不同路面结构在脉冲荷载下的动力特性

Dynamic characteristics of different pavement structures under impulsive load

省道318山城至书洋段路面大修工程,根据旧路使用情况全线采用打裂压稳后加铺沥青面层改造方式。为了解新旧路面结构在行车荷载作用下的动力特性,本文采用ABAQUS有限元软件,模拟FWD脉冲荷载作用下水泥混凝土路面和旧水泥混凝土路面加铺沥青改建复合路面的弯沉盆及弯沉时程曲线,基于对这两种路面的动力特性分析,提出相应的动力破坏模式。

For the pavement overhaul project of provincial highway 318 from Shancheng to Shuyang,according to the current condition of the old pavement,asphalt surface was paved after cracking and stabilizing of the whole old pavement. In order to acquaintance the dynamic characteristics of old and new pavement structures under vehicle loads,this paper uses the ABAQUS finite element software to simulate the deflection basin and bending of the cement concrete pavement and the old cement concrete pavement overlay asphalt composite pavement under impulsive load of the FWD. Based on the analysis of the dynamic characteristics of the two kinds of pavements,the corresponding dynamic failure modes are proposed.