A Suspension Footbridge Model under Crowd-Induced Lateral Excitation
Joint Authors
Zhen, Bin
Ouyang, Lijun
Ding, Bin
Li, Tingting
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-01-02
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
In this paper, a plane pendulum model is proposed to investigate the lateral vibration of a suspension bridge under crowd excitation.
The plane model consists of two strings and a rigid body, which represent cables and the bridge deck, respectively.
The lateral force induced by crowd is expressed as a cosine function with random phase.
Comparing with other existing pedestrian-footbridge interaction models, the proposed model has two features: one is that the structural characteristics of the suspension bridge are taken into account.
The other is that the expression of the lateral force induced by crowd has a unified form for different lateral bridge amplitudes.
By numerically analyzing the solution stability of the plane model, we exhibit the whole changing process how a suspension bridge increases its lateral amplitude from small to large.
It is shown that the worst case occurs when the lateral natural frequency of the bridge is half the lateral step frequency of the pedestrians.
Based on the analysis results, the plane pendulum model can be easily used to explain why the central span of the London Millennium Bridge has large lateral oscillations at about 0.48 Hz.
American Psychological Association (APA)
Ouyang, Lijun& Ding, Bin& Li, Tingting& Zhen, Bin. 2019. A Suspension Footbridge Model under Crowd-Induced Lateral Excitation. Shock and Vibration،Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1211563
Modern Language Association (MLA)
Ouyang, Lijun…[et al.]. A Suspension Footbridge Model under Crowd-Induced Lateral Excitation. Shock and Vibration No. 2019 (2019), pp.1-11.
https://search.emarefa.net/detail/BIM-1211563
American Medical Association (AMA)
Ouyang, Lijun& Ding, Bin& Li, Tingting& Zhen, Bin. A Suspension Footbridge Model under Crowd-Induced Lateral Excitation. Shock and Vibration. 2019. Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1211563
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1211563