Abstract
The uncertainty of the parameters involved in the bridge vortex-induced vibration (VIV) response is hard to be described accurately and the probabilistic description remains scarce. The present work aims at giving a contribution to the probabilistic evaluation of the bridge VIV response considering uncertainty influence of parameters. A self-anchored suspension bridge was selected as an example to analyze the uncertainty influence on the probabilistic evaluation of VIV response. The probability density function of the wind speed at the deck level of the bridge was established. The modal analysis was carried out and the natural vibration characteristics were checked. Then three performance functions involving different considerations of the maximum response models of bridge VIV were introduced. The numerical characteristics (coefficient of variation (COV), skewness and kurtosis) in the parameter space was propagated to access its influence on the exceeding probability of the bridge VIV response utilizing the second-order fourth-moment (SOFM) method. The influence from the different distribution type of the parameters was investigated. Results showed that the influence degree of COV, skewness and kurtosis of parameters on the exceeding probability of VIV response for the bridge is different and the distribution type of parameter has little effect based on the SOFM method.
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