2019 CSCE Annual Conference - Laval (Greater Montreal) Conference
Dr. Susan Tighe, CPATT - University of Waterloo
Asphalt is the predominant paving material in north American airports. Compared to road pavement, airside pavement endures much higher vertical load from aircraft and lower daily traffic frequency, which is considered into the airport pavement design procedure. In the meantime, flexible pavement also experiences tremendous horizontal force during different aircraft ground maneuverings such as full-brake, landing, slow turning etc. Asphalt material is time and temperature dependent viscoelasto plastic material, it deforms under various loading and environmental conditions. Horizontal force resistance has not been taken into account for airport flexible pavement design.
Shear distresses in airport pavement are frequently observed in Canada, The U.S and Australia, horizontal deformation and layer slippage are two typical shear-related pavement distresses due to different failure mechanisms. Mechanical analysis between airport pavement surface and aircraft tire are of vital significance to an optimized flexible pavement design, the location and quantity of critical shear stress and strain calculation can be achieved by application of Finite Element Method.
This study focuses on mechanical behaviors analysis between asphalt pavement and aircraft tire. A three-dimensional airside pavement and aircraft tire model is established based on ABAQUS. The objective of this study is to investigate the critical value of shear stress in terms of quantity and location, the result of this study can be used to guide shear resistant asphalt mix design in further researches.