Construction Control Simulation Analysis Of Long-Span Cable-Stayed Bridge

There are more and more cable-stayed bridges constructed in China, which makes progress in the design theory of the bridges, structural analysis and the development of the constraction technology. But the long-span cable-stayed bridge is a kind of highly statically indeterminate structure that its design and constraction are very difficult. So it makes the constraction control of the cable-stayed bridge become an important research topic.The constraction control simulation analysis of bridge is the foundation of the constraction control and it serves the bridge monitoring in the progress of the constraction. The constraction control simulation analysis of cable-stayed bridge includes two parts: the determination of the reasonable finished bridge state and the determination of the constraction state.First, the long-span cable-stayed bridge was introduced, which contains the development of the cable-bridge, the relation between the constraction simulation analysis and the constraction control of the cable-bridge and the development trend of the constraction control, then the constraction control was simply introduced. Finally, based on the main bridge of the JiNan JianBang Yellow River, structural engineering analysis software MIDAS / Civil was used to set up the model of the forward analysis method about the constraction stages.The determination of the reasonable finished bridge state is the key of the constraction control simulation analysis of cable-stayed bridge. In this thesis, the control object for the cable force is the bending moment of main girder, use rigid support continuous beam method to determine initial cable force and adjust it, finally determine the reasonable finished bridge state. The forward analysis method was used to analysis the constraction stage. Then we can get the internal forces, the stress and the deflection of main beam, the offset of tower and the internal forces of stayed-cable by all conditions. And choose representative of constraction stage and beam to research, detailed analysis the result of the simulation, summarize some changed laws in the constraction, provide theoretical basis for the implementation of the constraction control.