Assessing effect of elastic properties of asphalt concrete pavements on shear strength
Shear strength of asphalt concrete pavement (ACP) is a fundamental property in resisting rutting. An in-situ shear strength testing facility was developed at Carleton University, and a more advanced version of this facility is currently under development. In using this facility, a circular area of the pavement surface is forced to rotate about a normal axis by applying a torque on a circular plate bonded to the surface. The pavement shear resistance is then related to the maximum torque. This problem has been solved mathematically in the literature for a linear, homogeneous and isotropic material. However, as the ACP materials may exhibit nonlinear and/or non-elastic properties, a finite element model was designed and validated for use in simulating the effect of different materials properties. This paper presents the development of a three-dimensional finite element model that can simulate the forces applied while measuring the ACP shear strength. A comparison between the model results and those obtained from available analytical models as well as field measurements proved the accuracy of the developed model. Taking advantage of the sectorfal symmetry of the problem, the model is further revised to be more suitable when considering the non-elastic properties of the ACP.
|Conference||2000 Annual Conference - Canadian Society for Civil Engineering|
Bekheef, W. (W.), Hassan, Y, Halim, A.O, & Easa, S.M. (S. M.). (2000). Assessing effect of elastic properties of asphalt concrete pavements on shear strength. In 2000 Annual Conference Abstracts - Canadian Society for Civil Engineering.