Geometrical Solution And Optimization For Cable Tension At Second Stage Adjustment Of Arch Bridge Pre-stressed Boom

The main research contents are the second cable force adjustment for arch bridgepre-stressed boom problems(The target of cable force adjustment problem),and explorein the light of the strategy of realizing the optimization of construction process.Based on the learning of the former scholar of the adjustment of cable forcecalculation problems, selecting the cable force adjustment methodology in the matrixmethod for research relying on this method of in-depth analysis and research to expand.Large-scale commercial finite element software ANSYS to calculate the matrix affectthe relationship between the boom arch cable force adjustment process. In the matrix ofthe process of data analysis and research, recognizing that the boom arch cable forceadjustment calculated matrix has a weak asymmetric features. Add some theoreticalassumptions, for this weak asymmetry can be approximated by the influence matrix as asymmetric, which can take advantage of the affine coordinate system to establish thegeometric description of the boom affect the relationship between mathematics.On the basis of the affine coordinate system, prestressed cable force of the boomhas being state geometry description. According to the error given by the target value ofengineering design, can will cable force state points in the affine coordinates directly forpossible state region, specific area can be can be divided into: the target area, canoptimize regional and the optimization of regional three areas. Will the actual state ofcable force in affine coordinate system determine, on the state of the cable force areaassessment, and to optimize the state points area are the optimization and adjustment ofthe cable force calculation. Because of the boom in design are given in cable force levelis tend to uniform, so for this optimization algorithm of cable force among the criterionof adjustment, the optimization tactics of the cable force adjustment calculation.Through the simplified examples given, will bring together to solve and optimizationcalculation of the specific steps and the processing method in detail description.Finally, the adjustment of cable force calculation of Beidu Bridge, which provedthe validity, applicability and economic value of the method of optimization calculationin Datong city. Furthermore, this method can be used as a subsequent similarengineering structure adjustment of the construction of the cable force for reference.