Technical gazette, Vol. 30 No. 2, 2023.
Original scientific paper
https://doi.org/10.17559/TV-20220806010532
Tests on the Influence of Cyclic Loading and Temperature on the Behaviour of Flexible Pavement Reinforced by Geogrids with Numerical Simulation
Abdelkader Medjdoub
; Geomaterials and Civil Engineering Laboratory, Civil Engineering Department, University of Blida 1, Soumaa Road, N°270, Blida, Algeria
Mouloud Abdessemed
orcid.org/0000-0002-5324-0521
; Geomaterials and Civil Engineering Laboratory, Civil Engineering Department, University of Blida 1, Soumaa Road, N°270, Blida, Algeria
Abstract
Crack growth is one of the most common failure modes in flexible linear infrastructure as a result of the effect of cyclic traffic loads and the climate influence. The results of an experimental study performed by applying different types of geogrids on asphalt concrete (AC) samples are presented in this paper. Static then cyclic loading are applied to these specimens reinforced before loading and the rest pre-cracked and loaded. Also, the influence of the type of geogrid, the type of loading, the frequency of cyclic loading and the variation of the ambient temperature were examined, by simulating the performance of real pavements in the great Algerian south, where the thermal gradient may reach the value of 30 °C. A total of 20 specimens were tested to evaluate the tensile strength, stresses and strains. A numerical analysis based on the finite element method, using an adapted software, was performed to match the experimental results found. The results (experimental and numerical) indicate that the optimal type and location of the geogrid, by static or cyclic loading, is critical to achieve stress and strain gains of up to 26% and thus can result in an aging delay of approximately five years compared to the application of traditional methods.
Keywords
asphalt concrete; cyclic/fatigue; experimental; geogrid; numerical analysis
Hrčak ID:
294372
URI
Publication date:
26.2.2023.
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