Influence Factors Analysis of Buffeting Response of Self-Anchored Cable-Stayed Suspension Bridge

Self4anchored cable4stayed suspension Bridges ，as a new type of bridge is rarely investigated. Based on simulating turbulent wind fields, the effects of some factors such as geometrical nonlinearity, lateral aerodynamic memory effect, and fluctuating wind on main cables on buffeting response of the Dalian Harbor Sea4routine Bridge, a self4anchored cable4stayed su spension with 800m main span, are analyzed and the characteristics of buffeting response for the new type of bridge are summarized. It is worthy of concern in results that fluctuating winds on the cables causes the vibration of main cables and brings coupling vibration of the stiffing girder, which makes a greater effect on the girder of a self4anchored cable4stayed suspension bridge than those on the girder of a general suspension bridge.