Avaliação do conforto vibracional de passageiros de ônibus e da irregularidade longitudinal de pavimentos com dados de smartphones

Abstract

Highways can be evaluated according to the quality of road they provide to users. This condition is mainly characterized by the longitudinal irregularity of pavements, which can cause discomfort and insecurity for users, in addition to increasing Vehicle Operating Costs (VOC). In recent years, several researchers have investigated the use of smartphones to collect data related to the comfort of users of transport systems and useful information for Pavement Management Systems (SGP), due to its practicality and low cost. In this study, an analysis of the vibrations caused in bus passengers was carried out using data from smartphones in the city of Santa Maria (RS). Accelerations were collected in three different positions inside different buses (front axle, rear axle and bus overhang) to analyze the comfort of users, based on the ISO 26311 standard, which deals with the analysis of Whole Body Vibrations (WBV). Linear regression models were also generated between the accelerations provided by smartphones and the longitudinal unevenness of existing pavements along the bus route, using International Irregularity Index (IRI) data obtained by an inertial laser profilometer. The results obtained revealed a significant difference between the vibrations generated in different positions, the balance being the position with the highest amplitude vibrations, while the front axle was considered the most comfortable. Regarding the regression models obtained, it is considered that the accelerations measured by smartphones on board buses are not a relevant variable for predicting the IRI.