Research on Design of Self-anchored Cable-stayed Suspension Bridge

The self-anchored cable-stayed suspension bridge was put forward based on analyzing the characteristics of earth-anchored cable-stayed suspension bridge in view of the bad natural conditions such as the soft foundation,the violent typhoon,and the deep-watered foundation which the Dalian harbor route faced with.For the main channel bridge of Dalian sea-crossing bridge with 800 m main span,the conceptual design and the structure were introduced;traits of the static and dynamic mechanics,erecting procedure,economic performance and fatigue of hanger cables at the connecting zone of both cable-stayed bridge and suspension bridge as well as the wind-resistant stability at the construction stage were all researched.Compared with suspension bridge and other structures,the result shows that the rational layout together with some measures such as auxiliary pier and the appropriate crossing of stay cables and hanger cables could make self-anchored cable-stayed suspension bridge with excellent mechanical properties and be fully suitable for deep sea and soft ground construction.