某摩天大楼室外平台行人风环境数值研究  

NUMERICAL INVESTIGATION ON PEDESTRIAN WIND ENVIRONMENT OF OUTDOOR PLATFORMS OF A MEGATALL BUILDING

作　　者：郑朝荣[1] 王洪礼[2] 李胤松 丁焕龙 

机构地区：[1]哈尔滨工业大学结构工程灾变与控制教育部重点实验室,哈尔滨150090 [2]中国建筑东北设计研究院有限公司,沈阳110006 [3]成都市建筑设计研究院,成都610015

出　　处：《工程力学》2018年第1期118-125,共8页Engineering Mechanics

基　　金：中国建筑股份有限公司科研基金项目(CSCEC-2010-Z-01-01);中国博士后第五批特别资助项目(2013T60377)

摘　　要：由于风洞阻塞率的限制和室外平台上测点的布置要求,某千米级摩天大楼的风环境试验只能采用节段模型,因此如何将试验数据用于实际大楼室外平台的行人风环境评估是一个需要解决的关键问题。为解决这一问题,该文在对CFD数值模拟方法的可行性进行验证的基础上,采用该方法研究了摩天大楼整体模型与节段模型的行人风环境特性,比较了不同挡风板措施的影响;利用统计学中的四分位法确定了整体模型的最不利风环境平台为平台4;最后,将整体模型平台4与节段模型平台2的CFD结果进行比较,确定了由节段模型向整体模型转换的风速调整系数,从而建立了由节段模型风环境试验数据向实际大楼行人高度风速转换的纽带,为后续的行人"风舒适性"与"风安全性"评估奠定基础。Due to the limitation of the blocking ratio of wind tunnel and the requirement of sufficient measuring points on the outdoor platforms of a thousand-meter-scale megatall building, the wind environmental experiment can only be conducted for a sub-configuration of the building. Therefore, the problem should be solved at first is： How to assess the pedestrian wind environment of outdoor platforms of the megatall building based on the experimental data of the sub-configuration？ To solve this problem, characteristics of pedestrian wind environment of both the full model and the sub-configuration of the megataU building were investigated using the CFD simulations and wind environmental experiment. Firstly, comparisons of the experimental data and CFD results of pedestrian wind environment of the sub-configuration with different wind shields were conducted, and the results show good agreement. Therefore, the feasibility and credibility of the CFD simulations were validated. Secondly, distributions of pedestrian wind speeds on every platform of the full model with different wind shields were compared via the CFD simulations, and the most unfavorable outdoor platform was determined to be the platform 4 by using the quartiles method in descriptive statistics. Thirdly, the pedestrian wind environment of both the platform 4 of the full model and the platform 2 of the sub-configuration were compared via the CFD simulations, and an adjustment coefficient for the pedestrian wind speed from the sub-configuration to the full model was proposed. Therefore, a link between experimental data of the sub-configuration and pedestrian wind speeds on the platforms of the real megatall building was established, which lays a solid foundation for the wind comfort and wind safety assessment of the megatall building in the future.

关 键 词：千米级摩天大楼 室外平台 行人风环境 CFD数值模拟 四分位法 

分 类 号：TU973.213[建筑科学—结构工程]