Static Characteristics Research Of Single Tower Cable-stayed Bridge Hybrid Girder

As the improving of people's living standards and the developing of science and technology, hybrid girder cable-stayed bridge is showing strong vitality due to its unique structure and technical characteristics, and it is widespread used abroad. Compare with other types of bridge, hybrid girder cable-stayed bridge is different from them as: there are two different materials used in main span and side-by span, just as side-by span girder is built in prestressed concrete and main span girder is built in all steel or partial steel. This kind of cable-stayed bridge make the arrangement of span and the golbal force reasonable.Base on DongSha bridge in the eastern of GuangZhou city, this paper build global bridge model to analyse the static characteristics of the siuaion, and then fix the rational ratio of main span and side-by span, and furthermore, the local model of mixed segement in the girder where the materials are changed is built analysis the local stress status. In this paper, focusing on mixed-beam characteristics of static start inquiry study , The main research work covers the following aspects:1,The introduce of Steel girder cable-stayed bridge in the development of mixed overview and research status,also steel cable-stayed bridge mix the characteristics of the static analysis.2,The establishment of the entire bridge model, Cable-stayed bridge in detail the finite displacement theory, and analysis of cable-stayed bridge a variety of reasons for non-linear factors and its analysis method3,Measured through a combination of the construction section of the process of elevation, cable force, temperature, etc., in accordance with the measured data analysis paragraph of steel-concrete composite effect of local temperature4,The research of local stress in steel and concrete mixed segment: Using of partial model space entities paragraph of steel-concrete composite ,construction of control integration in the process of combining data measured under different conditions in the above static analysis of the characteristics.5,Through the single-tower cable-stayed steel bridge beams mixed state analysis of the sensitivity of parameters,Come to a bridge-related parameters on the force and displacement.