01620207

Component

https://doi.org/10.3141/2631-13

Rapid traffic loading induces pore water pressure inside partially or fully saturated interconnected cracks and voids of asphalt concrete. The induced pore pressure contributes extra stresses within the pavement and accelerates crack evolution and propagation. Crack propagation facilitates diffusion of moisture through the solid phase and accelerates the degradation of the time-dependent stiffness and strength of asphalt concrete. Therefore, it is imperative to consider the coupled effects of pore water pressure, moisture diffusion, and mechanical loading on asphalt concrete pavement. The effect of pore water pressure was considered by using the effective stress concept inside deformable media. Biot’s approach was used and coupled to the nonlinear viscoelastic and viscodamage (moisture and mechanical) constitutive relationships for asphalt concrete. The models were implemented in PANDA, a finite element code developed at Texas A&M University. Capabilities of the proposed framework and constitutive relationships were demonstrated through the simulation of several realistic microstructural representations of asphalt concrete. The results of numerical simulations demonstrated how the effect of pore water pressure can intensify damage within asphalt concrete and reduce its strength. Therefore, this outcome emphasizes the importance of incorporating the effect of pore water pressure in investigating the response of asphalt concrete.

01637861

17-06131

English

pp 114–122

2017

Transportation Research Record: Journal of the Transportation Research Board

9780309441506

Digital/other

Figures (9) ; References (19)

Asphalt concrete pavements; Finite element method; Mechanical loads; Microstructure; Moisture content; Pavement cracking; Pore water pressures; Simulation

Design; Highways; Materials; Pavements

TRIS, TRB, ATRI

Dec 8 2016 12:29PM

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• Comparing the Performance of Fiberglass Grid with Composite Interlayer Systems in Asphalt Concrete
• Evaluation of Small Specimen Geometries for Asphalt Mixture Performance Testing and Pavement Performance Prediction
• Laboratory Evaluation of a Plant-Produced High Polymer–Content Asphalt Mixture
• New and Simpler Cracking Test Method for Asphalt Mix Designs
• Numerical Modeling and Artificial Neural Network for Predicting J-Integral of Top-Down Cracking in Asphalt Pavement
• Overlay Tester Results from Dense-Graded Asphalt Concrete Mixes: Accuracy in Characterizing Crack Susceptibility
• Practical Method to Determine Strain Level for Cyclic Direct Tension Fatigue Testing in the Asphalt Mixture Performance Tester
• Sensitivity of the Illinois Flexibility Index Test to Mixture Design Factors
• Short-Term Performance and Evolution of Material Properties of Warm- and Hot-Mix Asphalt Pavements: Case Studies
• The Logit Model and the Need to Reproduce the Stiffness Degradation Curve of Asphalt Specimens During Fatigue Testing
• Use of Digital Image Correlation for the Evaluation of Flexural Fatigue Behavior of Asphalt Beams with Geosynthetic Interlayers
• Use of Fine Aggregate Matrix Experimental Data in Improving Reliability of Fatigue Life Prediction of Asphalt Concrete: Sensitivity of This Approach to Variation in Input Parameters
• Use of Nonlinear Acoustic Measurements for Estimation of Fracture Performance of Aged Asphalt Mixtures
• Viscoelasticplastic–Fracture Modeling of Asphalt Mixtures Under Monotonic and Repeated Loads