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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。
This paper provides a theoretical basis for selecting suitable asphalt concrete pavement structure based on environmental factors in large temperature difference area. Considering the temperature sensitive property of asphalt mixture, the pavement structure is regarded as the discontinuous layer system with interlayer contact. The transient thermal analysis and thermo-structural coupling solution of ABAQU S are applied to analyze the different types of asphalt concrete pavement structure at low temperature Analysis of temperature behavior such as temperature field and temperature stress response under large temperature difference. The analysis results show that the asphalt pavement structure with graded gravel, graded macadam mixed with 2% cement and asphalt basement with flexible graded base have excellent performance of resistance to environmental temperature change. Temperature difference area is recommended to choose the asphalt concrete pavement structure.