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2018, vol. 46, br. 4, str. 636-643
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Upravljanje naponima u šinama na železničkim mostovima
Management of stresses in the rails on railway bridges
aUniverzitet u Beogradu, Građevinski fakultet bMoscow State University of Civil Engineering, Russia
e-adresa: nmirkovic@grf.bg.ac.rs
Ključne reči: railway; continuous welded rail; vehicle/track/bridge interaction; fatigue design; rail stressreduction
Sažetak
Ovaj rad analizira napone u kontiunualno zavarenim šinama na mostovima, uključujući aspekt zamora šinskog čelika. Pored toga, ispituje se mogućnost izostavljanja šinskih dilatacionih sprava, uz istovremeno iskorišćenje kapaciteta dozvoljenih napona za profil šine 60E1. U skladu sa tim, kritički je analizirana opšta primena dozvoljenih vrednosti napona pritiska i zatezanja koje su propisane u važećim evropskim standardima. Rad uključuje aspekte posebne primene propisanih vrednosti napona za železničke mostove u Srbiji. U radu je predstavljen opšti algoritam za smanjenje napona usled interakcije vozilo/kolosek/most, koji je razvijen od strane autora. Ovaj algoritam uključuje sve bitne parametre konstrukcije mosta i gornjeg stroja železničke pruge, kao i uticaj klimatskih uslova i projekta trase pruge.
Abstract
This paper analyses the stresses in continuous welded rails on bridges including the aspect of fatigue of rail steel. Furthermore, it examines the possibility to avoid rail expansion joints, while simultaneously exploiting the permissible stress capacity of the rail profile 60E1. Accordingly, general application of permissible values of pressure and tensilestresses prescribed in the current European standards was critically analysed. Paper includes specific application aspects of the prescribed stress values for railway bridges in Serbia. General algorithm for reducing the stresses due to the vehicle/track/bridge interaction, which is presented in this paper, was developed by the authors. This algorithm includes all essential parameters of the bridge structure and railway superstructure, as well as the influence of climate conditions and railway route design.
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