Yakymenko Y. Increasing of a reliability of the flexible road pavement structure

The analysis of methods, providing a reliability of the road pavement structure, was carry out on the operation phase. Proposed mathematical model of interacting the wheel vehicles with road surface roughness, was represent in the form of a system of nonlinear differential equations. The variability laws of strength parameters, deformability parameters and inhomogeneity parameters of the asphalt concrete over the range of the running temperatures change and the loading speed were found, based on the carried out experiment. The estimating approach of reliability during the exploitation process was developed and the reliability analysis was carried out, depending on the traffic volume variation, strength, deformability and inhomogeneity of construction during daily and annual cycles. Based on carried out theoretical researches the partial square regression equation was obtained by complex experiment planning method, that allowed adequate to approximate the relation of car dynamism index from the road roughness height and the speed of movement of the car. Method of valuation and providing of flexible pavement reliability was improved, taking into account the dynamic load action and the change of weather-climatic factors.