Mechanical Performance Study On Curved Steel Bridges Under The Incremental Launching Construction Stage And Completed State

In the modern city bridge construction, due to the limitation of various factors, bridge incremental launching construction method has been widely applied because of its unique advantage. Concrete bridge in incremental launching construction has obtained a better stress calculation method, and the steel bridge incremental launching construction of the stress analysis research is relatively small, and the lack of corresponding design guidelines of small radius curve steel bridge. So it is necessary to study on stress and deformation of the steel bridge incremental launching construction.This article mainly studies on steel bridge incremental launching construction for the analysis of forces and deformations of main girder, second analysis the effect on completed stage under adverse load effect on the bearing.â‘  This paper firstly introduces the research content of the project, and then describes the bridge incremental launching construction schemes, pushing the key problems and pusher transvers orientation correction problem. According to the curve of the steel box girder jacking construction simulation analysis results obtained the key factors influencing the jacking construction safety, and put forward three kinds of monitoring measures.â‘¡ Using bridge analysis software MIDAS/Civil 2010 to simulate the process of steel box girder bridge incremental launching construction and carry on the stress analysis of the simulation, and make more comprehensive analysis on the mechanical characteristics and the deformation of the steel box girder.â‘¢ Through the establishment of different load condition, to simulate in the completed stage of various adverse factors on the influence of the bridge, the internal force and deformation of steel box girder is analyzed and calculated by understanding curve by the counteracting force stability of steel box girder, the result shows that selecting rational bearing arrangement is helpful to reduce the influence of Bridges under unfavorable load.