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Operational Modal Analysis and Vibration Serviceability Assessment of a Footbridge

 Operational Modal Analysis and Vibration Serviceability Assessment of a Footbridge
Author(s):




Medium: conference paper
Language(s): English
Conference: 4th International Conference Footbridge 2011, Wroclaw, Poland, 6-8 July 2011
Published in:
Year: 2011
Abstract:

Due to the increasing strength of materials and the trend towards greater slenderness, modern pedestrian bridges are very often lively structures prone to human induced vibrations. Predicting the dynamic performance of these civil engineering structures due to crowd induced loading is an increasingly critical aspect of the vibration serviceability design process, for which reliable dynamical characteristics are of crucial importance.

This paper presents the extensive analysis of the vibration serviceability of a footbridge in Eeklo (Belgium). The operational modal analysis is performed to obtain the operational modal characteristics of the footbridge. These results are applied for the updating procedure of the numerical model (FE model) of the footbridge using the support stiffnesses as updating parameters. An optimal correspondence is found between measured and calculated modal characteristics, improving the accuracy of the numerical predictions of the dynamic response of the bridge to pedestrian loading.

The vibration serviceability check according to the current codes of practice is performed for both the initial versus the updated model of the footbridge. In some cases this results into a different evaluation (comfort class), indicating the difficulty of making a reliable assessment of the dynamic performance of a the footbridge in the design phase.

Keywords:
footbridge vibration serviceability operational modal analysis model updating crowd-induced loading
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
    10074193
  • Published on:
    25/10/2016
  • Last updated on:
    05/06/2024
 
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