Human-structure interaction effects on the maximum dynamic response based on an equivalent spectral model for pedestrian-induced loading

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Bassoli, E.^1 ; Van Nimmen, K.^2,3 ; Vincenzi, L.^1 ; Van Den Broeck, P.^3

University of Modena and Reggio Emilia, Department of Engineering Enzo Ferrari, Modena, Italy^1

KU Leuven, Department of Civil Engineering, Structural Mechanics Section, Leuven, Belgium^2

KU Leuven, Department of Civil Engineering, Technology Cluster Construction, Structural Mechanics and Building Materials Section, Technology Campus Ghent, Belgium^3

关键词: Accurate prediction;    Analytical expressions;    Frequency response functions;    Human-structure interaction;    Lumped parameter models;    Mechanical interactions;    Supporting structure;    Vibration serviceability;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012031/pdf
DOI  :  10.1088/1742-6596/744/1/012031

来源: IOP

【 摘 要 】

This paper investigates the effects of the human-structure interaction (HSI) on the dynamic response based on a spectral model for vertical pedestrian-induced forces. The spectral load model proposed in literature can be applied for the vibration serviceability analysis of footbridges subjected to unrestricted pedestrian traffic as well as in crowded conditions, however, in absence of HSI phenomena. To allow for a more accurate prediction of the maximum structural response, the present study in addition accounts for the vertical mechanical interaction between pedestrians, represented by simple lumped parameter models, and the supporting structure. By applying the classic methods of linear random dynamics, the maximum dynamic response is evaluated based on the analytical expression of the spectral model of the loading and the frequency response function (FRF) of the coupled system. The most significant HSI-effect is in the increase of the effective damping ratio of the coupled system that leads to a reduction of the structural response. However, in some cases the effect of the change in the frequency of the coupled system is more significant, whereby this results into a higher structural response when the HSI-effects are accounted for.