沥青路面温度-水力-应力多场耦合非线性系统动力学行为研究

项目名称： 沥青路面温度-水力-应力多场耦合非线性系统动力学行为研究

项目编号： No.11202142

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 司春棣

作者单位： 石家庄铁道大学

项目金额： 28万元

中文摘要： 随着交通工程日益向高速和重型化快速发展，高速公路的沥青路面早期破坏成为了人们关注的重点。工程实践表明，沥青路面结构体中温度场、水分场及应力场耦合效应是客观存在的，其耦合效应直接影响了路面结构体的稳定性。本课题通过对沥青混合料的非线性黏弹性力学特性和环境因素的分析，探索沥青路面的疲劳特性和车辙形成原因；基于日周期条件下路面结构体温度场非线性模型和水分渗透模型，对温度荷载、水力荷载、应力荷载下沥青路面结构体的动力学行为进行分析；利用热力学、流体动力学、黏弹性力学及非线性动力学等方法，构建温度-水力-应力多物理场耦合非线性数学模型，探索多场耦合作用下沥青路面结构体变形破坏的本构关系和数值模拟方法；结合现场实验验证，揭示车辆载荷和自然环境共同作用下的沥青路面结构体动力响应规律，对阐明沥青路面结构体的破坏特征和机理具有重要意义，为沥青路面高速公路健康运行、安全管理奠定了基础。

中文关键词： 沥青路面；动力学；温度-水力-应力；多场耦合；有限元分析

英文摘要： The early damage of highway asphalt pavement has become the focus of attention with the increasing high-speed and heavy industrialization development of traffic engineering. Engineering practice indicates, the coupling induction of thermal, hydraulic, mechanical field is objective existence in the asphalt pavement structure, and the coupling induction has a direct impact on the stability of pavement structure. Through the analysis of nonlinear viscoelastic properties of asphalt mixture and environmental factors, the fatigue property and reasons for rutting formation are explored. The dynamic behavior of asphalt pavement structure under thermal, hydraulic, and mechanical load is analysed, based on the temperature field nonlinear model and moisture penetration model under conditions of daily cycle. Using the thermodynamics, fluid dynamics, viscoelastic mechanics and nonlinear dynamics methods, the thermal-hydraulic-mechanical multi-physical coupled nonlinear mathematical model is constructed, the constitutive relationship and numerical simulation method of asphalt pavement structure deformation under multi-physical coupling action is explored. Combined with field experiment, the dynamic response of asphalt pavement structure is revealed under vehicle load and environmental factors. The research achievements is of

英文关键词： Asphalt pavement；Dynamics；Thermal-hydraulic-mechanical；Multi-physical coupling；Finite element analysis