Influência da velocidade da medição nos resultados de atrito com o GripTester
- Victoria Piccoli Ciolin
- Israel Keiti do Nascimento
- Rafael Vicente Mota
- André Vale
- Felipe Filizzola Camargo
RoadRunner Engenharia Ltda
- Evento
- XXII SITRAER – Brasília, DF, Brasil, 22 a 24 de outubro de 2025
- Volume
- Anais do XXII Simpósio de Transporte Aéreo – SITRAER 2025 · ISBN 978-65-272-2024-4 · DOI 10.29327/9786527220244
- Editora
- Even3 Publicações
- Editores
- Fabiana Serra de Arruda, Camila Lucena, Giovanna Miceli Ronzani Borille, Evandro José da Silva
Resumo
Operational safety at airports and on high-traffic runways depends on reliable friction coefficient measurements. This study evaluated the influence of GripTester operating speed (60, 80, and 100 km/h) on friction coefficient measurements in terms of the Grip Number (GN) across three roadway sections in the state of São Paulo, also representing different macrotexture conditions in terms of Mean Profile Depth (MPD) and longitudinal irregularity in terms of the International Roughness Index (IRI). Repeated passes were performed with two GripTester devices, and the coefficient of variation (COV) and relationships with surface parameters were analyzed using mean values integrated over each 100-meter segment. Results showed that average GN values remained consistent across speeds, with COV predominantly between 2% and 5%, indicating high repeatability of the evaluated devices. Minor variations occurred on more irregular sections at 100 km/h, but without statistically significant differences. Therefore, it is concluded that speed has little influence on GN measurements, with pavement comfort (IRI) being the main factor associated with variability in the results.
Palavras-chave: GripTester; friction measurement; test speed; surface texture; International Roughness Index