关键词: NCHRP 1-37A性能模型, 动态模量主曲线, 轴载谱, 气候参数, 试验段性能观测

Abstract: TPavement performance prediction models are essential for pavement structure design and economic analysis,and the accuracy of the model directly influences the reliability of design and analysis results.The mechanistic-empirical pavement design method developed under NCHRP 1-37A project has gained great attention.Validity of the NCHRP 1-37A performance models was evaluated through an asphalt pavement test section with flexible base.Materials,traffic and environment parameters were found out,according to the requirements of NCHRP 1-37A models.Rutting,fatigue cracking and thermal cracking were predicted and the predicted distresses were compared with the measured distresses.The results show that short-term prediction results of NCHRP 1-37A models are reasonably accurate and that of long-term rutting prediction appears to be smaller,based on local experiences on asphalt pavements with semi-rigid bases,while the actual accuracy of long-term prediction results needs to be verified by continuous performance monitoring of the test section.

Key words: NCHRP 1-37A performance models, dynamic modulus master curve, load spectra, environmental parameters, performance monitoring of test section