Parameter-Accuracy Analysis Of Prestressed Concrete Continuous Rigid Frame Bridge

In recent several years, the PC continuous rigid frame bridge is developing very quickly. The continuous rigid frame bridge has the advantages in cis-bridge to the bending stiffness and cross-bridge to the torsional rigidity. Because of the small deformation, the driving smooth and comfortable, the expansion joint to be few slightly, the maintenance resilience is small, this bridge-type has been more and more widely used in long-span bridge construction.In construction control of bridge, it is surely different between the theoretical calculations and the actual situation. We consider a very ideal state in theoretical calculation, such as cantilever construction is completely symmetric and the parameters is uniform. However, However, due to various factors affect the actual construction of the deviation with the theoretical bound. Then we need to analyze each of these deviations and to identify their effects in order to carry out the construction control better.First of all, this thesis introduces the domestic and foreign continuous rigid frame bridge history and development. Describe the current theory and general technology of construction control. Explicit the purpose, content, some means of construction control. Review how to analyze the parameter identification and correction.Secondly, according to the actual problems encountered in construction control,combined with theoretical analysis to identify causes and propose solutions. this thesis was based on the construction of a PC continuous rigid frame bridge, which the main bridge with spans of 110+200+110m.Then establish the simulation analysis models by Dr.Bridge and Midas/civil finite element software. The stresses and deformation of the bridge in different construction and operational stages are calculated. And obtain the corresponding results. In cantilever construction condition we can calculate the structure features such as the deflection of the beam cause by temperature between top flange and bottom flange by sunshine. And propose the appropriate solutions. Sensitivity analysis of many parameters for example the elasticity modulus and the unit weight of concrete, the parameters of prestress. Observe the sensitivity of the parameters in the structure. The parameters that influence dramatically must be controlled strictly. Insure the linear and stress of the bridge to reach the optimal state.Finally, by syntheseing the research productions, draw some conclusions meaningful and will be a certain reference or the model significance to the later same type bridge construction.