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하이브리드 FRP로 보강된 철근콘크리트 보의 휨 거동에 관한 연구
남덕우,윤승조 청운대학교 건설환경연구소 2011 청운대학교 건설환경연구소 논문집 Vol.6 No.2
The construction method making use of FRP fiber has a strength in that it makes construction work easier than the existing method; however, this method shows a weakness that causes brittle failure of reinforced structures. To minimize such a weakness of FRP fiber, ongoing research is being done actively on the hybrid FRP sheet, which is manufactured by combining more than one fiber. The researcher manufactured total six test bodies by making use of hybrid FRP fiber in which carbon fiber and glass fiber were admixed, and performed tests taking reinforcement material type and reinforcement method as variables. The results from test revealed that, in case of the test bodies of which reinforcement methods were different, their compressive strength and maximum load were similar, so then reinforcement methods doesn't affect reinforcement effect. In the test bodies using different reinforcement materials, the test body using FRP sheet has the higher maximum load and displacement at the time of applying the maximum load, than the test bodies with FRP panel. Therefore, it is considered that when reinforcing the building making use of hybrid fiber, FRP sheet is more effective than FRP panel. 최근 우리 사회는 건물의 노후화로 인한 보수 보강에 대한 관심이 그 어느 때 보다 높아져있다. 특히 FRP 섬유를 이용한 공법은 기존 공법에 비해 간편하게 시공할 수 있는 장점이 있으나, 보강된 구조물의 취성파괴를 유도하는 단점을 가지고 있다. 이러한 단점을 보완하기 위하여 하나이상의 섬유를 조합하여 제조하는 하이브리드(hybrid) FRP시트에 대한 연구가 활발히 진행되고 있다. 본 연구에서는 탄소섬유 및 유리섬유를 혼합한 하이브리드 FRP 섬유를 이용하여 보강재의 종류, 보강공법을 변수로 총 6개의 실험체를 제작하여 실험을 실시하였다. 실험결과, 보강공법을 달리한 실험체의 경우 압축강도 및 최대하중이 거의 유사하게 나타나 보강공법에 따른 보강효과는 거의 없는 것으로 나타났으며 보강재 종류를 달리한 실험체에서는 패널보다는 시트를 사용한 실험체가 최대하중과 최대하중시의 변위가 크게 나타나 시트보강이 보다 효과적인 것으로 판단된다.
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Problems and Countermeasures in the History of Korean Church's Discipleship Training
남덕우 한국실천신학회 2012 신학과 실천 Vol.0 No.33
This study pointed out the problems in the history of discipleship training of Korean church and proposed their countermeasures. Although there are many previous studies on the growth of Korean church and discipleship training, there is very few of studies on the problems and their countermeasures. To this end, this study examined such issues. This study described the history of discipleship training in Korean church focusing on Sarang Community Church which successfully combined and fulfilled discipleship training with Korean church. For theoretical understanding, this study described the definitions of discipleship training as well as its purposes and stages. This study also summarized the history and achievements of para-church such as Campus Crusade For Christ and Navigators in relation to Korean church. In addition, focusing on the textbooks, publications and papers used missionary organizations and Sarang Community Church to describe the responses to and process of discipleship training. From the early 1970s, Campus Crusade For Christ used 10 step bible study textbooks and Navigators used the stepwise textbooks for discipleship training, which were found to focus on evangelism and nurturing. In particular, this study described the influence and history of discipleship training in Korean church focusing on the minister of Han Hem Ok at Sarang Community Church. Korean church rapidly expanded discipleship training in 1980 along with stable economy and the increased need for qualitative education and training for plenty of believers in church. Socially the increase of Christians increased the social responsibility of Korean church, under which discipleship training was more needed. The training and nurturing process of missionary organizations focusing on systematic bible study challenged the church. Under this situation, Han Hem Ok at Sarang Community Church combined this to build the framework for practical discipleship training. Han Hem Ok published「Awakening the Laity」in 1984, which described the theory and practices of discipleship training and opened a seminar to distribute it. However, unlike such goals, there were many problems. This study proposed their countermeasures to help Korean church grow in a healthy manner.
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전산해석을 통한 RC-SC 이종부재 접합시스템 구조거동분석
남덕우,김갑순,이종보,한성흠,임남형 한국방재학회 2016 한국방재학회논문집 Vol.16 No.5
When steel plate concrete (SC) structure is partially applied to reinforced concrete (RC) structures, connecting part between each structure is generated. In previous research, connection systems, such as the top & bottom baseplate-types, were developed and their structural integrity was confirmed with the actual bending tests. In the present study, the integrity of both baseplate types were numerically investigated and verified through the comparison between experimental and analytical results. Using the numerical models, the structural behavior of connection systems is analyzed. This research suggests the analysis results on the wingplate spacing in this study be able to apply the future optimal design. 강판콘크리트구조(SC)가 철근콘크리트(RC) 구조물에 부분 적용될 경우, RC 구조와 SC 구조간의 이종부재 접합부 구간이 발생된다. 선행연구에서는 이종부재 접합시스템인 상단 및 하단 베이스플레이트형 접합시스템을 개발하였으며, 실증실험을 통하여 두 접합시스템의 구조건전성을 확인하였다. 본 연구에서는 전산해석을 통해 두 접합시스템의 구조건전성을 확인하였으며, 해석 및 실험결과 비교를 통해 전산해석모델의 타당성을 검증하였다. 전산해석모델을 활용하여 두 접합시스템의 구조거동을 분석하였으며, 윙플레이트 간격에 대한 해석결과가 향후 최적설계에 적용될 수 있도록 제시하였다.
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