 ( Son Jeong Hoon ),김수종 ( Kim Su Jong ),최재곤 ( Choi Jae Goun ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.2
Most of the domestic jetties of jacket structure were designed by SACS with design criteria based on “Design Standards for Harbour and Fishery Port”. In fact, companies of structural maintenance and Inspection fail to conduct proper safety assessment of jetties of jacket structure using SACS due to a manpower shortage. But instead, they are using MIDAS to conduct safety assessment of these jetties as an alternative to using SACS. The purpose of this study is to provide the rational way for MIDAS user to assess jetties of jacket structure using SACS.