连续配筋混凝土刚柔复合式路面是我国重载交通长寿命路面结构的主要发展形式，沥青面层开裂为其主要病害。项目根据传热学、力学、材料学等多学科理论，通过多尺度室内试验与仿真分析，并结合实体工程的现场调查与测试结果开展研究。拟通过热力耦合仿真分析确定连续配筋混凝土刚柔复合式路面结构的力学行为特征；通过沥青面层的非线性疲劳损伤演化行为及本构关系研究，探明沥青面层底部的损伤演化特性及开裂诱因，确定不同沥青面层厚度下CRC板缝隙宽度的控制指标；通过研发适用于沥青面层Top-Down疲劳开裂模拟的测试装置和开展疲劳试验，并结合X-Ray计算机断层扫描试验及图像三维重构、扩展有限元模拟，揭示沥青面层的Top-Down开裂机理并提出相应的控制方法；最后基于开裂控制确定沥青面层的材料组成、优化路面结构和配筋率设计方法。研究成果可为沥青面层设计理论的完善和发展提供理论基础和科学依据。

The rigid-flexible composite pavement of continuously reinforced concrete with asphalt concrete overlay is the primary structure for pavement subjected to heavy traffic to achieve a long service life in China. The main distress is cracking which occurs in the asphalt layer. In this project, multi-scale laboratory tests and simulation analysis based on heat transfer, mechanics, materials science and other multi-disciplinary theory, combined with field investigation and testing of engineering projects are used to carry out research. Mechanical behaviors of rigid-flexible composite pavement of continuously reinforced concrete will be identified by coupled thermo-mechanical simulation. Nonlinear fatigue damage evolution and constitutive of asphalt layer will be studied. Characteristics of the damage evolution and inducement of cracking occurring at the bottom of asphalt layer will be investigated. Controlling index of cracking width of continuously reinforced concrete (CRC) slab for different asphalt layer thicknesses will be proposed. Testing devices for Top-Down fatigue cracking simulation of asphalt layer will be developed. Fatigue test, X-Ray computed tomography, 3D image restructure and the extended finite element simulation will be hired to reveal the cracking mechanism of Top-Down fatigue cracking and put forward the corresponding control methods. Material composition of asphalt layer and optimization of pavement structure and reinforcement ratio calculation will be developed based on the cracking control. Results can provide theoretical basis and scientific evidence for the improvement and development the design theory of asphalt layer.