【摘要】 海上风电结构可能对长周期地震动较为敏感，因此及时掌握海上风电结构的安全状况是十分必要的.在考虑桩土地基与海上升压站结构相互作用的基础上，首先利用ABAQUS有限元软件建立了桩土地基-海上升压站的整体有限元模型，然后将地震动的位移时程和速度时程转化为等效节点力作为地震动的输入，对比分析了某海上升压站结构在长周期地震动和普通地震动作用下的动力响应特征.研究结果表明：长周期地震动作用下海上升压站结构的基底剪力、层间剪力、楼层位移均显著大于普通地震动的作用结果；近场长周期地震动作用下海上升压站结构的基底剪力、层间剪力和楼层位移普遍大于远场长周期地震动的作用结果 .因此，在海上升压站结构的抗震设计中不能忽视对长周期地震动的考虑.更多还原

【Abstract】 Offshore wind power structures may be sensitive to long-period ground motion,so it is necessary to keep abreast of the safety status of offshore wind power structures. Based on the consideration of the interaction between pile-soil foundation and offshore substation,ABAQUS finite element software is used to establish the overall finite element model of pile-soil foundation and offshore substation. Then the displacement time history and velocity time history of ground motion are converted into equivalent nodal forces as the input of ground motion,and the dynamic response characteristics of an offshore substation structure under long-period ground motion and ordinary ground motion are compared and analyzed. The results show that the base shear,interlayer shear and floor displacement of the offshore substation structure under long-period ground motion are significantly increasing compared with ordinary ground motion. The base shear,interlayer shear and floor displacement of the offshore substation structure under nearfield long-period ground motion are generally greater than the results under far-field long-period ground motion.Therefore,the consideration of long-period ground motion cannot be ignored in the seismic design of the structure of the offshore substation.更多还原