Simulation Analysis On The Construction Of Concrete Cable-Stayed Bridge With Single Tower And Single Cable Span

With employment of high strength material, improvement of structural analysis, and development of construction ways, it is a rapid developing period for cable-stayed bridge in the 90's, 20^thcentury.With the span's increase and diversity of structure, have caused many tasks to construction control of cable-stayed bridge, simulation analysis on the construction of cable-stayed bridge is not only the main means to determine the Static state of cable-stayed bridge, but also is one of the construction control's main jobs , it offer advisability and scientific gist for monitoring and control. To raise the technologies of simulation analysis on the construction's level, and it will get great significance for better quality and less expense in bridge construction.This text analysis the construction control's actuality for cable-stayed bridge both here and abroad firstly, introduce the construction control theory, method, principle and influence factor for cable-stayed bridge, do relatively detailed analyses and research for the cable-stayed bridge construction stage's construction control.In this paper, the control objective for the cable force is the bending moment of main girder, use least bending energy method to determine quiescent load cable force, suppose the initial tension of cable force to model's forward-analysis, compare the computation result with the advisability condition of cable force, use cable force's quadratic optimization to adjust initial tension up to arrive the not closed minimum value till, this method can get streamlined construction condition only needs forward-analysis method.At the simulation computation of construction control, proceed the summarize of stayed-cable bridge structural element's analogue simulation, use Shizhou bridge for the background, built entire bridge model base on the Midas/ Civil finite element soft ware, and according to this cable-stayed bridge's construction point to computational model conducts the research, known this structural model's distortion, stress, straining and so on of self load, cable force, design load, temperature fluctuation, shrinkage creep and load combination, make factor analysis for construction control, proceed detailed analysis for the result of construction control simulation computation.