Strongly subfeasible sequential quadratic programming method of cable tension optimization for cable-stayed bridges
斜拉桥索力优化的强次可行序列二次规划法

A practical optimization method (strongly subfeasible sequential quadratic programming method) of cable tension optimization for cable-stayed bridges is presented, with a model for nonlinear optimization programming to obtain the force in cables of cable-stayed bridge, in which the bending strain energy of the beams and cable tower of the bridge is the objective function, and the cable forces are the design variable, the stress in the structure or the cable force is the constraint condition. In order to determine the prestressing force of the cables, the influence of various geometrical nonlinearities is considered, and the strongly subfeasible sequential quadratic programming method is used to solve the program. This method is used to obtain the set of optimal cable tensions of a cable-stayed bridge using the spatial nonlinear finite element program. The result of analysis shows that the method is effective.