基于高频天平测力试验的输电塔风荷载空间分布估计

风荷载是输电塔的主要控制荷载，准确地了解风荷载在输电塔上的空间分布，对输电塔的抗风研究具有重要的工程意义。高频动态天平测力试验具有模型制作简单、试验方便等优点，被广泛用于高耸结构抗风研究中。本文利用高频动态测力天平基本原理，在脉动风荷载准定常假设的基础上，估计出输电塔脉动风荷载的空间分布。通过对建设中的ZVK塔的试验研究，验证本方法的有效性。计算结果表明，该方法能较好反应风荷载空间分布特性，是对高频天平测力实验局限性的一种可靠方便的扩展。

Spatial Distribution of Wind Loads on Transmission Tower Based on High Frequency Force Balance Tests

The wind load is a major load on transmission tower. It is considerable necessity for the transmission tower on the wind engineering study that accurately understands the wind loads spatial distribution. High frequency force balance (HFFB) technique is widely used in wind tunnel researches on tall buildings by virtue of its conveniences and simplicities in modeling and testing. According to the deficiencies in HFFB technique and quasi-steady suppose of the pulse wind, a method for simulating spatially distributed wind forces acting on transmission tower is presented. Through the research on the ZVK tower being constructed, verify the precision of the method. The results show that the method is able to response the wind load spatial distribution characteristics of the transmission tower. And the method can extend the application of HFFB technique in the wind tunnel tests.