Side-Surface Openings Effect on Aerodynamic Performance of Box Girders in Tandem

A butterfly web girder is a box that has discretely distributed side-surface openings. Due to these openings, girders show better aerodynamic performance than conventional girders. This study aims investigate the effects of openings on instability when it placed in tandem with another girder. In addition, this whether one affected by an adjacent series wind tunnel tests will be carried out and girder, rigidly supported or respectively, at its upstream downstream side. The fixed increased galloping amplified vortex-induced vibration stabilized vibration, irrespective type downstream. independent upstream.