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초고층 건물 아트리움 공간에서의 제연구획에 따른 시뮬레이션 연구
류형규(Hyungkyou Ryu),배상환(Sanghwan Bae),이병석(Byungseok Lee) 대한설비공학회 2014 설비공학 논문집 Vol.26 No.7
The big issue in fire and life safety protection in atriums is that hot smoke can spread vertically via the atrium openings, and impact atrium floors remote from the fire. Three different strategies to provide fire and life safety protection for atrium space were evaluated in this study, using the FDS model. Strategy A is the atrium protection approach addressed in the Korean Building Fire Protection Code, where atria are required to be enclosed with fire shutters from the 2nd floor to the atrium top, and the ground floor is allowed to open to the atrium; in this case, no smoke control is required. Strategy B is the atrium protection approach, with smoke control provided in accordance with NFPA 92B; in this case, no atrium floor is enclosed. Strategy C is the atrium protection approach, in which some of the upper atrium floors are enclosed (the case of the top atrium floor being enclosed is evaluated in this study), and atrium smoke control is also provided to protect the lower atrium floors.
지중온도 경사를 이용한 효율적 지중에너지 이용 방안에 관한 연구
류형규(Hyungkyou Ryu),정민호(Minho Chung),이병석(Byungseok Lee),류효준(Hyojun Rhew),최현준(Hyunjun Choi),최항석(Hangseok Choi) 대한설비공학회 2014 설비공학 논문집 Vol.26 No.9
This paper proposes an optimum operation method for open type ground heat exchangers. A series of TRTs and artificial heating/cooling operations were carried out while monitoring temperature in the hole of SCW. The ground temperature naturally increases with depth, but a switch between the cooling/heating mode results in a change in the distribution of ground temperature. The effect of the mode change was evaluated by performing LMTD and COMSOL multiphysics analysis for a reduced model with the depth of 150 m. As a result, in the cooling mode, the upstream operation is more efficient than the downstream operation and reduces EWT by 2.26℃. On the other hand, in the heating mode, the downstream operation is advantageous over the upstream operation and increases EWT by 3.19℃. The merit of the optimum operation will be enhanced for the typical dimension of SCW with a depth of 400~500 m. In the future, an open type ground heat exchanger system adopting the optimum operation with variation in the ground temperature will be used in practice.
Fiber Reinforced Polymer를 이용한 아치형 지중구조물의 시공
김성곤,김형규 서울産業大學校 2005 논문집 Vol.54 No.2
이 연구에서는 "FRP 지중 구조물의 실용화"를 위한 기초단계 연구인 해석 및 실험의 결과로 얻어진 패널의 재료, 최적 단면을 바탕으로 실제 크기의 반원형 아치형 지중구조물을 제작, 현장에 시험 시공을 실시하여 시공의 용이성을 검증하였으며, 계측 장비를 동원한 시공단계별 구조물의 안정성을 검증하였다. 현장 시험시공의 내용으로는, 분할 제작된 FRP 패널의 실제 현장 설치 시 거동을 분석하기 위하여 현장(고속국도 현장)에서 제작단계별로 응력 및 처짐을 측정하고 구조물 완공 후 정적재하 실험을 실시하였으며 이를 통하여 여러 문제들을 규명하여 구조적으로 안정되고 경제적인 FRP 구조물을 개발 할 수 있었으며, 기초단계에서 실시한 기초 재료실험에 이어 실제 사용된 패널의 물성 확인과 연결부등의 응력 집중현상, 연결부의 거동, 노천방치후으 재료의 상태 등을 측정하였다. 일련의 현장 시험시공을 통하여, 제작된 분할 패널의 조립, 설치단계별 시공 용이성을 검증하였으며, 구조적 안정성을 계측을 통하여 검증하였다. 현장시험시공 중 얻어진 결과를 분석 한 결과 복합재료의 지중구조물에의 뛰어난 현장 적용성 및 구조적 안정성을 확인 할 수 있었다. The research aims to evaluate the structural capability through the analysis and experiment for the "practical use of FRP Soil-Structure", and it has verified and approved the facilities of the construction operation and the safety of construction stage by the test operation in the site. The result of this test operation is to analysis the possibilities of the installation of separated manufactured FRP panel and have measured the sustain of the structure and complete the pulling test after the completion of the structure so that many problems are investigated through all this analysis and test could be developed the FRP structure in the stability. By the test operation in the site, the research have verified use of assembly of separated manufactured panel, practical use in construction stage and structure safe. The structure could be confirmed the safety and applicable of composite material of the structure at the consequence of this analysis.