上海交通大学学报

上海交通大学学报（自然版） ›› 2011, Vol. 45 ›› Issue (05): 662-666.

• 交通运输 • 上一篇    下一篇

不同轴载和行车状态下永久性沥青路面的力学响应规律

 李婷婷1, 2   

  1. (1. 长安大学 公路学院， 陕西 西安 710019；2. 陕西交通职业技术学院 公路工程系， 陕西 西安 710072)
  • 收稿日期:2010-10-15 出版日期:2011-05-30 发布日期:2011-05-30

Dynamics Response Characteristics of LongLife Asphalt Pavement  under Different Axial Load and Movement State

 LI  Ting-Ting-1, 2   

  1. (1. Highway School, Chang’an University, Xi’an 710019, China； 2. Department of  Highway Engineering, Shaanxi College of Communication Technology, Xi’an 710072, China)
  • Received:2010-10-15 Online:2011-05-30 Published:2011-05-30

摘要： 基于永久性路面的典型功能层结构，建立了三维力学模型，综合考虑了小、中、大3种车载类型，使用双轮双圆载荷法设定轴载当量，并引入匀速和刹车2种行车状态，利用数值模拟方法分析模型路表面及深层内的应力、应变和位移等的变化规律.结果表明：路表面拉应变和应力主要集中于荷载圆边缘附近，而路面弯沉在荷载圆内达到最大值；刹车引入的剪切力使得荷载圆边缘的应力和应变更为集中，但其影响范围很小，拉应变基本不受影响，且水平位移迅速减小；轴载当量影响范围较大，对路面弯沉、垂直压应变等力学响应指标具有决定性作用.

关键词: 永久性沥青路面, 刹车, 轴载当量, 水平应力, 拉应变, 路面弯沉

Abstract: Based on the typical construction of long-life asphalt pavement, a simplified three-dimensional dynamics model was built up. The axial loads of light, middle and heavy type of vehicles were considered. Numerical simulation was applied to study the response of dynamics parameters in the function layers with inducting the movement state of steady or brake. The computational results show that the horizontal stress and strain are concentrated near the edge of the load circle, while the vertical displacement occurrs inside the load circle. The horizontal load induced by brake will enhance the concentrating of horizontal stress and strain, but its effect on vertical strain and displacement is limited. The vertical load is the most important factor to test the performance of the pavement, which plays dominate role in determining vertical strain and displacement.

Key words:  long-life asphalt pavement, brake, axial load, horizontal stress, horizontal strain, vertical displacement

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