Effect of the Realistic Tire Contact Pressure on the Rutting Performance of Asphaltic Concrete Pavements
| Autor: | Masoud K. Darabi, Dallas N. Little, Sun-Myung Kim, Rashid K. Abu Al-Rub |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Viscoplasticity Aggregate base Rut business.industry Flow (psychology) 0211 other engineering and technologies Stiffness 02 engineering and technology Finite element method Viscoelasticity Asphalt concrete 020303 mechanical engineering & transports 0203 mechanical engineering 021105 building & construction medicine Geotechnical engineering medicine.symptom business Civil and Structural Engineering |
| Zdroj: | KSCE Journal of Civil Engineering. 22:2138-2146 |
| ISSN: | 1976-3808 1226-7988 |
| Popis: | The effect of different configurations of normal contact stresses on the rutting performance of asphalt concrete overlays on a soft and stiff Crushed Aggregate Base (CAB) layer is investigated. A three-dimensional (3-D) finite element model of a pavement structure is generated. The effect of different types of simplified normal contact stresses and a realistic 3-D normal stress on the rutting performance is investigated. Since the failure mechanism of asphaltic materials at high temperature is mainly related to the flow of the material, the viscoelastic and viscoplastic constitutive relationships coupled with the hardening-relaxation mechanisms are utilized to represent the behavior of asphalt concrete layer. This constitutive relationship is part of the PANDA (Pavement Analysis using Nonlinear Damage Approach) model developed by the authors and their collaborators. As the result of simulation, the magnitude of the rut depth on the asphalt concrete layer is generally determined to be inversely proportional to the stiffness of the CAB layer, and the rut depth on the asphalt concrete layer under the realistic 3-D normal stress is about 1.5 times greater than the rut depth under uniformly distributed normal stress. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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