Stochastic and narrow band nature are the two essential features of vertical walking loading not addressed adequately in the existing design guidelines for pedestrian structures, such as footbridges, long-span floors and staircases. One of the reasons for this is the lack of a comprehensive database of walking forces in the form of continuously recorded time series that can be used for development of statistically reliable characterisation of these forces for application in the civil engineering context. This paper has addressed the issue by establishing a large database of measured walking time series recorded by a state-of-the-art in-stru-mented treadmill at the University of Sheffield. Another reason is the lack of an adequate modelling strategy which can simulate reliably the actual forcing signals. Here, a data-driven mathematical model has been developed to generate synthetic force signals with realistic temporal and spectral features. The modelling strategy takes a complex numerical approach, thus can be coded as a user-friendly soft-ware which can be adopted in the vibration serviceability design practice.
|Titolo:||Stochastic model of continuously measured vertical pedestrian loads|
|Autori interni:||RACIC, VITOMIR|
|Data di pubblicazione:||2012|
|Appare nelle tipologie:||04.1 Contributo in Atti di convegno|