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채널형강으로 보강된 비좌굴 Knee Bracing System의 실험과 해석에 대한 연구
신지욱(Shin Ji-Wook),이기학(Lee Ki-Hak),이진(Lee Jin) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
In this study, the seismic performance of the Buckling Restrained Knee Bracing (BRKB) system was evaluated through a pin-connected 1-bay 1-story frame. The BRKB system developed in this study were composed of a steel plate as a load-resisting core member and two channel sections to restrain local and global buckling of the core plate. The main purpose of the BRKB system is to be used as an effective tool to restrengthen/rehabilitate of old low- and mid-rise RC buildings, which assumed to be designed with non-seismic designs and details. Thus, in this study, computer analysis models of the BRKB system was developed to verify the test results. The seismic performance of the old RC buildings rehabilitated with the BRKB systems was evaluated through the static and dynamic analysis. The result showed that the BRKB systems would be an effective way to rehabilitate/retrofit the old RC buildings.
다양한 이력 접합부가 적용된 철골 모멘트저항골조의 내진성능평가에 대한 연구
신지욱(Shin Ji-Wook),이기학(Lee Ki-Hak),정성훈(Jeong Seong-Hoon) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.11
This paper presents the seismic performance of steel Moment Resisting Frame(MRF) buildings with various hysteretic connection models using the fragility analysis, which evaluates the probability of damage for the structural systems versus the Peak Ground Acceleration(PGA). For this study, 9-and 20-story buildings with six different hysteresis models(strength and/or stiffness degradation and brittle behavior) were used and five different fundamental periods were developed for the analytical models to evaluate the dynamic characteristics of the model buildings. The fragility curve for each damage level defined in FEMA 356 was investigated and analyzed. In order to calculate the probability of the damage for the structures subjected to the ground motions, Cumulative Distribution Function(CDF) was applied to calculate the probabilistic parameters, such as median values and standard deviation. Based on this research, it is concluded that the building with the Type A connection model, which has been widely used for the analysis were relatively conservative than other connections considered in this study. It is believed that the detailed connection models including the effects of stiffness/strength degradation and the connection types used in this study should be considered to evaluate the accurate performance of structures.
반응수정계수와 주기의 영향이 고려된 철골모멘트저항골조 건물의 내진성능평가에 관한 연구
신지욱(Shin Ji-Wook),이기학(Lee Ki-Hak),김연태(Kim Yeon-Tae) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)
This study was performed to evaluate the effect of Response modification factors (R-factor) and fundamental periods for 3-, 9- and 20- story steel Moment Resisting Frame (MRF) buildings. Each structure was designed using a R-factor of 8, tabulated in 2000 International Building Code provision (IBC 2000) and Korea Building Code (KBC) 2008. In order to determine the maximum and minimum performance expected for structures, an upper bound and lower bound design were considered to each model. Then, each analytical model was designed using different R-factors (8, 9, 10, 11, 12) and four different structural periods with the original fundamental period. A total of 150 analytical models were subjected to 20 ground motions representing the hazard level equal to a 2% probability of being exceeded in 50 years for a detailed case study. To evaluate performance for the structures, the static push-over and non-linear time history analysis (NTHA) were performed and displacement ductility demand was investigated to consider ductility capacity of the structures.
