中文摘要：

对基于失效模式的输电塔进行优化设计。首先,由完全气弹风洞试验处理得到等效静力风荷载。其次,寻找失效模式以及失效路径上的关键杆件。最后,对不符合承载力要求的失效模式通过加强关键杆件的方法进行优化。研究结果表明：在完整失效路径上存在关键的破坏杆件,对关键杆件进行优化可以有效地提高结构承载力;基于失效模式的优化是一种直接消除薄弱点的优化,优化效果较好;优化结果能达到目标可靠指标的要求;随风速的增大,优化的效率有所降低。

英文摘要：

The transmission line tower based on failure modes was optimally by designed. First, equivalent static wind loads was calculated based on the data from the wind tunnel tests of full aero-elastic model. Then the failure modes and their key elements were identified. At last, those failure modes with inadequate bearing capacity were found and their key elements were strengthened to improve the bearing capacity of the tower. The results show that there is key element in the whole failure path, and the structure will be well strengthened when the key element is strengthened; In the method, the weak points are eliminated directly to strengthen the whole structure and the optimization effect is very good and can meet the target reliability index. As the wind speed increases, the optimization effect decreases.