A series of large‐scale shaking table tests are conducted on tall buildings with and without energy dissipation devices on soft soils in pile group foundations, representing pile‐soil‐structure interaction (PSSI) system and the corresponding fixed‐base situations. The superstructure is a 12‐story reinforced concrete (RC) frame. The dynamic characteristics of the test models show that the frequencies decrease and the damping ratio increase in PSSI system by comparison with the fixed‐base structures. The mode shapes of PSSI system are different from that under fixed‐base condition, and the mode shapes of structure without dampers change greater than that with energy dissipation devices under various white noises. An improved method for structural dynamic characteristics, considering the impedance function of piles, is developed to address the issue of modal parameters with PSSI effect. In addition, the structural dynamic parameters of the large‐scale shaking table tests are identified using the modification method and other regulation methods, demonstrating that the improved approach is highly accurate and effective. Subsequently, a design procedure for viscous dampers of structures with PSSI effect is presented based on the dynamic characteristics of the system. Finally, the dynamic responses of the structure with viscous dampers in the practical engineering are decreased effectively, indicating the good performance of designed viscous dampers. The numerical results also show that the damping efficiency of interstory drift is larger than the acceleration and interstory shear force. Therefore, the improved modal parameters method, validated through a series large‐scale shaking table tests, is applicable for identifying dynamic characteristics of pile‐soil‐structure with energy dissipation devices system. The design procedure of viscous dampers, proved by a reinforced concrete frame structure located on a practical Shanghai soft site, can be employed to design the viscous dampers considering seismic PSSI effect.

中文翻译：

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桩-土-结构系统的动力特性和粘性阻尼器设计

在桩基基础上的软土地基上，在有无消音装置的高层建筑上进行了一系列大型振动台测试，分别代表了桩-土-结构相互作用（PSSI）系统和相应的固定基础情况。上层建筑为12层钢筋混凝土（RC）框架。测试模型的动态特性表明，与固定基础结构相比，PSSI系统的频率降低，阻尼比提高。PSSI系统的模态形状与固定基础条件下的模态形状不同，在各种白噪声下，不带阻尼器的结构的模态形状变化大于带消能器的结构。考虑桩的阻抗函数的结构动力特性的改进方法，开发用于解决具有PSSI效应的模态参数的问题。此外，使用修正方法和其他调节方法确定了大型振动台试验的结构动力学参数，这表明改进的方法是高度准确和有效的。随后，根据系统的动态特性，提出了具有PSSI效应的结构粘性阻尼器的设计程序。最后，在实际工程中有效降低了带有粘性阻尼器的结构的动力响应，表明所设计的粘性阻尼器具有良好的性能。数值结果还表明，层间位移的阻尼效率大于加速度和层间剪切力。因此，改进的模态参数法 经过一系列大型振动台试验验证，适用于识别带耗能装置系统的桩土结构动力特性。粘滞阻尼器的设计过程由位于上海某实际工地的钢筋混凝土框架结构证明，可以考虑地震PSSI效应来设计粘滞阻尼器。