On Non‐linear Characteristics Evaluation of Vibratory Tool and Terrain Interaction for Embankment Works

Abstract

AbstractThe complete and correct identification and evaluation of proper characteristics of terrain for embankment works is the frame idea of this analysis. The study began from the necessity of vibratory working tools utilization for different construction jobs. Mainly, the simple dynamic calculus is used for estimation of proper parameters values for this kind of works. It supposes a linear characteristic of the material in interaction with vibrating tool and it estimates the domain of working parameters. But instrumental tests reveal that the terrain has a non‐linear characteristic and the dynamic behaviour acquires deviation from theoretical estimations. An identification procedure followed by a correct and complete evaluation of the non‐linear parameters gives the necessary information for a practical case. Available mathematical models require a lot of initial values for characteristic parameters, but changing the case changes the values. A complex model which needs only initial tuning offers a proper solution to simulate, estimate, evaluate and analyze the interactions between the vibratory tools of construction equipments and the terrain. Non‐linear static and dynamic characteristics are the basic model defined properties. Elastic, dissipative and plastic rheological components were included into the main model. Partial concluding remarks have shown a good approximation between numerical results and experiments. The results of this study are very useful for vibratory equipment designing and correct exploitation, check of Regulations conformity for construction technologies, and oldies equipments maintenance. (© 2012 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)