摘要
风环境是评价人居生活质量好坏的重要指标,随着国民经济的快速发展,越来越多的高耸楼宇应运而生,这些楼宇会较大程度地改变已有小区的风环境,给小区居民正常生活带来困扰,而当前对该问题的针对性研究还十分匮乏。以长沙通用时代国际社区为研究背景,利用大尺度风洞(10 m×3 m×21 m)对新增高耸建筑后的小区风环境进行了全方位、多工况试验研究,并基于超越概率法对有无新增高耸建筑小区风环境舒适度与危险度进行定量评估。结果表明:城市小区平均风剖面与湍流度剖面指数值要远高于规范值,表明城市小区具有较大的地表粗糙度。新增高耸建筑会显著改变其邻近区域风环境,如高耸建筑对通用时代小区100、200、300 m范围内平均风速分别造成了25%、6%和2%的加速作用,在增加高耸建筑后小区风环境舒适度与危险度超越概率最大值分别增加了2倍和6倍。
Urban wind environment is an important index to evaluate the quality of human life.In recent years,with the rapid development of the economy,more and more new high-rise buildings have been built and greatly changed the existing residential wind environment.It leads a great trouble to the normal life of the residents in the community.However,the target researches focus on this problem are still very scarce.In this paper,the Tongyong Shidai community is chosen as the case study,and all-round and multi-condition experimental study on the residential wind environment influenced by high-rise building is analyzed by large scale wind tunnel(10 m×3 m×32 m).Meanwhile,exceeding probability method is used to quantitatively evaluate comfort degree and risk degree of the residential area with or without new high-rise buildings.The results show that the profile index values for average wind profiles and turbulence profiles are much higher than the values of standard,which indicates that urban area has greater surface roughness.The added high-rise buildings will significantly change the wind environment of the adjacent areas.When the high-rise building is added,the average wind speed in current community within 100,200,300 m is increased by 25%,6%and 2%,respectively.The maximum value of the wind environment comfort and risk exceeding probability is increased by two times and six times,respectively.
作者
沈炼
唐春朝
韩艳
汪阔
李春光
蔡春声
SHEN Lian;TANG Chunchao;HAN Yan;WANG Kuo;LI Chunguang;CAI Chunsheng(School of Civil Engineering,Changsha University,Changsha 410022,P.R.China;School of Civil Engineering,Changsha University of Science&Technology,Changsha 410076,P.R.China;School of Civil Engineering,Hunan University,Changsha 410082,P.R.China)
出处
《土木与环境工程学报（中英文）》
CSCD
北大核心
2021年第6期103-112,共10页
Journal of Civil and Environmental Engineering
基金
国家自然科学基金(51808059)
湖南省自然科学基金(2018JJ1027,2019JJ50688)
长沙市杰出青年创新培育计划(kq195004)。
关键词
高耸建筑
风环境
超越概率
风洞试验
风场分布
high-rise building
wind environment
exceeding probability
wind tunnel test
wind field characteristic
