沥青混合料的材料特性对沥青路面力学响应的影响  

Effect of Material Characteristics of Asphalt Mixture on Mechanical Response of Asphalt Pavement

作　　者：祁文洋[1] 孔晨光 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804 [2]山东高速股份有限公司,济南250000

出　　处：《石油沥青》2014年第3期36-39,共4页Petroleum Asphalt

摘　　要：为了给沥青路面结构的分析与设计提供参考,采用三维有限元仿真分析方法,在弹性假设下以渗透系数、阻尼系数及横观各向同性系数分别表征沥青混合料的多孔介质、阻尼及横观各向同性特性。分析了不同沥青混合料材料特性对典型沥青路面结构力学响应的影响,并对结果进行了比较。结果表明:考虑阻尼特性时,半刚性基层及柔性基层沥青路面面层层底拉应变设计标准偏于危险;考虑多孔介质特性时,柔性基层沥青路面面层层底拉应变设计标准偏于危险;考虑横观各向同性特性时,半刚性基层及柔性基层沥青路面路基顶面竖向压应变设计标准偏于危险。In order to provide reference for the analysis and design of the asphalt pavement, mechanical responses of typical asphalt pavement stuctures were analyzed using three - dimensional finite element method. The characteristics of asphalt mixtures were considered by taking coefficient of permeability, damping coefficient and Transverse isotropic coefficient as the indexes. The results showed that when considering the damping characteristic, the currently - adopted design standard of asphalt layer bottom tensile strain in both semi - rigid base and flexible base asphalt pavement was comparably insecure; when considering the porous media characteristic, the currently -adopted design standard of asphalt layer bottom tensile strain in flexible base asphalt pavement was comparably insecure; when considering the transverse isotropic characteristic, the currently -adopted design standard of subgrade top compressive strain in both semi - rigid base and flexible base asphaltpavement was comparably insecure.

关 键 词：道路工程 沥青路面 沥青混合料 材料特性 力学响应 有限元 

分 类 号：U416.217[交通运输工程—道路与铁道工程]