풍향패턴에 따른 굼벨 모델 시뮬레이션에 의한 풍향풍속성의 적용율 평가에 관한 연구

정영배,Chung, Yung-Bea 한국강구조학회 2010 韓國鋼構造學會 論文集 Vol.22 No.6

본 연구는 바람에 민감한 영향을 받는 건축물 또는 구조물에 있어서 풍향풍속을 고려하여 평가하는 방법을 제안하며 지역별 년 최대풍속에 따른 풍향풍속 특성에 대한 기초적인 결과를 정리한 것이다. 본 풍향풍속성 평가방법에서는 년최대풍속의 기상청 데이터를 기초로 하여 극치분포를 통해 적합성을 확인하였으며 풍향성을 고려하기 위하여 풍향풍속별 풍향패턴을 4그룹으로 구분하여 풍향풍속성 평가방법을 시도하여 제안하였다. 연구결과는 서울, 통영, 인천지역의 년최대풍속 기상데이터를 사용하여 전풍향풍속이 Gumbel분포에 의한 적합성을 확인하였으며, 이 전풍향풍속의 Gumbel model은 패턴별 4그룹 풍향풍속 Gumbel mode을 지배하는 독립된 확률특성을 가지므로 풍향패턴 4그룹 풍향풍속성의 평가를 통하여 적용율을 제안하였다. 연구결과는 년최대풍속에 의한 Gumbel분포의 적합성에 따른 서울, 통영, 인천 지역의 풍향패턴 4그룹 풍향풍속성을 고려한 새로운 적용율을 제안하였다. In this study, an assessment method that considers the effects of directional wind speeds on buildings or structures that are sensitive to wind is proposed. Also, the basic characteristics of directional wind speeds were assessed by means of local annual maximum wind speeds. From the method of assessment of the characteristics of directional wind speeds, their goodness-of-fit was verified by applying extreme value distribution to the data on annual maximum wind speeds from the Korea Meteorological Administration. To consider the characteristics of directional winds, an assessment method is suggested that divides the directional wind pattern of each directional wind speed into four groups. From the study results, all the data on directional wind speeds based on the Gumbel distribution were examined using data on annual maximum wind speeds from Seoul, Tongyung, and Incheon. Since the Gumbel model of all directional wind speeds has independent probability characteristics that govern the 4 directional wind pattern groups, the application ratio proposed was based on the assessment of these four groups. According to the goodness-of-fit of the data on the annual maximum wind speeds based on the Gumbel distribution, new application ratios were proposed that consider the directional wind speeds in Seoul, Tongyung, and Incheon.

A Basic Study for Wind Energy of Building Cladding using Computational Fluid Dynamics

정영배(Chung, Yung-Bea) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.11

The new and renewable energy today has a great interest in all countries around the world. In special it has need more limit of the fossil fuel that needs of low carbon emission among the social necessary conditions. Recently, the high-rise building demand the structural safety, the economic feasibility and the functional design. The high-rise building spends enormous energy and it satisfied the design in solving energy requirements. The requirements of energy for the building depends on the partly form wind energy due to the cladding of the building that came from the surroundings of the high-rise building. In this study of the wind energy, the cladding of the building was assessed a tentative study. The wind energy obtains from several small wind powers that came from the building or the surrounding of the building. In making a cladding the wind energy forms with wind pressure by means of energy transformation methods. The assessment for the building cladding was surrounded of wind speed and wind pressure that was carried out as a result of numerical simulation of wind environment and wind pressure which is coefficient around the high-rise building with the computational fluid dynamics. In case of the obtained wind energy from the pressure of the building cladding was estimated by the simulation of CFD of the building. The wind energy at this case was calculated by energy transform methods: the wind pressure coefficients were obtained from the simulated model for wind environment using CFD as follow. The concept for the factor of E_f was suggested in this study. C_p=frac{P_{surface}}{0.5{rho}V^{2ref}} E_c=C_p{cdot}E_f Where C_p is wind pressure coefficient from CFD, E_f means energy transformation parameter from the principle of the conservation of energy and E_c means energy from the building cladding. The other wind energy that is E_p was assessed by wind power on the building or building surroundings. In this case the small wind power system was carried out for wind energy on the place with the building and it was simulated by computational fluid dynamics. Therefore the total wind energy in the building was calculated as the follows. E=E_c+E_p The energy transformation, which is E_f will need more research and estimation for various wind situation of the building. It is necessary for the assessment to make a comparative study about the wind tunnel test or full scale test.

초고층 건물 주변의 풍환경 예측을 위한 수치 시뮬레이션에 관한 연구

정영배(Chung Yung bea) 한국주거환경학회 2003 주거환경(한국주거환경학회논문집) Vol.1 No.1

The results of numerical simulation of wind environment around super high-rise building were presented. The analysis of aerodynamic response due to wind-induced forces and wind effect to surrounding buildings is important to high-rise building. The wind flow pattern around high-rise building was simulated. A Navier-Stokes-Solver (FLUENT) with Quick spatial discretization scheme and RNG k- turbulencemodel has been applied to the computation of the three dimensional turbulent flow.

