Flutter analysis methods for bridges stabilized with eccentric wings

Analysis methods for computing the flutter speed of bridges stabilized against by stationary wings are presented. The placed outboard bridge deck to achieve a large lateral eccentricity, which enables them produce enough aerodynamic damping effectively raise speed. Given focus on flutter, other wind effects neglected. analysis can thus be carried out in frequency domain. most sophisticated method is based specially developed finite aeroelastic beam element, used modelling bridge-deck-plus-wings segment, leading multi-degree-of-freedom analysis. Such recommended if do not extend over full length bridge, design choice that benefits cost efficiency. Second, simplified two-degree-of-freedom described. Simplification achieved establishing forces assuming quasi-steady, instead unsteady, flow and taking into account as additional stiffness. Results example calculations compared those Finally, it shown how torsional equipped with such treated single-degree-of-freedom applied first Tacoma Narrows Bridge. • Three different degrees sophistication. Finite element simultaneously wings. Multi-degree-of-freedom analyses using elements. Two-degree-of-freedom quasi-steady Single-degree-of-freedom prone flutter.