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低矮房屋在强风作用下倒塌破坏给村镇区域造成严重损失,因此研究低矮房屋表面风荷载特性和分布规律,建立有效的抗风设计方法尤为重要。对10种屋面倾角、3种高深比、3种宽深比,共60个双坡低矮房屋模型进行了风场数值模拟研究,采用分区法获得屋面最不利风荷载分区体型系数,并分析了屋面倾角、高深比、宽深比对风压分布的影响,利用最小二乘法对各分区体型系数进行了屋面倾角、高深比和宽深比三参数的拟合,并将拟合公式和多国风荷载规范给定值进行比较,验证了拟合公式的可靠性。以拟合公式为基础,给出了我国荷载规范中风荷载分区体型系数的建议值,并用于屋面风荷载的计算,改进我国荷载规范中平均风压的计算方法,给出了合理的抗风简化计算公式。
Therefore, it is very important to study the characteristics and distribution of surface wind loads on low-rise houses and establish an effective wind-resistance design method. The wind field numerical simulation of 60 double-slope low-rise buildings with ten kinds of roof inclination, three kinds of aspect ratio, three kinds of width-depth ratio was carried out. The division coefficient was used to obtain the body coefficient of the most unfavorable wind load on the roof, Roof inclination, aspect ratio, depth-depth ratio of the wind pressure distribution, using the least square method for each partition body coefficient of roof tilt angle, aspect ratio and aspect ratio of the three parameters to fit, and the fitting formula and multi-country wind Load specifications given a comparison, verify the reliability of the fitting formula. Based on the fitting formula, the recommended value of body coefficient of stroke load in China is given, which is used to calculate the wind load on roof and improve the calculation method of average wind pressure in Chinese load code. The reasonable wind resistance simplification Calculation formula.