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International Journal for Multiscale Computational Engineering
Fator do impacto: 1.016 FI de cinco anos: 1.194 SJR: 0.554 SNIP: 0.68 CiteScore™: 1.18

ISSN Imprimir: 1543-1649
ISSN On-line: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.2012003471
pages 615-634

MULTISCALE VISCOELASTIC−VISCOPLASTIC MODEL FOR THE PREDICTION OF PERMANENT DEFORMATION IN FLEXIBLE PAVEMENTS

Elisabeth Aigner
Austrian Institute for Construction Engineering, Schenkenstrasse 4, A-1010 Vienna, Austria
Roman Lackner
Material Technology Innsbruck, University of Innsbruck, Innsbruck, Austria
Josef Eberhardsteiner
Institute for Mechanics of Materials and Structures, Vienna University of Technology, Karlsplatz 13/202, A-1040 Vienna, Austria

RESUMO

Creep/relaxation of asphalt consisting of the thermorheological binder material (bitumen), inclusions (aggregates), and air voids may lead to considerable permanent deformations (rutting). Although viscoelastic models are suitable to describe the asphalt behavior at low stress levels and in the low-temperature regime, material models taking plastic deformation into account are needed in order to capture the thermorheological behavior of asphalt at elevated temperature regimes. In this paper, the deformation behavior of asphalt is described by means of a creep/relaxation function, which, in a second step, is extended toward viscoplastic deformation. The underlying model parameters describing the thermorheological nature of asphalt are determined from a multiscale model considering five observation scales. The model, implemented into a Finite Element program, is used for determination of permanent deformations, as illustrated by the reanalysis of triaxial cyclic compression tests and the prediction of rutting in flexible pavements.

Referências

  1. Aigner, E., Lackner, R., and Pichler, C., Multiscale prediction of viscoelastic properties of asphalt concrete. DOI: 10.1061/(ASCE)0899-1561(2009)21:12(771)

  2. Blab, R., Eberhardsteiner, J., Gagliano, B., Jäger, A., Kappl, K., Lackner, R., Spiegl, M., and Wistuba, M., Christian Doppler Laboratory—Mid Term Report, Christian Doppler Laboratory for Performance-Based Optimization of Flexible Pavements.

  3. Blab, R., Kappl, K., Lackner, R., and Aigner, E. , Samaris d28 Vol. 1: Main report: Permanent deformation of bituminous bound materials in flexible pavements-evaluation of test methods and prediction models.

  4. Di Benedetto, H., Delaporte, B., Sauzeat, C., and Neifar, M., A thermo-viscoplastic model for bituminous materials. DOI: 10.1007/1-4020-5370-3_176

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