Modern footbridges can be very sensitive to walking-induced vibrations. The assessment of footbridge vibrations due to normal unrestricted pedestrian traffic is a topical problem in the serviceability analysis of these structures. Based on a probabilistic model of unrestricted pedestrian traffic, the authors have deduced analytically a spectral model for the modal force induced by pedestrian groups, modeled as a stationary random process; simple closed-form expressions for the evaluation of the maximum dynamic response have also been provided. In the present paper, starting from a non-dimensional form of the proposed spectral model, a deep analysis of the role of the involved stochastic parameters is carried out. Furthermore, analytical results obtained adopting the proposed spectral forcing model are compared with the results of an experimental campaign carried out on a real footbridge.
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|Titolo:||The role of walking parameter variability in serviceability assessment of footbridges|
|Data di pubblicazione:||2012|
|Appare nelle tipologie:||04.01 - Contributo in atti di convegno|