关键词: 输电杆塔, 输电线路, 角度风荷载, 导、地线, 分配系数, 抗风设计, 风向角, 风振控制

Abstract: Accurate calculation of wind loads on power lines is critical in designing transmission towers. Selection of the distribution coefficients of angle wind loads directly affects the rationality of design specifications. The calculation principles of linear wind load in general design conditions (0.5Φ₁=0.5Φ₂=0) are analyzed in this paper, and the distribution coefficients corresponding to winds with angles of 0-90 degrees are obtained. Moreover, the calculation formula for distribution coefficient of winds with angles of 0-360 degrees is also derived based on an analysis of the wind angle and line angle. The front and back side wind load distribution coefficients for different allocation ratios(i.e., 0.5Φ₁=0.5Φ₂, 0.5L₁∶0.5L₂=5∶5, 4∶6, 3∶7) are calculated, respectively, and their characteristics are analyzed and a comparison study is made. The study result reveals the characteristics of wind load distribution coefficient of transmission lines and can be used as a reference for designing transmission towers.

Key words: transmission tower, transmission line, angle wind load, conductor and ground wire, distribution coefficient, wind design, wind angle, wind-induced vibration control