基于ABAQUS的城市道路沥青路面动力响应分析

Dynamic Response Analysis of Urban Road Asphalt Pavement Based on ABAQUS

为了分析动载对沥青路面结构动力特性的影响,提升路面结构设计的合理性,利用ABAQUS有限元软件,分析车速、轴载、路面平整度等因素对车辆-路面耦合作用的影响,结论如下:动载作用下的路面最大竖向压应力比静载大38.37%,动力响应差别明显;平整度C级路面的竖向最大位移相比A级增加18.50%;车速越大,路面压应力与竖向位移越小,相比速度15m/s时的路面应力与位移,速度30m/s时减小8.10%、15.22%;轴重越大,路面各结构层的竖向应力与位移越大,应力增幅排序为上面层>中面层>下面层,竖向位移增幅排序为中面层>上面层>下面层。

In order to analyze the influence of dynamic load on the dynamic characteristics of asphalt pavement structure and improve the rationality of pavement structure design,ABAQUS finite element software is used to analyze the influence of factors such as vehicle speed,axle load and pavement smoothness on the vehicle-pavement coupling effect.The conclusions are as follows:under the dynamic loading,the maximum vertical compressive stress on the pavement is 38.37%higher than under static loading,and the dynamic response is significantly different.Compared with Grade A pavement,the maximum vertical displacement of Grade C pavement increases by 18.50%.The higher the speed is,the smaller the compressive stress and vertical displacement of pavement is.Compared with the pavement stress and displacement at a speed of 15 m/s,it decreases by 8.10%and 15.22%when the speed is 30 m/s.The greater the axle load,the greater the vertical stress and displacement of each structural layer of pavement.The stress amplification order is top layer>middle layer>bottom layer,while the vertical displacement amplification order is middle layer>top layer>bottom layer.