宁夏建筑结构基本风压分析研究

为了减轻风灾，加强建筑结构抗风设计，选取宁夏18个市县历史最大风速资料，利用耿贝尔分布估算了宁夏50a和100a重现期最大风速，通过伯努利方程计算宁夏的基本风压．结果表明。宁夏50a和100a重现期基本风压与最大风速的分布基本相同，均呈“南小北大”型分布；5个主要城市基本风压的最大值均出现在春季，而最小值集中出现在夏季和秋季．在建筑结构抗风设计时应考虑海拔高度的影响，才能保证计算的基本风压值较准确；在春季和冬季应加强抗风措施，可有效地减少风灾损失．

Study of basic wind pressure of building structure in Ningxia

In order to decrease gale disaster and improve building structure design,history data of maximum wind velocities which come from 18 cities and counties in Ningxia are selected for 50 a and 100 a maximum wind velocity estimating with probability distribution and basic wind pressure calculating with Bernoulli equation.Similar distribution is found between maximum wind velocity and basic wind pressure,most like"big in north and small in south";the maximum basic wind pressure of five cities was occurred in spring,and the minimum was in summer and autumn.Only elevation is taken into account in designing of wind-resistance of building structure so that the basic pressure value can be calculated exactly;and it is benefit for decrease loss of gale disaster that step of wind-resistance is increased in spring and winter.