您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第14卷    第2期    总第83期    2017年2月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7029(2017)02-0233-08
条形基础地基极限承载力的改进径向移动算法研究
金亮星,潘卓夫,冯琦璇

(中南大学 土木工程学院,湖南 长沙 410075)

摘 要: 基于极限分析法,在将地基划分成刚塑性三角形块的基础上,综合考虑地下水位和非饱和土基质吸力的影响,利用内外虚功率相等原理建立极限承载力的求解方程,从而将条形基础地基极限承载力问题等价为一个边界待定的泛函极值问题。在将径向移动算法的数据结构进行改进之后用于对地基滑移线的搜索与相应极限承载力的计算,并在此基础上研究地基土层参数、基质吸力与地下水位对地基极限承载力的耦合影响。结果表明,改进的径向移动算法能快速准确而稳定地搜索滑移线并求解地基极限承载力;各地基参数变化会对地基极限承载力产生不同的耦合影响。

 

关键字: 地基极限承载力;非饱和土;基质吸力;条形基础;径向移动算法

The research of ultimate bearing capacity for strip foundation with improved radial moving optimization
JIN Liangxing, PAN Zhuofu, FENG Qixuan

School of Civil Engineering, Central South University, Changsha 410083, China

Abstract:On the basis of limit analysis method and the division of the foundation into rigid-plastic triangular blocks and considering the effect of the groundwater level and matric suction for unsaturated soil, the solve equation was established using the same virtual power inside and outside. Then the ultimate bearing capacity of strip foundation was equivalent to a functional extreme value problem with unknow boundary. After improved the data structure, the radial movement optimization was used to search the foundation slip line and calculate the corresponding ultimate bearing capacity. On this basis, the relationship among the ultimate bearing capacity of the foundation and parameters of the foundation soil, matric suction, groundwater level could be further studied. The results show that the improved radial movement optimization can quickly and accurately search the slip line and solve the ultimate bearing capacity of the foundation. The foundation parameters show different influences with the ultimate bearing capacity.

 

Key words: ultimate bearing capacity of foundation; unsaturated soils; matric suction; strip foundation; radial movement optimization

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn