Local Stress Analysis of the Big Intersection Angle V-Shaped Pier of Butterfly Arch Continuous Girder Bridge

To solve the complex problem of V-shaped pier's stress analysis based on the butterfly arch continuous girder bridge in Heihe, China, using finite element analysis method, this paper deals with the distribution rule of stress in V-shaped pier's crucial parts. As the pier has an intersection angle of 115.6 degrees, space analysis model of the V pier is established to simulate the loading capacity and discuss the distribution of tensile stress in this reinforced concrete structure. It's conclude that, top of V-shaped pier, where the rounding region connecting pier and main beam, would like to suffer greater tensile stress, but it will reduce to normal after construction completed. There is a large value but small sector stress in cross-sections of V pier which have abrupt changes, during both construction period and finished stage. Stress in the root of V pier is far from strength limit. However, according to the phenomenon that some of its corners are stretched, it should be pay more attention under construction. At the end of this paper, some suggestions on improving quality of construction and reinforce of structure.