The ultra-wide double-sided steel box girder self-anchored suspension bridge can be better used in urban bridge construction due to its delicate linear shape and light structure, as well as its characteristic of not being restricted by geological conditions. Taking Yunlongwan Bridge in Chengdu, Sichuan Province as the background, aiming at the ultra-wide separated steel box girder, ANSYS finite element analysis software is used to establish the beam-shell element combination model to study the lateral deformation and stress at the mid-span target section under eccentric load. The stress amplitude of the roof and its distribution and diffusion along the transverse direction under different stiffness of the bridge are analyzed. Finally, the influence of the tensile stress and stress amplitude of the bridge deck on the fatigue of the bridge structure and the durability of the bridge deck pavement is discussed.

CICTP