Reasonable Cable Tension In Finished State Of Cable-Stayed Bridges And The Control During Construction

Cable-stayed bridge is the main component of the main beam, and the tower cable-stayed, which is a major pressure on the bridge deck system, cable system by widening the bridge. Its deck system is posed by stiffening beam, supported by the system of cables. The main tower of the cable force size is very sensitive, and the tension of the cable-stayed can be adjusted .So there is a cable-stayed bridge design through optimization of the cable bridge to optimize Cable-stayed bridge internal forces of the legitimate status of the bridge by identifying the problem.The state of bridge stress can not determine the status of the construction process in order to bridge the state's system for stress analysis of the object through the bridge of the cable force adjustments to get into a reasonable state of the bridge. In this paper, which is the need to solve two issues: first, why the bridge into a kind of state is reasonable; second, how to adjust the bridge for the cable force has been set to get into a reasonably good state of the bridge.Cable-stayed bridge in the structure of the calculation to determine the status and objectives of bridge construction is the goal of two states crucial to the work, usually to determine the bridge into the goal, and then to bridge the target based on a state based on the construction process to determine the construction the last state.Based on Zhongxian County in Chongqing Yangtze River Bridge Construction simulation of cable-stayed bridge, the cable-stayed bridge in the design stage to optimize the cable-stayed bridge cable force has been optimized to enable it to the bridge towers, the main beam, such as cable bridge in all its aspects (including moment, around, stress, displacement, etc.) of the force in a more reasonable and in the process of construction of the aspects of the issue resolved.Main problems solutioned include:(1) The reasonable bridge on the way, through a cable-stayed bridge to a better method of force to get the maximum optimization. Through the main beam of stress, displacement, the moment in areas such as compared to results. (2) Determining a reasonable state of the construction method of calculation are: inverted demolition, is loaded method, no stress state law. Through these three methods of comparison, you can let us know each other's merits and shortcomings.And the calculation method is with the problems that exist in an analysis and consideration, such as the shrinkage of concrete, creep and geometric structure of nonlinear problems.(3) Construction of the cable-stayed bridge section of the cable force and full-bridge cable force a special study. Construction and design value and actual value comparison, the construction of the problems to resolve. To ensure that the construction process of structural safety.(4) How to reduce power demand during the design process and construction in the process of error is taken into account in the future a major problem, as power demand optimization, I believe that with the development of science and technology, will be a better way, So that the force structure is more reasonable.Through the above analysis of the issues to consider, the cable-stayed bridge provide some guidance for the future.