The Simple Analyse Of Construction Control For Cable-stayed Bridges

With the development and improvement of modern science and technology and electronic computer gradually, and with the quick development and extensive application of modern large construction mechnical equipments and construction architectural material, the construction of long-span cable-stayed bridge is not only proved to be true and feasible, but also has been taken into reality. Although construction and construction control procedure of long-span cable-stayed bridge is a very complicated work, at present, analysis and research on construction control of long-span cable-stayed bridge have become an important problem that many bridge engineers and researchers pay an attention to.First, the importance, content, principle,method, influence factors of construction control of long-span cable-stayed bridge were described and also the basic theory of finite element analysis in this paper. Then the construction control system of long-span cable-stayed bridge were studied in detail basing on the construction supervision of a cable-stayed bridge on HuangHe river.There are many construction control methods of cable-stayed bridge, such as forward-calculation method, backward-calculation method, binding method of two ones etc. Because the line shape was difficult to control when forward-calculation method was adopted, in addition, the concrete creep strain and shrinkage strain also the loss of prestressing force can't be considered as adopting the backward-calculation method, the binding method of forward and backward was suggested to be adopted, it takes the construction emulating analysis to the HuangHe bridge adopting the forward calculation method and the binding method according to the construction characteristics, and the results were took to compare. In addition, one time stretch for cable force was took to compare with the multiple times also. The binding method of forward-calculation and backward-calculation which was most accurate was obtained. The effect of droops affections on cable forces was researched by the end.