上部结构-厚筏基础-土共同作用分析

ANALYSIS OF THE INTERACTION OF SUPERSTRUCTURE, THICK RAFT AND SOIL

采用空间有限元法，就工程中常用的筏式基础在考虑上部结构及土介质三者共同作用条件下的性状进行了探讨。着重分析了筏基刚度变化对整个系统内力场和位移场的影响。筏基采用可考虑横向剪切变形影响的厚板协调单元，地基采用分层模型。运用所编程序，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 analyzing the feature of the raft considering the interaction of the space frame, foundation and soil medium. The effect of change of the raft stiffness on the stress field and displacement field in the whole system is analyzed emphatically . In order to evaluate the shear strain, a type of compatible cell — a thick plate cell is proposed . The finite layer model is used because the soil is layered. A typical engineering sample is illustrated using the coded program. Some useful and interesting results for the practical design are obtained .