河北工业科技2017，Vol.34Issue(4)：259-264,6.DOI:10.7535/hbgykj.2017yx04005
基于非线性破坏准则的地基临界荷载计算
Critical load calculation of foundation based on nonlinear failure criterion
摘要
Abstract
In order to calculate the critical load of strip footing under a nonlinear Mohr-Coulomb failure criterion, the variables ct and φt are created by a generalized tangential technique, the equilibrium equation of total stress at any point in the foundation is established according to the limit equilibrium condition of subsoil, and a iterative calculation method of critical load p1/4 of the foundation is presented.Through an sample, the effect of different m on the critical load of the foundation when the strength parameters σt, c0 and footing embedded depth d take different values is calculated.The results show that nonlinear failure criterion has important influence on the critical load and the location of plastic zone in the foundation.Using nonlinear Mohr-Coulomb failure criterion could decrease the calculated value of the critical load, and the location of plastic zone of the foundation is closer to the center line when zmax=b/4.The introduction of nonlinear failure criterion can better conform to the foundation reality and accurately evaluate the bearing capacity.关键词
地基基础工程/非线性破坏准则/条形基础/临界荷载/塑性区最低点位置/迭代法Key words
ground foundation engineering/nonlinear failure criterion/strip footing/critical load/position of lowest point at plastic zone/iterative method分类
建筑与水利引用本文复制引用
欧阳志,鞠兴华..基于非线性破坏准则的地基临界荷载计算[J].河北工业科技,2017,34(4):259-264,6.基金项目
陕西省教育厅科研项目(15JK1169) （15JK1169）
