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Back-Calculation of Material Properties of Asphalt Concrete using the APA Test

In: Computational Mechanics

Author

Listed:
  • Yongping Wang

    (Virginia Tech, Department of Civil and Environmental Engineering)

  • Linbing Wang

    (Virginia Tech, Department of Civil and Environmental Engineering)

Abstract

Improving the rutting resistance of asphalt concrete (AC) is one of the most important topics in pavement engineering. Simulative tests including Asphalt Pavement Analyzer (APA) tests have been increasingly used to evaluate the rutting potential of AC. However, they usually cannot give fundamental properties of AC due to the complex stress and strain fields. In this study, a computational simulation method for the APA test was developed to predict the rutting potential of AC through a viscoplasticity model and three-dimensional (3D) Finite Element Method (FEM). The model parameters were obtained through an inverse method. The back-calculation of material parameters usually requires repetitive computation to improve the results in an iterative manner. It is very time consuming. In order to improve the computation efficiency, a modified trial-and-error method which was based on sensitivity analysis of the model parameters was developed to obtain the model parameters. The comparison between APA test results and the model simulation was used to verify the effectiveness and accuracy of the developed method.

Suggested Citation

  • Yongping Wang & Linbing Wang, 2007. "Back-Calculation of Material Properties of Asphalt Concrete using the APA Test," Springer Books, in: Computational Mechanics, pages 317-317, Springer.
    • Handle: RePEc:spr:sprchp:978-3-540-75999-7_117
    DOI: 10.1007/978-3-540-75999-7_117
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