Sensitivity Analysis And Parameter Identification In Construction Control Of The Cable-Stayed Bridge

The structural analysis for perfectly finished state and reasonable construction state of cable-stayed bridge is the focal and key point of the design. It is a complex system, in which the two above factors are closely interconnected and can't be completely separated. With the increase span of cable-stayed bridge, the construction process is also becoming more and more complex, construction control technology of cable-stayed bridge has become increasingly important.Based on the construction control of Jiangjin Guanyinyan Changjiang Bridge, this thesis will analysis the sensitivity of bridge and amendment the parameters of construction from the two aspect of basic theory and practical application. First of all we should find the main factors or the structural parameters of bridge that may affect the behavior of bridge structure. Secondly we must calculate the extent of sensitivity of bridge structure by varying parameters, according to the calculations the main factors that may affect the structural behavior of bridge will be found, and the linear of beam is the most sensitive by varying parameters in the all structural behavior, so it is the main job that the control of the bridge linear in construction. Finally the beam linear of next construction will be predicted according to the measured data and the use of the gray system theory, with the difference between the measured and the theoretical data we can amend the parameters, and re-take it to the calculation model, which can better guide the next control of construction. So the state of actual construction is closer to the theory, and the quality of the bridge construction can be improved, also it's better to the combination of cable-stayed bridge for long.In this thesis, the method of sensitivity analysis and parameter identification of bridge can be used in other bridges.