[1] Dong Niya, Li Chang, Ni Fujian, Finite element modeling of pavement responsesbased on stress-dependent properties of asphalt layer [J]. Journal of Southeast University (English Edition), 2015, 31 (3): 401-406. [doi:10.3969/j.issn.1003-7985.2015.03.018]

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Finite element modeling of pavement responsesbased on stress-dependent properties of asphalt layer()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

31

Issue:

2015 3

Page:

401-406

Research Field:

Traffic and Transportation Engineering

Publishing date:

2015-09-20

Info

Title:

Finite element modeling of pavement responsesbased on stress-dependent properties of asphalt layer

Author(s):

Dong Niya¹;  Li Chang¹;  Ni Fujian¹;  2

¹School of Transportation, Southeast University, Nanjing 210096, China
²Road Maintenance Technology Engineering Center of Jiangsu Province, Southeast University, Nanjing 210096, China

Keywords:

dynamic modulus test;  loading frequency;  stress-dependent model;  user-defined material(UMAT)subroutine;  pavement responses

PACS:

U416.217

DOI:

10.3969/j.issn.1003-7985.2015.03.018

Abstract:

In order to investigate the stress-dependent properties of hot-mix asphalt(HMA), a dynamic modulus test was conducted on a group of AC-20 specimens at various stress states and loading frequencies, respectively. A user-defined material(UMAT)subroutine incorporating stress-dependent constitutive model was developed and finite element(FE)simulation was utilized to confirm the validity of the UMAT. A three-dimensional(3D)FE model for typical pavement structure was established, considering the HMA layer as a stress-dependent material and other layers as linear elastic materials. Periodic load was applied to the pavement model and the pavement responses were calculated, including dynamic modulus distributions, surface deflection, shear stress and tensile strain in the HMA layer, etc. Both test results and FE model predictions indicate that the dynamic modulus of asphalt concrete is sensitive to stress state and loading frequency. Using the nonlinear stress-dependent model results in greater predicted pavement responses compared with the linear elastic model. It is also found that the effects of stress-dependency on pavement responses become more significant as loading frequency decreases.

References:

[1] Al-Qadi I, Wang H, Tutumluer E. Dynamic analysis of thin asphalt pavements by using cross-anisotropic stress-dependent properties for granular layer [J]. Transportation Research Record, 2010, 2154: 156-163.
[2] Ma X, Ni F J, Chen R S. Dynamic modulus test of asphalt mixture and prediction model [J]. China Journal of Highway and Transport, 2008, 21(3): 35-39.(in Chinese)
[3] Collop A C, Scarpas A, Kasbergen C, et al. Development and finite element implementation of stress-dependent elastoviscoplastic constitutive model with damage for asphalt [J]. Transportation Research Record, 2003, 1832: 96-104.
[4] Antes P W, Van Dommelen A E, Houben J M, et al. Stress-dependent behavior of asphalt mixtures at high temperatures [C]//Proceedings of the Technical Sessions. Lexington, USA: Association of Asphalt Paving Technologist, 2003, 72: 173-195.
[5] Zhao Y Q, Tan Y Q, Yu X. Stress-dependent mechanical behavior of asphalt mixtures [J]. Journal of Huazhong University of Science and Technology: Natural Science Edition, 2010, 38(10): 124-127.(in Chinese)
[6] Zeiada W, Kaloush K, Biligiri K, et al. Significance of confined dynamic modulus laboratory testing for asphalt concrete: conventional, gap-graded, and open-graded mixtures [J]. Transportation Research Record, 2011, 2210: 9-19.
[7] Zhao Y Q, Tang J, Liu L. Construction of triaxial dynamic modulus master curve for asphalt mixtures [J]. Construction and Building Materials, 2012, 37(12): 21-26.
[8] Zhao Y Q, Liu H, Liu W. Characterization of linear viscoelastic properties of asphalt concrete subjected to confining pressure [J]. Mechanics of Time-Dependent Materials, 2013, 17(3): 449-463.
[9] Zhao Y Q, Bai L, Liu H. Implementation of a triaxial dynamic modulus master curve in finite-element modeling of asphalt pavements [J]. Journal of Materials in Civil Engineering, 2014, 26(3): 491-498.
[10] AASHTO R 35-04. Standard practice for Superpave volumetric design for hot mix asphalt(HMA)[R]. Washington DC: American Association of State Highway and Transportation Officials, 2004.

Memo

Memo:

Biographies: Dong Niya(1987—), female, graduate; Ni Fujian(corresponding author), male, doctor, professor, nifujian@gmail.com.
Foundation item: Jiangsu Provincial Transportation Science and Technology Project(No.2011Y02-1-G1).
Citation: Dong Niya, Li Chang, Ni Fujian.Finite element modeling of pavement responses based on stress-dependent properties of asphalt layer[J].Journal of Southeast University(English Edition), 2015, 31(3):401-406.[doi:10.3969/j.issn.1003-7985.2015.03.018]

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