摘要
赛道挡风是保证冬奥会比赛如期进行的关键。首先基于气象站监测数据,利用独立风暴法开展了北京冬奥会延庆赛区内气象观测风速分析,获得了赛区内气象观测位置50年重现期的基本风速。进而对延庆赛区进行了地形风洞试验,获得了气象站与赛区建筑之间的风速比例关系,给出了赛区关键位置50年重现期的基本风压。然后,采用节段模型的方式进行了国家雪车雪橇中心风洞试验,获得了主体结构设计所需的体型系数和围护结构设计所需的极值风压系数。之后对国家高山滑雪中心滑降赛道进行赛时风环境评估,并通过风洞试验获得了雪道挡风墙的挡风性能参数,直接应用于滑降赛道挡风设计。结果表明:延庆赛区仅有1日比赛延期至次日,其他比赛均在计划当日进行,挡风墙的设置保证了冬奥会高山滑雪比赛的顺利进行。
The windbreak of the downhill track is the key to ensure that Olympic Winter Games can be held on schedule.Based on the monitoring data of meteorological stations,the analysis of meteorological observation wind speed in Yanqing Competition Area of Beijing Olympic Winter Games was carried out firstly by using the independent storm method,and the wind speed of 50-year return periods at the meteorological observation positions was obtain.Thereafter,the wind environment wind tunnel test for Yanqing Competition Area was carried out,the wind speed proportional relationship between the meteorological station and the competition area buildings was obtained.The design wind pressure of the key positions in the competition area with a return period of 50-year return was given.Then,the wind tunnel test of National Sliding Center was carried out by using the segmen model,and the shape coefficient required for the main structure design and the extreme wind pressure coefficient required for the envelope design were obtained.The wind environment of the downhill track of National Alpine Skiing Center was evaluated during the race,and the windbreak performance parameters of the windbreak wall of the ski track were obtained through the wind tunnel test,which were directly applied to the windbreak design of the downhill track.The results show that only 1 day of the event in Yanqing Competition Area was postponed to the next day,and other events were held on the planned day.The installation of the windbreak wall ensured the smooth progress of the alpine skiing event in Olympic Winter Games.
作者
李波
刘坤
那苓
刘文珽
田玉基
陈平
白凡
LI Bo;LIU Kun;NA Ling;LIU Wenting;TIAN Yuji;CHEN Ping;BAI Fan(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Beijing Key Laboratory of Structural Wind Engineering and Urban Wind Environment,Beijing 100044,China;Beijing Enterprises Jingao Construction Co.,Ltd.,Beijing 102100,China;China Architectural Design and Research Institute Co.,Ltd.,Beijing 100044,China;School of Information and Communication Engineering,North Central University,Taiyuan 030051,China)
出处
《建筑结构》
北大核心
2023年第9期91-96,共6页
Building Structure
基金
中央高校基本科研业务费专项(2022JBZY030)
北京市科技计划资助项目(Z201100005820007)
高等学校学科创新引智计划(B13002)。
关键词
冬奥会
办赛设施
抗风
挡风
风洞试验
风荷载
Olympic Winter Games
competition facility
wind resistance
windbreak
wind tunnel test
wind load
