Vibration serviceability assessment of the world's longest suspended footbridge in 2020
This paper investigates the vibrations induced by humans through in situ behaviour tests of the 516 Arouca footbridge (Portugal), the world's longest span in 2020 (516 m). The study consists of in situ experimental tests in which the structure was subjected to wind and pedestrian loads. The bri...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universidad de Sevilla (US) |
| Repositorio: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/137101 |
| Acceso en línea: | https://hdl.handle.net/11441/137101 https://doi.org/10.1016/j.istruc.2022.08.015 |
| Access Level: | acceso abierto |
| Palabra clave: | Experimental analysis FE model Human perception Human-induced vibrations In situ testing Modal identification Pedestrian traffic Survey Suspended footbridge |
| Sumario: | This paper investigates the vibrations induced by humans through in situ behaviour tests of the 516 Arouca footbridge (Portugal), the world's longest span in 2020 (516 m). The study consists of in situ experimental tests in which the structure was subjected to wind and pedestrian loads. The bridge is first described, to provide design and construction details, after which its dynamic behaviour is evaluated. The estimated natural frequencies were found to be similar to those previously computed by the finite element method. In addition, modal damping ratios and scaling factors are given. The dynamic responses due to pedestrian loads are then analysed. The damping ratios were found to increase with higher structural response, which highlights the dependence of the damping ratio on the amplitude of the structural response. Pedestrian comfort was evaluated by analysing the amplitudes and accelerations of the vibrations and complemented by applying a survey to the visitors. The results of the in situ tests showed that the bridge can provide users with a challenging and rewarding experience as they cross it, without suffering displacements and accelerations that they might find unnerving. |
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