考虑材料软化特性的地基承载力分析计算

Computation and analysis on bearing capacity of foundation with strain-softening behavior

用应力一次跌落软化模型来模拟土体应力应变软化关系曲线，分析了该模型下半无限平面应变土体的承载力。采用特征线和边界单元混合法计算地基承载力。计算结果与Ｐｒａｎｄｔｌ理论解及前人成果比较表明，该模型和算法是合理正确的。

In this paper the problem of the foundation bearing capacity of semi-infinite plane strain soil body is analyzed with the use of stress-dropping strain-softening model,which is used to simulate the stress-strain-softening relation of soil.The computation of the bearing capacity is finished with the mixed use of characteristic curves method and boundary elements method.It is shown that both the model and algorithm is reasonable and correct by comparing the results with Prandtl's solution and other computational results.