空间框架、十字交叉条形基础和土介质的相互作用分析  

Space frame.grillage foundation and soil medium interactive analysis

作　　者：李志 张季容 姚祖恩 

出　　处：《浙江大学学报（自然科学版）》1995年第3期321-327,共7页

摘　　要：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板组合结构，板采用平板壳元，梁采用空间偏心梁元，用组合结构有限元进行分析；土介质模拟为分层地基．本文基于相互作用的原理，编制了相应的计算程序，针对一典型算例讨论了考虑地基的不均匀沉降后，引起的上部结构内力的调整；考虑上部结构刚度后，引起的基础内力和地基沉降的调整；以及基础梁的偏心对基础内力的影响，得到了一些对工程实践有实用意义的结论．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.

关 键 词：条形基础 组合结构 相互作用 空间框架 

分 类 号：TU471.12[建筑科学—结构工程]