Research on Wind-Resistant Capability of Two Common Section Forms for Long Span Bridges

Long span bridges have two main section forms including streamlined closed steel box girder and twin steel box girder. In order to compare the wind-resistant capacity, the finite element software ANSYS is adopted to establish the calculation structural models of Third Bosphorus Bridge respectively with two kinds of sections in the same width. According to the analysis of the wind-induced internal force and the flutter stability, the respective advantages of the two section forms in terms of wind-resistant capability are discussed. The analysis results could be used as reference in the section design of long span bridges.