Abstract In establishing the numerical model to simulate the saturated soil-structure interaction subjected to dynamic loadings, the absorbing boundary conditions are usually applied to simulate the wave propagation in the field. In this study, a type of viscous boundary in conjunction with the domain reduction method (DRM) is proposed as an advanced absorbing boundary. The performance of this advanced absorbing boundary is examined by comparing the seismic responses of rectangular tunnel modeled with different boundary conditions in FLAC3D. The numerical results suggest that the advanced absorbing boundary has advantages over the other types of boundaries in minimizing the wave reflection at the numerical boundaries. Furthermore, the proposed advanced absorbing boundary is also employed for the seismic investigation of clay-pile systems, the results of which compare favorably well with the corresponding seismic centrifuge test results. The numerical analysis results indicate that the advanced absorbing boundary proposed in this study can be effectively employed for the efficient dynamic analysis of structures founded on the saturated porous media.

中文翻译：

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用于饱和多孔介质中波传播分析的高级吸收边界

摘要 在建立动力荷载作用下饱和土-结构相互作用的数值模型时，通常采用吸收边界条件来模拟现场波的传播。在本研究中，提出了一种结合域缩减方法 (DRM) 的粘性边界作为高级吸收边界。通过比较在 FLAC3D 中使用不同边界条件建模的矩形隧道的地震响应来检查这种高级吸收边界的性能。数值结果表明，高级吸收边界在最小化数值边界处的波反射方面优于其他类型的边界。此外，提议的高级吸收边界也用于粘土桩系统的地震调查，其结果与相应的地震离心机试验结果相媲美。数值分析结果表明，本研究提出的超前吸收边界可以有效地用于基于饱和多孔介质的结构的高效动力分析。