MODELING AND ESTIMATION OF THE CON-DITION OF PAVEMENTS WITH THE THROUGH CRACKS
Journal Title: Вестник Харьковского национального автомобильно-дорожного университета - Year 2019, Vol 85, Issue
Abstract
The possibilities of assessing the state of nonrigid pavement structures with through cracks in the upper layers, which based on the results of GPR sound-ing and subsequent modeling of the stressstrain state of the structure, are considered. Water penetration across the through cracks to the lower layers may be the cause of an additional increase in the rate of degradation of the pavement. Attraction of GPR data allows one to estimate the humidity in the lower layers of the structure under the crack. To solve this problem, we used methods for processing pulse video signals of georadars. The assessment of the effect of through cracks in the pavement on the stress-strain state of the pavement design was carried out using the finite element method. For the simulation of the stress-strain state parameters of the calculated models was preliminarily justified. Experiments to determine the most unfavorable position of the load relative to the crack also was conducted. The results of calculations of the most important parameters affecting the strength and durability of the structure are given: tensile stresses on the lower plane of the upper layer, general deformation of the structure, shear stresses in layers with unbound materials and underlying soil. The stressstrain state modeling was carried out using the fi-nite element method (FEM) and static models with different humidity of the lower layer. The results obtained allowed one to quantify the effect of a through crack in the pavement. It was proposed to take into account the effect of through cracks in the calculations on the strength of the pavement by in-troducing an equivalent thickness of the monolithic pavement layer, reducing the ultimate shear stress in unbound base layers and underlying soil.
Authors and Affiliations
A. Batrakova, S. Urdzik, D. Batrakov
Keywords
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- EP ID EP648199
- DOI 10.30977/BUL.2219-5548.2019.85.0.49
- Views 111
- Downloads 0
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