Finite Element Analysis of Anti-reflective Crack for Geosynthetic in Asphalt Overlay of Airport Runway

摘要

To make clear the work mechanism of geosynthetic in asphalt overlay under the aircraft wheel loads,one 3D dimension finite element model was constructed on the basis of the general purpose finite element software ABAQUS.Numerical calculation results with different geosynthetic modulus are presented in this paper,and show that it is very limited for geosynthetic to reduce bottom stress and surface deformation of asphalt overlay,and asphalt overlay bottom is in compression state,thus,geosynthetic can not exert it's film tension function,namely the main role ofgeosynthetic is not to bear loads together with asphalt overlay,but to improve stress state of asphalt overlay for preventing cracks appearance or delaying cracks expansion.