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同时考虑了高拱坝地震反应中的两个重要因素，即拱坝—地基动力相互作用和横缝非线性影响，并采用子结构技术加以实现，在拱坝地震反应分析中较以前有重大改进。由边界元—无限边界元耦合模型得到的地基频域动力刚度通过拟合法转换成时域离散参数，得以与拱坝有限元相耦合并在时域中求解。地震输入采用一种简化模型，在考虑无限地基辐射阻尼的同时避免了地震通过基岩后的人为放大。计算表明地基辐射阻尼对拱坝地震反应有显著影响。
At the same time, two important factors in the seismic response of the arch dam, that is, the dynamic interaction between the arch dam and the foundation, and the nonlinear influence of the transverse joint, are considered and realized by the substructure technique. Compared with the previous analysis, the seismic response of the arch dam has been greatly improved . The dynamic stiffness of the foundation in the frequency domain obtained by the coupled boundary-element-infinite boundary element model is transformed into the discrete-time parameters in the time domain by fitting method, which can be coupled with the finite element of the arch dam and solved in the time domain. A simplified model of seismic input is used to avoid the artificial amplification of earthquakes passing through the bedrock while considering the damping of the infinite base radiation. The calculation shows that the radiative damping of foundation has a significant influence on the seismic response of arch dam.