Parameter Identification Of Long Span Concrete Cable-Stayed Bridge

In recent years, the economy of our country has obstained greatly development, which promoted the communication enterprise synchronized swift development, as one of the key factors promoting economic growth, our country set the more and more high request to the transportation ability. Constructing the long-span, the high difficulty, the adaptation environment and the artistic bridge has become the request of the time, so the research of long-span bridge's construction control technology appeared as the request of the time, this paper took a certain bridge construction project of Taian Yangtze River Cable-Stayed Bridge in Luzhou as the example to study parameter identification for the successful key of bridge construction control of long span cable-stayed bridge.The cable-stayed bridge is a hyperstatic structure. Making the structure to attain the design expected state is difficult because of large deformation and stochastic error influence on construction process. So,finding certain means to solve the disagreement of the practice state and design state is very important.Firstly, this paper introduces briefly history of cable-stayed bridge, development and main routine of the construction control technologies.A software analyzing bridge structure, BSAS,is used in the simulation of the bridge construction process to find the most influential parameter to the bridge structure with sensitivity analysis. secondly,the Kalman filter method and the Optmization theory are used to identify the parameter that is the most influential parameter to the bridge structure,lastly, analysising the results of parameter identification to conduct the construction.