Wind-Induced Vibration Analysis In Time Domain For Long Span Cable-Stayed Bridge

Long span cable-stayed bridge is one of the most important modern bridge type. As a result of increasing bridge span, deck flexibility and structure complexity, wind-induced vibration of long span cable-stayed bridge becomes one of the most concem and challenge problems in bridge engineering field.Analysis of wind-induced vibration for long span cable-stayed bridges has two aims: the first is to ensure an enough safety margin against fluttering, i.e., to ensure bridge stability against wind action; the second is to require that the buffeting amplitude is limited so as to avoid structure fatigue, discomfort problems and high driving endanger etc.Lots of investigations on bridge deck fluttering show that the aerodynamic stability of cable-stayed bridge can be controlled by aerodynamic measures. On the other hand the bridge deck buffeting under turbulence wind is another problem for wind resistance design.The classical frequency-domain theory forms a basis of bridge buffeting analysis, however such method has some limitations. Some literatures show that the time-domain analysis method has advantages for buffeting analysis. Because of the research on time-domain buffeting analysis developed only in recent years and the theory isn't perfect...