Análise paramétrica de pavimento flexível: influência dos parâmetros estruturais e da aderência entre camadas

Abstract

This study analyzes the structural behavior of a flexible pavement through simulations performed using the AEMC software, considering a structure composed of an asphalt surface layer, a graded crushed stone base, and a subgrade. The objective is to evaluate the influence of layer thicknesses, subgrade resilient modulus, and bonded and unbonded interface conditions on the structural response of the pavement. To achieve this, simulations were carried out using different combinations of asphalt layer thickness, base thickness, and subgrade resilient modulus, evaluating surface deflection, horizontal tensile strain at the bottom of the asphalt layer, and vertical compressive stress at the top of the subgrade. The results showed that increasing the asphalt layer thickness and the subgrade resilient modulus reduced tensile strains, vertical stresses at the top of the subgrade, and surface deflections, increasing the estimated pavement service life. It was also observed that the lack of bonding between layers increased tensile strains in the asphalt layer and surface deflections, reducing fatigue life. It is concluded that the simulations performed using the AEMC software are an important tool for evaluating the influence of structural parameters and supporting the design of flexible pavements.