摘要
采用三种弹塑性模型——剑桥模型(MCC)、三维修正剑桥模型(3DMCC)和考虑各向异性的三维修正剑桥模型(ANIS-MCC),对一假想路堤进行快速加载下的固结变形有限元分析,以考察这三种模型预测结果的区别,为路基变形有限元分析时的本构模型的选取提供依据。研究结果表明,在路基未达到破坏状态以前,三种模型给出的路基变形、孔压消散的规律性基本一致;但当研究分析需要特别提高坡脚位置处地基变形预测精度时,最好采用较为复杂的能够反映土体各向异性屈服特性的模型,如ANIS-MCC模型。
Through the finite element analysis of an imaginary embankment under fast loading, in order to examine the difference of consolidation deformation results predicted by the three plastic-models （MCC, 3DMCC, and ANIS-MCC）. The research results showed that the variation trendeney of the deformation and pore pressure were mainly the same before the destroy of the embankment, however, when it neeessicary, especially to improve the prediction accuracy of the ground deformation at foot, it was best to use the more complex model that could reflact the anisotropic yield characteristics of the soil, such as ANIS-MCC.
出处
《工业建筑》
CSCD
北大核心
2013年第7期76-79,85,共5页
Industrial Construction
基金
国家自然科学基金项目(40702051
50678130)
关键词
弹塑性
各向异性
路基
固结
有限元
elastic-plastic
anisotropy
subgrade
consolidation
FEM
