Evaluation of pavement profiles based on power spectral density as a complement to International Roughness Index (IRI)
Keywords:
Perfil longitudinal de pavimentos, Índice de Rugosidad Internacional (IRI), Densidad Espectral de Potencia (DEP), Características de ondasAbstract
The purpose of pavements is to provide an adequate level of serviceability to users. This purpose is directly related to its surface condition, being the longitudinal profile the most important characteristic that can affect the vehicles that use the roads. The evaluation of the pavement profile is carried out using profilometry equipment. To analyze the profile, the use of the International Roughness Index (IRI) has been standardized, which evaluates the surface irregularities of the pavement based on the "quarter car" model. This model is designed to represent the vertical response of a standardized vehicle over a specific range of wavelengths related to the quality of the pavement. The IRI does not allow discriminating the nature of the damage causing the irregularity in terms of its component wavelengths. The objective of this paper is to present as a tool the Spectral Power Density (DEP) analysis, which allows to analyze profiles in order to better understand how conservation actions should be defined based on the analysis of wavelengths. The DEP analysis, the procedure applied based on the Fourier transform, the results obtained and their interpretation are described. A case study is applied in which 4 sections with different IRI levels are evaluated. As a conclusion, the usefulness of analyzing pavement roughness using the DEP technique as a complement to the results obtained from the IRI can be appreciated.
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Copyright (c) 2024 J. Waldo Márquez S., Rodrigo Diaz T., Álvaro González V.
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