A serial two-stage viscoelastic–viscoplastic constitutive model with thermodynamical consistency for characterizing time-dependent deformation behavior of asphalt concrete mixtures

Sun, Lu; Zhu, Yaoting

doi:10.1016/j.conbuildmat.2012.10.004

Cited by 30 publications

(14 citation statements)

References 47 publications

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“…To carry out the conversion method for the Prony series, the master curves of the storage moduli were obtained, which was proposed by Park et al [32,33,34]. The storage modulus was related to the dynamic modulus and the phase angle as [32]:E′=|E∗|cosφ where E ’ is the storage modulus, | E * | is the dynamic modulus and φ is the phase angle.…”

Section: Viscoelastic Parameters Of High-modulus Asphalt Mixture (mentioning

confidence: 99%

Viscoelastic Mechanical Responses of HMAP under Moving Load

Sun

Lin

et al. 2018

Materials

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In order to represent the mechanical response laws of high-modulus asphalt pavement (HMAP) faithfully and objectively, the viscoelasticity of high-modulus asphalt mixture (HMAM) was considered, and the viscoelastic mechanical responses were calculated systematically based on moving load by numerical simulations. The performances of the HMAP in resistance to the deformation and the cracking at the bottom layer were compared with the ordinary asphalt pavement. Firstly, Lubao and Honeywell 7686 (H7686) were selected as the high modulus modifiers. The laboratory investigations of Asphalt mix-70 penetration, Asphalt mix-SBS (styrene-butadiene-styrene), HMAM-Lubao and HMAM-H7686 were carried out by dynamic modulus tests and wheel tracking tests. The conventional performances related to the purpose of using the HMAM were indicated. The master curves of the storage moduli were obtained and the viscoelastic parameters were fitted based on viscoelastic theories. Secondly, 3D pavement models based on moving loads for the viscoelastic structures were built using the non-linear finite element software ABAQUS. The wheel path was discretized in time and space to apply the Haversine wave load, and then the mechanical responses of four kinds of asphalt pavement were calculated. Finally, the sensitivity analysis was carried out. The results showed that the addition of the high modulus modifiers can improve the resistance to high-temperature rutting of the pavements. Except for the tensile strain and stress at the bottom of the underlayer, other responses decreased with the increases of the dynamic moduli and the change laws of the tensile strain and stress were affected by the range of the dynamic modulus. The tensile stress at the bottom of the asphalt layer would be too large if the modulus of the layer were too large, and a larger tensile strain would result. Therefore, the range of the modulus must be restricted to avoid the cracking due to excessive tension when using the HMAM. The resistance of the HMAP to deformation was better and the HMAP was less sensitive to load changes and could better withstand the adverse effects inflicted by heavy loads.

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Section: Viscoelastic Parameters Of High-modulus Asphalt Mixture (mentioning

confidence: 99%

Viscoelastic Mechanical Responses of HMAP under Moving Load

Sun

Lin

et al. 2018

Materials

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“…It is noted that creep rate increases gradually and the deformation-time curve deviates from the straight line. An inflection point can be easily observed in the transition from the stable creep to accelerated creep in the deformationtime curve, and the corresponding loading time at the inflection point is named rheology time Ft of FRAC [11]. Obviously, Ft is the time that the creep rate reduced to the minimum and the start time that FRAC begin to enter the stage of the accelerated creep.…”

Section: Viscoelastic Mechanic Model With Five Units and Eight Paramementioning

confidence: 99%

“…The various viscoelastic mechanics models can be formed by combining the basic A viscoelastic mechanics elements such as spring and dampers [1][2][3][4]. Generally, the model parameters can be obtained by uniaxial compression creep test, triaxial compression creep test and beam bending creep test [5][6][7][8][9][10][11]. Besides, the influence of stress level, temperature and fiber content on the model parameters and the viscoelastic behavior of AC can also be achieved by above mentioned tests.…”

Section: Introductionmentioning

confidence: 99%

A New Viscoelastic Mechanics Model for the Creep Behaviour of Fibre Reinforced Asphalt Concrete

Huang

Wang

Gao

2018

Frattura Ed Integrità Strutturale

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Based on the Burgers model, by adding a damper unit, this paper proposes a new viscoelastic model with five units and eight parameters to characterize the viscoelastic deformation of fiber reinforced asphalt concrete (FRAC). According to the creep tests of FRAC beams, this paper studies both the parameters in the model and the viscoelastic behaviour of FRAC with different fiber volume fraction and aspect ratio. In this model, this paper establishes the viscoelastic constitutive equation of asphalt concrete, which takes into account the impacts of fiber content characteristic parameter. Both the experimental study and theoretical analysis show that the new model has a high correlation with the results of creep experiment and plays a key role in describing the whole creep process of FRAC. The fiber content characteristic parameter can comprehensively reflect the effects of the fiber volume fraction and aspect ratio on the viscoelastic behaviour of FRAC. Within the range of this test, the optimum fiber volume fraction, fiber aspect ratio and fiber content characteristic parameter are 0.35%, 324 and 1.13, respectively.

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“…The safety of such a dam lies heavily on the damage mechanism of concrete. The concrete properties can be examined by several dynamic models [1][2][3][4][5][6][7]. However, it is necessary to construct a rational constitutive model of concrete with few assumptions and clear physical meaning, before exploring the nonlinear responses of arch dams.…”

Section: Introductionmentioning

confidence: 99%

An Elastic-plastic Constitutive Model of Concrete Based on Thermodynamic Principles and Its Application in Arch Dam Design

Xiang¹

2019

IJHT

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The safety of arch dams is greatly affected by the nonlinearity of the concrete. This paper introduces the basic theories on concrete constitutive models, analyzes the incremental energy dissipation function of concrete in the plastic process, and derives an elastic-plastic constitutive model for concrete based on thermodynamic principles. The proposed model was applied to examine the dynamic nonlinear seismic responses of an actual arch dam, and compared with several other models. Besides, the effect of strain rate on the concrete performance was also discussed in details. The research findings provide a reference for the safety evaluation of arch dam design.

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A serial two-stage viscoelastic–viscoplastic constitutive model with thermodynamical consistency for characterizing time-dependent deformation behavior of asphalt concrete mixtures

Cited by 30 publications

References 47 publications

Viscoelastic Mechanical Responses of HMAP under Moving Load

Viscoelastic Mechanical Responses of HMAP under Moving Load

A New Viscoelastic Mechanics Model for the Creep Behaviour of Fibre Reinforced Asphalt Concrete

An Elastic-plastic Constitutive Model of Concrete Based on Thermodynamic Principles and Its Application in Arch Dam Design

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