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백선영(Paek, Sun-Young),남병희(Nam, Byung-Hee),유장열(You, Jang-Youl),김영문(Kim, Young-Moon),유기표(You, Ki-Pyo) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.1
Traditional architecture of Korea are made of natural materials and therefore are vulnerable to micro-climates. This study analyzed the characteristics of breeze with a focus on Silsangsa located in Namwon City to measure the micro-climates that are created by main angle of the wind direction, establish related data and analyze the characteristics of the air current through computational fluid dynamics. The measurements show that with the main angle of the wind direction serving as a reference point, the wind velocity behind the buildings of Silsangsa was 0.3~0.5m/s, which is about 50-70% lower than the wind velocity at the reference height of 1m/s. The variance of velocity speed between buildings in Silsangsa was 20% and the variance of humidity was 25% which was higher than the average.
3개동 아치형 하우스 단지의 위치별 풍압계수 분포 연구
백선영(Paek Sun-Young),조슬기(Cho Seul-Gi),유장열(You Jang-Youl),유기표(You Ki-Pyo),김영문(Kim Young-Moon) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
The study on wind load that greatly affects the structure design of agricultural facilities has been conducted mostly in regards to independent a single-span arched house or two-span arched house. However, looking at the actual greenhouse layout, they are installed in a single-span arched house or two-span arched house of several complexes rather than a single complex. Like this, the changes in the position of greenhouses can affect the distribution of wind pressure coefficients, and therefore it needs to closely examine the changes in wind pressure coefficients depending on the position of greenhouses. Accordingly, the study builds a single-span arched greenhouse with a constant distance between complexes, calculate wind pressure coefficients generated from each surface of a greenhouse through the wind tunnel experiment under the conditions of boundary layer flow, and analyze changes in wind pressure coefficients from the surface of a single-span greenhouse by each position according to wind direction in order to provide the basic data necessary in structure design of greenhouses.
백선영(Paek, Sun-Young),유장열(You, Jang-Youl),김영문(Kim, Young-Moon),남해경(Nam, Hae-Kyeong),유기표(You, Ki-Pyo) 대한건축학회 2016 대한건축학회 학술발표대회 논문집 Vol.36 No.2
There are various studies on the vulnerabilities of traditional Korean architecture caused by material characteristics. As a part of such efforts, this study conducted a simulated CFD analysis on Wanju Hwaamsa Temple in each wind direction in order to induce changes in temperature and humidity according to increase of wind velocity due to micro climate characteristics. The results showed that wind velocity affects humidity. Air flow analysis results can be utilized as fundamental data to present the method of building preservation through control of wind velocity.
백선영(Paek Sun-Young),조슬기(Cho Seul-Gi),유기표(You Ki-Pyo),김영문(Kim Young-Moon) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.8
Every year rural facilities are damaged by natural disasters in Korea, and among them, green houses take about 90%. In order to reduce the damage, it is urgent to evaluate the structural safety of rural facilities and various studies are being made at home and overseas. Thus, this study conducted a wind tunnel experiment on green houses built according to domestic standards, and obtained the distribution of wind pressure coefficient. In the results of the wind tunnel experiment, the wind pressure coefficient was highest on the roof surface. On the roof surface, the minimum wind pressure coefficient at the edge of the entrance and the middle part was around 30%~40% higher than that at the edge of the lateral walls. As to variation according to the roof height and width of green houses, roof height was found to have a significant effect. In House 1 and House 6, between which roof height was different by around 34%, the minimum wind pressure coefficient was higher by up to 2 times at the upper part of the entrance than at the lower part. In the results of experiment on the variation of wind pressure coefficient according to wind angle, the variation was large on the roof surface and lateral walls. The inclination (20°) of lateral walls recommended by the standards for green houses was not much advantageous over 0°.
비닐하우스의 형태와 배치에 따른 지붕면 피크외압계수 특성분석
유기표,백선영,김영문,You, Ki-Pyo,Paek, Sun-Young,Kim, Young-Moom 한국공간구조학회 2010 한국공간구조학회지 Vol.10 No.1
국내 전체 시설원예에서 파이프 골조로 시공된 비닐하우스가 99.2%이며 구조적으로 취약한 단동형 유리온실이 대부분이다. 이에 현재 국내에서 사용하고 있는 단동형 연통형 단동형 3개로 구성된 배치형 비닐하우스의 지붕면에 대한 피크외압계수에 대해서 알아보고자 한다. 실험결과 단동형이 연동형보다 30%정도 큰 피크외압계수로 분포하고 있었다. 배치형 비닐하우스의 지붕면 피크외압계수도 3개동 모두에서 단동형보다 크게 20-30%정도 크게 분포하고 있었다. Among the protected horticulture facilities in Korea, 99.2% are pipe-framed green houses and most of them are structurally vulnerable single-span type green houses. This study examined peak external pressure coefficient for the roof surface of a green house group composed of single-span and a multiple-span green houses. According to the results of the experiment, the distribution of peak external pressure coefficient was around 30% higher in the single-span greenhouse than in the multi-span ones. The external pressure coefficient for the roof surface of the vinyl house group was, in all of the three vinyl houses, was around 20%-30% higher than that for single-span greenhouses.
