交通荷载下加筋道路弹黏塑性有限元分析

为了研究交通荷载作用下软基加筋道路的动力响应，提出了一个土体动力弹黏塑性模型来模拟循环荷载作用下加筋道路中软土地基的动力特性，并在土工格栅和土体之间设置接触面单元来模拟筋材与土体的相互作用.在此基础上建立了软基加筋道路的动力分析模型，编制了动荷载作用下加筋软基道路变形分析的计算程序.用该程序对室内试验进行了分析，验证了程序的正确性；并用该程序对在路堤与软土地基之间铺设土工格栅的加筋道路和不加筋道路的动力特性进行了对比分析,同时还对比了考虑流变和不考虑流变的加筋道路的位移响应.结果表明，加筋对软土道路的动力响应有明显影响，同时，考虑软土的流变特性对研究加筋道路的动力响应是非常必要的.

Elasto-viscoplastic FEA of reinforced pavements under traffic loading

A dynamic elasto-viscoplastic model was proposed to simulate the response of clay under cyclic loading and study the dynamic response of reinforced pavements on soft clay under traffic loading.Contact interface elements were used between geogrid and soil for the purpose of modeling the interaction between soil and geogrid.A dynamic finite element model of reinforced pavements was created and finite element program was proposed.The finite element analysis(FEA) results were compared to the observed data from experiment and the validity of the program was verified.Dynamic response contrast analysis of unreinforced and geogrid reinforced pavements was studied in order to investigate reinforcement effect.The influence of rheology on displacement response was also studied.The results showed that reinforcement has obvious effect on the pavement displacement and that it is essential to take into consideration the influence of rheology on the dynamic response of reinforced pavements.