Abstract
In this paper the viscoelastic behavior of asphalt mixture was investigated by employing a three-dimensional discrete element method. Combined with Burger’s model, three contact models were used for the construction of constitutive asphalt mixture model with viscoelastic properties in the commercial software PFC 3D, including the slip model, linear stiffness-contact model, and contact bond model. A macro-scale Burger’s model was first established and the input parameters of Burger’s contact model were calibrated by adjusting them so that the model fitted the experimental data for the complex modulus. Three different approaches have been used and compared for calibrating the Burger’s contact model. Values of the dynamic modulus and phase angle of asphalt mixtures were predicted by conducting DE simulation under dynamic strain control loading. The excellent agreement between the predicted and the laboratory test values for the complex modulus shows that DEM can be used to reliably predict the viscoelastic properties of asphalt mixtures.
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Feng, H., Pettinari, M., Stang, H. (2016). Three Different Ways of Calibrating Burger’s Contact Model for Viscoelastic Model of Asphalt Mixtures by Discrete Element Method. In: Canestrari, F., Partl, M. (eds) 8th RILEM International Symposium on Testing and Characterization of Sustainable and Innovative Bituminous Materials. RILEM Bookseries, vol 11. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-7342-3_34
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DOI: https://doi.org/10.1007/978-94-017-7342-3_34
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