上部结构一厚筏基础一土共同作用分析

Superstructure-Thick Raft-Soil Interaction Analysis

本文采用空间有限元法，就工程中常用的筏式基础在与上都结构及土介质三者共同作用时的性状进行了探讨。重点分析了筏板基础刚度变化对整个系统的影响。考虑到较厚筏基中不可忽略的横向剪切变形的影响，本文采用协调板单元-厚板单元进行分析，同时考虑到上的层状分布及非均质性而采用分层地基模型。作者用Fortran语言编写了程序，并在微机上调试通过。针对一典型算例，分析得出了一些对工程实践十分有用的结论和认识。

In this paper, space finite element method is used for analysing the attribute of raft considering the space fram-foundation-soil medium interaction. The effect of the change of raft stiffness is analysed emphaticaly. In order to evaluate the shear strain, a type of compatible cell-thick plate cell was selected. At thesame time, the finite layer model is used for the layered soil.The finite element analysis program for space fram, raft and soil medium interaction analysis has been coded in FORTRAN. A typical engineering example is illustrated. Some very interesting results which may be useful in practical design are obtained.