Three-dimensional stress and deformation modeling in flexible pavement

A flexible pavement consists of a multi-layer structure built on a subgrade, where each layer has a specific role. At the top of the structure, the bituminous or cement concrete pavement serves the structural role of distributing the load and ensuring the waterproofing of the roadway. A road structure is subjected to two main stresses, which are the stresses imposed by temperature variations and those imposed by rolling loads. In this study, for the detection of stresses occurring in the layers of the road pavement. The ANSYS program, a finite element software, was used. With the ANSYS software The stress analysis of the flexible superstructure was carried out considering different variables. First variable analysis of pavement stresses based on the change in the modulus of elasticity, 3000 MPa, 2500, and 60 MPa for these. During the application of the method, the deformed road section was analyzed under different axles. Loads (700 kPa) and temperatures (30 and 0 °C), as well as the load and The changes in pavement deformation over time were examined under these variables. The results showed that the elastic modulus of the bituminous mix and the base layer had a slight effect on rutting performance. However, when the temperature rose above 30°C, significant deformation and vertical displacement of the layer coating occurred.