不同沥青混凝土路面结构的大温差温度行为分析

为基于环境因素的大温差地区选择适宜的沥青混凝土路面结构提供理论依据。考虑沥青混合料的感温特性,将路面结构视为层间接触的不连续层状体系,应用ABAQU S的瞬态热分析和热-结构耦合求解技术,对不同基层类型沥青混凝土路面结构在低温大温差作用下的温度场与温度应力响应等温度行为特性进行分析。分析结果表明:采用级配碎石、掺2%水泥的级配碎石以及沥青稳定碎石等柔性基层的沥青混凝土路面结构组合,具有优良的抗环境温度变化作用的性能,是高寒、低温大温差地区值得推荐选用的沥青混凝土路面结构。

Analysis of Temperature Action on Different Asphalt Concrete Pavement Structures by Large Temperature Changing

The theory basis for selecting the suitable asphalt pavement structure is provided on the basis of the environment factor in large temperature changing districts.The temperature action properties at low and large temperature changing condition,such as temperature fields and thermal stresses of different base-layer asphalt pavement structures,are analyzed by using the techniques of thermal instantaneous analysis and thermal-structure coupling resolution in ABAQUS.The results show that flexible base-layer asphalt pavement structures,such as graded aggregate,mixing 2% cement graded aggregate and bituminous stabilization aggregate,have fine anti-environment temperature action performance,which are the commendatory structure in plateau-cold or low and large temperature changing districts.