The paper deals with the validation of a one-dimensional (1-D) visco-elastoplastic constitutive model able to reproduce the non-linear time-dependent behaviour of asphalt concrete. In order to determine the constitutive parameters of the model, by means of an appropriate identification procedure, an extensive experimental investigation has been carried out. Creep tests at different temperatures on specimens of bituminous mixtures, usually employed in pavement layers, have been performed. The effectiveness of the model as well as of the identification procedure has been verified by comparison between the material response, obtained numerically, and the experimental data. The analysis of the results of creep tests allowed to find a trend of variation of elastic and viscous parameters with temperature.
|Titolo:||Relevant constitutive characteristics of asphalt concrete mixtures: an experimental and analytical approach|
|Data di pubblicazione:||2007|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|