岩土力学2017，Vol.38Issue(6)：1639-1646,8.DOI:10.16285/j.rsm.2017.06.012
基于非线性破坏准则的临坡地基承载力上限分析
Upper bound solution for ultimate bearing capacity of ground adjacent to slope based on nonlinear failure criterion
摘要
Abstract
The determination of ultimate bearing capacity of foundation near slope is an important subject for foundation design.Bearing capacity of ground is conventionally calculated using linear Mohr-Coulomb failure criterion.However,measured data show that the strength envelopes of geomaterials are nonlinear.In this paper,the upper bound theorem of limit analysis with nonlinear failure criterion and a multi-tangential technique were employed to evaluate the bearing capacity of strip footings adjacent to slope.The unilateral rigid blocks sliding mode of strip footings adjacent to slope was considered according to the characteristics of the asymmetry failure mode.The velocity comparability and plastic flow rule satisfy the corresponding velocity field.A mobile permissible velocity field and the ultimate bearing capacity calculation formula of strip footings adjacent to slope were developed.A new method of determining ultimate bearing capacity of strip footings near slope was implemented using sequential quadratic programming optimization algorithm.The proposed method shows superior to other existing methods.The feasibility,rationality and universal applicability of the approach verified by comparison and analysis with current research results.Nonlinear failure parameter significantly impacts the bearing capacity.The rigorous multi-tangential technique method optimum calculated results.关键词
临坡地基/非线性破坏准则/上限极限分析/极限承载能力/多切线法/优化Key words
ground adjacent to slope/nonlinear failure criterion/upper limit analysis/ultimate bearing capacity/multi-tangential technique method/optimization分类
建筑与水利引用本文复制引用
胡卫东,曹文贵,袁青松..基于非线性破坏准则的临坡地基承载力上限分析[J].岩土力学,2017,38(6):1639-1646,8.基金项目
国家自然科学基金项目(No.51378198) （No.51378198）
高等学校博士学科点专项科研基金项目(No.20130161110017).This work was supported by the National Natural Science Foundation of China (51378198) and the Research Fund for the Doctoral Program of Higher Education of China (20130161110017). （No.20130161110017）
