Abstract
For their aesthetic values, both arches and stress-ribbon decks are widely used in design of pedestrian bridges. The combination of the two systems provides the solution of a self-anchored structure. In the current paper, the dynamic characteristics of a short-span stress ribbon and butterfly arch bridge are investigated by means of operational modal analysis. Ambient vibration of the bridge is recorded by using several highly-synchronous three-axial wireless accelerometers deployed on the bridge deck. Modal parameters, including natural frequencies, mode shapes and damping ratios are extracted from the measurements. By comparing the experimental modal results to their numerical counterparts obtained from a preliminary finite element model, interesting results are found both related to the flexibility of the whole system and the stiffness contribution of the non-structural elements. The findings also serve as the basis of the serviceability assessment of the pedestrian bridge.
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Acknowledgement
Prof. Guido De Roeck is acknowledged for his guidance during the first author’s post-doctoral research period at KU Leuven and Dr. Edwin Reynders for his instruction with the identification software MACEC. The financial supports from the Fuzhou municipal city under the research project “2017-G-67” and the Fuzhou University under the research project “XRC-1675” are also acknowledged.
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He, L., Zhang, Z., Marano, G.C., Briseghella, B., Xue, J., Ni, Z. (2020). Dynamic Characterization of a Stress Ribbon and Butterfly Arch Pedestrian Bridge Using Wireless Measurements. In: Arêde, A., Costa, C. (eds) Proceedings of ARCH 2019. ARCH 2019. Structural Integrity, vol 11. Springer, Cham. https://doi.org/10.1007/978-3-030-29227-0_41
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DOI: https://doi.org/10.1007/978-3-030-29227-0_41
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