A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Fatigue Damage of Asphalt Pavement on an Orthotropic Bridge Deck
The behavior of asphalt layers on steel bridge decks is extremely complex. Its design for the wearing course on steel decks is important for durability reasons. The steel deck is a soft support as compared to the base course for pavement. The asphalt concrete on a steel deck is subjected to large strain that may generate cracks. A five-point bending fatigue test and a fatigue test on cylindrical specimens have been in development since 2003 at the ENTPE laboratory. The mechanical evolution of the material is monitored with displacement sensors and wave propagation throughout the test. Significant strain increases and decreases are observed when cracks are created and propagated. Velocities and amplitudes of waves decrease clearly as the number of load cycles increases. Under the assumption of linear viscoelasticity, the complex modulus and Poisson's ratio of the asphalt layer are calculated at each instant by inverse analysis, making it possible to plot the damage evolution curve for each asphalt mix tested. A new standard test method is currently being validated.
Fatigue Damage of Asphalt Pavement on an Orthotropic Bridge Deck
The behavior of asphalt layers on steel bridge decks is extremely complex. Its design for the wearing course on steel decks is important for durability reasons. The steel deck is a soft support as compared to the base course for pavement. The asphalt concrete on a steel deck is subjected to large strain that may generate cracks. A five-point bending fatigue test and a fatigue test on cylindrical specimens have been in development since 2003 at the ENTPE laboratory. The mechanical evolution of the material is monitored with displacement sensors and wave propagation throughout the test. Significant strain increases and decreases are observed when cracks are created and propagated. Velocities and amplitudes of waves decrease clearly as the number of load cycles increases. Under the assumption of linear viscoelasticity, the complex modulus and Poisson's ratio of the asphalt layer are calculated at each instant by inverse analysis, making it possible to plot the damage evolution curve for each asphalt mix tested. A new standard test method is currently being validated.
Fatigue Damage of Asphalt Pavement on an Orthotropic Bridge Deck
Arnaud, Laurent (author) / Houel, Adrien (author)
Road Materials and Pavement Design ; 8 ; 505-522
2007-01-01
18 pages
Article (Journal)
Electronic Resource
Unknown
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