Spectral Element Simulation of Heavy Weight Deflectometer Test Including Layer Interface Conditions and Linear Viscoelastic Behaviour of Bituminous Materials

Roussel, Jean-Marie; Benedetto, Hervé Di; Sauzéat, Cédric; Broutin, Michaël

doi:10.1007/978-3-030-55236-7_68

Cited by 3 publications

(2 citation statements)

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“…4 The deflection basins obtained by extracting peak values for each deflection time-history (fig. 1B) present the same trend as those obtained by taking into account an interface stiffness parameter such as that developed by Roussel et al 1 FIG. 1 Influence of interface defect on HWD deflections, in situ results (A) central peak deflection (from Sadoun, Broutin, and Simonin 4 ) and (B) selected deflection basins.…”

Section: Introductionsupporting

confidence: 82%

“…In particular, interface bonding conditions are of major concern because in most cases structural problems come from interface defects, and furthermore, they have a huge impact on the pavement current mechanical behavior and its remaining service life. It actually significantly affects the stresses and strains observed in the asphalt course, as it is numerically demonstrated in Roussel et al 1 The phenomenon of asphalt slippage cracking is a serious concern, especially for airfield pavements. Indeed, several cases of debonding between layers and slippage in hot-mix asphalt layers have been observed at different airports in the last few years.…”

Section: Introductionmentioning

confidence: 92%

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Development of an In Situ Measurement Device for Airfield Pavement Interface Characterization

et al. 2021

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Regular pavement condition evaluation is the key to ensuring a good asset management of in-service pavements, for it allows anticipating and optimizing maintenance or rehabilitation works.In particular, interface bonding conditions between asphalt concrete layers are of major concern since in most cases structural problems come from interface defects, and they furthermore have a huge impact on the pavement current mechanical behavior and its remaining service life.Usual structural non destructive testing (NDT) devices do not allow assessing this parameter on their own. This is the reason why there is a need for an in-situ measurement system. The French Civil Aviation Technical Center (STAC) launched then an ambitious research and development program with the objective of developing a proof-of-concept for such a device and associated data analysis methodology, which enables characterizing the interface response for several mechanical solicitations including rollingwheel passage or Heavy Weight Deflectometer (HWD) dynamic impulse load, with a twofold purpose:better understand for research purposes the interfaces mechanical behavior and its evolution during the life of the pavement; and have at disposal an operational tool to evaluate interface bonding condition of in-service pavements. This paper presents the measurement device developed by the STAC. It is inspired from the ovalization system invented in the 70's by the LPC (les Laboratoires des Ponts et Chaussées), which consists in measuring the diameter variation of a core-hole in three horizontal directions (longitudinal (L), transverse (T) and 45°) during the passage of a rolling-wheel. The first part of the paper focuses on the device development process which led to the final prototype. The second part is dedicated to the 3D-finite element modeling developed for data analysis. The results from a field survey, performed on the STAC's test facility, are finally presented and compared with numerical simulations.

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Section: Introductionsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 92%