English：

Weihe River Road⁃rail Bridge of the first phase project of Xi’ an Subway Line 10 is a long⁃span road⁃rail continuous steel truss bridge. The main girder was installed by walking incrementallaunching method. Finite element software ANSYS was used to carry out numerical simulation analysis onthe incremental launching construction process of long⁃span road⁃rail continuous steel truss bridge. Themethod of fixing the position of the steel truss bridge and gradually moving the pier position to theopposite direction for the incremental launching was used to simulate the incremental launchingconstruction process. The working conditions of different incremental launching construction distanceswere simulated, and the evolution process of the axial force at the typical position of the wholeconstruction was revealed. The results show that the deformation of the main truss of the bridge iscontrolled within the standard limit during the whole incremental launching process, which meets theconstruction requirements.