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With the structure of long-span Bridges rapid development, continuous rigid-frame bridge has strong applicability, construction is convenient, less investment, high efficiency advantages, it also has t-frame and continuous beam advantages to obtain fast development in recent decades. Prestressed concrete continuous rigid-frame bridge has high strength, linear and lively, construction simple quick, strong spanning capacity advantage. It is widely used in the big span Bridges. It has become the first choice for the bridge design. But along with the development of society, bridge construction accuracy is becoming higher and higher. Just as long-span Bridges, Simulation Analysis and Calculating the Upper Structure Strength is particularly important. The paper takes the HanGu-guan large Bridge as an Engineering background for research, a bridge structure analysis software, MIDAS/Civil, carrying on the simulation analysis using the MIDAS. The primary content as follows:Firstly, this paper introduces the developing situation of domestic and foreign of long span continuous rigid frame Bridges and future development trend, and then takes research on the long-span rigid-frame and its construction monitoring in practical projects. Secondly, introduces the finite element analysis theory and bridge structure simulation analysis theory and so on. It has conducted the analytical study. Finally, takes HanGu-guan large Bridge as an example and carries on the finite element division. In the simulation analysis process, emphatically analyzes the linear control and stress control. Through calculation and analysis, we get the deflection and stress of the theoretical value of continuous rigid frame in construction process. According to the calculation data, summary the bridge structure stress and deflection regularity and trends. Finally, checking the upper structure strength and deformation of the bridge.
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