城市变宽异形钢箱梁桥的设计研究与工程应用OA

With the increasing construction of urban viaduct bridges,there are more and more structural forms of bifurcated bridges,widened bridges,and curved bridges on viaduct,so the analysis of widened special-shaped box girders becomes increasingly important.Based on the engineering background of the variable-width steel box girder of an elevated bridge project(34.5+34+33)m in Shanghai,this paper designs the details of the steel box girder's alignment,overall layout,diaphragm position,longitudinal stiffener setting and plate thickness.The spatial element model is established by using the beam grid method,and the finite element analysis is carried out on the steel box girder bridge.The displacement,internal force and stress are numerically analyzed on the calculation results,and plate elements are used to verify the correctness of the calculation,providing a reliable basis for designers.