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为准确研究低矮房屋的风载特性,基于建造在强台风“黑格比”登陆地点的低矮房屋原型实测房,对强台风“黑格比”登陆的全过程进行了监测,获取了在强台风登陆过程中近地风场及实测房屋表面风压的实测数据。通过对台风登陆过程的风速及风向、阵风因子、湍流度、湍流积分尺度和风速谱等参数的分析,研究了强台风“黑格比”登陆时的近地风场特性,同时介绍了实测房屋及测压系统。结果表明:强台风“黑格比”的最大瞬时风速达到56.7/s,10m in最大平均风速为40.2m/s;台风登陆前,风速及风向脉动变化很大;台风登陆后,湍流度及阵风因子明显减小;风速变大,阵风因子与湍流度有减小的趋势;实测风速谱与von Karman谱吻合较好。研究结果将增进对强台风近地风场的理解和认识,可为今后改进低矮房屋的抗风设计提供参考。
In order to accurately study the wind load characteristics of low-rise buildings, the whole process of the strong typhoon “Hagupit” landing was monitored on the basis of a low-rise prototype prototype room built in the place where the strong typhoon “Hagupit” landed , Obtained the measured data of the wind pressure near the ground and the surface of the measured house in the process of strong typhoon landing. Based on the analysis of wind speed and wind direction, gust factor, turbulence degree, turbulent integral scale and wind speed spectrum during the typhoon landing process, the characteristics of near-surface wind field during typhoon landing are studied. At the same time, Measured housing and pressure measurement system. The results show that the maximum instantaneous wind speed of strong typhoon “Hagupit” reaches 56.7 / s and the maximum average wind speed of 10m in reaches 40.2m / s. The wind speed and direction fluctuate greatly before the typhoon landed; after the typhoon landed, the turbulence And the gust factor obviously decreased. The wind speed became larger, the gust factor and turbulence degree tended to decrease. The measured wind speed spectrum was in good agreement with the von Karman spectrum. The results of the study will enhance the understanding and understanding of near-typhoon wind fields and provide reference for improving the wind-resistant design of low-rise buildings in the future.