Sensitivity Study of Stochastic Walking Load Models

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Abstrakt

On flexible structures such as footbridges and long-span floors, walking loads may generate excessive structural vibrations and serviceability problems. The problem is increasing because of the growing tendency to employ long spans in structural design. In many design codes, the vibration serviceability limit state is assessed using a walking load model in which the walking parameters are modelled deterministically. However, the walking parameters are stochastic (for instance the weight of the pedestrian is not likely to be the same for every footbridge crossing), and a natural way forward is to employ a stochastic load model accounting for mean values and standard deviations for the walking load parameters, and to use this as a basis for estimation of structural response. This, however, requires decisions to be made in terms of statistical istributions and their parameters, and the paper investigates whether statistical distributions of bridge response are sensitive to some of the decisions made by the engineer doing the analyses. For the paper a selected part of potential influences are examined and footbridge responses are extracted using Monte-Carlo simulations and focus is on estimating vertical structural response to single person loading.
OriginalsprogEngelsk
TitelProceedings of the IMAC-XXVIII : A Conference & Exposition on Structural Dynamics, February 1- February 4, 2010, Jacksonville, Florida, USA
Antal sider8
ForlagSociety for Experimental Mechanics
Publikationsdato2010
ISBN (Elektronisk)9781935116042
StatusUdgivet - 2010
BegivenhedInternational Modal Analysis Conference - IMAC-XXVIII - Jacksonville, Florida, USA
Varighed: 1 feb. 20104 feb. 2010

Konference

KonferenceInternational Modal Analysis Conference - IMAC-XXVIII
LandUSA
ByJacksonville, Florida
Periode01/02/201004/02/2010
NavnIMAC : A Conference & Exposition on Structural Dynamics
Nummer28

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Emneord

  • Walking Loads
  • Vibration Serviceability
  • Footbridge Vibrations

Citationsformater

Pedersen, L., & Frier, C. (2010). Sensitivity Study of Stochastic Walking Load Models. I Proceedings of the IMAC-XXVIII: A Conference & Exposition on Structural Dynamics, February 1- February 4, 2010, Jacksonville, Florida, USA Society for Experimental Mechanics. IMAC : A Conference & Exposition on Structural Dynamics, Nr. 28