^ Effects of Stochastic Excitation and Phase Lag of Pedestrians on Lateral Vibration of Footbridges | Structurae
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Effects of Stochastic Excitation and Phase Lag of Pedestrians on Lateral Vibration of Footbridges

Author(s):


Medium: journal article
Language(s): English
Published in: International Journal of Structural Stability and Dynamics, , n. 7, v. 18
Page(s): 1850095
DOI: 10.1142/s0219455418500955
Abstract:

Incidents of pedestrian-induced large lateral vibrations of footbridges reveal the occurrence of an instability-type phenomenon in pedestrian-induced vibration. However, the mechanism involved has yet to be clearly explained. In this work, a novel model for predicting the lateral vibration of footbridges is proposed. Under an algebraic framework of nonlinear stochastic vibration, the narrow-band vibration caused by the pedestrian intra-subject randomness and the phase lag between the footbridge motion and the pedestrian load are considered. The critical condition that triggers the large lateral vibration of the footbridge is identified using the stochastic averaging method and the concept of stability based on the Lyapunov exponent. The validity of the proposed method is confirmed through case studies of three bridges. Through a parametric analysis, the effects of several crucial parameters on the stability/instability of vibration are discussed. Finally, conclusions are drawn regarding insights that can be useful to the future designs of footbridges.

Structurae cannot make the full text of this publication available at this time. The full text can be accessed through the publisher via the DOI: 10.1142/s0219455418500955.
  • About this
    data sheet
  • Reference-ID
    10352198
  • Published on:
    14/08/2019
  • Last updated on:
    14/08/2019