Research On The Rational Status Of Wuxiang Bridge And The Bridge Status Parameter Sensitivity Analysisthe

In this paper, Wu XiangBridge as the research background, it belongs to the structural symmetry and asymmetry of concrete construction technology of steel main beam main tower cable-stayed bridge. The features of the bridge’s construction make structural stress analysis in the construction process very complex, so ensuring the status of the bridge has its specific meaning reasonable. The main contents are as follows.1) In this paper, a comparative study of continuous rigid support beam method is combined with the minimum bending energy method to calculate the results. And the use of these two methods of cable forces carried out Wu Xiang bridge as the beginning of the proposed bridge, the results are analyzed, and the two algorithms are summarized to determine the cable force, main girder moment, Sarasota moment reaction force characteristics, determining a reasonable state as laying the foundation for the later Wu Xiang Bridge.2) The paper has proposed a "concrete towers to determine a reasonable steel box girder bridge into a comprehensive state law." Firstly, the tentative uses the "bending energy method" for the dead load cable tension, and then mix thoroughly in order to get a more uniform dead load cable tension, and the bending moment of cable-stayed tower is small; then using stress to research the impact of live load balance method to calculate the minimum moment feasible region, based on the material properties of the main tower and girders of with Wu Xiang Bridge. When controling objectives of the physical feasible region, the main tower is mainly stressed, and the main beam stress is supplemented, combining with the impact matrix and least squares method to adjust the amount of the bridge to get into the state, and then to determine the reasonableness of a bridge state; put "comprehensive method to determine the concrete towers of steel box girder bridge into a reasonable state" to determine a reasonable state of Wu Xiang Bridge, then the bridge is inspected and the feasibility and practicality of the method has been verified.3) To investigate the state of the construction process and reasonable construction of two construction plans discussed by the comparative analysis of the reasonableness of the two programs, proposals are put forward, and to determine the control parameters to achieve a reasonable state bridge construction process requires tension cable force, steel main beam alignment and installation elevation of stress, stress-free cable length and other parameters. Comparative study of the cable-stayed unstressed cable length is calculated parabolic theory and the theory of suspended connections, cable-stayed unstressed length with two different calculations.4) Through the influence of bridge status as a parameter sensitivity analysis:the construction process, heavy beam, main beam stiffness, rigidity of the main tower, temperature changes, cable modulus of elasticity, while cross member bracket stiffness parameters of the error estimates, and after midas/civil modeling computational analysis of component parameters on steel box girder cable-stayed bridge into a state classification, summed up what was a more sensitive component parameters, which are non-sensitive parameters, and construction process make recommendations and measures to ensure a reasonable approximation of the bridge or the bridge to reach the state.