Abstract
A comprehensive investigation, including analytical modelling, numerical analysis and experimental tests, has been carried out on many linear viscoelastic systems and structures. This approach is the result of research conducted by two research institutes, ICECON and INCERC Bucharest, from Romania. Thus, analyses were performed on the dynamic behaviour of composite viscoelastic materials, anti-vibration viscoelastic systems made of discrete physical devices, road structures consisting of layers of natural soil with mineral aggregates and asphalt mixtures, and mixed mechanic insulation systems for industrial vibrations formed of elastic and viscous devices. The objectives pursued were as follows: (a) providing a mass dosage of the mixture of earth (clay, sand, mineral aggregates, water, and stabilizer) in five variants; (b) carrying out a test run with a Bomag vibratory roller with variable vibration parameters; (c) Experimental evaluation of the vibration parameters and the force transmitted to the ground, correlated with the determination of the compaction layer; (d) use of methods of analysis for physic-mechanical and geotechnical parameters; (e) rheological and numerical modeling based on Zener schematics, so the consistency and veracity of the experimental data with the numerical simulation can be determined. Finally, a study is presented for a test track, where experimental and correlated input and response data are determined to validate the rheological model with a high loading rate.
Highlights
This paper introduces significant novelties to the field of Zener modeling of composite earth for road structures
The research objectives were based on dynamic behavior through the parametric dynamic response to harmonic excitation, using a vibratory roller with parametric adjustments
Dynamic response describes the evolution of the instantaneous displacement amplitude of the transmitted dynamic force and of the dissipated energy with respect to the continuous variation of Symmetry 2019, 11, 1050; doi:10.3390/sym11081050
Summary
This paper introduces significant novelties to the field of Zener modeling of composite earth for road structures (consisting of masses of clay, sand, mineral aggregates, water, and ecological stabilizer). Based on pulsation the families of Ω curves been numerically traced and experimentally verified parameters c or ζ, where ω is the natural pulsation of the system and ζ is the fraction of critical n on significant domains of technical interest, the specific conclusions aimed to provide a complete damping, such that c = systems, 2ζωn m. Similar results were used for image of the materials, Based on the families of curves that have Voigt–Kelvin), been numerically traced andfeatures, experimentally the rheological models
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