Analysis of flexible pavement with cross-anisotropic material properties

Beriha, Brundaban; Sahoo, Umesh Chandra

doi:10.1007/s42947-020-0284-9

Cited by 6 publications

(2 citation statements)

References 12 publications

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“…Multiple studies over the years have recognized the significance of the behavior of unbound granular materials [10][11][12], which is normally nonlinear elastic. Other studies have additionally focused on the base material Designs 2023, 7, 142 2 of 14 cross-anisotropy [13][14][15], as well as on the joint modeling of the unbound materials' nonlinear and anisotropic behavior [16][17][18][19][20]. As per the subgrade materials, a greater variance is also present because of the high engineering spectrum of soil material properties [21].…”

Section: Introduction 1overviewmentioning

confidence: 99%

Pavement Analysis with the Consideration of Unbound Granular Material Nonlinearity

Gkyrtis

2023

Designs

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Accurate pavement design and evaluation requires the execution of response analysis. Pavement materials’ behavior does not necessarily conform to the assumptions of the multi-linear elastic theory usually adopted during pavement analysis. In particular, the unbound granular materials located in the base and sub-base layers behave in a nonlinear elastic manner, which can be captured through advanced constitutive modeling of their resilient modulus. The finite element method enables us to code constitutive models and quantify potential variations in pavement responses because of different mechanistic assumptions. In this study, variations in response are investigated for a typical structure of a flexible pavement considering the nonlinear anisotropic behavior of the unbound materials together with their initial stress–strain state. To demonstrate the impact of their behavior on the outcome of pavement analysis, variable asphalt concrete layer thicknesses and moduli are assumed, such that they cover a large spectrum of roadways. It was found that pavement responses can be calculated up to 3.5 times higher than those retrieved from the conventional linear analysis. This comparison means that the alterative mechanistic modeling of the unbound granular materials can be proved to be more conservative (i.e., leading to higher strains) in terms of pavement design and analysis. From a practical perspective, this study alerts pavement scientists and engineers engaged in pavement design to a more reliable performance prediction, which is needed to bridge the gap between advanced modeling and routine analysis.

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Section: Introduction 1overviewmentioning

confidence: 99%

Pavement Analysis with the Consideration of Unbound Granular Material Nonlinearity

Gkyrtis

2023

Designs

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“…The reinforcement effect of fibers in the soil is anisotropic [ 17 ]. When the orientation angle of a fiber is perpendicular to the direction of the strong contact force, the fiber exerts the maximum effect [ 18 ]. Fibers can improve the ductility and compressive resistance of reinforced soil and reduce the sensitivity of soil to water [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental study on engineering properties of fiber-stabilized carbide-slag-solidified soil

et al. 2022

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Carbide slag has been used to prepare solidified soil to effectively reduce the stacking and disposal of carbide slag and achieve efficient resource utilization. Because of the significant brittleness and low strength of carbide-slag-stabilized soil, fibers were added to carbide-slag-stabilized soil in this experimental study. The effects of fiber length and fiber content on the unconfined compressive and indirect tensile strengths of carbide-slag-stabilized soil were investigated. The concepts of the density of fibers in solidified soil and the number of fibers in a unit volume solidified soil were proposed, and the effects of fiber distribution density on the mechanical properties of the solidified soil were evaluated. The fibers increased the indirect tensile strength of the carbide-slag-solidified soil, which was significantly higher than the unconfined compressive strength of the solidified soil. The fibers had no significant effect on the unconfined compressive and indirect tensile strengths of the 7 d carbide-slag-solidified soil but increased those of the 28 d carbide-slag-solidified soil. The enhancement effect was the most significant when a 0.3% content of 19 mm long fibers was incorporated into the carbide-slag-solidified soil.

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Developing Resilient Modulus Prediction Models Based on Experimental Results of Crushed Hornfels Mixes with Different Gradations and Plasticity

Fouad

Hassan

Mahmood

2021

Int. J. Pavement Res. Technol.

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Analysis of flexible pavement with cross-anisotropic material properties

Cited by 6 publications

References 12 publications

Pavement Analysis with the Consideration of Unbound Granular Material Nonlinearity

Pavement Analysis with the Consideration of Unbound Granular Material Nonlinearity

Experimental study on engineering properties of fiber-stabilized carbide-slag-solidified soil

Developing Resilient Modulus Prediction Models Based on Experimental Results of Crushed Hornfels Mixes with Different Gradations and Plasticity

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