Assessment of Lateral Vibrations of Footbridges Using a Frequency Domain Approach

Cuevas, Rocío and Martínez Cutillas, Francisco Javier and Muñoz Díaz, Iván (2018). Assessment of Lateral Vibrations of Footbridges Using a Frequency Domain Approach. In: "Conferencia DinEst 2018.- 1ª Conferencia de dináminca estructural", 20-21 junio 2018, Madrid, España. ISBN 9788409017331. pp. 127-131.

Description

Title: Assessment of Lateral Vibrations of Footbridges Using a Frequency Domain Approach
Author/s:
  • Cuevas, Rocío
  • Martínez Cutillas, Francisco Javier
  • Muñoz Díaz, Iván
Item Type: Presentation at Congress or Conference (Other)
Event Title: Conferencia DinEst 2018.- 1ª Conferencia de dináminca estructural
Event Dates: 20-21 junio 2018
Event Location: Madrid, España
Title of Book: Proceedings of the DinEst 2018
Date: 2018
ISBN: 9788409017331
Subjects:
Freetext Keywords: Footbridges Lateral Vibration, Frequency Domain Analysis, Response Amplification
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Mecánica de Medios Continuos y Teoría de Estructuras
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Lateral vibrations of footbridges caused by the passage of pedestrian crowds have been the object of many studies over the last decade. However, the connection between experimental and analytical results remains tenuous and as a consequence, a common set of design criteria havenot been established yet.Regarding the particular features of both the pedestrian load and the dynamic system (slender footbridges with little damping), the frequency domain analysis is a method especially efficient to evaluate the lateral response. Hence, the object of this study is to develop a general formulation, using a frequency domain approach, for assessing the lateral vibrations of any footbridge; considering the action of a crowd of pedestrians walking randomly with different frequencies. The effects of pedestrians in a swaying deck are not limited to imposing external loads; the people-structure interaction generates additional harmonics in the natural frequencies of the structure that are independent of the pedestrian frequency. Hence, human-structure phase synchronization is not a necessary condition for the development of the resonant component. The study states thatit is accurate enough to calculate the structural response using only the resonant contribution.These considerations lead to a very simple formulation that permits to establish a positive relationship between the amplification of the response and the number of pedestrians.

More information

Item ID: 64721
DC Identifier: http://oa.upm.es/64721/
OAI Identifier: oai:oa.upm.es:64721
Deposited by: Memoria Investigacion
Deposited on: 16 Oct 2020 17:27
Last Modified: 19 Oct 2020 06:56
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