子域样条有限元与无限元耦合法分析相邻建筑物的相互作用

THE SPLINE FINITE ELEMENT AND THE INFINITE ELEMENT ANALYSIS OF INTERACTION SYSTEM FOR NEIGHORING BUILDINGS

运用惯性耦合法分析地基上相邻建筑物的相互作用，并将样条有限元法分析直接承受建筑物的桩基和土体，用半解析无限元法分析外围半无限土体．此方法不仅具有输入数据少，计算工作量小，并且避免了人为有限边界的影响．数值计算表明，当两结构相邻较近时，单体与双体在自振特性，尤其在位移、基底总剪力等方面均有差异．

n this paper, the inertia coupling method is applied to analyze the interaction of complicated systems. The spline finite element method is used to investigate the pile-soil system in the near field. The semi-analytical infinite element is introduced to analyse the semi-infinite soil in the far field. Compared with other methods, the presented method not only has the advantage of less input data, less amount of computation and more satisfactory precision, but also avoids the influence of artificial finite boundary. It has been shown by numerical examples that the frequency and displacement between a single building and neighboring buildings have obvious difference.