The Mechanical Analysis Of Simply-supported-continuous Idge System Transformation

The expressway had developed rapidly in virtue of the enhancement of comprehensive national power in our country. For the sake of the comfortable driving condition, bridges in the highway should have better continuous behavior and less expansion joints. The simply supported continuous beam bridges combined with the advantages of the continuous beam bridges and the precast beam bridges, so that it had been widely applied and developed.The method of structure system transformation construction is a new one in recent years, It has many problems to research and analysis for us. On the basis of the need for bridge engineering construction, the text does structure simulative analysis for every methods of the simply—supported—Continuous construction, and then Put for-ward the optimum scheme.The mainly works are as follows:1.Theory analysis and digital simulated computation.With mechanics theory、 concrete structural strength theory、and the relative theory of bridge structure, the text discusses the theory computation method of the bridge strain and stress.2.Use special bridge structural computation program(MIDAS CIVIL2011), the text does simulative analysis on every stage of the structural system construction. The text draws the character on force state and structural deformation of the structure style, at the same time, the text carries on deep research for the key procedure of the structural system transformation constructions; such as the pouring mode of the next continuous end concrete; the different joint construction sequence of the many spans beam; the connection mode of the next continuous end negative bending moment prestressed steel.3.The text systematically introduces the construction method、construction technology and quality control of the simply-supported-continuous system T beam bridge, and then Puts forward that the key construction procedure is the joint pouring and the system transformation.