路面细观动力学研究

项目名称： 路面细观动力学研究

项目编号： No.11272219

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 郭树起

作者单位： 石家庄铁道大学

项目金额： 86万元

中文摘要： 随着经济高速发展，交通量与轴重逐渐增大，行车速度持续提高，沥青路面常常发生不同程度的早期破坏，影响了交通，产生了巨大的经济损失与安全隐患。现有的路面技术已经不能满足日新月异的道路性能要求，有必要考虑沥青路面在细观结构上的非均匀性与随机性特征。为揭示路面失稳破坏机理、预测路面动力学性能，拟采用细观力学、弹性动力学与有限元法等方法，考虑沥青路面的细观结构，分析计算沥青混合料细观结构与宏观动力学性能之间关系，研究细观结构参数对动态有效弹性模量与热弹性性能的影响。研究在温度场与车辆荷载联合作用下，细观结构对路面动力学性能的影响。考虑材料的粘弹性特性，研究路面在动力荷载下失稳破坏的微观机理，分析车辆荷载、温度、路面细观结构等因素对失稳破坏的影响。

中文关键词： 非均质材料；级数法；迭代法；；

英文摘要： With the rapid economic development and the continuously increasing of traffic volume, axle load and vehicle speed, asphalt pavements are often damaged early, which influences traffic seriously, make great economic loss and impacts traffic safety. The existing pavement technology can't meet the requirement of pavement performance due to rapid improvement. Then it's necessary to consider inhomogeneity and randomness of asphalt concrete. In order to unclose the mechanism of pavement unstable failure, predict the performance of asphalt pavements, the theory of micromechanics, elastodyamics and FEM method will be introduced to deal with the problem. Considering the microstructure of asphalt concrete how influence its macro dynamic performance, dynamic effective elastic modulus and thermoelastic performance. Under the coupling act of temperature field and vehicle loads, the influence of microstuctures on the dynamic performance of asphalt pavement will be investigated. Considering the viscoelastic properties of asphalt concrete, the microscopic mechanism of unstable failure under dynamic loads will be analyzed, in which the factors such as traffic loads, temperature and microsturctural parameters will be considered.

英文关键词： non-homogeneous material；integral series method；iteraton method；；