Effects of overload and layer interface condition on estimated flexible pavement lifespan: Case study from BR-116/BA

It is consensus that overloads on vehicle axles accelerate pavement deterioration, which produce effects on these structures’ lifespan. Therefore, this study sought to evaluate the effect of traffic overload on a pavement’s estimated lifespan through stress–strain analyses, considering different lay...

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Bibliographic Details
Published in:	Transportation Geotechnics Vol. 34; p. 100762
Main Authors:	Rebouças Santana, Vanessa, de Souza Almeida, Mario Sergio, Bressanin, Hermes Wiliam, Almeida Brito, Jamille, Silva Costa, Weiner Gustavo, da Costa São Mateus, Maria do Socorro
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-05-2022
Subjects:	AEMC Back-calculation BackMeDiNa MeDiNa Stress–strain analysis Back-calculation AEMC MeDiNa Stress–strain analysis BackMeDiNa
Online Access:	Get full text
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Summary:	It is consensus that overloads on vehicle axles accelerate pavement deterioration, which produce effects on these structures’ lifespan. Therefore, this study sought to evaluate the effect of traffic overload on a pavement’s estimated lifespan through stress–strain analyses, considering different layer interface conditions (fully bonded, partially and fully debonded) as well as different deflectometric basins, average and maximum, obtained from tests with Falling Weight Deflectometer (FWD). Data from three Homogeneous Segments (HS) that are part of a highway duplication and restoration project being developed from KM 387.41 to KM 427.75 of BR-116/BA were used. Deflectometric data were back calculated on BackMeDiNa software, which estimated the resilient moduli used as inputs during stress–strain analyses on AEMC software. These simulations aimed to determine not only the elastic responses of the structure but also the overlay thicknesses required to restore pavement functional properties on each HS. Results indicate that pavement lifespan predictions are closely related to loading percentual increases, whilst a decreasing and non-linear relationship between these parameters was observed. Moreover, it was found that, when friction between layers is disregarded, overlays are considerably thicker than those obtained when pavement layers are fully or partially bonded.
ISSN:	2214-3912 2214-3912
DOI:	10.1016/j.trgeo.2022.100762