| Concrete-filled steel tubular (CFST) arch bridge is a new type of bridge system, as its good performance and big spanning ability, it is in the advantageous competition position in the modern bridge construction. However, to combination system bridge which take one kind of arch combing with beam that is the statically undeterminated structure system, the force analysis process is complex.Along with span enlargement, its construction difficulty happened like main arch rib hoisting, the overstresses in the joints ,the adjustment of suspension bar and so on construction loading procedures and more complex in the structural system, also the structural stability is especially prominent. Along with the new material utilization and new construction methods in recent years, such as concrete filled steel tube utilization, it is necessary to carry on the further research because of it's complex performance.This thesis take minyue bridge as an example for study works. This bridge is a half-through CFST main arch fixed on the piers with two half-cantilevered deck arches, tied by the prestressed steel bar at the ends of the side spans. Since San-shanxi Bridge in Nanhai, Guangdong, built up, about twenty of such bridges have been built and the spans become larger and larger. In spite of many analysis on individual bridges have been carried out, however, systemic and thorough research on this type bridge is lack.This thesis established the finite element analysis model for the mingyue bridge, proposed the computational method to simplified section Concrete-filled steel tubular, unified the finite element procedure to construct various stages to carry on the computation and the confirmation, have confirmed its construction loading sequence rationality. Not only the theory basis and the reference for this project has been provided , but also an example for understand the performance of this kind of bridge has been provided through structural analysis.
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