考虑土-结构相互作用的UHPC混合式风电塔筒动力响应分析OA

To study the influence patterns of soil-structure interaction(SSI)on the dynamic response of ultra-high performance concrete(UHPC)hybrid wind turbine tower,finite element models of the wind turbine tower with and without SSI effects were established for a 5 MW onshore wind turbine struc-ture.Firstly,modal analysis and pushover analysis were performed.Subsequently,nonlinear time his-tory analysis and wind-earthquake coupling analysis were conducted.Finally,the relative tower top displacement,tower top acceleration,and tower stress were taken as the main analysis indicators to evaluate the seismic and wind-earthquake coupling dynamic response of the UHPC hybrid tower.The results were compared with those of the C80 hybrid tower.The results showed that considering SSI ef-fects led to a reduction in the natural frequency of the hybrid wind turbine tower,with greater reduc-tion observed in higher modes.Considering SSI effects reduced the tower base shear,and the UHPC hybrid tower demonstrated stronger load-carrying capacity and collapse resistance.The wind-earth-quake coupling effect on the wind turbine tower was more significant than seismic load alone,with maximum increases in displacement and stress response of 210% and 33%,respectively,compared to seismic load alone.Compared with the C80 hybrid tower,the UHPC hybrid tower exhibited lower rel-ative tower top displacement and less damage,indicating its superiority.The SSI effects significantly impact the dynamic response of the wind turbine tower.Therefore,it is recommended that the SSI ef-fects should be fully considered in the design of large hybrid wind turbine towers in the future to ensure structural safety and reliability.