건축물의 구성재에 따른 쥐성장 생활환경과 체중 증감효과에 관한 실험적 연구

정영배(Yung-Bea Chung),김미옥(Mi-Ok Kim),최철웅(Chul-Yung Choi) 한국실내환경학회 2006 한국실내환경학회지 Vol.3 No.4

In architecture, constitutions of space are subjected to the structural material and interior finishing material. Interior environment can exert a great effect on people by means of space constitution. In this study the constitution of space was set to consider five materials: control, wood, steel, wire mesh, and concrete structural material. In this study, experiments with mice, were carried out on condition of each living environment with different living environment using control, wood, steel, wire mesh and concrete structural material. The experiments with mice were made by five-month-old mice(BALB/C) with about 15 grams weight. In order to evaluate the adaptability of the target mice, such variables as body weight, food consumption, and water consumption were monitored against living environment for normal BALB/C mice during the same period. The weight, total foods, and total water consumption were measured under the living environments for 55 days with 2~3 days intervals. To test five different living environments, i.e., control, wood, steel, wire mesh and concrete, 5 mice were allocated for each group. According to the results of this study, the case of wood living environment resulted in a gain in weight with statistical significance. The other side of steel, wire mesh and concrete showed a slight decrease for weight. The weight variation of the experimental mice was assumed under five different living environments that resulted from the stabilized environmental conditions such as the wood living environment.

실내건축공간구조에서의 화재시뮬레이션에 관한 연구

정영배(Chung, Yung-Bea) 대한건축학회 2016 대한건축학회 학술발표대회 논문집 Vol.36 No.2

태풍시 건축물 피해의 중요도 분석

정영배(Chung, Yung-Bea) 대한건축학회 2016 대한건축학회 학술발표대회 논문집 Vol.36 No.2

메쉬없는 CFD 시뮬레이션에 의한 저층 건축물 외피 마감을 위한 풍압계수에 관한 분석

정영배(Chung, Yung-Bea) 한국주거환경학회 2014 주거환경(한국주거환경학회논문집) Vol.12 No.3

A simulation for computational fluid dynamics is carried out to predict wind pressure coefficients for cladding. The simulation is carried out against a low-rise building for cladding and the results are compared with the field data, wind tunnel experimental data, and those obtained by the computational simulation using CFD by means of Smoothed-particle hydrodynamics(SPH). SPH is a computational method used for simulating fluid flows It is a mesh-free Lagrangian method, and the resolution of the method can easily be adjusted with respect to variables such as the density. The CFD simulation by means of the mesh-free Lagrangian method based on SPH was used a commercial tool. It is found that the predicted wind coefficients agree well with the reference data. According to thus results, it is compared and analyzed the wind pressure coefficients over low-rise building for cladding.

CFD를 이용한 건축물 구조벽체의 온도변화에 관한 분석

정영배(Chung, Yung-Bea) 대한건축학회 2016 대한건축학회 학술발표대회 논문집 Vol.36 No.2

측정에 따른 중층규모 건물의 감쇠정수 평가법에 관한 연구

정영배(Chung Yung-Bea) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)

The purpose of this study was to analyze the damping coefficients of building and to assess the calculating method of the time history domain and damping measuring system on middle-rise buildings. The damping coefficients was shown very random values by means of the characteristics of the building, and so on. The results of this study were as follows; the curve fitting was computed goodness-of-fit test on frequency domain and run down test on time domain under compared the designed values and the measured values.

저층건축물의 구조골조 설계용 풍압계수 및 풍하중 평가 약산식의 제안

박재형,정영배,하영철,Park, Jae Hyeong,Chung, Yung Bea,Ha, Young Cheol 한국강구조학회 2009 韓國鋼構造學會 論文集 Vol.21 No.3

본 연구는 각주형 저층건축물에 작용하는 지점별 풍압을 다점동시측정시스템을 이용하여 건물 폭과 깊이변화에 따른 평균풍압분포 특성에 대한 기초적인 결과를 정리한 것이다. 본 실험에서는 건물의 폭과 깊이를 변화시킨 5개의 각주형 풍압실험모형이 사용되었으며, 풍동실험은 금오공과대학교 소재 토출식 경계층풍동에서 실시하였다. 실험결과는 저층건축물의 건물 폭 및 깊이의 변화에 따른 저층건축물의 평균풍압분포 변화경향을 건축물의 풍상면, 풍측면 및 풍하면 중심으로 특성을 분석하였다. 실험결과를 토대로 저층건축물의 구조골조 설계용 풍하중을 합리적으로 산정하기 위해 필요한 새로운 풍압계수 및 간략한 약산식을 제시하였다. This study summarizes basic results on the characteristics of mean wind pressure distribution on rectangular low-rise buildings with various breadths and depths through simultaneous multi-point wind pressure test. 5 types of rectangular wind pressure test models with various breadths and depths have been made for this study. Wind pressure tests are conducted on the Boundary Layer Wind Tunnel at Kumoh National Institute of Technology. The characteristics of mean wind pressure distribution with respect to various breadths and depths of low-rise buildings are analyzed into windward face, leeward face and side faces of building. From the results, new wind pressure coefficients and simplified wind load estimating formula for the resonable design of the structural frames of low-rise building were proposed.