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이후룡(Lee Hoo-Ryong),김영문(Kim Young-Moon),유기표(You Ki-Pyo) 대한건축학회 2010 大韓建築學會論文集 : 構造系 Vol.26 No.9
In Korea, 99.2% of protected agriculture facilities are pipe?framed vinyl houses, and most of them are structurally vulnerable single?span glass greenhouses. Thus, this study purposed to examine the distribution of peak external pressure coefficient in the roof surface of single?span vinyl houses as well as of a set of three single?span green houses. In addition, we attempted to identify factors determining the distribution shape of peak external pressure coefficient in a set of green houses using the shape of airflow analyzed through CFD software. According to the results of experiment, the peak external pressure coefficient was higher when three single?span green houses were installed adjacently than when they were installed separately. As to the distribution of peak external pressure coefficient, the maximum static pressure was observed on the side walls and on the entrance and the maximum negative pressure was observed at the center of the roof surface. When the distribution of wind pressure coefficient according to wind direction was compared with the result of CFD analysis, the distribution of wind speed in the result of CFD analysis was correlated with the distribution of wind pressure coefficient.
모의눈의 상사와 풍동실험장치를 이용한 건축물의 적설형태에 대한 연구
유기표,이후룡,You, Ki-Pyo,Lee, Hoo-Ryong 대한건축학회 2011 대한건축학회논문집 Vol.27 No.4
We need to know snowdrift patterns in order to assess snow load on a building. Various methods have been studied to evaluate snowdrift patterns, but the most effective one is the use of snow particle. This study examined how to simulate of snow particle, and analyzed snowdrift patterns on buildings using a wind tunnel system. Snow particle was produced with sodium bicarbonate. Snowdrift patterns on buildings simulated using snow particle were compared with measured data obtained from a real building (the roof of low-rise building and antarctic building). In the results of wind tunnel experiment with buildings using snow particle, the snowdrift patterns on flat roof and gable roof according to wind velocity agreed well snow accumulation of real building. The form of snow accumulation around the antarctic building was similar to the form of snow accumulation actually measured by Mitusuhashi.
모의눈의 상사와 풍동실험장치를 이용한 건축물의 적설형태에 대한 연구
유기표(You Ki-Pyo),이후룡(Lee Hoo-Ryong) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.4
We need to know snowdrift patterns in order to assess snow load on a building. Various methods have been studied to evaluate snowdrift patterns, but the most effective one is the use of snow particle. This study examined how to simulate of snow particle, and analyzed snowdrift patterns on buildings using a wind tunnel system. Snow particle was produced with sodium bicarbonate. Snowdrift patterns on buildings simulated using snow particle were compared with measured data obtained from a real building (the roof of low-rise building and antarctic building). In the results of wind tunnel experiment with buildings using snow particle, the snowdrift patterns on flat roof and gable roof according to wind velocity agreed well snow accumulation of real buidling. The form of snow accumulation around the antarctic building was similar to the form of snow accumulation actually measured by Mitusuhashi.
오러피스의 설치개수에 따른 동조액주관댐퍼의 감쇠특성에 대한 연구
송창현(Song Chang-Hyun),이후룡(Lee Hoo-Ryong),유장열(You Jang-Youl),유기표(You Ki-Pyo),김영문(Kim Young-Moon) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
Tuned liquid column damper is kind of passive mechanical damper for suppressing structural vibration and its damping is generated by flow passing through the orifice in the horizontal column. Also, the damping effect is determined by the so-called head loss coefficient that mainly depends on the orifice size. In this paper, the experiment was carried out with two orifices in the placed in the sides of the horizontal column for different natural frequencies(0.55㎐, 0.64㎐). The head loss coefficient was assumed based on the characteristics of tuned liquid column damper according to the porosity(20%, 40%, 60%, 80%) of the installed number of the orifice and the characteristics, theoretical analysis and measured results of the height of the wave of the vertical column according to the excitation amplitude(5㎜, 10㎜, 20㎜)
유기표(You Ki-Pyo),황진택(Hwag Jin-Taik),이후룡(Lee Hoo-Ryong),윤현재(Yoon Hyun-Jae),김영문(Kim Young-Moon) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.4
Wind pressure experiments are conducted using a pressure transducer in order to examine the change of wind pressure in tall buildings, but the equipment is expensive and difficult to fix directly on the model. Thus, wind pressure experiments are often performed using pipes and tube taps. In many cases, however, because of the reduced scale in wind tunnel experiments and other reasons, the pipe for measuring wind pressure at a specific position of a tall building cannot be maintained constant. Thus, the present study obtained a pressure transfer function according to the length and thickness of tube tap and the shape of tube in the model, and conducted a calibration experiment using a restrictor . The results of the experiment are as follows. 1) The effect of the length of the tube tab installed in the model was insignificant that it was negligible in the tube pressure measuring system using a tube. 2) In case the tube tab was bent when a model was built, the length of the bent part did not have a significant effect on pressure. 3) When the tube installed inside the model was twisted, it did not have a significant effect on the result of wind pressure measurement.