基于动态模量的沥青路面力学响应分析

实测了某柔性基层沥青路面试验段各层沥青混合料在不同温度和荷载作用频率下的动态模量,利用时间-温度转化原理得到了各自的动态模量主曲线和时间-温度转化因子,并结合路面结构内的实测温度和较成熟的荷载频率预测方法,分析了路面结构内温度和荷载频率的变化对沥青混凝土力学参数的影响。在此基础上进行了基于动态模量的沥青路面力学响应分析,并将分析结果与采用我国规范中的抗压回弹模量得到的结果进行了比较分析。采用动态模量的方法可以考虑路面结构内温度和荷载频率对路面力学响应的影响,从而使分析结果更加科学合理。

Analysis of Pavement Responses Based on Dynamic Modulus

The dynamic moduli at various temperatures and loading frequencies were measured for each asphalt mixture used in an asphalt pavement with flexible bases,and the dynamic modulus master curves and time-temperature shift factors were determined according to the time-temperature superposition principle.The effects of temperature and frequency on asphalt mixture properties were studied using measured pavement temperatures and well-accepted frequency prediction method.Pavement response were calculated using dynamic moduli,and the results were compared with those obtained using the method in China specification.The analysis based on dynamic modulus is more reasonable since it can take into account the effects of temperature and loading frequency.