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The article deals with the issues of experimental research of energy dissipation processes in the structure of pavements under shock loading. The study of these processes is characterized by scientific and practical significance, since it is the energy dissipation that is determined by the state and mechanisms of deformation of all the constructive layers of flexible pavements without exception. As part of these studies, a comprehensive assessment of the state of three sites in different technical and operational conditions was carried out, as evidenced by the average score for visual assessment and, accordingly, the number and types of defects. In all the surveyed areas, measurements were carried out using the FWD shock loading installation, with registration of dynamic hysteresis loops at each point in the “load-deflection” coordinates. The area of dynamic hysteresis loops was used to calculate the density of dissipated energy under impact. In the course of the work performed, it was established that when the transport and operational state of the site deteriorates, the density of the dissipated energy increases significantly, so for sites with an average score by visual assessment Bav = 4.0, the density of dissipated energy is Sav1 = 13.215 J/m3 the mark on the visual estimate of Bav = 4.61 is the dissipated energy density Sav2 = 7.52 J/m3, in the section with the average score on the visual estimate of Bav = 4.78 the density of the dissipated energy is Sav3 = 5.00 J/m3. From a practical point of view, these results are an experimental basis for creating a new approach to technical monitoring of the state of flexible pavements, precisely from the standpoint of analyzing the total energy dissipated in its structure during the entire life cycle.

Experimental studies of energy dissipation in the structure of the road structure under shock loading