Citation

Zhao L, Yaojun GE. Disaster Adv. 2013; 6(3): 32-40.

Copyright

(Copyright © 2013, Shankar Gargh)

DOI

unavailable

PMID

unavailable

Abstract

Using the present wind-induced buffeting theories and the stochastic finite element methods (SFEM), failure probability about complex structures such as long-span cable-stayed bridges, is computed considering its more realistic behaviors by means of combining parameter sensitivity analysis technique with advanced first-order reliability method (AFORM) in the light of mode shape iteration method. In this process, several key stochastic factors i.e. aerodynamic loading, material properties and geometry characters, are analyzed quantitatively. Then the general methodology of buffeting probability assessment for long-span bridges cable-stayed is proposed. Finally, the buffeting assessment of the East Sea Bridge is selected as a numerical example and a series of steps, including mean wind prediction, stochastic wind field simulation, stochastic buffeting analysis are carried out with some important conclusions, in which the effects about aerodynamic admittance functions, return periods and several other stochastic factors on buffeting failure probability for long-span cable-stayed bridges are compared.