Measuring dynamic amplification factors in railway bridges: a field test at Zaltbommel
conference paper
Dynamic effects play a large role in fatigue assessment of railway bridges. When using the load model from Eurocode EN 1991-2 Annex D, a dynamic amplification factor (DAF) is defined which depends on the speed of the train and the influence length of the assessed element. This research describes part of the development of a measurement procedure for determining a distribution of the DAF for a specific bridge(element). Strains are measured at the cross girder of a bridge in the Netherlands during both orchestrated train passages and flowing traffic. Two ways of deriving a DAF are presented; one based on a reference speed and one based on filtering of the resonance signal. It is concluded that both evaluation methods lead to similar DAF’s. On top of this, different relationships with speed are found when evaluating different train types, indicating a train type dependency of the DAF.
Topics
TNO Identifier
1017860
Publisher
TNO
Source title
IABSE Congress Ghent 2025 – The Essence of Structural Engineering for Society, Ghent, Belgium, 27-29 August 2025
Pages
315-322
Files
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