PROBABILISTIC MODEL OF HUMAN WALKING ACTION FOR DYNAMIC ANALYSIS OF PEDESTRIAN BRIDGES
Palavras-chave:
Human loading simulation, walking, probabilistic modelResumo
The recent use of new materials and innovative structural designs in pedestrian bridges has
been resulting in structures with low natural frequencies susceptible to excessive vibration problems,
requiring a dynamic analysis in the design phase. In the present work, dynamic analyzes were
performed considering initially deterministic models with two distinct formulations of the human
loading simulation, Fourier series and biodynamic model, the latter to evaluate the relevance of the
person-structure interaction in the structural response. To simulate the typical random characteristics
of human walking loading, a probabilistic model was also implemented for the simulation of loading
parameters. The theoretical results, considering the deterministic and probabilistic models for the two
human loading formulations, were correlated with the experimental results of controlled human
walking vibration tests (one and four persons walking on the fundamental frequency of the pedestrian
bridge) and in normal operation. The best correlation between the theoretical and experimental results
was obtained for the probabilistic model of the loading parameters considering the biodynamic
formulation.
