Abstract:Steel truss structures usually have dense joints and complex designs. Combined with an arched through steel truss beam bridge in Shaoxing City, its overall layout and structural design are introduced. And based on the finite element analysis theory, the general finite element software ANSYS is used to calculate, compare and analyze the live load calculation model, upper and lower chord joints, beam end joints, transverse rib and lower chord joints, small longitudinal girder intersection joints and the structural detail design. The research shows that the gradual break design used for the vertical bar web at the joint plate in the integral joint design can satisfy the requirements of stress and buckling stabilization. The range and magnitude of stress concentration at the joint point of the arch beam are affected by the radius of the arc and the relative position of the fulcrum. The fulcrum close to the joint point of the arch beam is beneficial to the structural stress. The lower flange of the transverse rib supporting the bridge deck can adopt the semi-rigid joints with the small longitudinal beam and the lower chord. Although the web stress in the flange breaking range will be increased to some extent, the overall stress level is low.