김영문(Kim, Young-Moon),유기표(You, Ki-Pyo),유장열(You, Jang-Youl),백선영(Paek, Sun-Young),남병희(Nam, Byung-Hee) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.2
The performance of composite tuned mass damper(ctmd) for reducing wind-induced vibration of tall building is investigated. Optimum tuning frequency, damping ratio amd mass ratio of ctmd for minimizing the rms response of the damped main structure under random loads was determined. The control force generated by the actuator of the ctmd was estimster by linear quadratic regulator(lqr)controller. Fluctuaing along-wind load was simulated numerically using the alomg-wind load spectrum by Solari. The controlled rms response with controlled rms response with ctmd is about 23~32% rms response of original tall building. therefore, ctmd system is effective inreducing wind-induced vibration of tall building.
김영문(Kim, Young-Moon),유기표(You, Ki-Pyo),유장열(You, Jang-Youl),백선영(Paek, Sun-Young),남병희(Nam, Byung-Hee),김두기(Kim, Doo-Kie) 대한건축학회 2016 대한건축학회 학술발표대회 논문집 Vol.36 No.2
Composite tuned mass damper(CTMD) is a vibration control device consisting of an active-passive tuned mass dampers supported on the primary vibrating structure. The performance of CTMD in mitigating wind-induced vibration of tall building is investigated. Optimum parameters of a passive tuned mass damper(PTMD)for minimizing the variance response of the damped primary structure under random loads, with different mass ratio of an active tuned mass damper(ATMD) to a PTMD have been used for the optimum parameters of CTMD. The active control force generated by ATMD actuator was estimated by using linear quadratic Gaussian(LQG) controller, and the fluctuating along-wind load, treated as a stationary random process, was simulated numerically using the along-wind load spectrum proposed by Solari .Comparing the along-wind rms response of tall building without a CTMD, the CTMD is effective in reducing the response to 40%~45% of the response without the CTMD. Therefore, the CTMD system was effective in reducing wind-induced vibration of tall building.
조슬기(Cho Seul-Gi),백선영(Paek Sun-Young),유장열(You Jang-Youl),유기표(You Ki-Pyo),김영문(Kim Young-Moon) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
The standard applied to the current structural design of the Korean model greenhouse is set by the rural agricultural public corporation, however, the new standard set by the conjoined efforts by the Korean Architectural Institute is not applied and the old standard is still applied to the structural designs. In some cases, the Korea Architectural Institute’s standard which applies only to general buildings are currently being applied to the structural design of greenhouse models. Therefore, this research thesis analyzes the effects of wind pressure coefficient on the Korean model greenhouse based on the architectural structure design standards by performing various wind tunnel tests and analyzed the wind pressure coefficient. And accordingly, this test will provide a comparison analysis between the current architectural structure design standards and the wind pressure coefficient to derive an applicable foundation for the Korean model greenhouse’s structural design.
유기표,김영문,유장열,백선영,You, Ki-Pyo,Kim, Young-Moon,You, Jang-Youl,Paek, Sun-Young 한국공간구조학회 2014 한국공간구조학회지 Vol.14 No.2
Meteorological observatories use measuring boards on even ground in open areas to measure the amount of snowfall. However, it is very difficult to evaluate the accurate amount of snowfall because of the effects of the wind. Therefore, this study tried to determine the internal wind flow inside a windbreak fence to identify an area that was not affected by wind in order to measure the snowfall. We performed a computational fluid dynamics analysis, wind tunnel test of the type and height of the windbreak fence, and analyzed the wind flow inside the fence. The results showed that a double windbreak fence was better than a single windbreak fence for reducing the wind velocity. The reduction of the wind velocity was highest in the middle of a windbreak fence with a width of 4 m and a height of 60cm, where the windbreak fences were fixed to the ground.