Abstract
Vibration serviceability of structures for human occupancy has become an important part of the design of slender civil engineering structures such as footbridges. In the past decades, a considerable amount of research has been carried out within the field and international codes of practice and state-of-the-art design guidelines been improved considerably. However, there are several important questions that remain unanswered. In particular the response of pedestrians to footbridge vibrations is severely under-researched. This is primarily due to lack of data from real-life footbridges subject to in-service traffic. In addition, the lack of a generally accepted way to quantify measured vibration response on footbridges makes it difficult to interpret data from already published experiments. In this paper, various methods to quantify human-response to vibrations are reviewed and put in relation to the results obtained from a controlled crowd test on a steel footbridge in Reykjavik, Iceland. A systematic quantification of the measured vibration response is carried out and the results are presented statistically through their probability distributions. Finally, testimonies from participants in a controlled perception tests are used in conjunction with measured responses, to obtain valuable information about human response to footbridge vibration. It is shown that there is only a small correlation between the subjective rating and the vibration felt by the pedestrians.
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Acknowledgements
The authors kindly acknowledge Efla Consulting Engineers and the Icelandic Road Administration for their financial support and students from the University of Iceland for participating in the pedestrian tests.
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© 2012 The Society for Experimental Mechanics, Inc. 2012
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Ingólfsson, E.T., Gudmundsson, G.V., Živanović, S., Pavic, A. (2012). Crowd-Induced Vibrations of a Steel Footbridge in Reykjavík. In: Caicedo, J., Catbas, F., Cunha, A., Racic, V., Reynolds, P., Salyards, K. (eds) Topics on the Dynamics of Civil Structures, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-2413-0_7
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DOI: https://doi.org/10.1007/978-1-4614-2413-0_7
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