沥青路面加铺层对半刚性基层力学响应影响研究

Research on Influence of Overlay Modification on Mechanical Response of Semi-rigid Pavement Base Material Based on Finite Element Analysis

为明确沥青路面使用加铺层后对半刚性基层材料力学性能的影响,通过建立含加铺层的沥青道路有限元仿真模型,通过数值模拟的方法,研究加铺层结构、弹性模量参数对半刚性基层力学响应的影响规律,为路面加铺层设计提供理论依据。结果表明:加铺层的弹性模量和厚度,对于半刚性基层力学响应具有显著影响,采用合适的加铺层厚度、采用弹性模量适中的沥青材料作为加铺层,可以使半刚性基层具有良好力学特性,延长使用寿命。为此,使用有限元分析方法,研究加铺层对无机结合料稳定类基层力学响应的影响,对延长半刚性基层材料使用寿命,具有一定工程意义。

In order to clarify the influence of asphalt pavement on the mechanical properties of semi-rigid base materials after using overlay,this paper establishes a finite element simulation model of asphalt pavement with overlay,and uses numerical simulation to study the structure of overlay and elastic modulus,This influence law of quantitative parameters on the mechanical response of semi-rigid base layer provides a theoretical basis for the design of pavement overlay.The results show that the elastic modulus and thickness of the overlay have a significant impact on the mechanical response of semi-rigid base.The thickness of the layer and the use of asphalt material with moderate elastic modulus as the overlay layer can make the semi-rigid base layer have good mechanical properties and prolong the service life.In this paper,the finite element analysis method is used to study the influence of the overlay on the mechanical response of the inorganic binder-like stable base,which has certain engineering significance for prolonging the service life of the semi-rigid base material.