3D 프린터 기반의 3D 스캐너 발전 방향에 관한 연구
신지욱(Shin, Ji Wook),김태성(Kim, Tae Sung) 한국IT서비스학회 2016 한국IT서비스학회 학술대회 논문집 Vol.2016 No.춘계
소품종 대량생산을 지향하던 산업화 시대를 지나 사람들의 다양성을 반영하기 위한 다 품종 소량생산의 시대가 도래하고 있다. 과거 제조업의 과정은 금형과 사출을 기반으로 생산하므로 초기 비용이 많이 소요되었다. 그와 달리 3D 프린터는 초기비용이 낮아 사람들의 초기비용적인 문제를 해결해주며, 다양성을 충족해 줄 수 있는 제품이다. 최근 몇 년 사이에 3D 프린터의 수요가 여러방면에 걸쳐 급격하게 증가하고 있다. 그러나 3D 프린터를 통해 실제 제품을 생산하기 위해서는 프린팅 할 제품의 3D 도면 파일이 필요하게 되는데 3D모델링이 불가능한 경우에는 생산에 어려움을 겪게 된다. 이러한 문제점을 해결하기 위해서 오픈소스의 모델링 공유 사이트가 있지만, 사용자들이 원하는 모델링이 없을 경우 또다시 생산이 지연된다. 이는 3D 스캐너의 중요성을 부각시켜 준다. 3D 스캐너는 물체의 3차원 형상 정보를 수집하여 디지털화 하고 이를 용도에 맞게 가공 해주는 장치이다. 이는 새로운 제조업의 패러다임을 가져오면서, 자동차 산업, 전자 산업, 서비스 산업 등 다양한분야에서 다양한 방면으로 사용을 하고 있다. 또한 과거의 3D 스캐너는 고가성과 전문성으로 쉽게 접하기가 어려웠지만, 최근에는 휴대성과 사용 편리성이 뛰어나고 정밀도 또한 0.04mm ~ 0.1mm 까지 개선이 되어 적용 분야가 크게 확대되고 있다. 이와 같은 사례를 통해 본 논문은 3D 프린터 기반의 3D 스캐너를 통해 향 후 3D 스캐너의 발전 방향을 연구하였다.
강일경(Kang, Il-Kyung),신지욱(Shin, Ji-Wook),조호규(Jo, Ho-Kyoo) 한국건축친환경설비학회 2011 한국건축친환경설비학회 논문집 Vol.5 No.4
The purpose of this study is to investigate the performance of reflective insulation system(RIS) and examine the thermal resistance of air space within various RIS. RIS is a type of thermal insulation with one or more reflective surface including one or more enclosed air space. In this study, the thermal resistances of single air space facing the reflective surface are 0.26㎡ㆍK/W at 10㎜, 0.43㎡ K/W at 20㎜ and 0.45㎡ㆍK/W at 30㎜ respectively. There is no difference in thermal resistance when the enclosed air space is facing single reflective surface or both reflective surfaces. The result shows that RIS with EPS(thermal conductance : 0.032W/mㆍK) and reflective insulation materials can reduce the insulation thickness about 27% than EPS only. Because the insulation performance of RIS depends on the thickness and temperature of air space, direction of heat flux, emissivity of surface facing air space and so forth, the more detailed evaluation should be done before applying RIS.
통계자료를 이용한 주택부문의 에너지소비량 원단위 산정방법
유정현(Yoo, Jung-Hyun),신지욱(Shin, Ji-Wook) 대한건축학회 2014 대한건축학회논문집 Vol.30 No.8
Validate energy saving performance and consumption rate for residential sector, the energy consumption units is very useful to provide different ranking criteria. From this reason, energy consumption units is derived from the statistics survey data that reflected by occupant"s life style and the corresponding residential appliances. Additionally, time use survey data that sequence of activities in household members are collected with time diaries providing a multi faceted material and considered to calculate for energy consumption. The overall energy consumption units found in simulation data is well described by the statistic document and the difference of electricity use was showed between 1.3% and 5.9% associated with house members. Moreover, the heating energy consumption units is reached about 88% for statistic data and literature.
복합센서기반 외기냉방겸용 폐열회수 환기시스템 (HERV System) 개발에 관한 연구
정홍구(Hong-Goo Chung),신지욱(Ji-Wook Shin),이종우(Jong-Woo Lee),조호규(Ho-Kyoo Cho) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7
Heat recovery ventilator with free cooling function and DCV automatic control method has been researched in order to reduce energy consumption more than general heat recovery ventilator. A present study has simulated energy consumption and indoor air quality in various cases of ventilation control method and developed hardware and software such as ventilator with air passage for free cooling, multiple sensor module and control algorithm.
조현(Cho Hyun),이종인(Lee Jong-In),신지욱(Shin Ji-Wook),윤동원(Yoon Dong-Won),방승기(Pang Seung-Ki) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
This study carried out experiments in order to evaluate reduction effects of volatile organic compounds, The experiments consisting of (1) natural ventilation, (2) mechanical ventilation, and (3) bake-out methods were done for newly built apartments during an intermediate period. The apartments for this analysis were located in Seoul on April 5th in 2007, and the number reached six. Test results showed that there was no significant reduction effect depending on the types of experiments when Formaldehyde was used in the analysis. It was also found that the experiment using bake-out showed the greatest reduction effect in the concentrations of TVOC and Toluene at the time of 20 days after the beginning of experiments.