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Vertical Accelerations due to Joggers of a Short Span Footbridge

 Vertical Accelerations due to Joggers of a Short Span Footbridge
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/footbridge2017.09424
Abstract:

A prescribed approach according to the Eurocode to calculate the expected vertical accelerations of a footbridge due to joggers is to model a harmonic oscillating point load at midspan, representing the joggers, and calculate the outcome of the steady-­state solution. This is true for footbridges with a long span, but when looking at short span footbridges, the steady-­state solution overestimates the occurring vertical accelerations of the footbridge in reality by far. In case of short span footbridges the calculated vertical accelerations during the transient-­state, approaches reality better.

An analytical model is made of a moving harmonic oscillating point load in time, representing a jogger running across a footbridge. The vertical accelerations are calculated at midspan of the footbridge.

The results of the analytical model show good agreement with the results measured at midspan in reality, proving a steady-­state solution overestimates the expected vertical accelerations of a short span footbridge when a jogger runs across the footbridge.

Keywords:
footbridge resonance vibrations dynamics response jogger running harmonic steady state transient state slender bridges short span moving point load vertical accelerations
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
    10075288
  • Published on:
    01/09/2017
  • Last updated on:
    05/06/2024
 
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