In recent years, along with our country of bridge aesthetics gradually valued, famous for its elegant modelling and lightweight structure of super wide bilateral steel box girder self-anchored suspension bridge, and not affected by the characteristics of the geological conditions, it is widely used in urban bridge construction. Based on Yunlongwan Bridge in Chengdu, Sichuan province as the background, in view of the super wide separated steel box girder by using finite element analysis software ANSYS to establish finite element beam and shell element model, under the effect of different test conditions, analyzing the super wide bilateral steel box girder’s transverse stress and transverse deformation, it is concluded that the transverse deformation and stress distribution. Under the influence of shear lag effect, the local effect of girder roof is obvious, and In addition, negative shear lag effect occurs at the junction of the transverse and longitudinal girders, and the girder’s torsional deformation is obvious under unbalance load.

CICTP