层间连续条件对沥青路面动力特性影响的研究

Influence of Interlayer Continuity Conditions on the Dynamic Characteristics of Asphalt Pavement

沥青路面结构由于各结构层间材料性能存在差异且施工技术水平存在限制,路面结构在使用过程中层间接触条件并非完全连续,但在沥青路面设计时仍将其视为完全连续。为探究层间接触状态对沥青路面动力特性的影响,利用积分变换将偏微分方程组转化为常微分方程组并建立传递矩阵,引入转换矩阵表征层间连续状态;依据边界条件和两类积分逆变换获得层间非完全连续沥青路面结构动力响应的解析解;通过参数变化模拟层间接触状态的改变,分析层间接触状态对路面结构动力响应的影响。计算结果表明:面层与基层间的接触条件对路表弯沉的计算结果影响最大,提高面层与基层间的层间黏结强度可有效降低沥青路面的弯沉响应。

Due to the differences in material properties between different structural layers and the limitations of construction technology,the interlayer contact conditions between layers of asphalt pavement structures are not completely continuous during use,but they are still considered fully continuous in the design of asphalt pavement.In order to explore the influence of interlayer contact state on the dynamic characteristics of asphalt pavement,the partial differential equations were firstly transformed into ordinary differential equations by using integral transformation,and a transfer matrix was established and introduced to characterize the interlayer continuous state.Then,based on boundary conditions and two types of integral inverse transformations,an analytical solution for the dynamic response of interlayer non-fully continuous asphalt pavement structures was obtained.Finally,the change in interlayer contact state was simulated through parameter changes,and the impact of interlayer contact state on the dynamic response of the pavement structure was analyzed.The calculation results show that the contact conditions between the surface layer and the base layer have the greatest impact on the calculation results of road surface deflection.Improving the interlayer bonding strength between the surface layer and the base layer can effectively reduce the deflection response of asphalt pavement.