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ILP法에 의한 鐵筋콘크리트 T형보의 最適設計에 關한 硏究
김한철,김종인 大邱大學校附設 基礎科學硏究所 1984 基礎科學硏究 Vol.1 No.-
This study is directed for the optimum design of R. C T-beam section for the minimum cost design of R.C structures based on the strength design Methood of ACI(318-77) code, In this study, the design constraints based on ACI code provisions, such as flexural and shear constraints are taken as the constraints of the non-linear formulation for the optimum design of R. C T-beams, and cost function including the material cost of concrete and reinforcing steel for mimimum cost design of stuctures are adopted as the objective function. The incremental Linear propogramming technique is used as the optimization technique of the non-Linear programming problem formulated in this study by successively transformming non-Linear equations into the Linear equations. It has been observed that the optimization model and technique computerized by FOR-TRAIN program for the optimum design of RC T-beam proposed in this study significantly reduce the construction cost, when compared with the conventional design. Also, it has been proved that optimization algorithm deviced in this study is very efficient for the convergence of optimization sections.
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修正 增分法환을 利用한 Deep Arch의 幾何的 非線形解析
김한철,민경주 대구대학교 과학기술연구소 2000 科學技術硏究 Vol.7 No.1
In this study we discuss modified incremental methods for geometrically non-linear analysis for path-following algorithms. For purpose we drive, base on a parametrization of the solution path. A unifed presentation of some popular continuation procedures used an analysis of structural mechanics in introduced. Updated weighting factors are introduced in the constraint eguation in order to get better convergence characteristics in the case when localized deformations occur.
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김한철,하광순,김성중,서미로,강상호,이두용,송용만,이종성,임희정,조창석,연제원,김성일,조송원,송진호,류용호 한국원자력학회 2017 Nuclear Engineering and Technology Vol.49 No.8
In order to develop a domestic research roadmap for severe accidents, a special committee was establishedby the Korean Nuclear Society. One of the subcommittees discussed the characteristics and therelevant technical issues in the stages of fission product release and physical forms of radionucliderelease and transport. The group members developed a tree to identify fission product release phenomenaby tracing failures of individual defense-in-depth barriers and added possible countermeasuresagainst failure. For each elemental issue, they searched for technical problems by examining the phenomena,accident management actions, and regulatory aspects relevant to the mitigation features forcontainment, including mitigation strategies against containment bypass accidents. Regulatory concerns,including the source term and the acceptance criteria for radionuclide release, were also considered. They identified further research needs regarding important technical issues based on the degree of thecurrent knowledge level in Korea and in foreign countries, looking at the significance and urgency ofissues and the expected research period required to reach an advanced level of knowledge. As a result,the group identified the 12 most important and urgent issues, most of which were expected to requiremid-term and long-term research periods
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김한철,박영민,최혁제 한국화재감식학회 2021 한국화재감식학회 학회지 Vol.12 No.1
In addition to industrialization, high-income crops with high added value are drawing attention in the agricultural sector through facility cultivation. In particular, due to climate change caused by global warming, the number of plant cultivation farms such as vinyl greenhouses is on the rise. Among them, Sungju-gun is the largest melon producing area in the country, and many farms use vinyl greenhouses to produce melons. In addition to this situation, various causes of fires occur in vinyl greenhouse facilities, and high combustibility of materials causes a lot of damage. In this study, we will examine the fire risk of electrical facilities, which account for a large proportion of the various fire causes occurring in vinyl greenhouse facilities, and in particular, we will set up four types of physical damage to the wires due to arbitrary construction of the user and the fire risk caused by insulation damage, to identify them through over-current pass experiments and current-pass experiments using a load equipment, and come up with measures to improve them through sharing with local governments.
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