Identifying features of the stressed-strained state of a non-rigid roadbed along ascents and descents on highways
DOI:
https://doi.org/10.15587/1729-4061.2024.307829Keywords:
asphalt-concrete pavement, ascent, descent, non-rigid roadbed, stressed-strained state, cracking, durabilityAbstract
The object of this study is the asphalt-concrete layers of non-rigid roadbed on ascents and descents of highways before bridges.
Asphalt-concrete layers of highways on approaches to bridges are one of the most important elements for providing the strength and durability of the entire structure of non-rigid roadbed. On the ascents and descents of approaches to bridges, where the speed of vehicles changes most often, the roadbed is exposed to more intense damage than in other areas. Practical experience shows that one of the most common root causes of the types of destruction of asphalt-concrete layers is disruption of their integrity in the form of cracks, which creates dangerous situations for road users due to premature and more intensive destruction of all road surfaces.
This paper investigates features of the stressed-strained state of asphalt-concrete layers of roadbed on ascents and descents in the areas connecting bridges and overpasses with the embankment. A spatial finite-element model has been considered, which makes it possible to describe the stressed-strained state of each element in the road surface structure induced by the effect of traffic load on it.
Quantitative and qualitative analysis of deformations, displacements, and stresses in asphalt-concrete layers of the structure of roadbed was carried out. Circumstances that can affect the premature formation of cracks and lead to a decrease in the durability of roadbed structures have been identified.
This study makes it possible to identify and eliminate potential dangers that arise during the operation of roadbed. The results could be implemented in the design of roadbed in areas with difficult traffic in the area of ascent and descent, in particular before the bridge. Knowledge of features of the stressed-strained state of roadbed would contribute to the preservation of road infrastructure, could make it possible to improve the comfort and convenience when moving goods and passengers
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Copyright (c) 2024 Volodymyr Mozhovyi, Oleksandr Kushnir, Liydmyla Levkivska, Oleksandr Kutsman, Sergii Levkivskyi, Ilona Hrynchak
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