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Dynamic Response of Girder Footbridges with Supplemental Damping

 Dynamic Response of Girder Footbridges with Supplemental Damping
Author(s):


Medium: conference paper
Language(s): English
Conference: Footbridge 2017 Berlin - Tell A Story, 6-8.9.2017, Technische Universität Berlin (TU Berlin)
Published in:
Year: 2017
DOI: 10.24904/footbridge2017.09827
Abstract:

Pedestrian-induced vibration commonly governs serviceability criteria in footbridge design. Simplified approaches to assess these vibrations have resulted in undesirable levels of vibration in built footbridges, highlighting the need to develop more realistic representations of the pedestrian loads as well as approaches to mitigate their effects. To represent these types of loads in an accurate manner it is necessary to consider the anthropometric characteristics (inter-subject variability), the inability that pedestrians have to transmit the same force in each step (intra-subject variability), the interaction between pedestrians and the lock-in effect. It has been observed that some footbridges have experiences serviceability problems due to vibrations with excessive magnitudes. In some of these cases, the human-induced vibration cannot be controlled effectively by using conventional approaches so the use of supplemental damping devices was required. Evaluation of the dynamic response at the design stage under the most realistic representation of pedestrian is crucial to satisfying the comfort criteria. After this evaluation, in cases where the comfort criteria is not fulfilled, an option available to designers is to employ supplemental damping devices to mitigate the pedestrian-induced vibrations. This work presents a parametric study showing the high efficiency of damping devices to mitigate human-induced vibrations in girder footbridges under diverse pedestrian loading scenarios.

Keywords:
dynamic response tuned mass dampers girder footbridges human-induced vibration serviceability criteria
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).

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  • About this
    data sheet
  • Reference-ID
    10075368
  • Published on:
    01/09/2017
  • Last updated on:
    05/06/2024
 
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