Long-Term Vibration Serviceability Assessment of a Steelplated Stress-Ribbon Footbridge
Author(s): |
José M. Soria
Iván M. Díaz Jaime H. García-Palacios Antolín Lorenzana |
---|---|
Medium: | conference paper |
Language(s): | English |
Conference: | Footbridge 2017 Berlin - Tell A Story, 6-8.9.2017, Technische Universität Berlin (TU Berlin) |
Published in: | Footbridge 2017 Berlin - Tell A Story |
Year: | 2017 |
DOI: | 10.24904/footbridge2017.09698 |
Abstract: |
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. |
Keywords: |
dynamic behavior vibration serviceability assessment time-varying modal parameters human-induced vibrations
|
License: | This creative work is copyrighted. The copyright holder(s) do(es) not grant any usage rights other than viewing and downloading the work for personal use. Further copying or publication requires the permission of the copyright holder(s). |
Structures and Projects
Structure Types
0.72 MB Download full text file (PDF)
0.91 MB
- About this
data sheet - Reference-ID
10075340 - Published on:
01/09/2017 - Last updated on:
10/06/2021