沥青路面永久变形数值模拟及车辙预估

Rutting simulation and rutting depth prediction of asphalt pavement based on infinite element theory

沥青混合料的永久变形(车辙)是我国沥青路面早期病害中最主要的破坏类型,因而快速、简便、科学的进行车辙预估对于我国现阶段的路面结构设计与养护管理是非常必要的.提出基于有限元非线性理论沥青路面车辙数值模拟和车辙预估方法,结合廊沧高速廊坊段路面设计,分别进行SBS改性沥青混合料与高模量沥青混凝土进行车辙预估.结果表明:基于有限元理论的车辙预估方法,逻辑清晰,步骤严谨,操作简便,具有较高的理论和实践价值.

Permanent deformation of asphalt pavement is the most serious type of premature damages of asphalt pavement.So it is necessary to predict rutting depth accurately and rapidly for pavement structure design and maintains management.The paper put forwards rutting simulation and rutting depth prediction based on definite element method.According to Langfang section pavement design of Langcang expressway,rutting depth prediction of SBS modified asphalt concrete and high modulus asphalt concrete is analyzed using this method.Through analysis,the rutting depth prediction method expressway lane translation method is strict in theory,clear in design procedure and simple in operation.It has important theoretical and practical value,which is a good way for expressway pavement design and maintains management.