Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (11): 12-16.

• Traffic & Transportation Engineering • Previous Articles     Next Articles

Viscoelastic Finite Element Analysis of Deformation of Asphalt Mixtures Under Repeated Load

Zhang Li-juan  Chen Ye-kai   

  1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2009-02-17 Revised:1900-01-01 Online:2009-11-25 Published:2009-11-25
  • Contact: 张丽娟（1968-），女，副教授，主要从事路基路面工程研究． E-mail:tczljuan@scut．edu．cn
  • About author:张丽娟（1968-），女，副教授，主要从事路基路面工程研究．
  • Supported by:

    国家自然科学基金资助项目（50808087）

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Abstract:

Asphalt mixture is a typical viscoelastic material, whose deformation law can be well described using the generalized Maxwell viscoelastic model. In this paper, the Prony series coefficients of the generalized Maxwell model are obtained by fitting the results of static creep test of AC-13C unmodified and modified asphalt mixtures. Then, a half-sinusoids load with 0.1 s loading duration and 0. 9 s unloading duration is used to simulate the dynamic vehicle load on the pavement. Moreover, the asphalt mixtures under repeated loads are analyzed by means of the viscoelastic finite element method, and the corresponding deformation consisting of both elastic strain and creep strain are predicted, with the results according well with the measured ones. As the creep strain leads directly to permanent deformation of asphalt mixtures, it is feasible to determine the elastic resilience of asphalt mixtures according to the creep strain.

Key words: asphalt mixtures, viscoelasticity, generalized Maxwell model, finite element analysis, repeated load, deformation