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Review of Design Flexural Strengths of Steel–Concrete Composite Beams for Building Structures
정란,임종진,황현종,엄태성 한국콘크리트학회 2016 International Journal of Concrete Structures and M Vol.10 No.3
Recently, as the use of high-performance materials and complex composite methods has increased, the need for advanced design specifications for steel–concrete composite structures has grown. In this study, various design provisions for ultimate flexural strengths of composite beams were reviewed. Design provisions reviewed included the load and resistance factor design method of AISC 360-10 and the partial factor methods of KSSC–KCI, Eurocode 4 and JSCE 2009. The design moment strengths of composite beams were calculated according to each design specification and the variation of the calculated strengths with design variables was investigated. Furthermore, the relationships between the deformation capacity and resistance factor for flexure were examined quantitatively. Results showed that the design strength and resistance factor for flexure of composite beams were substantially affected by the design formats and variables.
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鄭蘭 三陟大學校 1996 論文集 Vol.29 No.1
Teaching programming in schools is a particularly hot topic now. A reasonable pedagogical philosophy is "The more we know about what students know, the better we can teach them". The main motivation for this paper is to improve the quality of programming education. Through a better understanding of what goes wrong, we can find more effective teaching strategies and more appropriate teaching categories. In this paper, novice mistakes, characteristics of mental representation of novice, and debugging features of novice are investigated. Based on them, teaching effective problem-solving skills for introductory computer programming courses are suggested.
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탄소섬유판을 이용한 철근콘크리트보의 전단내력 보강공법에 관한 실험적 연구
정란,문희종 단국대학교 1999 論文集 Vol.34 No.-
Reinforced concrete structures often exhibit structural and nonstructural cracking due to a variety of reasons. The purpose of this study is to evaluate the rehabilitation effects of R/C beam for shear with Carbon Fiber Laminate(C.F.L) Test parameters are the depth of R/C beam, existence of stirrups and thickness of Carbon Fiber Laminate(C.F.L) Carbon fiber laminate was attached to the concrete using epoxy mortar. The behavior of R/C beam strengthened with carbon fiber laminate(C.F.L) is analyzed from the test results. According to the test results the rehabilitation effects for the shear capacity of specimen with stirrups were clearly observed. However, the specimen which had not stirrups did not show clear rehabilitation effects. Also, the increasement of shear capacity was shown when the beam has higher effective depth.
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정란,이희경,김성철,유성훈,김중구,Chung, Lan,Lee, Hee-Kyoung,Kim, Sung-Chul,Yoo, Seong-Hoon,Kim, Joong-Koo 한국콘크리트학회 1998 콘크리트학회지 Vol.10 No.6
Compressive strength of concrete compression members strengthend with carbon fiber laminate(CFL) were studied from the test results. Test parameters are spacing, thickness, width, ply and spliced length of carbon fiber laminates. Specimens strength with sheets failed with sudden tensile rupture of the laminate, which indicate very brittle failure mode. Test result shows that closer spacing and to increas thickness of CFL is more effective. But strengthening ratio with 1-ply CFL is more effective than that of specimen with 2-ply CFL. Compressive strength capacity of specimen splied 24cm shows almost similar strength to that of non-spliced specimen. The ultimate load carrying of specimen strengthened with CFL ranges 1.11~1.86 times of that of non-strengthened specimen.
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반복하중을 받는 철근의 부착 응력도에 관한 실험적 연구
정란,박현수,조동철 단국대학교 신소재기술연구소 1991 신소재 Vol.1 No.-
지진하중에 대한 철근콘크리트 구조물의 거동을 예측하기 위해 지금까지 진행하였던 많은 실험들이 단순증가 반복하중을 작용시키고 있다. 그러나 실제 지진에 의해 발생되는 하중은 불규칙 반복하중으로써 이전까지 관례적으로 행해졌던 규칙적인 단순증가 반복하중에 의한 실험결과가 얼마만큼 신빙성이 있는가를 검토할 필요가 있다. 본 연구에서는 지진하중에 대한 실험에서는 어떠한 하중을 가져야 실제 거동과 근사한 결과를 얻을 수 있는가를 예측하기 위하여 철근콤크리트 구조물의 구조적 취약부분인 보-기둥 접합부에 규칙적인 단순증가 반복하중과 불규칙 반복하중을 작용시켜 접합부의 부착응력도의 분포를 비교 분석하였다. The prediction and estimation of R/C structure behavlor subjected to earthquake type loading is partly based on the experimental results of the monotonically increased cyclic loading, rather than that of the irregularly increased cyclic loading. However, actual earthquake is typical random vibration. In this respect, comparing and analysing experimental test results of R/C specimens subjected to monotonically increased cyclic loading and irrcgularly increased cyclic loading, this study proposes the research direction of irregularly increased cyclic loading during earthquake.
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AISC規準에 의한 鐵骨構造物의 解析 및 設計를 위한 Computer의 應用
정란 단국대학교 1980 論文集 Vol.14 No.-
The purpose of this program is to develope the system which saves us the time, manpower and cost to take up with the designing architectural steel structure. Not perfect, but fundamentally, this repeated betterment program will be able to advance highly to the architectural industry through the saved human energy.
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