“罗莎”(0716)台风高空实测脉动风特性分析  

High-altitude observation about turbulence characteristics for "Krosa" (0716) strong typhoon

作　　者：武占科[1] 赵林[1] 朱乐东[1] 葛耀君[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《空气动力学学报》2010年第3期291-296,共6页Acta Aerodynamica Sinica

基　　金：国家自然科学基金重点资助项目(90715039;50978203;51021140005);科技部国家重点实验室基础研究项目(SLDRCE08-C-02)

摘　　要：随着我国东南沿海地区200m～500m超高层建筑不断涌现,高空强(台)风环境参数的现场实测和分析工作成为风工程研究的一个重点,这部分内容亦为我国建筑结构荷载规范的空白。2006年8月开始在上海市环球金融中心顶部施工平台架设三维超声风速仪,随施工进度实测了距地面246m至436m不同高度处的脉动风特性,并于2007年10月8日在436m高度处成功捕捉到对上海有较强影响的"罗莎"(0716)强台风全过程风速风向记录时间序列,由此统计分析得到了"罗莎"台风的紊流强度、阵风因子和紊流积分尺度等高空风参数特性,并根据Kol-mogrove理论对水平方向和垂直方向脉动风功率谱密度函数进行了参数拟合。As 200m-500m super high-rise buildings continue to emerge in the southeastern coastal areas of China, the on spot measurement of high-altitude strong wind field parameters has been playing an important role in wind-resistance investigation, which is also blank area in Chinese Loading Coads since there are no corresponding items about wind field characteristics above 300m height from the ground surface. From August 2006, a three-dimensional ultrasonic anemometer has been mounted on the top of working platforms of Shanghai World Financial Center, and turbulent wind characteristics for increasing heights from 246m to 436m have been measured. ＂Krosa＂ （0716） strong typhoon affecting Shanghai area seriously was successfully captured on 8 October 2007 at the height of 436m. The high-altitude turbulent characteristics of ＂Krosa＂ typhoon, such as turbulence intensity, gust factor and integral length scale, etc. were summarized and com- pared. The PSD functions of horizontal and vertical fluctuating wind were fitted based on Kolmogrove theory.

关 键 词：台风 高空实测 脉动风特性 风谱拟合 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]