中文摘要：

在风灾过程中，许多高度在10m以下的低矮房屋遭到破坏或损毁。为深入了解这类低矮房屋的风载及近地风场特征，基于2005年台风“达维”、2007年热带风暴“范斯高”及季风观测的部分实测数据，对比分析这三种不同风场在离地面为10m、7．5m及6m不同高度处的平均风速及风向、湍流度和阵风因子等风场特征参数。提出针对低矮房屋在不同高度处平均风速及湍流度的变化规律。在此基础上，结合对原型低矮房屋实测数据的分析，验证该规律的可行性，其结果可为改进低矮房屋的抗风设计提供有价值的参考。

英文摘要：

The majority of low-rise buildings are generally susceptible to wind damage, thus it is necessary to gain understanding of the characteristics of wind field for these types of buildings. Based on the measured data for Typhoon ＂Damrey＂ in 2005, monsoon and tropical storm ＂Francisco＂ in 2007, after comparing three types of wind field features at different heights, the mean wind velocity is obtained, and the gust factor, the turbulence intensity at 10, 7.5 and 6 metres above the ground, and the variation patterns of the mean velocity and turbulence intensity are proposed. It is expected that the results should be valuable for the wind-resistance design of low-rise buildings.