The wind-induced fatigue damage, is evaluated in the main cables and in the hangers of a long-span suspension bridge through numerical simulations. The turbulent wind field is modeled as a multivariate stochastic process. The fatigue damage is calculated, in the time domain, through an adequate cycles counting method. The main topics under investigation are: the effects of the wind forces formulation on the bridge response and the relation between the fatigue damage and the mean wind velocity. Those results may be, in fact, of interest in monitoring applications towards maintenance decisions. The case study structure is the Tsing Ma Bridge located in Hong Kong, China. A nonlinear three-dimensional finite element model of the bridge was developed and validated, at first, on the basis of experimental literature results.
Wind-induced fatigue assessment in the main cables and hangers of suspension bridges
UBERTINI, Filippo;
2008
Abstract
The wind-induced fatigue damage, is evaluated in the main cables and in the hangers of a long-span suspension bridge through numerical simulations. The turbulent wind field is modeled as a multivariate stochastic process. The fatigue damage is calculated, in the time domain, through an adequate cycles counting method. The main topics under investigation are: the effects of the wind forces formulation on the bridge response and the relation between the fatigue damage and the mean wind velocity. Those results may be, in fact, of interest in monitoring applications towards maintenance decisions. The case study structure is the Tsing Ma Bridge located in Hong Kong, China. A nonlinear three-dimensional finite element model of the bridge was developed and validated, at first, on the basis of experimental literature results.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
