空间框架,十字交叉条形基础和土介质的相互作用分析

本文将空间框架，十字交叉条形基础和土介质作为一个统一的整体，用有限单元法进行相互作用分析，分析时将空间框架离散为空间梁元，用杆系结构有限元分析，将十字交叉条形基础离散为梁反组合结构，板采用平板壳元，梁采用空间偏心梁元，有组合结构有限元进行分析，土介质模糊为分层地基。

Space frame.grillage foundation and soil medium interactive analysis

In this paper,space frame,grillage foundation and soil medium are treated as parts of a single continuous system and a interactive analysis method is presented using Finite Element Method. In the analysis,space frame is divided in to space beam element;grillage foundation is treated as a composite beam and slab system. The thin shell type element and sPace eccentric beam element are developed. Multilayer soil model has been used in interactive analysis.Based on the principle of interaction between soil and structure,the Finite Element Analysis program ZD--SSIA for space frame,grillage foundation and soil medium interactive analysis has been coded in FORTRAN77.In this paper,a typical grillage foundation is illustrated. Some very interesting results which may be useful in practical design are obtained.