ANALYSIS OF VEHICLE VIBRATIONS - NEW APPROACH TO RATING PAVEMENT CONDITION OF URBAN ROADS

摘要

Urban road infrastructure is daily burdened by heavy traffic volume. Pavement structure roughness observations are significantly more difficult in urban agglomerations than on roads in unpopulated areas. Roughness, expressed bylRI (International Roughness Index), directly affects the quality and safety of road traffic. Within the framework of the pavement management in relation to safety and the achievement of the best possible ride comfort, it is very important to foresee when a road should be reconstructed. The method for quality evaluations of safety and ride comfort on urban roads presented in this paper is based on vehicle vibrations measurements. In the article, measuring of vehicle vibrations was performed on the main urban roads in Zagreb (Croatia). Measurements covered roads with different pavement surface roughness. This method can be simply and very easily used in pavement management aimed at achieving road safety and better ride comfort. The results of measurements according to this method could be used by traffic and civil engineering experts as an indication for the roads that require reconstruction or maintenance.%Na cestovnoj infrastrukturi u gradovima odvija se svakodnevno vrlo intenzivan obujam prometa. Opažanje stanja ravnosti kolničke konstrukcije, koje direktno utječe na kvalitetu i sigurnost odvijanja cestovnog prijevoza, a izražava se indeksom ravnosti IRI (International Roughness lndex), posebno je otežano u urbanim aglomeracijama u usporedbi s prometnicama izvan naselja. U okviru gospodarenja kolnicima s obzirom na sigurnost i postizanje najbolje moguće udobnosti vožnje, vrlo je važno predvidjeti kada se mora pristupiti rekonstrukciji prometnice. Metoda za ocjenu razine sigurnosti i udobnosti vožnje na gradskim prometnicama prikazana u ovom radu, temelji se na mjerenju vibracija vozila. Navedena mjerenja provedena su na glavnim gradskim prometnicama u Zagrebu (Hrvatska), a obuhvaćene su prometnice s različitim neravninama na voznoj površini. Prikazana se metoda može jednostavno i vrlo lako primjenjivati u okviru gospodarenja kolnicima s ciljem postizanja veće sigurnosti i udobnosti vožnje. Rezultati mjerenja, dobiveni u skladu s ovom metodom, mogu poslužiti kao prijedlog prometnim stručnjacima za donošenje preporuka kod kojih nepravilnosti na kolniku treba pristupiti rekonstrukciji ili održavanju kolnika.