At present,the incremental launching construction has been widely used in the field of large-span steel truss beam con-struction.Taking the construction process of steel truss beam incremental launching of Yuyao River Bridge as the research object,the finite element model of the bridge is established by midas Civil,the deflection of beam end and rod stress in each construction stage are analyzed,and the measured data are set up at the deflection and stress monitoring points.By comparing the theoretical analysis data and measured data of the beam end deflection and the rod stress,it is found that the two are basically consistent,and the theoretical model can react to the incremental launching state well.By monitoring the deflection of the beam end and the stress of the rod,the attitude of the incremental launching beam can be adjusted in time to ensure the safety of construction.
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