Research Of Optimization Of Bridge-Completing Cable Force Of Cable-Stayed Bridges And Reasonable Construction State Based On Influence Matrix Method

Cable-stayed bridge consists of beam,column,cable bridge,the combination of the three components system role to the main girder is equivalent to the main girder cable provides a more flexible support,it improved the stress of main girder,increased the Bridges spanning capacity,but also makes the cable-stayed bridge become the high order statically indeterminate structure,the design calculation is more complicated.The tensioning of the stay cables of the stress of the cable-stayed bridge has a great influence,and the size of the cable force is usually determined by construction phase adjust many times,how to reasonable in construction stage to the process of tensioning the cable-stayed bridge to reasonable into bridge state has become a key in the design of cable-stayed bridge.Chapter 1 of this article first has carried on the brief overview to the development of cable-stayed bridge,and has made the summary to the mechanical characteristics of cable-stayed bridge,and finally introduces the research status of cable-stayed bridge cable force optimization,and put forward the main content of this article research.For the study of the theory part,chapter 2 and chapter 4 of completed bridge optimization method and summarizes summarizes the method to determine reasonable construction state,and to illustrate the theory of influence matrix,finally based on the theory of influence matrix are introduced into a completed bridge optimization and the realization of the method to determine reasonable construction state process.Chapter 3 and chapter 5 is the instance analysis part,first with a single tower cable-stayed bridge as an example the influence matrix method is adopted to reasonable completed bridge optimization analysis,optimization results are basically consistent with the design,verify the feasibility of the method.Then based on the theory of influence matrix,respectively,for the use of full framing construction and the cantilever construction of the cable-stayed bridge with reasonable construction completed,the results show that according to determine the construction process of construction,in the end into the bridge can get reasonable bridge state,each construction stage of stress at the same time meet the specified requirements,the last to calculate into bridge operation stages,during the operating force meet the requirements.The last chapter of this paper summarizes the work of,and this article has carried on the induction,did not consider at the same time the influence matrix theory application in other bridge were discussed.