The Development and Theoretical Research Analysis of Extradosed Bridge

The extradosed bridge, which began in Japan in the early 1990s, started relatively late in China. The extradosed bridges have the characteristics of rigidity and flexibility, and it accords with the mechanics law of the structure. It has attached more attention and has widely application prospects. This paper first introduces some extradosed bridge built at home and abroad. And then by reviewing current researches about the extradosed bridge, it is found that the theoretical research on this bridge type is constantly emerging. The research results and engineering practice applications mainly focus on the line of main beam, construction control technology and mechanical behaviour research. Finally, it is concluded that the research on the bridge type can further explore and research in the preparation of special design codes, construction technical regulations, calculation theory of concrete shrinkage and creep effects and prestress loss.