Enhancement factors for the vertical response of footbridges subjected to stochastic crowd loading

Authors:
C. C. Caprani;J. Keogh;P. Archbold;P. Fanning
Affiliations:
Dept. of Civil and Structural Engineering, Dublin Institute of Technology, Bolton St., Dublin 1, Ireland;Dept. of Civil and Structural Engineering, Dublin Institute of Technology, Bolton St., Dublin 1, Ireland;Structures and Materials Research Group (STRAIT), Dept. of Civil, Construction and Mineral Engineering, Athlone Institute of Technology, Dublin Road, Athlone, Co Westmeath, Ireland;School of Civil, Structural, and Environmental Engineering, University College Dublin, Newstead Building, Belfield, Dublin 4, Ireland
Venue:
Computers and Structures
Year:
2012

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Abstract

The vertical acceleration response of a hypothetical footbridge is predicted for a sample of single pedestrians and a crowd of pedestrians using a probabilistic approach. This approach uses statistical distributions to account for the fact that pedestrian parameters are not identical for all pedestrians. Enhancement factors are proposed for predicting the response due to a crowd based on the predicted accelerations of a single pedestrian. The significant contribution of this work is the generation of response curves identifying enhancement factors for a range of crowd densities and synchronization levels.