Research About Simulating Method Of Steel Plate-Concrete Composite Beam Bridge And Stress Improve Method Of Bridge Deck In Negative Moment Zone

Steel-concrete Composite Beam Bridges has many advantages,such as flexibility,high efficiency,economy,environment friendly and so on.With the development of the science and technology,Steel-concrete Composite Beam Bridges will be further promoted and developed.In the engineering field,simulation plays an important role.So the research of simulation is very important.For steel-concrete composite continuous beam bridge,the mechanical behavior of concrete deck in negative moment zone is very complex.Taking full account of the time effect,it is easy to crack or get other diseases,which may cause damage to the structure,affect its service life and aesthetic appearance.Therefore,it is important to reduce the stress level of concrete bridge deck in steel plate-concrete negative moment zone.The main work and contributions in this dissertation show as follows:1)Introduced the history and current situation of Steel-concrete Composite Structure;2)Introduced the elastic analysis method and plastic analysis method widely used in the analysis theory of steel plate-concrete composite continuous beam bridge.3)Based on the structural mechanics,proposed an analytical method for solving the internal forces of statically indeterminate straight beams with variable cross-section;4)Using the method mentioned in 2),combined with the knowledge of material mechanics and structural mechanics,proposed a simulation modeling method of steel-concrete composite beam bridge;5)Study and analyze the improvement of stress level of concrete deck in negative moment zone of steel-concrete composite beam bridge and put forward relevant engineering solution.