Dynamic analysis of load effects for railway bridges on Malmbanan

Dokumentbeteckning: 2020:138

This report present a load effect analysis of 35 railway bridges on the iron ore line Malmbanan. Many of these bridges were originally designed for 25 tonnes axle load or less and is currently the subject of an upgrade to 32.5 tonnes axle load. The main aim of this study is to explore if the dynamic amplification factor can be decreased for the new trains at a speed of 70 km/h. Dynamic effects are often accounted for by a dynamic amplification factor of the static response. For real trains EN 1991-2 defines ϕ′ as a dynamic impact component and ϕ′′ as additional dynamic effects from track irregularities.
Artikelnr: TVD-62058