Finite element modelling of partially saturated asphalt specimens subjected to frost – towards an explanation of winter potholes
| Autor: | Ferhat Hammoum, V.T. Vu, Jean-Michel Piau, Olivier Chupin |
|---|---|
| Přispěvatelé: | Matériaux pour Infrastructure de Transport (MAST-MIT), Université Gustave Eiffel, Laboratoire Auscultation, Modélisation, Expérimentation des infrastructures de transport (MAST-LAMES ), RP2-F14126 Thèse LHOIST (Van Thang VU) (20/10/2014 - 19/10/2017) |
| Rok vydání: | 2020 |
| Předmět: |
GEL DEGEL
CHAUSSEE (CORPS DE) BETON BITUMINEUX CHAUSSEE Materials science 0211 other engineering and technologies CYCLE GEL DEGEL 02 engineering and technology Viscoelasticity BI-COUCHE NID DE POULE [SPI.MAT]Engineering Sciences [physics]/Materials Pore water pressure ENROBE BITUMINEUX 021105 building & construction 0502 economics and business Geotechnical engineering Negative temperature ELEMENTS FINIS (METHODE) DEUX Civil and Structural Engineering 050210 logistics & transportation business.industry 05 social sciences Stefan problem COUCHE Finite element method Asphalt concrete [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering ENDUIT SUPERFICIEL METHODE DES ELEMENTS FINIS Mechanics of Materials Asphalt ENROBE Frost business |
| Zdroj: | International Journal of Pavement Engineering International Journal of Pavement Engineering, Taylor & Francis (Routledge), 2020, pp. 1-13. ⟨10.1080/10298436.2020.1843036⟩ |
| ISSN: | 1477-268X 1029-8436 |
| DOI: | 10.1080/10298436.2020.1843036 |
| Popis: | This article is related to the development of potholes in bituminous pavements possibly occurring in winter at negative temperature and in presence of pore water in the asphalt concrete (AC) layers. It was shown already that this type of degradation could be due to swelling of the AC pore water. A constitutive law was previously developed to model this phenomenon; the present article deals with its implementation in a finite element (FE) program to evaluate the mechanical effects induced by the propagation of a frost front in a pavement. This novel program handles the coupling between the thermoviscoelastic problem with swelling in AC materials and the heat equation with phase change. First applied to the modelling of characterization tests on partially saturated AC specimens, the developed program has proved to be relevant. Then, to get closer to onsite conditions, an original frost-thaw test was carried out on a bilayer AC structure partially saturated. The test led to the delamination of the two layers during the second frost-thaw cycle. Its modelling showed that the interface rupture was triggered by differential strains and self-stress fields developing in the sample. These results can provide an explanation to the initialisation of the pothole issue. |
| Databáze: | OpenAIRE |
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