국내 최대 기계 및 로봇 연구정보

공학설계D/B

공학설계D/B 게시판 내용
Volume Title	Wind Engineering
Volume No	Wind speeds and turbulence - mean hourly and gust speeds, extreme speeds, turbulence characteristics.
DATA Title	Strong winds in the atmospheric boundary layer. Part 1: mean-hourly wind speeds.
DATA Item	82026
KEYWORD	atmosphere, roughness, speed, terrain, wind
ISBN	0 85679 407 4
ABSTRACT	ESDU 82026 provides methods for estimating the variation of strong mean-hourly wind speeds in the atmospheric boundary layer. The data are particularly applicable in calculations of wind loads on buildings and structures. The range of applicability includes heights between ground level and the edge of the Earthchr(39)s boundary layer (500-3000 m or 1600-9600 ft ) over various types of terrain including those where step changes in surface roughness occur upwind of the site. The methods described, and summarised in calculation sheets, start with a known reference wind speed applicable for a specified terrain and height such as taken from a map of extreme wind speeds. Factors are then given by which this value must be multiplied to account for the terrain roughness at the site in question, for changes in terrain upwind of the site and for different heights above the ground. Separate statistical factors are given to account for return periods and risks of exceedance other than applicable to the reference wind speed. Guidance on topographical effects is given such as those produced by embankments, escarpments and nearby hills. For the U.K. a map of the once-in-50 year mean-hourly wind speed is provided together with factors giving the equivalent directional extremes in 30 degree sectors based on work from the Building Research Establishment. Sources are provided of extreme wind speed data in other countries. The methods on which these simplified procedures are based are programmed in ESDUpac A9232, see ESDU 92032.