Detailed Dynamic Analysis of Newark Dyke Rail Bridge Newark Dyke bridge is a 77m long, 11.25m wide, steel bowstring arch railway bridge designed for the next generation of 225 kph trains and, as such, is the ?rst of its kind in Britain. It carries the two tracks of the East Coast main line across the River Trent at Newark in Nottinghamshire, and replaces two existing life-expired structures. LUSAS Bridge analysis software was used by Cass Hayward & Partners to carry out detailed dynamic analysis for their client Railtrack London North Eastern. The Interactive Modal Dynamics (IMD) techniques used greatly reduced the time required to assess the dynamic response of the structure for numerous combinations of di?erent moving train loads and speeds. The bridge was idealised in LUSAS as a sti?ene

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