动载作用下加筋土路基的计算模型研究  

The Study of Calculation Model for Reinforced Subgrade on Dynamic Loading

作　　者：凌建明[1] 曾四平[1] 黄琴龙[1] 阙云[1] 王仕传[1] 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海200092

出　　处：《中南公路工程》2007年第2期1-4,18,共5页Central South Highway Engineering

基　　金：交通部西部交通建设科技项目(200431800006)

摘　　要：在前人工作的基础之上提出了一个新的动力荷载作用下加筋土路基的计算模型,该模型的土体采用动载作用下基于SMP(Spatial mobilized Plane)破坏准则的弹塑性动本构关系进行模拟,加筋材料的本构模型采用非线性多项式进行描述,筋土的相互作用采用双弹簧界面模型来模拟。模型中的参数可以通过常规的土工试验获得。基于该模型的数值分析与实测试验值进行了对比,证明了模型的正确性。结果表明,该模型能应用于工程实际。This article proposes a new calculation model for reinforced subgrade on dynamic loading based on previous study. The soil is simulated by elastic-plasticity dynamic constitutive relationship based on SMP（ Spatial mobilized Plane） failure criterion under dynamic loading in this model;and the reinforced material is depicted by a non-linear polynomial. The interaction between soil and reinforced material is simulated by double-spring interface model. The parameters of this model can be obtainedby general geotechnical experiments. The numerical calculation based on this models is compared with onthe-spot experiment. The outcome verifies this modes and indicates that this model can be used to real engineering.

关 键 词：加筋土 动本构模型 双弹簧界面模型 计算模型 

分 类 号：U416.1[交通运输工程—道路与铁道工程]