Pc Cable-stayed Bridge Construction Simulation Calculation And Control

The simulation analysis for construction control of cable-stayed bridge is the foundation of the construction control, Based on the Wuhekou Cable-stayed Bridge in Jiangsu Province, according to structural simulation analysis technology and construction controlling theory, the simulation analysis and construction control of prestressed concrete cable-stayed bridge is studied in detail.First, the methods which construction control of prestressed concrete cable-stayed bridge currently used are classified by using controlling theory , and then a rational thinking of control for the bridge is sought. Then, with making use of the theory of simulating analysis for the construction process, a plane finite analysis model for the construction process of Wuhekou Cable-stayed Bridge is established, by which the rational finished bridge state and the rational constriction state is made sure.Then, the construction technics of cradle of cable-stayed bridge are studied, by testing and simulation analyzing of cradle-preloading before the bridge is cantilever placing cast, the method and the significance of cradle-preloading are explained, and the rigidity of the cradle is emended. The stress of transverse diaphragm of cable-stayed bridge is studied also, a three dimension stage model of the bridge is established, by which the stress distribution of transverse diaphragm is analyzed. Meanwhile, the parameters that influence the deflection and cable force of the bridge are studied, and the effect rules and the sensitivity of the parameters are obtained.At last, Combined with the results of simulating analysis, the construction control system of Wuhekou Cable-stayed Bridge is expatiated in detail, and in every construction stage, disparities between actual value and theoretical value of the state variation(including controlling point displacement, cable force, controlling section stress) are given, by which the validity of the construction control is validated.