The cycling activity has increased in recent years, either as a means of leisure or physical activity or as means of transport. Discomfort is one of the main complaints for cyclists, especially when related to the type o pavement they use while riding. This work presents a study of measurement and evaluation of human exposure to hand-arm vibration in the leisure cyclist activity in different pavements in order to classify according to vibration discomfort and to vibration injury risk. Methods: Vibration measurements are performed for three pavement types, asphalt (AS), precast concrete slab (PC), and interlocking concrete blocks (BI), using two bicycle models (time trial speed racing bike, S and mountain bike, MB), and cyclists with different physical characteristics. It is performed a quantitative analysis of each confi guration-pavement type × bike model × cyclist-where the daily vibration exposure A(8) is evaluated, as defi ned in ISO 5349-1 Standard, for 2h daily exposure. It is also evaluated the maximum daily exposure in order to reach limit values, as defi ned by Directive 2002/44/EC. Results: Based on a subjective analysis (survey), it is evaluated the comfort degree for vibration exposure for each tested pavement, according to a survey within cyclists. Finally, the results are compared using both quantitative and subjective analysis. Conclusions: Not surprisingly, it has been noticed that the most comfortable pavement type is the asphalt pavement (AS), followed by the precast concrete pavement (PC) and by the interlocking concrete blocks pavement (BI), confi rming the opinion pool within cyclists. As a new fi nding, for some pavement types, bikes and daily journey activities, the vibration levels may reach health limit levels which justify the originality of the work and the importance as guidance for healthy public decisions for new cycle paths. Keywords Vibration measurement in bicycles, Pavement to cycle paths, Hand-arm vibration, Human exposure to vibration.
Este artigo apresenta um estudo de medição e avaliação da exposição humana à vibração transmitida ao sistema mão-braço durante a atividade ciclística. Medições de vibração foram realizadas para três diferentes tipos de pavimento, asfalto (AS), placas moldadas "in loco" de concreto (PC) e blocos intertravados de concreto (BI), utilizando-se dois modelos de bicicleta, Speed (S) e Mountain bike (MB), além de ciclistas com diferentes características físicas. Para cada configuração pavimento x bicicleta x ciclista, de acordo com a exposição diária à vibração A(8), como definido pela norma ISO 5349-1, foi realizada uma avaliação para uma duração diária de 2h de exposição à vibração, bem como os tempos necessários para que os limites de exposição definidos pela Diretiva 2002/44/EC fossem atingidos. Por meio de uma análise subjetiva, também se avaliou o grau de conforto em cada tipo de pavimento quanto à exposição e à vibração, de acordo com uma pesquisa de opinião, realizada com os ciclistas. Ao final, os resultados são comparados e verifica-se, tanto pelos resultados objetivos, quanto pela avaliação subjetiva, que o tipo de pavimento mais adequado para a atividade ciclística é o asfalto (AS), seguido pelas placas moldadas "in loco" de concreto (PC) e dos blocos intertravados de concreto (BI). Palavras-chave: Exposição humana à vibração. Pavimentação em ciclovias. Vibração no sistema mão-braço.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.