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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°.
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.
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.
실측과 CFD해석을 이용한 완주 화암사의 미기후 특성에 대한 연구
조경숙(Cho, Kyung-suk),백선영(Paek, Sun-yong),김윤상(Kim, Yun-sang),남해경(Nam, Hae-kyeong),김석희(Kim, Suk-hee) 대한건축학회 2015 대한건축학회논문집 Vol.31 No.12
There have been carrying many studies to investigate the underlying causes of weathering damage to wood at Buddhist temple buildings, including all their wooden buildings. But the methods of their studies were not carried on the view point of the micro climatic changes such as temperature and humidity, which were the underlying causes of weathering damage. So this study aims to identify the characteristics of air flow inside Hwaamsa Temple site, which is built on a mountain, and whose buildings are different physical levels with their pillars of varying heights. To carry out this study the field measurement of factors (temperature, humidity, wind speed and direction) were measured and their data were analyzed with the computational fluid dynamics (CFD). Based on the results of measuring changes data in temperature and humidity as two inside locations and five locations outside of the temple. As the result the inside temperature and humidity in the Geungnakjeon was evenly distributed, whereas that of the outside was unevenly distributed depending on the location. To a great extent, the speed of wind affects humidity. In the case that the Myeongbujeon in the temple were demolished, there has been a 20-30% increase in the wind speed near the Geungnakjeon Such an increase in the wind speed is thought to affect factors such as the wooden material by stabilizing changes in humidity near the temple.
측벽이 없는 축사와 벤로형 유리온실에 대한 풍압계수 분포 연구
조슬기(Cho Seul-Gi),백선영(Paek Sun-Young),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
As the current wind load standard for agricultural facilities is not applicable as a load standard for internal buildings, and a more accurate wind load evaluation standard for agricultural facilities is required. In this study wind tunnel experiments on the distribution of wind pressure coefficients for prototype agricultural facilities of livestock shed and glass greenhouse are performed. In livestock shed, wind pressure coefficient on the roof surface in the upward direction was higher than that in the downward direction for both uniform flow and turbulence boundary layer. On the middle of the roof and the front and rear edges, wind pressure coefficient in the upward direction was higher by up to 70% than that in the downward direction. In glass greenhouse, wind pressure coefficient on the front and the sides was higher than that on the roof surface. According to wind direction, the maximum wind pressure coefficient appeared at the windward edge, and the minimum wind pressure coefficient did at the leeward edge.
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.
유장열(You, Jang-Youl),백선영(Paek, Sun-Young),유기표(You, Ki-Pyo),김영문(Kim, Young-Moon) 대한건축학회 2013 大韓建築學會論文集 : 構造系 Vol.29 No.12
The start of the freeway era in Korea has led to a dramatic increase in the demand for road traffic between cities, and the following damages have been emerging. Examples include sunshine and ventilation disturbance emerging from the construction of roads, bridges, and tunnels which have led to crop damages. The ventilation disturbance damages due to the wind resulting from freeway facilities (noise barrier, road embankment) are continuously on the increase. Accordingly, the purpose of this study is to use an culvert to research methods which can promote wind movements which have been modified from road mounding, perform wind tunnel test from different wind speed, compare changes in the overall air current conditions following the number and form of culvert, and discover the ventilation effects which promote smooth wind flow.