Finite element analysis of temporary pre-stress system of precast segmental box girder bridge

The precast segmental bridge has the advantages of fast construction speed, good economic performance, and small impact on surrounding environment. In order to study role temporary pre-stressing system in cantilever assembly process segment box girder bridge, ABAQUS was used simulate standard section a viaduct. Studying compressive stress relative sliding joint under action self-weight pre-stress, reasonable number spatial arrangement tension pedestal are determined. research results show that too few roof pedestals will cause large area decompression state much period be longer. When symmetrical is located inner side web, it obviously increase zero-compression at end top slab. distance between center web 0.12L, full meets minimum consolidation pressure requirement glued joint. their provide specific guidance reference assembling actual future.