Citation

Zhao L, Ge YJ. Disaster Adv. 2013; 6(2): 25-30.

Copyright

(Copyright © 2013, Shankar Gargh)

DOI

unavailable

PMID

unavailable

Abstract

Based on the current buffeting theories and reliability assessment methods, a numerical simulation approach to the first passage probability for a long-span bridge under buffeting actions is developed. The response spectrum analysis method is first adopted to calculate buffeting response in the frequency domain. The time history of structural responses induced by buffeting is numerically simulated by trigonometry series compose approach based on the buffeting spectrum results. While a large amount of samples are generated by Monte-Carlo simulation technique, it is relatively easy to numerically obtain the probability of first passage failure in buffeting responses of a long-span bridge. Two numerical examples referring to buffeting deflections of Jiangyin Suspension Bridge and Yangpu Cable-stayed Bridge in China have been considered. Compared with the corresponding results of three approximately analytical approaches, it can be concluded that the proposed numerical method is quite precise and effective in their use and hence can be exactly used in calculating, especially in detailed design stages, the probability of bridge buffeting responses surpassing the prescribed safety barriers during its service time.