考虑地基固结和流变的上部结构和地基基础的共同作用问题

Analysis for Interaction between Superstructure, Raft and Foundation Considering Consolidation and Creep Settlement

本文提出了一种能同时考虑地基的瞬时变形、固结变形和流变的地基基础与上部结构共同作用的一种新的计算方法。在这种方法中,土的计算考虑了Biot固结理论和流变。上部结构利用子结构法进行凝聚可得边界刚度矩阵和边界力;利用位移协调条件则可以得到共同作用的控制方程。对上述方程进行Laplace变换,可以得到Laplace变换域内的控制方程;在Laplace变换域内对上述方程进行数值求解并进行相应的Laplace逆变换则可以得到时间域内任意时刻的解。

A new method for calculating the immediate, consolidation and creep settlement of foundation simultaneously is presented in this paper. This new method can analyze the interaction between the frame structure and the foundation for 3-D problem. In this problem, foundation is elastic and creeping media, raft and frame is elastic. The govering equations can be obtained, by using the substructure method, Biot consolidation theory and rheology. Using Laplace transforms, the above mentioned governing equations can be converted into transformed domain. The transformed domain solutions of the governing equations can be got through numerical method and the time domain solutions can be obtained by the inverse Laplace transform.