Abstract
The paper analyzes the dynamic response of a lively footbridge, 107 m long, overpassing the river Lambro near Milano (Italy). Ambient vibration tests (AVTs), performed in 2016 as a part of proof tests, detected the first flexural frequency at 1.75 Hz, within the critical range of vibration for walking pedestrians. In a previous numerical and experimental work, a FE model accurately reproduced the first frequency but showed a poor match of the second one, corresponding to a torsional mode. In onsite tests, groups of up to twelve pedestrians, adopted as vibration exciters, crossed the footbridge with step frequency and spatial configurations exciting mainly the first mode. To overcome these limitations, in this study AVTs were performed to repeat the identification of the second mode. The FE model was updated subsequently. Onsite tests were repeated with a group of five pedestrians, each walking alone. Walking paths and step frequencies were chosen to excite both the first and the second mode. The pedestrians’ vertical acceleration was recorded using a mobile phone. The experimental data concerning both footbridge response and pedestrians’ acceleration are analyzed to detect the correlation between the two.
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References
Díaz, I.M., Gallegos, C.A., Ramírez Senent, J., Renedo, C.M.C.: Interaction phenomena to be accounted for human-induced vibration control of lightweight structures. Front. Built Environ. (7) (2021). https://doi.org/10.3389/fbuil.2021.658529
Gallegos-Calderón, C., Naranjo-Pérez, J., Díaz, I.M., Goicolea, J.M.: Identification of a human-structure interaction model on an ultra-lightweight FRP footbridge. Appl. Sci. 11(14), 6654 (2021). https://doi.org/10.3390/app11146654
Lucà, F., Berardengo, M., Manzoni, S., Scaccabarozzi, D., Vanali, M., Drago, L.: Experimental evaluation of the driving parameters in human–structure interaction. Vibration 5, 121–140 (2022). https://doi.org/10.3390/vibration5010008
Pavic, A., Reynolds, P., Sachse, R.: Human-structure dynamic interaction in civil engineering dynamics: a literature review. Shock Vibr. Digest. 35 (2003). https://doi.org/10.1177/0583102403035001624
Cigada, A., Gentile, C., Lastrico, G., Mulas, M.G.: Measuring the dynamic response of a lively footbridge to ambient and walking excitation. In: Proceedings of XI EURODYN (2020)
Zerruso, L.: Analisi sperimentale e simulazione numerica delle vibrazioni indotte da pedoni in transito su una passerella pedonale (in Italian). MS Thesis, Politecnico di Milano (2019)
Staacks, S., Hütz, S., Heinke, H., Stampfer, C.: Advanced tools for smartphone-based experiments: phyphox. Phys. Educ. 53(4) (2018). https://doi.org/10.1088/1361-6552/aac05e
Brincker, R., Ventura, C.: Introduction to Operational Modal Analysis. Wiley (2015). ISBN: 978-1-119-96315-8
Peeters, B., Van der Auweraer, H., Guillaume, P., Leuridan, J.: The PolyMAX frequency-domain method: a new standard for modal parameter estimation? Shock. Vib. 11, 395–409 (2004)
Kavanagh, J.J., Barrett, R.S., Morrison, S.: Upper body accelerations during walking in healthy young and elderly men. Gait Posture 20, 291–298 (2004)
Menz, H.B., Lord, S.R., Fitzpatrick, R.C.: Acceleration patterns of the head and pelvis when walking on level and irregular surfaces. Gait Posture 18, 35–46 (2003)
Acknowledgements
This work is based on the MS thesis in Civil Engineering, Politecnico di Milano, of L. Zerruso, under the guidance of the first two Authors. The contribution of S. Manzoni in the footbridge OMA is gratefully acknowledged. The first Author acknowledges the financial contribution of Italian MIUR under grant PRIN 2015–2018, Project 2015TTJN95, “Identification and monitoring of complex structural systems”.
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Cigada, A., Mulas, M.G., Zerruso, L. (2023). Dynamic Response of a Lively Footbridge Under Walking Pedestrians. In: Limongelli, M.P., Giordano, P.F., Quqa, S., Gentile, C., Cigada, A. (eds) Experimental Vibration Analysis for Civil Engineering Structures. EVACES 2023. Lecture Notes in Civil Engineering, vol 433. Springer, Cham. https://doi.org/10.1007/978-3-031-39117-0_32
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DOI: https://doi.org/10.1007/978-3-031-39117-0_32
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