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1방향 중공관 데크슬래브의 휨 성능에 관한 실험적 연구
김기웅(Kim Kee-Woong),김해룡(Jin Hai-Long),윤혁기(Yun Hyuk-Gee),박해영(Park Hae-Young),박성수(Park Sung-Soo) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.1
This study was purposed to evaluate the flexural performance of One-way Hollow Deck Slab through a comparison with the solid slab's and to verify the results of the flexural strength by the linear analysis. For this flexural performance tests, a total of 10 full scale specimens was made. One specimen was the case of conventional solid deck slab. Other 9 specimens were made into 3 shapes of hollow deck slabs which were cycled, rectangular, trapezoidal. Each shape of hollow deck slab was made 3 different sizes. From the results of simple beam loading tests, the flexural strength of hollow deck slab had almost same value with the flexural strength of solid slab. Besides, there was not much difference on the flexural strength and the deflection between hollow deck slab and solid slab even hollow deck slab had changed its size. Result of the tests shows that One-way Hollow Deck Slab was an effective system which is reducing the self-weight and maintaining the flexural strength, compared to solid slab.
김기웅(Kee Woong Kim),한지영(Ji Young Han),홍승분(Seung Bun Hong) 한국사회체육학회 2007 한국사회체육학회지 Vol.0 No.31
On the theoretical assumption that sport performance in competition is influenced predominantly by the psychological states of the performers, a qualitative analysis was made of the psychological dispositions of performers which are deemed to be inherited and to be the foundation of psychological states. A questionnaire which consists of three unstructured open-ended questions was administered to a total of 20 coaches and 40 national-level athletes. A quantitative content analysis revealed that:1) five major positive performance influencers included psychological factors, physiological factors, interpersonal relationship factors, skill and strategy factors;2) similarly, included in the major negative performance influencers were psychological relationship factors, environmental factors, physiological factors, interpersonal relationship factors, and skill factors;and 3) the three most important psychological characteristics to successful sport performance were psychological stability factor, mental toughness, and optimism. These results were discussed with reference to the findings reported in the previous studies, suggesting coaching implications.
연성능력향상을 위한 다이아그리드 시스템의 설계요소에 관한 해석적 연구
김기웅(Kim Kee-Woong),박성수(Park Sung-Soo) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.7
Purpose of this study is to supplement characteristic of brittle failure of diagrid system so as to look for ways to improvement seismic performance of diagrid system. Model for analysis was limited under H/500 in maximum displacement and they are 60-story diagrid system structures which comply with design code of KBC2009. Seismic performance of this model was evaluated by nonlinear static analysis and they consist of analysis model for shear lag and analysis model for ductility capacity. Considered variables are various members of diagrid, size of module, kind of composite structure, use of buckling restrained brace. Used lateral load resisting systems for composite structure are core system, rahmen system, bundle tube system, outrigger system. According to the analysis, shear lag effect is affected by diagrid member’s interval and wider interval reduces shear lag effect. In ductility capacity of the diagrid system, it is not effective to modify kind of composite structure or module size. Only using the Buckling Restrained Brace(BRB) has an effect on improving the ductility capacity. Among these models, pure diagrid system with buckling restrained braces, which didn’t use composite structure, showed the most effective ductility capacity for diagrid system.