The extended shift model as a mechanistic-empirical approach to simulating confined permanent deformation of asphalt concrete in compression

摘要

The extended shift model is presented as a convenient and effective mechanistic-empirical approach to simulating the densification induced permanent deformation of asphalt concrete under repeated loading. The model is composed of an incremental function that provides a reference deformation curve, and a shift factor function expressed in terms of three variables: reduced pulse time, confining pressure, and vertical stress. The model can be characterized by four triaxial stress sweep tests, and it fits in the state-of-practice frameworks to predict pavement rutting with improved reliability. (C) 2016 Elsevier Ltd. All rights reserved.