Research On Structural Characteristics And Construction Control Of Steel Arch Tower Cable-stayed Bridge

In the process of bridge construction,the reasonable condition of the finished cable-stayed bridge is not only the base but also the data-provider of the whole construction monitoring,so it is very important.The structural characteristics of the steel arch tower cable-stayed bridge,the present situation home and abroad,the differences from the concrete cable-stayed bridge are described,Several construction monitoring methods of cable-stayed bridge are introduced in the theory part of this essay.It also described the plan of construction control of this bridge,theoretical calculation,parameter measurement,linear control,cable force monitoring,stress and strain monitoring,temperature field monitoring and identification and prediction of design parameter error analysis.Based on the Chaoyang Yandu bridge,this essay stated the physical truth and the engineering background.It also stated bridge setting,structure size and environmental factors.It did finite element modeling calculates and analyses to Yandu bridge with MIDAS Civil software as well.Several common methods of the reasonable condition of finished bridge are introduced briefly in this essay.In order to assign the reasonable condition of finished bridge,it went through steps including taking the method of control main beam moment as the method of control cable force,using minimum bending energy method to calculate the initial cable force,optimizing and adjusting cable force.Every processes have been calculated and analysed detailly to get data of the beam bending,the stress of the main beam,deflection,cable force,bending moment,stress,steel tower,steel tower deformation and chosing the representative construction process for analysis and study.According to the result of comparison between the data calculated and reality data,the indexes of this bridge such as stress.It did sensitivity analyze to Parameters about the weight of the main girder,the cable force and the temperature effect.As a result,the most sensitive parameters has been found out,and it will be the valuable reference to the design and construction control of bridge.