- Span Continuous Rigid Frame Spatial Analysis For The Construction Control

With the great development cf mountain expressway and elevated road, the curved continuous rigid frame bridge has been growing up rapidly in recent years with its unique predominance of compatibility and comfortable. But it is seldom analyzed for the spatial medianic characteristic, especially during cantilever casting construction phase, because of its relatively late appearance, and the kind of bridge using cantilever casting construct is very unusual even now in china.Based on Bai jianhe Bridge, by using the great spatial analysis software, ANSYS, the spatial mechanic characteristic of long span and high pier prestressed concrete curved rigid frame bridge in both post-construction and construction is researched, and the strategy of construction monitoring technology is also analyzed.1. By selecting the different curve radius and height of pier and building artificial model with the finite element of spatial shell, the influences of curve radius and high pier on the spatial mechanic characteristic of curved rigid frame bridge in phase of completed construction is analyzed. The difference of reaction force in inner and outer side and influencing factor are also discussed in this thesis.2. By using the function of element's birth or death in ANSYS, the influences of self-gravity and prestressing force on the curved rigid frame bridge in construction phase is researched, the paper also further discusses the main parameters such as curve radius and the height of pier.3. The theory of construction monitoring and controlling applied in the curved rigid frame bridge is discussed, especially in the line controlling such as vertical camber, torsional camber and the verticality of pier. And two typical work condition such as non-equilibration state casting and unequal pier's height locking during cantilever casting construction phase is also analyzed.It is very actual meaning that the study of the combine of high pier and curved bridge. Some proposals on design and construction for curved rigid frame bridge are offered in this paper.