轮胎接触压力对沥青路面结构的影响

Effects of tire contact pressure on asphalt pavement structure

轮胎与路面间接触压力具有很明显的非均布性,根据轮胎胎面花纹的类型,提出轮胎对路面作用的荷载简化模型,并利用有限元计算分析不同荷载作用下的沥青路面结构响应,并与利用多层弹性层状体系理论计算双圆均布垂直荷载作用下的沥青路面的应力及弯沉进行了对比。结果表明:轮胎与路面接触面的局部区域内,不同荷载模式的影响相当大,这对进一步解释路面面层的一些破坏现象提供了有益的参考。

The interfacial pressure between tire and the pavement exhibits a highly non-uniform distribution over the contact area.On the basis of abundant literature,simplified load models were put forward according to the tire tread patterns. The pavement response under the simplified load models was obtained through finite-element method. Comparison has been made between the pavement response under non-uniformly distributed loadings and the pavement response under the circular uniformly distributed loading by means of multi-layer elastic system theory. The results show that the influence of different load models is remarkable near the contact area.These results may be a possible explanation of near-surface pavement distress evolution in asphalt pavement.