Rigid Frame And Continuous Girder Bridge Engineering Control And Stability Analysis

For the past few years, for its own characteristics long-span rigid frame and continuous girder bridges with high pier have been applied widely, it is necessary for us to control its construction process so as to ensure the construction quality and safety; Meanwhile, long-span rigid frame and continuous girder bridge with high pier is becoming higher and higher, box girder bridge is becoming thinner and thinner, on this situation and background to research the stability and the dynamic problems appear especially important; Therefore, the bridge construction process control and stability problem has important theoretical significance and engineering value.In this paper we take the example of Buermen Bridge which is in the part of Xiangxi of Hunan province as engineering background, on the base of introducing the development trend of rigid frame and continuous girder bridge and its construction control theory, respectively apply three kinds software of BRanalysis,MATLAB,MIDAS/CIVIL made the corresponding analysis. The main research contents are as follows:1.Using BRanalysis software, established finite element model of the entire bridge, studies the bridge linear control method and researches how to set the pre-carrying capacity, discusses various factors affecting the influence of the linear control, and make the key construction stage of the whole bridge static stress check.2.Using MATLAB programming, established BP neural network model of the selection of design parameters and bridge elevation. The model parameter selection in certain scope, through the self-learning training, predict the elevation of subsequent condition in change, and to control the construction of uncertainty factors to provide effective methods and measures.3.Using MIDAS/CIVIL programming, established finite element model of the entire bridge, makes the stability analysis of each construction stage of the whole bridge, get the change rule of stable safety coefficient.4.According to analysis results,the stability safety factor in the construction stage and completed stage is evaluated,the crucial stage preventing instability is pointed out,some references for design and construction of similar bridges are provided.