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- 저자 : 김창성 (검색결과 598 건)
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김창성,최세휴,김승억,마상수 한국강구조학회 2002 韓國鋼構造學會 論文集 Vol.14 No.2
study developed an automatic design method of steel frames which uses nonlinear analysis. The geometricnonlinearity was considered using stability functions. Likewise, the transverse shear deformation effect in a beam-column was explained. A direct search method was used as an automatic design technique. The unit value of each part was evaluated using LRFD interaction equation. The member with the largest unit value was replaced one by one with an adjacent larger member selected from the database. The weight of the steel frame was considered as an objective function. On the other hand, load-carying capacities, deflections, inter-story drifts, and ductility requirement were used as constraint functions. Case studies of a two-dimensional and a three-dimensional two-story frames were presented. 본 논문에서는 비선형 해석을 이용한 강뼈대 구조물의 자동화설계를 수행한다 . 기하학적 비선형은 안정함수를 사용하여 고려한다. 보-기둥 부재에 대하여 전단변형 효과를 고려한다 . 자동화 설계 기법으로는 직접 탐색법을 사용한다 . LRFD의 상관방정식으로 각각의 부재의 상관 계수 값을 계산하여 가장 큰 상관 계수 값을 가지는 부재의 크기를 데이터베이스에서 단계별로 증가시킨다 . 목적함수는 강뼈대 구조물의 중량을 사용하며, 제약조건식은 하중-저항능력, 처짐, 층간 수평변위 및 연성도를 고려한다 . 2차원과 3차원 2층 강뼈대구조물에 대한 예제 해석을 수행한다.
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심폐소생술 전화 지도를 포함한 119구급상황관리센터 이용 현황 분석
김창성,김혁훈,김기운,이슬기,김수태,최상천,조준필 대한응급의학회 2018 大韓應急醫學會誌 Vol.29 No.4
Objective: Analyses of the status of 119 emergency situation control center (119 ESCC) usage are lacking. Therefore, this study investigated the status of the 119 ESCC usage, including dispatcher-assisted cardiopulmonary resuscitation (DA-CPR) instructions. Methods: The emergency activity daily reports and emergency instruction sheets of 119 ESCC from January to December 2016 were reviewed. For more accurate status analysis, the computerized data of the 1339 Emergency Medical Information Center from January to December 2011 were also reviewed. Results: In 2016, the total usage of the 119 ESCC was 1,393,876 calls, which was 27.8% lower than the 1,930,977 calls in 2011. Of the 1,393,876 eligible calls, the most common call was hospital guidance (n=743,799, 53.4%), followed by first aid (n=397,620, 28.5%), disease consultation (n=150,128, 10.8%), medical oversight (n=81,174, 5.8%), and interhospital transfer (n=5,123, 0.4%). Regarding the user number per 10,000 persons, Daejeon was the greatest at 57.2, whereas Changwon was the lowest at 11.5. A total number of DA-CPR was 19,439. The time from the call to chest compression were 173±88.6 seconds in the subjects having previous cardiopulmonary resuscitation training and 184.0± 88.2 in the subjects having no such training (P<0.001). Conclusion: The ratio of first aid instructions, including DA-CPR, among total usage of the 119 ESCC increased but the overall usage of the 119 ESCC decreased. Therefore, further efforts will be needed to improve the quality and professionality of the information provided through the operation of 119 ESCC.
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K 현대 미술관 전시공간의 자연채광 성능 평가에 관한 연구
김창성,김강수 대한건축학회 2003 대한건축학회논문집 Vol.19 No.2
Daylight is one of major parameters in art gallery design. To enhance space quality many architects have tried to predict daylight performance in art gallery. This paper is to predict daylight performance in the atrium of K Contemporary Art Gallery. After the actual measurements, a 1/30 scale model was made and model experiments were carried out. Then, computer simulations were carried to compare the actual and the model measurements with results of simulations. The used programs were SUPERLITE IEA 2.0 and RADIANCE and each of data were simulated in the clear sky with sun condition. Results show that illuminance ratio between inside and outside illuminance have distributions of 0.29~0.36% in the actual measurements. Also, illuminance ratio have distributions of 0.38~0.52% in the scale model tests and 0.34~0.46% in SUPERLITE and 0.39~0.49% in RADIANCE simulations. Each of distributions has a similar result. According to results to evaluate direct sun effect, damage of exhibition space by sunlight was much on the summer solstice. Sunlight flowed into floor of exhibition space could be reduced 19% amount of direct sun by installing vertical louver and 81% amount of direct sun by vertical + horizontal louver more than no louver condition. Also sunlight flowed into exhibition wall was reduced 24% amount of sunlight by vertical louver and 58% amount of sunlight by vertical + horizontal louver. With the analysis of luminance ratio by computer simulation, luminance of daylighting source was influenced by louver. Specially, luminance of daylighting source was increased some quantity by installing vertical louver and background luminance decreased greatly by horizontal louver. Therefore, computer programs can be used effectively in the early design and design development phase to pedict daylighting performance in a large exhibition space of art gallery.
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