【摘要】 针对非均质软黏土地基上复合加载模式下桶形基础的破坏包络面,运用大型有限元分析软件ABAQUS进行了三维非线性数值分析。通过比较系统的数值计算与分析,考察了软黏土非均质性对复合加载模式下桶形基础破坏包络面形状的作用及影响。结果表明:软黏土地基的不排水抗剪强度对于力矩为0的平面内,其应力归一化的破坏包络面影响不大,而在水平荷载与竖向荷载为0的平面内,其应力归一化的破坏包络面具有一定影响。通过与有关模型试验的对比分析,在一定程度上验证了有限元计算模型与数值分析结果的合理性。更多还原

【Abstract】 Three-dimensional nonlinear numerical analysis of failure envelopes of bucket foundation under combined loading in heterogeneous soft clay is presented. The general-purpose finite element software ABAQUS is utilized, and numerical computations are conducted. Through the numerical analysis, the effect of strength heterogeneity of soft clay on failure envelopes of bucket foundation subjected to combined loading is investigated. It is shown that a failure envelope does hold in M=0 plane, but for H=0 and V=0 planes, the overall size of the normalized failure envelopes reduces as the degree of strength heterogeneity increases. For a given model test, the rationality of the numerical results computed by FEM is validated by comparing with experimental data.更多还原