Mathematical modelling of random narrow band lateral excitation of footbridges due to pedestrians walking

Authors:
V. Racic;J. M. W. Brownjohn
Affiliations:
Department of Civil & Structural Engineering, University of Sheffield, Sir Frederick Mappin Building, Sheffield S1 3JD, United Kingdom;Department of Civil & Structural Engineering, University of Sheffield, Sir Frederick Mappin Building, Sheffield S1 3JD, United Kingdom
Venue:
Computers and Structures
Year:
2012

Citing 2
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Application of the pseudo-excitation method to assessment of walking variability on footbridge vibration

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Abstract

Motivated by the existing models of wind and earthquake loading, speech recognition techniques and a method of replicating electrocardiogram (ECG) signals, this paper presents a mathematical model to generate synthetic narrow band lateral force signals due to individuals walking. The model is fitted to a database comprising many directly measured walking time series, yielding a random approach to generating their artificial - yet realistic counterparts. This multi-disciplinary modelling strategy offers a radical departure from traditional Fourier-based representations of lateral walking loads towards more reliable and more realistic vibration serviceability assessment of footbridges.