Análise de vibrações e avaliação de conforto humano sobre passarelas de pedestres mistas (aço-concreto) com base no emprego de modelos biodinâmicos.

Abstract

In Brazil, until recently, it was not common in design the pedestrian footbridges serviceability limit states verification when the human comfort is considered, with regard to the dynamic character of the people walking on the structure. However, as the main objective of the footbridges is the crossing of pedestrians, these structural models should present a proper dynamic behaviour, without risks of excessive vibrations or human discomfort. Thus, this research aims to study the dynamic response and proceed human comfort analysis of steel-concrete composite footbridges, when subjected to the human walking, based on the use of biodynamic models in order to simulate the pedestrians. The investigated structural model corresponds to a real pedestrian footbridge, built on Ayrton Senna Av., in the city of Rio de Janeiro/RJ, Brazil, presenting a central span with 68,6 m long. This way, this research work aims to develop a analysis methodology for the investigation of the dynamic structural behaviour of pedestrian footbridges, based on the numerical modelling, structural analysis, consideration of the effect of the pedestrian-structure dynamic interaction and, finally, an evaluation human comfort, based on the use of biodynamic models. The results obtained during the study have indicated a high degree of human discomfort when the pedestrians crossing the analysed structure.