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현수 시스템의 케이블 장력 측정을 위한 표준 실험장치의 개발
최만용(Choi Man Yong),박해원(Park Hae Won),이규(Lee Giu),정선재(Jang Sun Jae),이승석(Lee Seung Seok) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.1
현수시스템에서 케이블의 장력은 구조물의 신뢰성을 확인할 수 있는 매우 중요한 요인이다. 본 논문에서는 현수시스템에서 케이블의 정확한 장력 값을 측정하여 그 값의 신뢰성을 확인하고 실제 현수 시스템에 적용할 수 있도록 하기 위해 케이블의 장력을 측정 할 수 있는 표준 실험장치 개발에 관한 연구를 수행하였다. 표준 실험 장치를 직접 설계 제작하였으며 시험편을 제작 실험을 수행하였다. 실험을 통해 케이블의 장력 값을 측정할 수 있으며 실제 현수시스템에서 케이블 장력측정에 적용 할 수 있는 표준 실험 장치를 개발하고자 하였다. This paper describes a new tension measurement system of suspension cable. The suspension cables play an important role in long-span cable-supported bridges, of which the reliability assessment has today been a major topic all around the world. Tension data of a suspension cable in mechanical design and selection of a cable in the construction of a structure helps an engineer and researcher. However, it is difficult to supply the repeatability and the reliability of measurement result in previous technique-vibration acceleration measurement system, load cell technique. In this paper, the tension measurement system of suspension cable and the specimen design for accurate measurement are proposed and the measurement results are described.
최만용 ( Choi Man-yong ),김치엽 ( Kim Chi-yeop ),권일범 ( Kwon Il-bum ) 한국구조물진단유지관리공학회 1998 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.2 No.1
The strain pattern was investigated to develop the techniques for monitoring the health status of the steel truss bridge which was scaled down to 1/15 of the real bridge for the laboratory experiments. The damage scenarios were chosen as 8 cases which was included the sound bridge. The strain measured from the bridge showed the complex shape which has the two or more dynamic vibration modes. When the load vehicle was passed the center of the bridge, the strain pattern was picked at that time. The various damage cases were distinguished from each other by the strain patterns.
비파괴 콘크리트 압축강도 측정용 전자식 타격응답 장치의 신뢰성 평가
최만용 ( Choi Man Yong ),장선재 ( Jang Sun Jae ),박정학 ( Park Jeong Hak ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.2
This paper describes for reliability evaluation of electronic hammer of the non-destructive for compressive strength measurement of concrete. There is test method for rebound number, it is used most plentifully in safety inspection of the infrastructure. This electronic impact hammer, it solved the problem of schumidt hammer. It acquires the reliability which is excellent existing schumidt hammer compared to. The electronic impact hammer measurement data is acquired from the detection coil the velocity which and a degree of acceleration response waveform, it will be able to measure the compressive strength of the concrete. In this paper described, it is reliability evaluation for accurate measure of the compressive strength of the concrete which it is electronic impact hammer.
비파괴 콘크리트 압축강도 측정용 전자식 타격응답 장치 개발
최만용 ( Choi Man Yong ),장선재 ( Jang Sun Jae ),박정학 ( Paik Jeong Hak ),박해원 ( Park Hae Won ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.1
This paper describes for development of electronic impact hammer of the non - destructive for compressive strength measurement of concrete. There is test method for rebound number, it is used most plentifully in safety inspection of the infrastructure. This electronic impact hammer, it solved the problem of schumidt hammer. It acquires the reliability which is excellent existing schumidt hammer compared to. The electronic impact hammer measurement data is acquired from the detection coil the velocity which and a degree of acceleration response waveform, it will be able to measure the compressive strength of the concrete. In this paper described, it is development for accurate measure of the compressive strength of the concrete which it is electronic impact hammer.
최만용 ( Choi Man-yong ),오세욱 ( Oh Se-wook ),허광희 ( Heo Gwang-hee ),박정학 ( Park Jeong-hak ) 한국구조물진단유지관리공학회 2000 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.4 No.1
This study deals with earth pressure acting on CIP wall and displacement of CEP wall with excavation. The primary purpose of this study analysis the earth pressure using displacement and strut axial force by the measured and calculated values with excavation step. Also, through the comparative analysis of measured axial forces with load cells and calculated earth pressure with principle virtual work, it is the purpose of this study to obtain the measurement analysis source that could solve problems for the process of the stage excavation. This paper compares measurement results with analysis results on the earth pressure and displacement of the wall and describes more exact earth pressure and the change of the wall displacement of deep excavation.
최만용 ( Choi Man-yong ),권일범 ( Kwon Il-bum ),김치엽 ( Kim Chi-yeop ) 한국구조물진단유지관리공학회 1997 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.1 No.1
강트러스 교량의 손상발생을 검출하기 위한 기법을 실험실 안에서 연구하기 위하여 실교량을 1/15로 축소한 3차원 강트러스 교량을 제작하고 실험하였다. 강교량의 손상시나리오를 6개로 선정하고 동적 유한요소해석을 수행하여 축소모형 강교량의 동적특성을 해석적으로 검토하였다. 축소 모형 강교량은 8개의 베이(bay)를 갖는 단경간의 복사재로 구성하여 설계하고 제작하였다. 이동하 중차량은 서보모터를 사용하여 140Kg의 최대무게 및 최대속도 4m/sec로 가동할 수 있도록 제작하였다. 이동하중차량에 의한 실험결과 가속도계 신호로부터 주파수 스펙트럼이 손상에 따라 크게 변화하는 것을 확인하였다. 따라서 이러한 동적 특성 검출에 의하여 강교량의 붕괴 이전에 손상을 검출할 수 있도록 상시감시할 수 있음을 알 수 있었다.