Analysis Of Local Mechcanic Behavior And Construction Control Of Single Tower Cable-Stayed Bridge Combinated With Continous Rigid Frame

The cable-stayed bridge is an indeterminate structure with high degrees, and the structure analysis of the cable-stayed bridge is complicated.Construction method is closely related to the internal forces state and deformation of the bridge. In order to keep the bridge in the internal construction course safety and the deformation of the bridge reasonable, so the construction control of large-span prestressed concrete cable-stayed bridges becomes an important research subject. The accurate model should be constructed and the effective structural analysis method should be taken to analyze and study the structural behavior in the construction stage and service stage of cable-stayed bridges.The thesis takes the Xijiang spacially long span bridge on the express from Guangzhou to Zhuhai as background. The bridge is a composite bridge with single pylon cable stayed bridge and continous rigid frame bridge. The thesis takes the bridge style as the point of view, and analysis the action of each the cable and continous rigid frame in the composite bridge.First, the thesis overviews the structural characteristics and development status of the cable stayed-continuous rigid frame composite bridges and meanwhile analysis the theory of the calculation of long-span bridge structure to fix a reasonable method of calculation of the bridge.Secondly, the thesis analysis the construction process simulately of some large-span bridge which is a composite bridge with single pylon cable stayed bridge and continous rigid frame bridge and advances the calculation of the construction control simultaneously.Basis on the analysis of the construction control theory and the results of site construction control of the bridge, the thesis advances some construction control methods of large-span single-tower cable-stayed continuous rigid frame composite bridge which is more reasonable and more practical and establish the technical and organizational management systems about construction control of bridge.Finally,the Author establishes ANSYS models about consolidation parts of bridge pier.tower and beam where force is complex.In the models, the Author exerts border force which is from the Calculation of the entire bridge under load combination as external load on the models。Through this approach, we can come to the regional stress cloud of these parts。 The results show that the force of the consolidation parts of bridge pier.tower and beam is reasonable.Therefore, the structure behaviors of cable-stayed bridge can be deeply understood,and the method to compute and analyze large-span concrete cable-stayed bridges can be learned.Meanwhile,this paper can be helpful for the construction and design of large-span prestressed concrete cable-stayed bridges.