Abstract
Vibrations in footbridges may be problematic as excessive vibrations may occur as a result of actions of pedestrians. Design-stage predictions of levels of footbridge vibration to the action of a pedestrian are useful and have been employed for many years based on a deterministic approach to modeling the action of a pedestrian. The paper employs a probability-based approach to modeling the action of a pedestrian by considering randomness in the behavior of the pedestrian crossing the footbridge. The paper describes the approach and studies implications (sensitivity) of selected decisions made when setting up the probabilistic framework for the predictions of footbridge response.
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Abbreviations
- a :
-
Bridge acceleration
- f s :
-
Step frequency
- m 1 :
-
Bridge modal mass
- α :
-
Dynamic load factor
- σ :
-
Standard deviation
- f 1 :
-
Bridge fundamental frequency
- F :
-
Walking load
- L :
-
Bridge length
- ζ 1 :
-
Bridge damping ratio
- Θ :
-
Phase
- i :
-
Integer
- l s :
-
Step length
- W :
-
Weight of pedestrian
- μ :
-
Mean value
- Φ:
-
Mode shape
References
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Acknowledgements
This research was carried out in the framework of the project “UrbanTranquility” under the Intereg V program and the authors of this work gratefully acknowledge the European Regional Development Fund for the financial support.
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Pedersen, L., Frier, C. (2017). Predicting Footbridge Vibrations Using a Probability-Based Approach. In: Caicedo, J., Pakzad, S. (eds) Dynamics of Civil Structures, Volume 2 . Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-54777-0_24
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DOI: https://doi.org/10.1007/978-3-319-54777-0_24
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