典型输电塔平均风荷载和响应研究

高耸输电塔所受的风荷载是其结构设计的控制荷载．输电塔为空间桁架结构，塔头结构形式尤其复杂，很难用精确的理论方法对其所受风荷载及响应进行分析．首先介绍了输电塔分段刚性模型的风洞测力试验，随后又建立了输电线路典型设计中最常用的2种输电塔有限元模型，利用风洞试验数据对其进行平均风加载，得到不同情况下2种塔型的位移响应，并对这2种塔型的响应进行了对比和分析，得到了有关典型输电塔结构平均风荷载响应的一些结论．

Response analysis on mean wind force of typical power transmission towers

The wind loading is critical to power transmission tower design. In this manner, the tower is typically designed as a spatial truss structure with a complicatedly-structured top. As such, theoretical methods cannot be accurately applied to analyze the wind loading and its response. In this study, a wind tunnel testing is first proposed using a segmental rigid model of transmission towers. Then, the finite element models are established for two typical tower structures. Next, the wind tunnel testing data are used as mean wind loading, and therein relevant displacement responses are obtained. Afterwards, the response results from two tower structures are analyzed and compared based on the above-mentioned tower structures. Finally, some conclusions are drawn with regard to the response from mean wind loading.