Zhoushan Xihoumen Bridge with the World Record Span Length of Steel Box Girder, China

Connecting the two islands Jintang and Cezi in the Zhoushan Archipelago in the East China Sea, the Zhoushan Xihoumen Bridge was constructed as a two-span, continuous steel-box girder suspension bridge with a main span of 1650 m because deep-water foundation could be avoided. Since the bridge site is located in a typhoon-prone area with very high wind speed, the stiffening girder of the bridge was designed as a twin-box steel girder, innovatively adapted for the purpose of wind-resistant design. The design criteria, construction conditions and structural design of the bridge are systematically introduced in this paper.