A minimum design methodology for evaluating bridge flutter and buffeting response

Abstract Over the past two decades, significant advances have been made in understanding the aeroelastic behavior of long-span bridge structures. Using a combination of basic wind-tunnel experimental testing and analytical modeling, the response of such structures to both smooth and turbulent winds can now be predicted with some degree of confidence. Unfortunately, due to the nature of the analysis involved, the required calculations are often lengthy and complex. Thus, while the state-of-the-art in this aspect of bridge analysis is quite advanced, it does not represent that which is necessarily used by practising engineers. To address this shortfall, this paper presents an overview of the pertinent steps and calculations required such an analysis. A basic analytical procedure for response estimation is outlined. In addition, the various techniques (analytical and experimental) available are described. An example of application is presented for a cable-stayed bridge, now under construction.