The steel–concrete hybrid wind turbine tower is characterized by the concrete tubular segment at the lower part and the traditional steel tubular segment at the upper part. Because of the great change of mass and stiffness along the height of the tower at the connection of steel segment and concrete segment, its dynamic responses under seismic ground motions are significantly different from those of the traditional steel tubular wind turbine tower. Two detailed finite element models of a full steel tubular tower and a steel–concrete hybrid tower for 2.0 MW wind turbine built in the same wind farm are, respectively, developed by using the finite element software ABAQUS. The response spectrum method is applied to analyze the seismic action effects of these two towers under three different ground types. Three groups of ground motions corresponding to three ground types are used to analyze the dynamic response of the steel–concrete hybrid tower by the nonlinear time history method. The numerical results show that the seismic action effect by the response spectrum method is lower than those by the nonlinear time history method. And then it can be concluded that the response spectrum method is not suitable for calculating the seismic action effects of the steel–concrete hybrid tower directly and the time history analyses should be a necessary supplement for its seismic design. The first three modes have obvious contributions on the dynamic response of the steel–concrete hybrid tower.

钢混混凝土风力发电机塔架的特点是下部为混凝土管状段，上部为传统钢管段。由于在钢段和混凝土段的连接处，沿塔架高度的质量和刚度变化很大，因此其在地震地震动下的动力响应与传统的钢管风轮机塔架明显不同。使用有限元软件ABAQUS分别开发了两个完整的钢管塔和在同一风电场中建造的2.0兆瓦风力涡轮机的钢-混凝土混合塔的有限元模型。应用响应谱法分析了这两种塔在三种不同地面类型下的地震作用效果。对应于三种地面类型的三组地面运动被用于通过非线性时程分析法来分析钢-混凝土混合动力塔的动力响应。数值结果表明，响应谱法的地震作用效应低于非线性时程法的地震作用效应。然后可以得出结论，响应谱法不适用于直接计算钢-混凝土混合塔的地震作用效果，时程分析应作为其抗震设计的必要补充。前三种模式对钢混凝土混合动力塔的动力响应具有明显的贡献。数值结果表明，响应谱法的地震作用效应低于非线性时程法的地震作用效应。然后可以得出结论，响应谱法不适用于直接计算钢-混凝土混合塔的地震作用效果，时程分析应作为其抗震设计的必要补充。前三种模式对钢混凝土混合动力塔的动力响应具有明显的贡献。数值结果表明，响应谱法的地震作用效应低于非线性时程法的地震作用效应。然后可以得出结论，响应谱法不适用于直接计算钢-混凝土混合塔的地震作用效果，时程分析应作为其抗震设计的必要补充。前三种模式对钢混凝土混合动力塔的动力响应具有明显的贡献。然后可以得出结论，响应谱法不适用于直接计算钢-混凝土混合塔的地震作用效果，时程分析应作为其抗震设计的必要补充。前三种模式对钢-混凝土混合动力塔的动力响应具有明显的贡献。然后可以得出结论，响应谱法不适用于直接计算钢-混凝土混合塔的地震作用效果，时程分析应作为其抗震设计的必要补充。前三种模式对钢混凝土混合动力塔的动力响应具有明显的贡献。