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为研究桩基－非线性框剪结构相互作用体系的地震反应，需要求解群桩基础的动力阻抗函数。本文利用单桩阻抗和群桩动力相互作用因子计算群桩动力阻抗函数，计算并讨论了不同构形群桩阻抗函数在软、中和硬土地基中的变化规律和特点。研究表明：群桩阻抗表现出很强的频率相关性，随土体剪切波速的增大，群桩阻抗有较大幅度的增加，但土体剪切波速的变化对群桩效率（规格化阻抗函数）影响不大．
In order to study the seismic response of a pile-necked frame-shear structure interaction system, the dynamic impedance function of the group pile foundation needs to be solved. In this paper, the dynamic impedance function of the pile group is calculated using the impedance of a single pile and the dynamic interaction factor of the pile group. The variation law and characteristics of the impedance function of pile groups with different configurations in soft, medium and hard soils are calculated and discussed. The research shows that the impedance of the pile group shows a strong frequency correlation. With the increase of the shear wave speed of the soil, the impedance of the pile group increases significantly, but the variation of shear wave speed in the soil affects the efficiency of the pile group (normalization The impedance function) has little effect.