建筑结构学报2018，Vol.39Issue(2)：122-129,8.DOI:10.14006/j.jzjgxb.2018.02.014
基于超越阈值概率的某千米级摩天大楼室外平台行人风环境评估
Assessment of pedestrian wind environment of outdoor platforms of a thousand-meter-scale mega-tall building using threshold exceedance probability approach
摘要
Abstract
In order to assess the pedestrian wind environment of a thousand-meter-scale mega-tall building,pedestrian wind environment of the most unfavorable outdoor platform of this building was assessed using the threshold exceedance probability approach,and partitions of wind comfort and wind safety for the outdoor platform were put forward for practical applications.Firstly,the meteorological data,at 10 m height in Dalian from the year 2004 to 2014,were statistical analyzed,and the probability for wind direction and three parameters of the Weibull distribution function for wind speed under 16 wind direction sectors were acquired.Then,based on the pedestrian hourly mean wind speeds and gust wind speeds of the most unfavorable platform obtained from the wind environment experiment and CFD simulation,the strictness for both the Lawson criterion and NEN 8100 criterion to assess the wind environment were compared in detail.Lastly,wind environment assessment of the outdoor platform was conducted using the Lawson criterion,and the influences of different wind shield heights and forms on the pedestrian wind environment were analyzed.The results show that,for wind environment assessment,the NEN 8100 criterion is stricter than the Lawson criterion.Furthermore,the pedestrian wind environment of the baseline model with 3 m height wind shields is very poor,and some useful aerodynamic measures should be taken to improve its quality.The aerodynamic measures,such as variance of the wind shield heights and forms,are proved to be very effective to improve the wind safety,but less effective to improve the wind comfort.关键词
千米级摩天大楼/行人风环境评估/超越阈值概率法/Lawson标准/NEN 8100标准/风安全性/风舒适性Key words
thousand-meter-scale mega-tall building/pedestrian wind environment assessment/threshold exceedance probability approach/Lawson criterion/NEN 8100 criterion/wind safety/wind comfort分类
建筑与水利引用本文复制引用
郑朝荣,陈勇,金钊,武岳,李胤松..基于超越阈值概率的某千米级摩天大楼室外平台行人风环境评估[J].建筑结构学报,2018,39(2):122-129,8.基金项目
国家自然科学基金项目(51108142),中国建筑股份有限公司科研基金项目(CSCEC-2015-Z-39,CSCEC-2010-Z-01-02). （51108142）
