结构间距对软土地基群体效应的影响分析  

Influence of Structure Intervals on Group Effect of Soft Soil Ground

作　　者：杨震[1] 李培振[1] 曹圣路 

机构地区：[1]同济大学结构工程与防灾研究所,上海200092

出　　处：《佳木斯大学学报（自然科学版）》2016年第2期190-192,共3页Journal of Jiamusi University：Natural Science Edition

基　　金：国家自然科学基金项目(51178349)

摘　　要：采用通用有限元分析软件ANSYS对结构-土-结构动力相互作用体系进行了三维有限元模拟,并总结了软土地基群体效应体系的有限元建模与分析方法.通过改变结构之间的距离研究了结构间距对群体效应的影响,并得出了以下结论:结构间距对软土地基群体效应影响较为明显,且影响程度随结构间距的减小而增大;当结构间距较小时,中部结构的上部楼层位移在考虑群体效应后会明显增大;当结构间距不小于2倍结构宽度时,群体效应对抗震分析结果的影响较小.The general finite element analysis software ANSYS is used in 3D- FEM simulation of structure- soil- structure interaction system. The finite element modeling and analysis method of group effect system is summarized. The influence of structure intervals on group effect is studied by changing the intervals of structures. Conclusions can be reached as follows： The influence of structure intervals on group effect is significant,and the degree of the influence will increase with the reduction of structure intervals. If the interval of structures is very small,group effect will increase displacements of upper floors of the middle structure. If the interval of structures is not smaller than twice width of the structure,group effect will have little impact on the seismic performance of structures.

关 键 词：群体效应 结构间距 软土地基 有限元 

分 类 号：P315.9[天文地球—地震学]