Analysis Of Cable-Stayed Bridge With High And Low Towers And Single Central Cable Plane Using Integrated Finite Element Method

The cable-stayed bridge with high and low towers and single central cable plane is rare in China, its structure is original. Based on the design scheme of the Second Wujiang Bridge in Chongqing, this thesis focuses on discussing the problems of the static and dynamic behaviors, and stability characteristic for this style of bridge. Firstly, the author detailedly presents the process of building up a integrated finite element model for the Second Wujiang Bridge by MIDAS/CIVIL, a large-scale FEM software. Then the structure behaviors under loads of all construction stages and completed bridge stage are computed, especially analyzing the effects of dead loads, prestressing force, shrinkage, creep, changes of global temperature and local temperature. Seismic characteristics is studied by the response spectrum analysis, and the conditions between bridge with and without auxiliary piers which influence the stability are discussed. Therefore, the static, dynamic, and stable behavior and analysing method of cable-stayed bridge with high and low towers and single central cable plane are comprehensively understood.