Vilayer: Pavement Analysis Program

The pavement structure is a significant cost component in a road construction project. Furthermore, the pavement structure's quality also impacts a road network's operational capability and service capacity. Therefore, the design of the pavement structure plays a crucial role in enhancing project quality and reducing construction costs. Mechanistic-Empirical Pavement Design (MEPD) are widely employed in road pavement structure design in developed countries. Following this approach, calculating stress, strain, and displacement is paramount. In this study, the pavement analysis program VILAYER is developed and designed to improve user experience. The Burmister theory is applied to compute stress, strain, and displacement along various directions at calculation points within flexible road pavement layers. In addition, the Gaussian quadrature integral technique and the Richardson extrapolation are implemented to improve the accuracy of calculations for points near the surface layer of the flexible pavement structure. The renowned pavement analysis program BISAR is chosen to participate in the verification process of the VILAYER. Moreover, the common flexible pavement structures in Vietnam are used for comparative analysis of stress, strain, and displacement calculations between the VILAYER and BISAR. As a results, there is no significant difference between the two program's computed stress, strain, and displacement values. Thus, the VILAYER program is a promising candidate for the practical application of MEPD method in designing flexible pavement structures in Vietnam.