Evaluation of flexible pavement deterioration conditions using deflection profiles under moving loads

With the development and application of highway-speed nondestructive testing (NDT) devices, a reliable method to evaluate current level deterioration pavements from measured results is necessary provide comprehensive timely maintenance rehabilitation decisions for pavements. The objective this study conditions flexible their deflection profiles under moving loads. due primarily growth microcracks in pavement materials commonly called “crack initiation” phase. This phase characterized represented by decrease dynamic modulus increase angle. To simulate loads, three-dimensional (3D) finite element (FE) model constructed using commercial FE software an equivalent two-dimensional (2D) axisymmetric built artificial intelligence (AI)-based updating. are analyzed time lag between load peaks used define new term named “lag angle” represent structural response It also found angle closely related degree pavement, speed load, material properties which reveals promising evaluation NDT devices.