Abstract
The Lysefjord suspension bridge (Norway) is instrumented with accelerometers, anemometers, weather station and a GPS monitoring system, making it a full-scale test bed for research on dynamic bridge behavior and wind characteristics in a complex terrain. In this study we investigate bridge vibrations induced by heavy vehicles crossing the bridge. As the bridge is located on the outskirts of the urban environment, the traffic across the bridge is generally intermittent, allowing for investigating loading effects of individual heavy vehicles during days with low wind velocity. The findings suggest that heavy vehicles cause a considerable dynamic load effects, especially when entering and exiting the bridge, especially at higher modes of vibration with natural frequencies above 1 Hz.
Spectral analysis of the traffic induced acceleration time series agree with results from previous studies showing that the acceleration bridge response to vehicles consists of a combination of both low and higher frequency modes. Truck induced excitation has been used to estimate the modal parameters of the bridge, such as critical damping ratios for the vertical modes of vibration assuming a viscous-equivalent damping and a logarithmic decay of the bridge motion as the trucks exit the bridge. The identified damping ratios as well as natural frequencies are found to be comparable to values obtained from general ambient vibration data. However, there are significant variations in the results depending on measurement location and the driving pattern of the truck along the bridge.
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References
Norwegian Ministry of Transport and Communication. National Transport Plan 2014 – 2023 (2012)
Snæbjörnsson, J., Jakobsen, J.B., Cheynet, E., Wang, J.: Full-scale monitoring of wind and suspension bridge response. In: IOP Conference Series: 450 Materials Science and Engineering, vol. 276, no. 1, pp. 012007 (2017)
Cheynet, E.: Wind-Induced vibrations of a suspension bridge. PhD thesis, University of Stavanger (2016)
Cheynet, E., Jakobsen, J.B., Snæbjörnsson, J.: Buffeting response of a suspension bridge in complex terrain. Eng. Struct. 128, 474–487 (2016)
Cheynet, E., Jakobsen, J.B., Snæbjörnsson, J.: Full scale monitoring of wind and traffic induced response of a suspension bridge. In: MATEC Web of Conferences, vol. 24. EDP Sciences, p. 04003 (2015)
Snæbjörnsson, J., Cheynet, E., Jakobsen, J.B.: Performance evaluation of a suspension bridge excited by wind and traffic induced action. In: Proceedings of 8th European Workshop on Structural Health Monitoring (EWSHM 2016), Bilbao, Spain (2016)
Cheynet, E., Snæbjörnsson, J., Jakobsen, J.B.: Identifying traffic induced vibrations of a suspension bridge: a modelling approach based on full-scale data. In: IMAC 37 (2019)
Apaydin, N.M., Kaya, Y., Safak, E., Alçik, H.: Vibration characteristics of a suspension bridge under traffic and no traffic conditions. Earthquake Eng Struct Dyn. 41(12), 1717–1723 (2012)
Erdogan, H., Gülal, E.: Ambient vibration measurements of the Bosporus suspension bridge by total station and GPS. Exp Tech. 37(3), 16–23 (2013)
Kim, C.-Y., Jung, D.-S., Kim, N.-S., Kwon, S.-D., Feng, M.Q.: Effect of vehicle weight on natural frequencies of bridges measured from traffic-induced vibration. Earthquake Eng and Eng Vibr. 2(1), 109–115 (2003)
Brownjohn, J.M.W.: Estimation of damping in suspension bridges. In: Proceedings of the Institution of Civil Engineers - Structures and Buildings, vol. 104, no. 4, pp. 401–415 (1994)
Selberg, A.: Damping effects in suspension bridges. IABSE publications, Mémoires AIPC, IVBH Abhandlungen (1950)
Liu, Y., Kong, X., Cai, C., Wang, D.: Driving effects of vehicle-induced vibration on long-span suspension bridges. Struct. Control Health Monit. 24(2), e1873 (2017)
Bryja, D., Sniady, P.: Stochastic non-linear vibrations of highway suspension bridge under inertial sprung moving load. J. Sound Vib. 216(3), 507–519 (1998)
Fadnes, T.O.: A full-scale study on traffic induced vibrations of a suspension bridge. Master’s thesis, University of Stavanger, Norway (2017)
Brincker, R., Zhang, L., Andersen, P.: Modal identification from ambient responses using frequency domain decomposition. In: Proceedings of the 18th International Modal Analysis Conference, IMAC XVIII (2000)
Cheynet, E., Snæbjörnsson, J., Jakobsen, J.B.: Temperature effects on the modal properties of a suspension bridge. Dynamics of civil structures, vol. 2. In: Proceedings of the 35th IMAC, A Conference and Exposition on Structural Dynamics 2017, Chapter 12, pp. 87—93. Springer, ISBN: 978-3-319-54777-0, https://doi.org/10.1007/978-3-319-54777-0_12 (2017)
Xia, Y., Chen, B., Weng, S., Ni, Y.-Q., Xu, Y.-L.: Temperature effect on vibration properties of civil structures: a literature review and case studies. J Civil Struct Health Monitor. 2(1), 29–46 (2012)
Acknowledgements
This work has been supported by the Norwegian Public Road Administration, with Mathias Eidem as the main contact person. Thanks are due to Anette Ravndal, truck driver at Bjørn Hansen AS for her cooperation. Special thanks go to Etienne Cheynet at the University of Stavanger for his assistance in the data handling and manuscript preparation.
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Snæbjörnsson, J.T., Fadnes, T.O.M., Jakobsen, J.B., Gudmestad, O.T. (2020). A Study of Suspension Bridge Vibrations Induced by Heavy Vehicles. In: Pakzad, S. (eds) Dynamics of Civil Structures, Volume 2. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-030-12115-0_15
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DOI: https://doi.org/10.1007/978-3-030-12115-0_15
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