Dynamic properties of two pedestrian woodn bridges incluiding seasonal effects
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Other documents of the author: Hallak, John; Ibisevic, Aida; Ugur, Hasanhüseyin; Battini, Jean-Marc; Crocetti, Roberto; Pacoste, Costin; Martínez-Rodrigo, María D.
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7035
comunitat-uji-handle3:10234/146090
comunitat-uji-handle4:
INVESTIGACIONMetadata
Title
Dynamic properties of two pedestrian woodn bridges incluiding seasonal effectsAuthor (s)
Date
2020-09Publisher
National Technical University of Athens (NTUA). Institute of Structural Analysis and Antiseismic ResearchISBN
978-618-85072-2-7 (Set); 978-618-85072-0-3 (Vol. I)Bibliographic citation
Hallak, P. et al. “Dynamic properties of two pedestrian woodn bridges incluiding seasonal effects”. In: Papadrakakis, M.; Fragiadakis, M.; Papadimitriou, C. (Eds.). EURODYN 2020. Proceedings of the XI International Conference on Structural Dynamics, Streamed from Athens, Greece, 23-26 November 2020. Athens: Institute of Structural Analysis and Antiseismic Research, School of Civil Engineering, National Technical University of Athens (NTUA), 2020. Vol. I. ISBN 978-618-85072-0-3, pp. 1805-1813Type
info:eu-repo/semantics/conferenceObjectPublisher version
https://eurodyn2020.org/Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
The dynamic properties of two pedestrian wooden bridges situated in the Stockholm
area have been determined experimentally. The main purpose was to investigate if these
properties are season dependent. For that, ... [+]
The dynamic properties of two pedestrian wooden bridges situated in the Stockholm
area have been determined experimentally. The main purpose was to investigate if these
properties are season dependent. For that, tests were performed during the winter and the
spring. 17 accelerometers were used to measure both vertical and horizontal vibrations. An
impact hammer was used to excite the bridges. For the Vega bridge, a large variation for the
lowest natural frequencies was observed, both for the first vertical and for the first transversal
mode. For the Hägernäs bridge, a large variation was observed for the first transversal
mode but not for the first vertical mode. With exception for the first transversal mode for the
Hägernäs bridge, no significant differences regarding the damping between winter and spring
were observed. Finite element models of the two bridges have also been implemented and a
good agreement with experimental results have been obtained. The numerical models have
shown that the connections between the different components of the bridges have a significant
influence on the dynamic properties. The models have also shown that the variation of the
stiffness for the asphalt layer may explain the differencies for the natural frequencies between
spring and winter. However, due to the incertainties in the modelling of the asphalt, this conclusion
must be taken with caution. [-]
Description
Ponència presentada al XI International Conference on Structural Dynamics (Eurodyn 2020), del 23 al 26 de novembre de 2020