Determine An Integrated Approach To Study Cable-stayed Bridge Is Reasonable Bridge

The design of cable stayed bridge is usually started on determining a reasonable complete status of the structure, and afterwards determine its construction status according to the determined completed status by suitable methods. Then get to the determined completed status by construction control. Thus it is a key problem to me resolved in the design of concrete cable stayed bridge.Engineers have concluded many methods to determine a reasonable completed status of prestrseesd concrete cable stayed bridge. Each method has its character an condition. Based on primary study to several methods ,this article proposes a comprehensive method that takes Minimum Bending Energy method together with Stress Balance method. That is so called Comprehensive method. In use of the Comprehensive method, least squares method is used to adjust cable force by limiting moment of girder of cable stayed bridges. This article proposes a conception of reasonable moment under dead load and gives a method to solve this reasonable moment. When engineers use the method of least squares to adjust cables force by limiting moment of girder to the reasonable moment, they will come to a reasonable complete status, which is aimed to a reasonable force in the girder of the cable stayed bridge. Taking the Jingzhou Yangze River bridge as an example this article introduces in detail the step of the determination of the completed status of the prestressed concrete cable stayed bridge by the Comprehensive Method.In the article there is also an analysis about the influence to the complete status of the prestressed concrete cable stayed bridge of such factors as the stiffness change of the girder and the deflection of cables and the concrete creep and the temperature change. This must be useful to engineer to take a reasonable stress limitation in determining the reasonable completed status.Also, the method of determining construction status and the contents of construction processing control are introduced. According to the analysis of the influence factors to the completed status of the cable stayed bridge the article gives the requirement to the construction.