摘要
随着公路的运行和运输量快速增长,由于路面不平,车辆荷载对路面产生的振动对路面的损害越来越严重,通过移动荷载简化后建立了三维沥青路面有限元动力模型,研究了移动荷载作用下沥青路面各层结构内的竖向位移变化,同时对横向、纵向、竖向三向下的动应力进行了分析。表明,沥青路面累积效应呈现扩大态势,沥青路面结构的竖向压缩变形几率增大;面层和基层作用下有效降低了竖向土压力,提高了路基层结构的承载力;沥青路面各结构层在横向既受拉又受压。
with the rapid growth of highway operation and transportation,the damage to pavement caused by vehicle load on pavement is becoming more and more serious because of uneven pavement.This paper has established a finite element dynamic model of three-dimensional asphalt pavement after simplification of moving load,and studied the vertical of the structure of each layer of asphalt pavement under the action of moving load.The three downward dynamic stresses in lateral,vertical and vertical directions are also analyzed.It shows that the cumulative effect of asphalt pavement is expanded,the probability of vertical compression deformation of asphalt pavement structure increases,the vertical soil pressure is reduced effectively under the surface and base level,and the bearing capacity of the road base structure is improved,and the structure layers of asphalt pavement are both drawn and compressed horizontally.
作者
于瑞尚
YU Rui-shang(The Xinjiang Uygur Autonomous Region Forestry Planning Institute,Xinjiang Urumqi 830049 China)
