The dynamic behavior of a butterfly-arch stress-ribbon pedestrian bridge located in Fuzhou, Fujian, China was investigated under ambient excitation. Highly synchronous tri-axial wireless sensors were used to get an estimate of the model parameters, finding eight stable modes with bending and torsional deformations in the frequency range 3.59-14.92 Hz. Different finite element models of the bridge were developed and a parametric optimization process with a sensitivity-based algorithm was performed to achieve the best model which could be used as baseline for a long-term monitoring of the bridge.
Investigation of a butterfly-arch stress-ribbon pedestrian bridge under ambient excitation: dynamic identification, FE modelling and parametric optimization / He, L.; Castoro, C.; Aloisio, A.; Zhang, Z.; Marano, G. C.; Gregori, A.; Deng, C.; Briseghella, B.. - In: PROCEDIA STRUCTURAL INTEGRITY. - ISSN 2452-3216. - 44:(2022), pp. 1594-1601. (Intervento presentato al convegno 19th ANIDIS Conference, Seismic Engineering in Italy tenutosi a Turin, ITALY nel SEP 11-15, 2022) [10.1016/j.prostr.2023.01.204].
Investigation of a butterfly-arch stress-ribbon pedestrian bridge under ambient excitation: dynamic identification, FE modelling and parametric optimization
Briseghella B.
2022
Abstract
The dynamic behavior of a butterfly-arch stress-ribbon pedestrian bridge located in Fuzhou, Fujian, China was investigated under ambient excitation. Highly synchronous tri-axial wireless sensors were used to get an estimate of the model parameters, finding eight stable modes with bending and torsional deformations in the frequency range 3.59-14.92 Hz. Different finite element models of the bridge were developed and a parametric optimization process with a sensitivity-based algorithm was performed to achieve the best model which could be used as baseline for a long-term monitoring of the bridge.
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