Three Different Ways of Calibrating Burger's Contact Model for Viscoelastic Model of Asphalt Mixtures by Discrete Element Method

Huan Feng, Matteo Pettinari, Henrik Stang

Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

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 PFC3D, 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.
Original languageEnglish
Title of host publication8th RILEM International Symposium on Testing and Characterization of Sustainable and Innovative Bituminous Materials
Number of pages11
Volume11
PublisherSpringer
Publication date2016
Pages423-433
DOIs
Publication statusPublished - 2016
Event8th RILEM International Symposium on Testing and Characterization of Sustainable and Innovative Bituminous Materials - Ancona, Italy
Duration: 7 Oct 20159 Oct 2015
Conference number: 8

Conference

Conference8th RILEM International Symposium on Testing and Characterization of Sustainable and Innovative Bituminous Materials
Number8
CountryItaly
CityAncona
Period07/10/201509/10/2015
SeriesR I L E M Bookseries
ISSN2211-0844

Keywords

  • Asphalt mixtures
  • Viscoelastic
  • Discrete element method
  • Burger's model

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