摘要
由地基土重量引起的地基承载力系数N_γ的真实解答至今尚未获取．本文根据极限分析法与极限平衡法的等效性，构造出最危险的运动许可滑动机构，得出N_γ尽可能小的上限解．分别定量分析了在荷载倾斜、基底倾斜、地表倾斜对N_γ的影响，提出了近似影响系数公式，并与现有研究结果进行比较．
The true solution for the bearing capacity factor, Nγ, due to soil self-weight has not been assessed, By use of equivalence of limit analysis method and limit equilibrium method, the most dangerous kinematically admissible failnre mechanism is elaborately constructed, resulting in the upper-bound solution for N. as low as possible. The effects on Nγ of the inclinations of load, footing base and ground surfaCe have been evaluated. Approximate closed-form expressions for these modifiers are suggested and comparisons are made with current solutions.
出处
《力学与实践》
CSCD
北大核心
1999年第4期24-27,共4页
Mechanics in Engineering
关键词
地基承载力
极限分析
极限平衡
上限解
bearing capacity of footing, limit analysis,limit equilibrium, upper-bound solution
