Abstract：Research purposes ： To improve the speed limit standard of train when passing construction site of frame bridges jacking — in，optimize the design process of railway reinforced system with cross beam and solve the difficult problems on construction site，static modeling and dynamic calculation of railway reinforced system are carried out based on finite element theory and vehicle — rail interaction theory，related indexes of railway reinforced system are analyzed when train is passing. Standards of static modeling and dynamic calculation on railway reinforced system are established by referring to codes and rules, and calculate results are evaluated.
Research conclusions ： Static model used in this article can simulate the construction site more accurately，dynamic calculation can simulate the acceleration and load reduction of reinforced system, and the vibration and resonance phenomenon can be reflected. Calculation and evaluation of railway reinforced system should be held under static and dynamic calculation. The results should be evaluated under advised standards listed in this article, then the conclusion can be more reliable. The research conclusions in this article can be applied to design and evaluation of railway reinforced system.
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2014, Vol. 31 
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