2018, Vol. 5, No. 4. - go to content...

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DOI: 10.15862/13SATS418 (https://doi.org/10.15862/13SATS418)

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Tiraturyan A.N., Bodrov I.V., Simakova A.A., Farnieva M.V. Experimental studies of energy dissipation in the structure of the road structure under shock loading. Russian Journal of Transport Engineering. 2018; 5(4). Available at: https://t-s.today/PDF/13SATS418.pdf (in Russian). DOI: 10.15862/13SATS418

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

Tiraturyan Artem Nikolaevich
Don state technical university, Rostov-on-Don, Russia
E-mail: tiraturjan@list.ru

Bodrov Ilya Vladimirovich
Don state technical university, Rostov-on-Don, Russia
E-mail: bodrov_ilya120196@mail.ru

Simakova Anastasia Anatolievna
Don state technical university, Rostov-on-Don, Russia
E-mail: simakova000@gmail.com

Farnieva Marina Vyacheslavovna
Don state technical university, Rostov-on-Don, Russia
E-mail: Marina95farnieva@mail.ru

Abstract. 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 B_av = 4.0, the density of dissipated energy is S_av1 = 13.215 J/m³ the mark on the visual estimate of B_av = 4.61 is the dissipated energy density S_av2 = 7.52 J/m³, in the section with the average score on the visual estimate of B_av = 4.78 the density of the dissipated energy is S_av3 = 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.

Keywords: road clothes; technical monitoring; installation of shock loading; dynamic loop of a hysteresis; the area of a loop of a hysteresis; density of the disseminated energy; deflection bowl; visual assessment

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