土—结动力相互作用研究

Study on Soil-structure Interaction

本文用行波的观点 ,以集中质量显式有限单元法结合局部透射人工边界 ,详细论述了在时域内分析土—结相互作用问题的计算方法 ,同时还给出了工程实用的土体离散化准则及抑制高频失稳的措施。最后 ,针对计算模型 ,在坚硬地基与软土地基条件下用自编的 3DSSI程序进行了土—结相互作用分析 ,通过比较研究不仅验证了本程序的正确性 ,还得出了一些有益的结论。

In this thesis, based on the theory of wave propagation and the method of lumped-mass explicit finite element and local transmitting artificial boundary, the method of analysing soil-structure interaction (SSI) is elaborated in detail. Meanwhile, a useful discretization rule in engineering and a way suppressing lost stability at high frequency are suggested. At last, SSI is studied with a simplified model under the conditions of rigid site and soft site by use of 3DSSI programmed by myself that is tested precisely.And I have drawn some useful conclusions.