摘要
针对基于SMP准则改进的剑桥模型(MCC-SMP),采用弹性预测和塑性修正两阶段的回映算法,给出了应力更新算法,根据其算法编制了非线性有限元子程序,进行了三轴压缩、三轴伸长及平面应变等单元试验问题的数值模拟,通过数值分析和试验结果的对比,验证了子程序的精度;采用该本构模型,对澳大利亚某试验段路堤软土地基固结进行了三维有限元分析,重点分析和对比了孔压、沉降及水平位移的变化规律。
The Cam-clay model revised by SMP criterion （MCC-SMP） is implemented into a commercial software by using return mapping algorithm based on two-stage schemes, which includes elastic predictor and plastic corrector stages. The algorithm for updating the stress is provided. A subroutine for implementing the algorithm is developed. Numerical simulations of triaxial compression, triaxial tension and plane strain tests are performed. The precision of the algorithm is verified by comparing predicted values with experimental results. By using the MCC-SMP model, three-dimensional finite element analysis of consolidation behavior of trial embankment on soft soil, in Australia, is carried out. The changes in pore pressure, settlement and lateral displacement are analyzed and compared with the observed data in situ.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2009年第3期669-674,共6页
Rock and Soil Mechanics
关键词
回映算法
三维
弹塑性模型
固结
曼德尔效应
return mapping algorithm
three-dimension
elastoplastic model
consolidation
Mandel effect
