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And the cable stayed bridge girders together organically, not only beautiful bridge, and according to the selected type of Sarasota and cable layout can form a variety of structural forms, easy integration with the surrounding environment is in line with Environmental design of the bridge forms. In this paper, the existing cable-stayed bridge into a state of reasonable cable force calculation methods described and summarized, discussed the state of the bridge into a reasonable standard. At present the main computational analysis methods are: continuous rigid support beam method, zero displacement method, force balance method, the stress balance method, specify the stress method, the bending energy minimization method, the minimum moment method, with the minimum amount of cable law, the impact matrix method. Analysis overview of the development at home and abroad and stayed Research, discusses cable stayed bridge into force reasonable method for determining comparative analysis of the pros and cons of various optimization methods, and the calculation process considerations. Reasonable construction of the existing state of the cable stayed bridge force calculation methods described and summarized. At present, the cable-stayed bridge construction control, structural calculation and analysis methods include: forward analysis, formal analysis and calculation method, flip analysis, formal wear an inverted split iterative method and unstressed state laws. Describes various analytical methods calculation steps, precautions, and their advantages and disadvantages. What is not explained with closing force? Unmated closing force generation and calculation methods, and how to consider closing force do not meet the dress stayed analysis. Lasso and closing sections are considered unclosed stayed with the force of being installed, the initial equilibrium state analysis calculated initial load overlay is not closed with force, as the construction phase of the control cable force, does not perform reverse split analysis, only Formal analysis is also carried out to make the final stage results with the initial equilibrium state analysis results. Supplemented by two models validated a model for a simple three towers, a bridge to compete for the project instance for authentication. Through the application of this study showed that with the closing force is not considered, only the analysis for cable-stayed bridge being installed, enabling the final stage of the stress state and to bridge the initial stage of the stress state of equilibrium the same. This method is easy to implement, the computational workload is small, and can be very good considering concrete creep and shrinkage caused by non-linear effects, and closed all previous stages because of the stiffening girder weight, Sola force deformation, when folded closed only by segment the impact of their weight from the weight of other structures and Sola force, resulting in a not closed, with the promotional value.
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