柔性基层路面裂缝对结构层材料模量的敏感性分析

Sensitivity Analysis of Flexible Base Pavement Cracks to Material Modulus of Structural Layer

为了分析柔性基层路面裂缝对结构层材料模量的敏感性,应用有限元软件ABAQUS建立了含表面裂缝的路面模型,分析了裂缝尖端应力场在不同路面结构层模量下的敏感性。结合模拟成果可知:柔性基层路面表面裂缝尖端应力应变弹性场对面层模量和土基模量的敏感性较强。在柔性基层路面设计时,应在满足规范的前提下适当的选取结构层模量,从而延缓裂缝的扩展。

In order to analyze the sensitivity of the flexible base pavement cracks to the modulus of the structural layer material, using the finite element software ABAQUS to establish pavement model with surfacecracks, the sensitivity of crack tip stress field under different pavement structure layer modulus is analyzed. Based on the simulation: The stress-strain elastic field at the crack tip of the surface on the flexible base pavement is highly sensitive to the modulus of the surface layer and the soil foundation. In the design of flexible base pavement, the structural layer modulus should be appropriately selected on the premise of meeting the specifications, so as to delay the crack expansion.