Long-Term Vibration Serviceability Assessment of a Steelplated Stress-Ribbon Footbridge
![Long-Term Vibration Serviceability Assessment of a Steelplated Stress-Ribbon Footbridge](https://files.structurae.net/files/covers/10.24904/footbridge2017.09698.jpg)
Auteur(s): |
José M. Soria
Iván M. Díaz Jaime H. García-Palacios Antolín Lorenzana |
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Médium: | papier de conférence |
Langue(s): | anglais |
Conférence: | Footbridge 2017 Berlin - Tell A Story, 6-8.9.2017, Technische Universität Berlin (TU Berlin) |
Publié dans: | Footbridge 2017 Berlin - Tell A Story |
Année: | 2017 |
DOI: | 10.24904/footbridge2017.09698 |
Abstrait: |
The research group is working on vibration cancellation of pedestrian structures with time varying modal properties. As a previous step of the design and installation of a semi-active vibration control device (e.g. semi-active tuned mass damper), the Vibration Serviceability Assessment (VSA) of a real case of time-varying modal-parameter footbridge is studied throughout this paper. The structure is a steel-plated stress-ribbon footbridge sited in Valladolid (Spain). This structure is particularly lively in vertical direction exhibiting several closely-space vibration modes with similar natural frequencies that might be excited by human excitation. A continuous vibration monitoring system that measures the acceleration and the environmental factors was installed and one-year measuring raw data is analysed here. From the modal analysis of the structure, the location of the control device is proposed. Then, the long-term VSA for this particular location is carefully analysed. Thus, predictors described in general standards for human exposure evaluation to whole-body vibration are used. Time histories and circular hourly distribution charts are derived from the whole-year data. The results show periods of time where the structure undergoes excessive accelerations, motivating thus the installation of a vibration absorber. |
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sur cette fiche - Reference-ID
10075340 - Publié(e) le:
01.09.2017 - Modifié(e) le:
10.06.2021