Study On Optimization Of Cable-stayed Bridge Construction Cable Force Based On Dynamic Programming Method

Cable-stayed bridges are one of the most widely used bridges in the world because of their excellent structural features,technical advantages,and attractive appearance.In the actual construction process,due to the complex and long-term construction process of cable-stayed bridges,there are many factors that affect the state of the cable-stayed bridge during the construction period,resulting in a deviation between the final state of the bridge and the state of reasonable completion of the bridge.Therefore,it is necessary to Conduct construction force optimization.At present,the cable tension optimization method for cable-stayed bridges requires multiple adjustments and iterations for the cable tension of the cable stays,and the final state of the resulting bridge is not ideal.In order to solve the above problems,this paper proposes a dynamic programming method to optimize the cable tension of cable-stayed bridges.The dynamic programming method is used to extract the mathematical model of cable-stayed bridges’ construction force optimization,and the calculation formula for the cable tension of cable-stayed bridges is deduced.Use ANSYS to calculate the vertical displacement of the main girder of a cable-stayed bridge when it is properly bridged,and then use the function of the ANSYS life and death unit to determine the influence matrix of the main girder construction and the tensioned cable to the vertical displacement of the main girder;These influence matrices and the ideal vertical displacement at each stage are introduced into the calculation formula of the cable tension of the cable-stayed bridge,and the initial tension of the cable-stayed bridge can be calculated.The dynamic cable is used to optimize the cable-stayed bridge model.The construction simulation is carried out in the laboratory.The construction simulation is used to further verify the accuracy of cable-stayed bridge construction force optimization through dynamic programming.The results show that the optimization of cable tension for cable-stayed bridges by dynamic programming method can be achieved by calculating the initial tension of cable stays at a time without multiple iterations or adjustments and the calculation results are relatively accurate.This method has certain guiding significance for the actual construction ofcable-stayed bridges.