Simulação computacional do ensaio de módulo complexo em misturas asfálticas

Authors

  • Francisco José Pereira de Almeida Universidade Federal do Cariri (UFCA)
  • Lucas Feitosa de Albuquerque Lima Babadopulos Universidade Federal do Ceará (UFC)
  • Jorge Barbosa Soares Universidade Federal do Ceará (UFC)
  • Evandro Parente Junior Universidade Federal do Ceará (UFC)

DOI:

https://doi.org/10.14295/transportes.v27i2.1636

Keywords:

Asphalt Mixtures, Complex Modulus, Dynamic Modulus, Finite Elements, Linear Viscoelasticity.

Abstract

Considering heterogeneities and using the Finite Element Method, along with the Theory of Linear Viscoelasticity, the complex modulus test (absolute value called dynamic modulus and a phase angle) in asphalt mixtures is computationally simulated. The test consists in application of sinusoidal solicitation (stress or strain) and the respective reading of the mechanical response (strain or stress). Studied materials are a Fine Aggregate Matrix (FAM) and a Hot Mix Asphalt (HMA) composed of coarse aggregates, air and FAM. Mixture design parameters and mechanical properties of the constituents are the input parameters. Simulation results are compared with those obtained from laboratory tests. The influence of the aggregate modulus and voids ratio on the stiffness of the mixture is investigated. The results showed that at low frequencies, the variation in the stiffness of the aggregate has little effect in the variation of the dynamic modulus of the mixture, becoming more significant at higher frequencies. In addition, it was possible to obtain the dynamic module of the HMA from the simulation, estimating the modulus of elasticity of the aggregates. The dynamic modulus of the mixture decreases with the increase in its voids and presents an approximately linear behavior, especially at lower frequencies.

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Author Biography

Francisco José Pereira de Almeida, Universidade Federal do Cariri (UFCA)

Engenheiro civil. Professor adjunto da Universidade Federal do Cariri. Curso de engenharia civil. Análise de estruturas.

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Published

2019-08-31

How to Cite

Pereira de Almeida, F. J., Lima Babadopulos, L. F. de A., Soares, J. B., & Parente Junior, E. (2019). Simulação computacional do ensaio de módulo complexo em misturas asfálticas. TRANSPORTES, 27(2), 136–148. https://doi.org/10.14295/transportes.v27i2.1636

Issue

Vol. 27 No. 2 (2019)

Section

Artigos

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