Study On Structural Form Of Spandrel Super Structure Of Long Span RC Arch Bridge

With the progress of design theory, construction material and technology, reinforced concrete arch bridge, CFST and steel one has achieved rapid development. Recently, there are some famous international enterprises in Japan, Croatia and European regions doing the research on the design of huge-span reinforced concrete arch bridge in600to1000meters. Since the structure and arrangement on the arch affects the force and linear in the main arch, therefore the paper makes study in the building structure and arranging form on the arch of huge-span reinforced concrete arch bridge.①Collect domestic and foreign design in the construction form of large-span, huge-span reinforced concrete arch bridge, then analyze the factors affecting the span arrangement of abdominal hole.②Design the arch construction including continuous beam and rigid frame, T-shaped pier rigid frame, junction vault segment overall cast, steel girder belonged steel-concrete composite structures and arch construction, it makes trial design of arch construction contained cross-sectional form and span arrangement.③According to the five structural forms, use the professional software of bridge structural calculation MIDAS/CIVIL to analyze the different forms of arch construction after comparison in the aspects of stress, displacement, arch bridge weight and stability.④Put forward the reasonable layout span scheme of abdominal hole of large-span reinforced concrete arch bridge construction aimed at every form of arch construction.⑤Analyze the stability performance in the dead weight and static wind action after the comparison among the five different forms of arch construction, and judge the buckling mode of the huge-span reinforced concrete arch bridge.⑥Along with the continuous loading of the spandrel superstructure, the ring section occurring angle displacement, lead the columns which close to the foot arch section to produce superior shift. It is necessary to incline the columns during the construction and assure the columns’vertically after the bridge is completed.