中文摘要：

为了保持结构的整体性能以及分配剪力和抗扭，高压输电塔的设计中都要设置一定间距的横隔面。横隔面的设置位置和数量的多少影响到结构的整体抗风性能。以典型的500kV超高压双回路直线自立塔为例，通过有限元的精细化建模，研究在不同横隔面设置方式下输电塔线耦联体系的动力响应。耦联体系的模态分析结果表明：在横隔面设置不当的情况下，耦联体系会过早地出现局部振型；合理的横隔面设置会消除局部振型过早出现。同时，风振动力响应对比分析也表明：合理的横隔面设置可以使输电塔斜撑的面外变形和内力大大降低，从而提高输电塔的抗风性能。研究结果表明：目前高压输电塔抗风设计规范中的横隔面设置方法是有待改进的。

英文摘要：

In order to maintain the global stability, to distribute shear, and to resist torsion effects, diaphragms with some intervals are required in designing transmission towers. The arrangements of diaphragms have significant effects on the wind resistance of structures. On the basis of the finite element modeling of a 500 kV double circuit suspension tower which follows the current design code, we analyzes the dynamic responses of tower-line coupling system with different diaphragm arrangements subjected to wind loads. Model analysis results of the two different coupling systems show that the system with inappropriate diaphragm arrangements has severe local vibration modes in the first several modes; however, the counterpart shows that the local modes were successfully suppressed. Dynamic response comparison of the two coupling systems subjected to wind also reveals that the out-of-plane deformation and stresses of the diagonal braces in the tower with appropriate diaphragm arrangements are remarkably decreased. The results show that the current design code for transmission tower needs to be upgraded to consider adding more diaphragms at critical locations to ensure the global stability.