Combined effect of asphalt concrete cross-anisotropy and temperature variation on pavement stress–strain under dynamic loading

摘要: Abstract This study investigates the combined effects of asphalt concrete (AC) cross-anisotropy and temperature on pavement’s stress–strain under moving wheel loads. To facilitate this study, a dynamic Finite Element Model (FEM) an instrumented pavement section Interstate-40 (I-40) near Albuquerque, New Mexico, is developed in ABAQUS incorporating depth-temperature variations AC layer truck loading. Cross-anisotropy model defined as ratio horizontal to vertical modulus ( n -value) AC. Field compacted cores were collected from tested laboratory determine -value viscoelastic parameters, which are incorporated FEM using User Defined Material (UMAT) interface ABAQUS. validated field measured deflections strains values Falling Weight Deflectometer (FWD) test. The used for parametric by varying -values material different temperatures. It observed that tensile strain at bottom decreases approaches 1.0 (isotropy). indicates increases. also top layers with increase -value. leads decrease layers. based variation shows well AC, base, subbase, subgrade highly sensitive layer.