A coupled biodynamic model for crowd-footbridge interaction

Toso, Marcelo André; Gomes, Herbert Martins

doi:10.1016/j.engstruct.2018.09.033

Cited by 13 publications

(11 citation statements)

References 14 publications

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“…This makes possible to analyze the structural behaviour according to distinct crowd densities in a systematic way. Toso and Gomes [4] proposed this model, where a biodynamic model with synchronization of the three force components applied in space (positions where they should be applied) and in time (peak and valleys of the three force components occurring at the proper time) was presented. This biodynamic model is coupled continuously with the structure's FE Model.…”

Section: Biodynamic Synchronized Coupled Modelmentioning

confidence: 99%

“…The model proposed allows assessing interactions with both rigid and flexible structures. Toso and Gomes [4] presented a complete description of the model; here it is showed some equations to evaluate the pedestrian structure interaction.…”

Section: Biodynamic Synchronized Coupled Modelmentioning

confidence: 99%

“…This paper presents a study on the interaction between walking pedestrians and a flexible footbridge. The paper uses some previous investigation results (Toso et al [3] and Toso and Gomes [4]). A Biodynamic Synchronized Coupled Model (BSCM) is used to analyze the pedestrian structure interaction.…”

Section: Introductionmentioning

confidence: 99%

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Biodynamic Synchronized Coupled Model for Crowd-Footbridge Interaction

Toso¹,

Gomes²

2021

European Journal of Formal Sciences and Engineering

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Nowadays there are growing interests in vibration serviceability assessments of composite footbridges. The new design trends of composite footbridges make them slender civil structures that may be affected by the load action of walking pedestrians resulting in large deflections or even uncomfortable vibrations. Furthermore, the presence of people on the footbridges causes the addition of mass to the structural system and due to the human body’s ability to absorb vibrational energy, an increase in structural damping. In this paper, the interaction between pedestrian and structure is modelled using data from pedestrian characteristics and vibration data from a measured footbridge as a comparison basis. A previously developed numerical model was used, this model called Biodynamic Synchronized Coupled Model (BSCM) consists of a fully synchronized force model in the longitudinal and lateral direction of pedestrian’s movement and a biodynamic model with mass, damping and stiffness parameters. The model is coupled with the structure using the Finite Element Method at the feet’s contact points. Pedestrians are treated as individuals with intrinsic kinetic and kinematic parameters following a measured correlation matrix obtained by the use of an especially designed force platform. Finally, the adequacy of the proposed model to represent the pedestrians as BSCM for the walking effects on the structure is investigated by experimentally measured accelerations on a footbridge (freely walking). The numerical results show good agreement with the experimental results.

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Section: Biodynamic Synchronized Coupled Modelmentioning

confidence: 99%

Section: Biodynamic Synchronized Coupled Modelmentioning

confidence: 99%

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Biodynamic Synchronized Coupled Model for Crowd-Footbridge Interaction

Toso¹,

Gomes²

2021

European Journal of Formal Sciences and Engineering

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“…With regard to Equations (10) and (11), cc is the conjugate complex number of the preceding expressions. Equations (10) and (11) are inserted into Equation (9) to derive:…”

Section: Dynamic Coupling Equation Solution Of the Lateral Interactiomentioning

confidence: 99%

“…Comparing the existing experimental results, it was found that the tandem three-degree-of-freedom human model is closer to the experimental results. A new biodynamic synchronized coupled model is based on a measured footbridge on a comparative basis [10]. In a study by Zhang M et al [11], pedestrian excitation was considered to model the structure-human body model-damping of Phase Angle interactions based on biomechanics.…”

Section: Introductionmentioning

confidence: 99%

A Study on a Mechanism of Lateral Pedestrian-Footbridge Interaction

Zhou

Chen

et al. 2019

Applied Sciences

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Based on the pedestrian lateral force hybrid Van der Pol/Rayleigh model, this study investigates the interaction dynamic model of a pedestrian-flexible footbridge lateral coupling system. A multi scale method is adopted to decouple the equation. The paper also studies the nonlinear dynamic response of the pedestrian-footbridge coupling system as well as the relationship between the lateral displacement of pedestrians and flexible footbridges, and the lateral interaction of the two variables. The results show that with the same frequency tuning parameters, when the mass ratio of pedestrians and footbridges is very small, the larger the mass ratio is, the larger the lateral response amplitude of pedestrians becomes. Conversely, when the mass ratio of pedestrians and footbridges is much larger, the larger the mass ratio is, the smaller the response amplitude becomes. When the natural frequency of a footbridge is larger, its Phase Angle becomes larger. As the lateral amplitude of pedestrians increases, the Phase Angle approaches zero. Moreover, regarding the variation of the Phase Angle between the interaction force and footbridge lateral vibration speed based on the lateral relative displacement of pedestrians, of which the variation range is (0, π ), as the pedestrians’ lateral amplitude increases, the Phase Angle approaches − π / 2 . The dynamic load coefficient varies linearly with the lateral amplitude of pedestrian vibrations.

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Vibration Serviceability of Two-Story Office Building: A Finite Element Modeling

Al-Badour

2022

Lecture Notes in Civil Engineering

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A coupled biodynamic model for crowd-footbridge interaction

Cited by 13 publications

References 14 publications

Biodynamic Synchronized Coupled Model for Crowd-Footbridge Interaction

Biodynamic Synchronized Coupled Model for Crowd-Footbridge Interaction

A Study on a Mechanism of Lateral Pedestrian-Footbridge Interaction

Vibration Serviceability of Two-Story Office Building: A Finite Element Modeling

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