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Buffeting Response of Bridges

by F. J. Wall, Univ of Innsbruck, Austria,



Document Type: Proceeding Paper

Part of: Structural Safety and Reliability

Abstract:

The present study provides a theoretical analysis of the behavior of the response of long-span bridges to turbulent wind loads in the region of stable motion. The analysis is based on a linear structural model capable of one uncoupled torsional mode. Based on the assumption that the turbulent components of the wind flow may be represented by weakly stationary wideband random processes an amplitude/phase formulation is utilized. Employing a modified stochastic averaging procedure the probability density functions for the buffeting response quantities in the stationary state are obtained. Furthermore the expected rate of threshold crossings from below and the exceedance probabilities are evaluated.

Subject Headings: Wind loads | Span bridges | Probability | Stochastic processes | Markov process | Stationary processes | Dynamic structural analysis

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