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线条风荷载的准确计算是输电杆塔设计的关键一步,角度风荷载分配系数的选取是否合理将直接影响到设计指标的合理性。对常规线条风荷载(0.5Φ1=0.5Φ2=0)的计算原理进行梳理和分析,得到了0~90°范围内的角度风荷载分配系数。同时,通过对风向角θ和线路转角Φ的剖析,推导了线路前后侧360°风吹时的线条角度风荷载分配系数计算公式,并给出了前后侧挡距不同分配比例(0.5Φ1=0.5Φ2,0.5L1∶0.5L2=5∶5、4∶6、3∶7)时的线条角度风荷载分配系数,分析了分配系数的特点,并进行了对比研究。研究结果揭示了线条角度风荷载分配系数的特点,可作为输电杆塔抗风设计的一种参考。
The accurate calculation of line wind load is a key step in the design of transmission towers. Whether the selection of wind load distribution coefficient is reasonable or not will directly affect the rationality of design indexes. The calculation principle of conventional line wind load (0.5Φ1 = 0.5Φ2 = 0) is analyzed and analyzed, and the angle wind load distribution coefficient within the range of 0 ~ 90 ° is obtained. At the same time, through the analysis of the wind direction angle θ and the line rotation angle Φ, the calculation formula of the line angle wind load distribution coefficient when the wind direction is 360 ° is deduced, and the distribution ratio of the front and rear side distance is given (0.5Φ1 = 0.5 Φ2, 0.5L1: 0.5L2 = 5: 5, 4: 6, 3: 7), the characteristic of distribution coefficient was analyzed and compared. The results reveal the characteristics of wind load distribution coefficient at line angle and can be used as a reference for the wind-resistant design of transmission tower.