建筑结构学报2018，Vol.39Issue(4)：1-7,7.DOI:10.14006/j.jzjgxb.2018.04.001
考虑极值风速方向性的围护结构设计风荷载概率估计方法研究
A probabilistic method for estimating extreme wind pressure on structures considering direction effect of extreme wind speed
摘要
Abstract
The design wind load on building envelop,which represents the extreme wind pressure in a given return period,is generally estimated by the most unfavorable method in engineering application,which is not precise in the sense of probability.The relatively precise design wind loads can only be obtained when the characteristic of both the random values of wind speed and aerodynamic coefficient,such as their randomness,directivity and correlation,are taken into consideration.In view of this problem,a probabilistic method for estimating the design wind load on building envelope was proposed in this paper which had an overall consideration of the randomness and direction effect of the extreme wind speed and aerodynamic coefficient.The three main factors for estimating the extreme wind pressure,which were the distributions of directional extreme wind speed,the Cook-Mayne wind pressure coefficient and the information of the correlation among extreme wind speeds in different wind directions,were induced from the existing samples.Then,a formula for estimating extreme wind pressure was proposed based on the three main factors.The accuracy and practicability of the proposed method is verified by an example of a high-rise building in Shanghai,in which the results are compared to the most unfavorable values widely used in engineering work.关键词
围护结构/风荷载/概率估计方法/风向性/相关性Key words
retaining structure/wind load/probabilistic method/wind direction effect/correlation分类
建筑与水利引用本文复制引用
张秉超,全涌,顾明..考虑极值风速方向性的围护结构设计风荷载概率估计方法研究[J].建筑结构学报,2018,39(4):1-7,7.基金项目
国家自然科学基金面上项目(51278367). （51278367）
