行车荷载作用下路基附加应力动态分析

Dynamic Analysis of Additional Stress in Roadbed under Traffic Load

该文在考虑材料动态参数基础上,借助ABAQUS通用有限元软件,建立三维有限元模型,采用动态分析的手段,计算了不同车速下路基竖向附加应力,并与静态分析结果进行了对比。结果表明,采用材料动态参数下,路基内部及顶面竖向应力动态分析值分别高出静载下计算值8%与10%;低车速下路基竖向附加应力偏高;动态分析时间点的选取对附加应力值影响显著。

On the basis of considering the dynamic parameters of material,the article sets up 3D finite element model by the common finite element software of ABAQUS,and computes the additional vertical stresses of roadbed under the different vehicle speeds by the dynamic analysis means and compares the stresses with the static analysis result.The results show that interior and top vertical stress dynamic analysis values of roadbed by using the dynamic parameters of materials are separately 8% and 10% higher than the static load,the additional vertical stress of roadbed is slightly higher under the low vehicle speed,and the different time points of dynamic analysis obviously affect the additional stress value..